#Lower Jurassic bivalve

[uk-fossils]

Pleuromya costata Fossil Bivalve | Lower Pliensbachian Jurassic Blockley UK | Genuine Specimen with COA

Add a beautifully preserved example of ancient marine life to your fossil collection with this genuine Pleuromya costata fossil bivalve, originating from the Lower Pliensbachian stage of the Early Jurassic period, found in Blockley, United Kingdom. This species of extinct bivalve once thrived on the seafloor of Jurassic oceans that covered much of Europe over 185 million years ago.

Fossil Type: Bivalve Mollusc

Species: Pleuromya costata

Geological Period: Jurassic (~201 to 174 million years ago)

Geological Stage: Lower Pliensbachian (~190 to 183 million years ago)

Location: Blockley, Gloucestershire, UK

Scale Rule: Squares/Cube = 1cm (Refer to photo for full sizing)

Specimen: The specimen pictured is the exact item you will receive

Authenticity: All of our fossils are 100% genuine specimens and come with a Certificate of Authenticity

Geological and Paleontological Context

Pleuromya costata is an extinct genus of marine bivalves known for their long, elongated shells and distinctive ribbing (costae). These molluscs lived partially buried in soft seafloor sediments and were part of diverse marine ecosystems during the Early Jurassic.

Phylum: Mollusca

Class: Bivalvia

Order: Nuculanida

Superfamily: Nuculanoidea

Family: Pleuromyidae

Genus: Pleuromya

Species: costata

Geological Stage: Lower Pliensbachian (Early Jurassic)

Depositional Environment: Shallow marine shelf; soft, muddy seafloor rich in calcareous and silty sediments ideal for fossilisation

Morphological Features: Elongate, narrow shell with prominent radial ribs (costae); hinge line straight with slight curvature; likely adapted for semi-infaunal filter feeding

Biozone: Often associated with ammonite zones such as the Uptonia jamesoni and Prodactylioceras davoei zones, important in Lower Jurassic stratigraphy

Notable: Fossils from Blockley’s Lower Jurassic formations are widely used in UK geological education and contribute to international Jurassic biostratigraphy

Why This Fossil is Special

Pleuromya costata is not only a visually appealing fossil but also an excellent representative of bivalve evolution during the Early Jurassic. Its distinct shape and ribbed texture make it ideal for collectors, educators, and display.

Why Buy From Us?

100% genuine fossil with Certificate of Authenticity

Exact item shown is the one you’ll receive

Ethically sourced from reputable UK fossil localities

Ideal for fossil enthusiasts, paleontology educators, and collectors of ancient marine life

Own a genuine piece of Jurassic seafloor with this beautifully preserved Pleuromya costata fossil bivalve from the Lower Pliensbachian strata of Blockley, UK—a shell frozen in time for over 185 million years.

[shadowsayshi]

my paleo prof:

[mesozoicmarket]

A bivalve fossil of an Antiquilima succincta from the Frodingham Ironstone in Coningsby, Scunthorpe, Lincolnshire, England. This Lower Jurassic aged bivalve is found in various regions of Europe.

[alphynix]

Strange Symmetries #10: Shellraiser

Brachiopods (also known as "lamp shells") superficially look very much like bivalves, but these two groups aren't very closely related to each other – although they're both lophotrochozoans, their last common ancestor probably lived sometime in the Ediacaran at least 560 million years ago, and their similarities in appearance are due to convergent evolution.

The two valves of their shells are also arranged differently. Bivalve shells grow on their left and right sides and are usually symmetrical, but brachiopods form their shells from the upper and lower surfaces of their bodies.

As a result brachiopod shells are usually unequal in size and shape but have their own plane of bilateral symmetry down the center – but some of them still managed to become asymmetrical anyway.

Torquirhynchia inconstans lived during the Late Jurassic, about 161-145 million years ago, in the warm shallow seas that covered what is now Europe and Iran. Around 3cm across (~1.2") it had a strongly ridged shell with an asymmetrical closing edge, positioned high on one side and low on the other.

This unusual uneven arrangment is thought to be an adaptation to living on soft sediments. Asymmetrical brachiopods like Torquirhynchia may have lived with one side of their body mostly buried into the seafloor, and twisted their shell edges so the still-exposed half was raised up to better function for water circulation and filter-feeding.

———

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[johannesviii]

Fossil Hunting 2020

Same place I usually go to. Two days (back in September 2020), something like seven hours of walking, and some lovely finds.

The stratas represented where I was hunting were mostly of the Oxfordian stage (Jurassic). I wish I could identify everything here, but I’m just an amateur, so it’s a bit frustrating.

Urchins! I've never found any in that location before! The second one clearly fell from another strata and I'm not sure which one.

Various small shells, mostly brachiopods. Can identify goniorhynchia boueti, probably from a lower stage (bathonian?)

Myophorella

Various mussels

I'm sorry I'm terrible at identifying bivalves

Pecten

Lopha gregaria

Ammonites. That big one at the top is lovely

Ammonite fossilised in pyrite 1/2 and 2/2

That tiny pyrite ammonite might just be my coolest find ever, I screamed like a banshee when I saw it.

[a-dinosaur-a-day]

Saltriovenator zanellai

By Guidy Cook

Etymology: Hunter from Saltrio

First Described By: Dal Sasso et al., 2018

Classification: Dinosauromorpha, Dinosauriformes, Dracohors, Dinosauria, Saurischia, Eusaurischia, Theropoda, Neotheropoda, Averostra, Ceratosauria

Status: Extinct

Time and Place: Saltriovenator lived between 199.3 and 197.5 million years ago, in the Sinemurian age of the Early Jurassic 

Saltriovenator is only found in the lower layers of the Saltrio Formation of Lombardy, Italy 

Physical Description: Saltriovenator is one of the earliest examples of a Ceratosaur, found at the beginning of the Jurassic period, much earlier than most other members of the group. Ceratosaurs were a group of basal theropods that lasted throughout the Jurassic and Cretaceous, and were some of the largest carnivores in their environments - and some of the most agile large carnivores, aside from Tyrannosaurids. Thus, Saltriovenator is vital in our understandings of the origin of this group at the base of the Triassic-Jurassic transition.

Saltriovenator is known primarily from parts of the jaw, arms, ribs, and lower leg, so it’s difficult to say much about it specifically compared to other members of the group. The one specimen of this animal is a subadult, so it probably got bigger than current length estimates for the creature, at 7.3 meters long. Still, this means it was probably one of the largest predatory dinosaurs at the time, longer than any other that existed at this point. It actually might have been slightly longer than the much later Ceratosaurus. It had a very delicate skull, and a narrow lower jaw like Allosaurus rather than its much closer relative Ceratosaurus. It had long, narrow teeth, and hands similar to its relative Ceratosaurus, with slightly bended fingers. It also had medium-length, skinny lower legs, and a fairly robust torso. It’s tail, not being a Tetanuran, was more floppy than most other Theropods.  

By Cristiano Dal Sasso, Simone Maganuco, Andrea Cau. CC BY 4.0

As a Ceratosaur, it is unlikely that Saltriovenator would have been particularly feathery, however, its small size makes it possible that it would have retained some feathers for thermoregulation.

Diet: As a Ceratosaur, closely related to Ceratosaurus and Berberosaurus and similar in overall jaw shape, Saltriovenator was a carnivore, probably an obligate one, feeding on small to medium sized prey in its environment.

Behavior: It is uncertain if predators such as Saltriovenator and other early Ceratosaurs were particularly social in terms of hunting and lifestyle. The fact that one skeleton was found alone tells us little, as well - it seems entirely likely that the skeleton was washed out to sea, making determining behavior difficult. Like other dinosaurs, it probably would have taken care of its young; the small forelimbs were probably not used much in hunting, though it did have robust hands that could have been used in manipulating tough or fidgety food. It is probably unlikely to have been very fast, though without information about the thighs and calves it is difficult to say either way on that score. 

By Lucas Atwell, CC BY-SA 3.0

Ecosystem: The Saltrio Formation is actually an aquatic formation, filled with a variety of ocean-dwelling invertebrates such as crinoids, bivalves, brachiopods, bryozoans, and ammonites. Thus, this probably isn’t the environment Saltriovenator lived in, and it’s difficult to say what sort of ecosystem it called home. However, it probably did live along the beach, feeding on small animals in the same region. It probably even fed on a fish or two, including sharks known from the area. There were probably some other early dinosaurs around, too, but they are not well known.

Other: Basal Ceratosaurs have a fairly messy phylogeny - it is uncertain where they go and who is more closely related to what. For now, Saltriovenator has not helped that picture much, but it does appear to be the closest relative of Berberosaurus. Saltriovenator shows a mixture of characteristics shared by early Tetanurans and Ceratosaurs. Saltriovenator also helped to fully debunk one of the more esoteric ��birds-are-not-dinosaurs” arguments, so that’s nice.

~ By Meig Dickson

Sources under the cut 

Dal Sasso, C., S. Maganuco, A. Cau. 2018. The oldest ceratosaurian (Dinosauria: Theropoda) from the Lower Jurassic of Italy sheds light on the evolution of the three-fingered hand of birds. PeerJ 6: e5976.

Lualdi, A. 1999. New data on the Western part of the M. Nudo Basin (Lower Jurassic, West Lobardy). Tubingen Geowissenschaftliche Arbeiten A (52): 173 - 176.

[geotourism]

Triassic Beds of Lake Lugano and Ticino In Switzerland

Lake Lugano Switzerland

Lake Lugano is a glacial lake in southern Switzerland and borders Italy. It is situated between the Alps and the Lepontine Alps in the canton of Ticino. The lake and surrounding area are popular tourist destinations, with many villas situated around the shores. The average water temperature at Lake Lugano is 10 degrees Celsius in the summer and 2 degrees Celsius in the winter. It has a surface area of 48.7 km² and a maximum depth of 288 m. The lake is fed by the River Ticino and has a drainage basin of 9,000 km². The main towns on the shores of the lake are Bellinzona, Lugano, Mendrisio, and Locarno. The lake is popular for its recreational activities such as boating, fishing, swimming, and windsurfing.

Popular Attractions on the Lake

Lake Lugano is a popular tourist destination in Switzerland. The lake is surrounded by mountains, making it a picturesque location. There are many popular attractions on the lake, including the Villa Diodati, the Botanical Garden, and the Villa Silvia. Lugano Mountain is the highest peak in the canton of Ticino and the highest point in Switzerland. The mountain is part of the Pennine Alps and is located in the municipality of Lugano. It has an elevation of 2,997 meters. Lake Lugano is known for its amazing views, and there are many top attractions located around the lake. Some of the top attractions include the Villa d’Este, the Villa Monastero, the Castelgrande, and the Botanical Garden.

Geology of the Area

The lake is 48.7 km2  in size, 63% of which is in Switzerland and 37% in Italy. It has a maximum width of about 3 km at the bay of Lugano. A maximum depth of 288 m is found in the northern basin.  The pyramid-shaped, wooded mountain of Monte San Giorgio is located beside Lake Lugano and is regarded as the best fossil record of marine life from the Triassic Period (nearly 245 million years ago). Diverse marine life flourished within this lagoon, including reptiles, fish, bivalves, ammonites, echinoderms, and crustaceans. The area comprises Triassic carbonate formations, mostly within the protected area, which outcrops between both older volcanic and more recent sedimentary formations of the Southern Alpine Series in the buffer zone.

Permian andesites and rhyolites of volcanic origin are exposed on the north face of lake Lugano. Jurassic limestone formations occur on the lower slopes which dip at the mountain foot under the sediments of the Po valley. The Middle Triassic sequence occurs in beds of limestone more than 1,000 m thick. The Triassic sequence includes conglomerate and sandstone (Bellano formation), reef limestone, dolomites and bituminous shales (Besano formation – the main fossil-bearing horizons), marls, limestones and gypsum (Pizzella marls), marine dolomites and dolomitized oolitic limestone (Tremona beds).

Activities on and around the Lake

Lake Lugano is a great destination for a lake vacation. It is surrounded by mountains, making for beautiful scenery. There are many popular Spots located around the lake, making it a great place to enjoy some recreation. Some of the most popular include swimming, boating, fishing, and hiking. A day trip to Lugano is a great way to enjoy the sights and sounds of the city without having to stay there overnight.

Also read- The Great Plains USA: History, Facts, Map And Geology

Morcote village

Morcote is a popular village located on the shores of Lake Lugano. There are many restaurants and shops located in the village. Morcote is also home to Morcote Castle, which is a popular tourist attraction. Apart from this Lugano villages include, Bellinzona, Cossonico, and Sarnico.

Lake Ticino, Switzerland

Lake Ticino is a large lake in the Swiss Alps and it is also the second deepest lake in Switzerland. The lake is popular for boating, swimming, fishing, and hiking. There are many places located around the lake, including the Finsteraarhorn, the Jungfrau Region, and the Seelisberg. It is surrounded by some of the most popular tourist attractions in the country. There are plenty of activities to enjoy on and around the lake, including swimming, hiking, boating, and skiing. The weather and temperature can vary depending on the time of year, so be sure to check the forecast before your visit.

[janesnewweblog]

Fabulous fossils in the Chedworth area

OUGS field trip, 2 July 2017

‘The old people are coming!’ A cohort of urchins, busily engaged in childish activities in Stony Furlong Quarry, thus greeted the arrival of the OUGS Severnside branch’s finest as we began a study tour in the Chedworth area.

Dr Paul Olver led this sortie into the Middle Jurassic, taking in two sections of railway cutting of the Midland & South Western Junction Railway to follow the succession of outcrops from the Great Oolite series in the quarry, dating from around 165 million years ago, to the older exposures near the Roman Villa.

First on the agenda was a cup of tea and the chance for breakfast at the Denfurlong Farm Shop – well worth remembering for future visits to the area. Then it was off to the cutting for a spot of hands-on geology, with fossils aplenty to be found in the rocks.

The White Limestone in the quarry proved a rich hunting ground whilst providing evidence of a marine environment, with the lower (softer and browner) rocks showing a more brackish environment with less biodiversity.

The fossil finds ranged from brachiopods and echinoids, plus one beautiful fish vertebra, to gastropods and bivalves. My personal favourite was a tiny but very lovely gastropod revealed in a crumbly piece of limestone I was able to pull apart, showing the creature and the impression on the opposite piece of stone.

From there we abandoned the urchins to their foraging and departed en masse on a picturesque drive to the car park by the Roman Villa. Lunch was a very civilised affair in the café at the National Trust property, before the party headed up into the woods and the second stretch of cutting.

This section of older rock dated from the Inferior Oolite Group (inferior only in the sense of lying beneath the Great Oolite Group), with echinoid fragments being the main attraction at our first stop, the Clypeus Grit.

Over the afternoon the group walked the length of the cutting, stopping at 10 locations to look for fossils and examine features including a tufa waterfall and a normal fault.

For me, as a relative newcomer to geology in the field, this was a great opportunity to see geologists in action and to have a range of people to chat to and question. The leisurely pace gave everyone the chance to have a good go at finding fossils – pick of the bunch were the fish vertebra, a beautiful bivalve like a razor shell, thalassinoides and Trigonia costata, shaped like a tricorn hat and featuring three sides with varying ornamentation – and to ask questions.

Best of all was just being able to chat to other members of the group about OU studies, geological activities around the area and field trips to far-flung areas of the globe.

Thanks to Paul for leading an excellent outing, and to the branch for putting on such a day trip. I’ve now acquired my latest piece of kit, a geological hammer, so I’m all set for the next one.

[uk-fossils]

Plagiostoma gigantea Fossil Bivalve – Lower Lias, Jurassic – Blockley, UK

Plagiostoma gigantea Fossil Bivalve – Lower Lias, Jurassic – Blockley, UK

About the Fossil:

This well-preserved Plagiostoma gigantea fossil bivalve originates from the Lower Lias stage of the Early Jurassic period (~201-174 million years ago) and was discovered in Blockley, United Kingdom. Plagiostoma is an extinct genus of marine bivalves, known for its distinctive fan-shaped shell with radiating ribs, making it a highly recognizable and sought-after fossil.

These bivalves thrived in shallow Jurassic seas, where they lived attached to the seafloor, filtering nutrients from the water. The Lower Lias formation is world-renowned for its rich and diverse marine fossil deposits, containing ammonites, belemnites, and bivalves that provide a window into ancient marine ecosystems.

Geology & Formation:

Geological Age: Lower Lias, Early Jurassic (~201-174 million years ago)

Formation: Marine sedimentary deposits

Location: Blockley, UK

Preservation: Excellent fossilization with clearly defined shell structure and surface details

Why This Fossil?

✔ 100% Genuine Specimen – Comes with a Certificate of Authenticity

✔ Highly Collectible – From the renowned Alice Purnell Collection

✔ Perfect for Display or Study – Ideal for fossil collectors, students, and paleontology enthusiasts

✔ Scale Rule/Cube = 1cm – See photos for full sizing

The fossil in the photo is the exact specimen you will receive!

Secure Packaging & Fast Shipping – Your fossil will be carefully packed for a safe journey!

[uk-fossils]

Pleuromya costata Fossil Bivalve - Lower Lias, Jurassic, Gloucestershire, UK - Genuine Prehistoric Fossil

This is a genuine fossil specimen of Pleuromya costata, an extinct species of bivalve, discovered in the Lower Lias deposits of Gloucestershire, UK. Dating back to the Early Jurassic period (~200-180 million years ago), this bivalve lived in shallow marine environments that were rich in prehistoric marine life, including ammonites, belemnites, and early marine reptiles.

The fossil is well-preserved, showcasing the characteristic elongated shape and ribbed shell structure of Pleuromya costata. Fossils from the Lower Lias Formation provide vital insights into the marine biodiversity and sedimentary environments of the Jurassic period.

Key Features:

Species: Pleuromya costata (Prehistoric Bivalve)

Fossil Type: Bivalve Shell

Age: Early Jurassic (~200-180 million years old)

Formation: Lower Lias

Location: Gloucestershire, UK

Condition: Well-preserved, showcasing detailed shell structure and surface features

Authenticity: 100% genuine fossil, supplied with a Certificate of Authenticity

Photo: The item in the listing is the exact specimen you will receive

Pleuromya costata was a filter-feeding bivalve that thrived in Jurassic seas, playing an important role in ancient marine ecosystems. These fossils are highly collectible due to their scientific significance and their connection to the diverse marine life of the Jurassic period.

This fossil is an excellent addition to any fossil collection, natural history display, or educational exhibit. It also makes a fantastic gift for fossil enthusiasts, geologists, and those fascinated by prehistoric marine environments.

Additional Information:

Scale cube = 1cm for size reference. Please see listing photos for full dimensions.

This is a carefully selected, high-quality specimen.

Ships securely packaged to ensure safe arrival.

All of our Fossils are 100% Genuine Specimens & come with a Certificate of Authenticity

Fast & Secure Shipping – We take great care in packaging each fossil to ensure it arrives in perfect condition!

Own a rare and scientifically significant piece of prehistoric history – add this Pleuromya costata Fossil Bivalve from the Jurassic, Gloucestershire, UK to your collection today!

[uk-fossils]

Rare Cardita listeri Fossil Bivalve – Middle Lias, Lower Sinemurian, Jurassic, UK | Authentic Specimen

Rare Cardita listeri Fossil Bivalve – Lower Sinemurian Stage, Jurassic Period – Blockley, United Kingdom

This listing features a rare Cardita listeri fossil bivalve from the Lower Sinemurian stage of the Jurassic period, discovered in the Middle Lias Formation at Blockley, United Kingdom. This well-preserved specimen highlights the distinct ridged shell structure that characterizes the Cardita genus.

About Cardita listeri:

Cardita listeri is an extinct species of marine bivalve that thrived in the shallow seas during the Jurassic period. Known for its thick, robust shell with pronounced radial ribs, Cardita listeri was a burrowing filter feeder, playing a vital role in ancient marine ecosystems. Its durable shell allowed it to withstand dynamic marine conditions, making it a common find in certain fossil beds.

Geological Context:

Formation: Middle Lias

Age: Lower Sinemurian, Jurassic (~199 – 190 million years ago)

Location: Blockley, United Kingdom

The Middle Lias Formation is renowned for its rich marine fossil deposits, preserving a variety of life forms such as ammonites, belemnites, gastropods, and bivalves like Cardita listeri. The Lower Sinemurian period marks a time of abundant shallow seas, ideal for marine biodiversity.

Fossil Details:

100% Genuine Cardita listeri Fossil Bivalve

Age: Lower Sinemurian, Jurassic (~199 – 190 million years ago)

Origin: Blockley, United Kingdom

Thick, Ribbed Shell Structure with Natural Detailing

Scale Rule Squares/Cube = 1cm (Please refer to photos for full sizing)

Comes with a Certificate of Authenticity

From the prestigious Alice Purnell Collection, one of the world’s largest ammonite and marine fossil collections

Why This Specimen is Special:

Rare Jurassic Bivalve Fossil from the UK

Detailed ribbed shell in excellent preservation

Ideal for Collectors, Museums, or Educational Displays

Carefully selected for its geological and historical significance

A unique addition to any fossil or natural history collection

This Cardita listeri fossil bivalve offers a glimpse into Earth’s prehistoric marine environments and is perfect for fossil enthusiasts, educators, and collectors.

📦 Fast & Secure Shipping 🛡️ 100% Authenticity Guaranteed 💎 A Premium Collector’s Fossil Specimen

Add this remarkable piece of Jurassic marine history to your collection today!

[uk-fossils]

Rare Cardita listeri Fossil Bivalve – Middle Lias, Lower Sinemurian, Jurassic, UK | Authentic Specimen

Rare Cardita listeri Fossil Bivalve – Lower Sinemurian Stage, Jurassic Period – Blockley, United Kingdom

This listing features a rare Cardita listeri fossil bivalve from the Lower Sinemurian stage of the Jurassic period, discovered in the Middle Lias Formation at Blockley, United Kingdom. This well-preserved specimen highlights the distinct ridged shell structure that characterizes the Cardita genus.

About Cardita listeri:

Cardita listeri is an extinct species of marine bivalve that thrived in the shallow seas during the Jurassic period. Known for its thick, robust shell with pronounced radial ribs, Cardita listeri was a burrowing filter feeder, playing a vital role in ancient marine ecosystems. Its durable shell allowed it to withstand dynamic marine conditions, making it a common find in certain fossil beds.

Geological Context:

Formation: Middle Lias

Age: Lower Sinemurian, Jurassic (~199 – 190 million years ago)

Location: Blockley, United Kingdom

The Middle Lias Formation is renowned for its rich marine fossil deposits, preserving a variety of life forms such as ammonites, belemnites, gastropods, and bivalves like Cardita listeri. The Lower Sinemurian period marks a time of abundant shallow seas, ideal for marine biodiversity.

Fossil Details:

100% Genuine Cardita listeri Fossil Bivalve

Age: Lower Sinemurian, Jurassic (~199 – 190 million years ago)

Origin: Blockley, United Kingdom

Thick, Ribbed Shell Structure with Natural Detailing

Scale Rule Squares/Cube = 1cm (Please refer to photos for full sizing)

Comes with a Certificate of Authenticity

From the prestigious Alice Purnell Collection, one of the world’s largest ammonite and marine fossil collections

Why This Specimen is Special:

Rare Jurassic Bivalve Fossil from the UK

Detailed ribbed shell in excellent preservation

Ideal for Collectors, Museums, or Educational Displays

Carefully selected for its geological and historical significance

A unique addition to any fossil or natural history collection

This Cardita listeri fossil bivalve offers a glimpse into Earth’s prehistoric marine environments and is perfect for fossil enthusiasts, educators, and collectors.

📦 Fast & Secure Shipping 🛡️ 100% Authenticity Guaranteed 💎 A Premium Collector’s Fossil Specimen

Add this remarkable piece of Jurassic marine history to your collection today!

[uk-fossils]

Rare Pleuromya costata Fossil Bivalve – Middle Lias, Lower Sinemurian, Jurassic, UK | Authentic Specimen

Rare Pleuromya costata Fossil Bivalve – Lower Sinemurian Stage, Jurassic Period – Blockley, United Kingdom

This listing features a rare Pleuromya costata fossil bivalve from the Lower Sinemurian stage of the Jurassic period, discovered in the Middle Lias Formation at Blockley, United Kingdom. This well-preserved specimen showcases the distinctive ribbed shell structure characteristic of the Pleuromya genus.

About Pleuromya costata:

Pleuromya costata is an extinct species of marine bivalve that inhabited shallow seas during the Jurassic period. Recognized for its elongated, ribbed shell and streamlined form, Pleuromya costata was adapted for life partially buried in soft seafloor sediments. As a filter feeder, it played a key role in the ancient marine ecosystem.

Geological Context:

Formation: Middle Lias

Age: Lower Sinemurian, Jurassic (~199 – 190 million years ago)

Location: Blockley, United Kingdom

The Middle Lias Formation is a renowned fossil-bearing deposit, known for its rich marine life, including ammonites, belemnites, gastropods, and bivalves like Pleuromya. The Lower Sinemurian stage marks a time when shallow seas flourished with diverse marine organisms, now preserved in sedimentary rock layers.

Fossil Details:

100% Genuine Pleuromya costata Fossil Bivalve

Age: Lower Sinemurian, Jurassic (~199 – 190 million years ago)

Origin: Blockley, United Kingdom

Elongated Shell with Prominent Ribbing

Scale Rule Squares/Cube = 1cm (Please see photos for full sizing)

Comes with a Certificate of Authenticity

From the renowned Alice Purnell Collection, one of the world’s largest ammonite and marine fossil collections

Why This Specimen is Special:

Rare Jurassic Bivalve Fossil from the UK

Well-preserved ribbed shell structure

Ideal for Collectors, Museums, or Educational Displays

Carefully selected for its scientific and historical significance

A valuable addition to any fossil or natural history collection

This Pleuromya costata fossil bivalve offers a remarkable glimpse into Earth’s ancient marine ecosystems and is perfect for fossil enthusiasts, educators, and collectors.

📦 Fast & Secure Shipping 🛡️ 100% Authenticity Guaranteed 💎 A Premium Collector’s Fossil Specimen

Add this exceptional piece of Jurassic marine history to your collection today!

[uk-fossils]

Rare Pleuromya uniformis Fossil Bivalve – Middle Lias, Lower Sinemurian, Jurassic, UK | Authentic Specimen

Rare Pleuromya uniformis Fossil Bivalve – Lower Sinemurian Stage, Jurassic Period – Blockley, United Kingdom

This listing features a rare Pleuromya uniformis fossil bivalve from the Lower Sinemurian stage of the Jurassic period, found in the Middle Lias Formation at Blockley, United Kingdom. This genuine specimen showcases the elongated shell structure and fine preservation typical of the Pleuromya genus.

About Pleuromya uniformis:

Pleuromya uniformis is an extinct species of marine bivalve that thrived in shallow seas during the Jurassic period. Known for its elongated, symmetrical shell and subtle growth lines, Pleuromya was a sediment-dwelling filter feeder that played a significant role in Jurassic marine ecosystems. Its streamlined form made it well-suited for life buried within soft seafloor sediments.

Geological Context:

Formation: Middle Lias

Age: Lower Sinemurian, Jurassic (~199 – 190 million years ago)

Location: Blockley, United Kingdom

The Middle Lias Formation is renowned for its rich fossil record, preserving a variety of marine life including ammonites, belemnites, gastropods, and bivalves like Pleuromya. The Lower Sinemurian stage represents a time of extensive shallow seas, ideal for the proliferation of marine invertebrates.

Fossil Details:

100% Genuine Pleuromya uniformis Fossil Bivalve

Age: Lower Sinemurian, Jurassic (~199 – 190 million years ago)

Origin: Blockley, United Kingdom

Elongated Shell with Fine Growth Lines

Scale Rule Squares/Cube = 1cm (Please refer to photos for full sizing)

Comes with a Certificate of Authenticity

From the prestigious Alice Purnell Collection, one of the world’s largest ammonite and marine fossil collections

Why This Specimen is Special:

Rare Jurassic Bivalve Fossil from the UK

Excellent preservation showcasing natural shell features

Ideal for Collectors, Museums, or Educational Displays

Carefully selected for its scientific and historical significance

A valuable addition to any fossil or natural history collection

This Pleuromya uniformis fossil bivalve offers a fascinating glimpse into ancient marine ecosystems and is perfect for fossil enthusiasts, educators, and collectors.

📦 Fast & Secure Shipping 🛡️ 100% Authenticity Guaranteed 💎 A Premium Collector’s Fossil Specimen

Add this incredible piece of Jurassic marine history to your collection today!

[uk-fossils]

Rare Inoceramus sp Fossil Bivalve – Middle Lias, Lower Sinemurian, Jurassic, UK | Authentic Specimen

Rare Inoceramus sp Fossil Bivalve – Lower Sinemurian Stage, Jurassic Period – Blockley, United Kingdom

This listing features a rare Inoceramus sp fossil bivalve from the Lower Sinemurian stage of the Jurassic period, found in the Middle Lias Formation at Blockley, United Kingdom. This authentic specimen displays the characteristic robust shell structure of the Inoceramus genus, making it a striking addition to any fossil collection.

About Inoceramus sp:

Inoceramus is a genus of extinct marine bivalves that thrived in the seas of the Jurassic and Cretaceous periods. Known for their thick, ridged shells and large size, Inoceramus species were filter feeders that played a crucial role in ancient marine ecosystems. Their distinct shell morphology and widespread distribution make them important index fossils for dating sedimentary rock layers.

Geological Context:

Formation: Middle Lias

Age: Lower Sinemurian, Jurassic (~199 – 190 million years ago)

Location: Blockley, United Kingdom

The Middle Lias Formation is known for its rich marine fossil deposits, including ammonites, belemnites, and bivalves like Inoceramus. The Lower Sinemurian stage was marked by shallow seas that provided ideal conditions for the preservation of marine life.

Fossil Details:

100% Genuine Inoceramus sp Fossil Bivalve

Age: Lower Sinemurian, Jurassic (~199 – 190 million years ago)

Origin: Blockley, United Kingdom

Robust Shell Structure with Natural Detailing

Scale Rule Squares/Cube = 1cm (Please see photos for full sizing)

Comes with a Certificate of Authenticity

From the esteemed Alice Purnell Collection, one of the world’s largest ammonite and marine fossil collections

Why This Specimen is Special:

Rare Jurassic Bivalve Fossil from the UK

Excellent preservation with clear shell features

Ideal for Collectors, Museums, or Educational Displays

Carefully selected for its scientific and historical value

A valuable addition to any fossil or natural history collection

This Inoceramus sp fossil bivalve provides a fascinating look into Earth’s ancient marine ecosystems and is perfect for fossil enthusiasts, educators, and collectors.

📦 Fast & Secure Shipping 🛡️ 100% Authenticity Guaranteed 💎 A Premium Collector’s Fossil Specimen

Don’t miss the opportunity to own this remarkable piece of Jurassic marine history!

[uk-fossils]

Rare Inoceramus sp Fossil Bivalve – Middle Lias, Lower Sinemurian, Jurassic, UK | Authentic Specimen

Rare Inoceramus sp Fossil Bivalve – Lower Sinemurian Stage, Jurassic Period – Blockley, United Kingdom

This listing features a rare Inoceramus sp fossil bivalve from the Lower Sinemurian stage of the Jurassic period, found in the Middle Lias Formation at Blockley, United Kingdom. This authentic specimen displays the characteristic robust shell structure of the Inoceramus genus, making it a striking addition to any fossil collection.

About Inoceramus sp:

Inoceramus is a genus of extinct marine bivalves that thrived in the seas of the Jurassic and Cretaceous periods. Known for their thick, ridged shells and large size, Inoceramus species were filter feeders that played a crucial role in ancient marine ecosystems. Their distinct shell morphology and widespread distribution make them important index fossils for dating sedimentary rock layers.

Geological Context:

Formation: Middle Lias

Age: Lower Sinemurian, Jurassic (~199 – 190 million years ago)

Location: Blockley, United Kingdom

The Middle Lias Formation is known for its rich marine fossil deposits, including ammonites, belemnites, and bivalves like Inoceramus. The Lower Sinemurian stage was marked by shallow seas that provided ideal conditions for the preservation of marine life.

Fossil Details:

100% Genuine Inoceramus sp Fossil Bivalve

Age: Lower Sinemurian, Jurassic (~199 – 190 million years ago)

Origin: Blockley, United Kingdom

Robust Shell Structure with Natural Detailing

Scale Rule Squares/Cube = 1cm (Please see photos for full sizing)

Comes with a Certificate of Authenticity

From the esteemed Alice Purnell Collection, one of the world’s largest ammonite and marine fossil collections

Why This Specimen is Special:

Rare Jurassic Bivalve Fossil from the UK

Excellent preservation with clear shell features

Ideal for Collectors, Museums, or Educational Displays

Carefully selected for its scientific and historical value

A valuable addition to any fossil or natural history collection

This Inoceramus sp fossil bivalve provides a fascinating look into Earth’s ancient marine ecosystems and is perfect for fossil enthusiasts, educators, and collectors.

📦 Fast & Secure Shipping 🛡️ 100% Authenticity Guaranteed 💎 A Premium Collector’s Fossil Specimen

Don’t miss the opportunity to own this remarkable piece of Jurassic marine history!