Liostrea

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Liostrea
Temporal range: 252–94  Ma
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Bivalvia
Order: Ostreida
Family: Gryphaeidae
Subfamily: Gryphaeinae
Genus: Liostrea
Douvillé, 1904

Liostrea is a genus of extinct oysters, marine bivalve mollusks in the family Gryphaeidae. [1]

These fossils range from the early Triassic Period [2] to the Cenomanian Epoch of the late Cretaceous Period and were widely distributed geographically. They were encrusting organisms, attaching firmly to the substrate on their left shell, and were important Jurassic reef-forming organisms. The species L. erina [3] and L. roemeri [4] attached themselves to living ammonoids.

Liostrea formed abundant ostreoliths (concretions composed of encrusting organisms) on the hardgrounds of the Jurassic Carmel Formation in southwestern Utah. [5]

Liostrea may be the earliest oyster lineage, with possible examples attached to ammonoids of the earliest Triassic. This suggests oysters emerged and rapidly diversified in the wake of the Permian-Triassic extinction event. [2]

Selected species

Related Research Articles

<span class="mw-page-title-main">Bivalvia</span> Class of molluscs

Bivalvia, in previous centuries referred to as the Lamellibranchiata and Pelecypoda, is a class of marine and freshwater molluscs that have laterally compressed bodies enclosed by a shell consisting of two hinged parts. As a group, bivalves have no head and they lack some usual molluscan organs, like the radula and the odontophore. The class includes the clams, oysters, cockles, mussels, scallops, and numerous other families that live in saltwater, as well as a number of families that live in freshwater. The majority are filter feeders. The gills have evolved into ctenidia, specialised organs for feeding and breathing. Most bivalves bury themselves in sediment, where they are relatively safe from predation. Others lie on the sea floor or attach themselves to rocks or other hard surfaces. Some bivalves, such as the scallops and file shells, can swim. The shipworms bore into wood, clay, or stone and live inside these substances.

The Early Jurassic Epoch is the earliest of three epochs of the Jurassic Period. The Early Jurassic starts immediately after the Triassic–Jurassic extinction event, 201.3 Ma, and ends at the start of the Middle Jurassic 174.7 ±0.8 Ma.

The Late Triassic is the third and final epoch of the Triassic Period in the geologic time scale, spanning the time between 237 Ma and 201.4 Ma. It is preceded by the Middle Triassic Epoch and followed by the Early Jurassic Epoch. The corresponding series of rock beds is known as the Upper Triassic. The Late Triassic is divided into the Carnian, Norian and Rhaetian ages.

<span class="mw-page-title-main">Carmel Formation</span> Geological formation in Utah, USA

The Carmel Formation is a geologic formation in the San Rafael Group that is spread across the U.S. states of Wyoming, Utah, Colorado, north east Arizona and New Mexico. Part of the Colorado Plateau, this formation was laid down in the Middle Jurassic during the late Bajocian, through the Bathonian and into the early Callovian stages.

<span class="mw-page-title-main">Pteriida</span> Order of bivalves

The Pteriida are an order of large and medium-sized marine bivalve mollusks. It includes five families, among them the Pteriidae.

<i>Daonella</i> Genus of bivalves

Daonella is a genus of oyster-like saltwater clams, marine bivalve mollusks which lived in the middle to late Triassic period. They are related to the genera Aparimella and Halobia. Since they were ubiquitous in the Arctic, Tethys and Panthalassa seas, they are frequently used as index fossils in dating rocks to the Triassic period. However, the systematic classification of the Daonella is still an area of ongoing research.

<span class="mw-page-title-main">Gryphaeidae</span> Family of bivalves

The Gryphaeidae, common name the foam oysters or honeycomb oysters, are a family of marine bivalve mollusks. This family of bivalves is very well represented in the fossil record, however the number of living species is very few.

<span class="mw-page-title-main">Carbonate hardgrounds</span>

Carbonate hardgrounds are surfaces of synsedimentarily cemented carbonate layers that have been exposed on the seafloor. A hardground is essentially, then, a lithified seafloor. Ancient hardgrounds are found in limestone sequences and distinguished from later-lithified sediments by evidence of exposure to normal marine waters. This evidence can consist of encrusting marine organisms, borings of organisms produced through bioerosion, early marine calcite cements, or extensive surfaces mineralized by iron oxides or calcium phosphates. Modern hardgrounds are usually detected by sounding in shallow water or through remote sensing techniques like side-scan sonar.

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This list of fossil molluscs described in 2023 is a list of new taxa of fossil molluscs that were described during the year 2023, as well as other significant discoveries and events related to molluscan paleontology that occurred in 2023.

References

  1. Vokes, Harold E. (1980). Genera of the Bivalvia: A Systematic and Bibliographic Catalogue. Paleontological Research Institute. ISBN   978-0877103783.
  2. 1 2 Hautmann, Michael; Ware, David; Bucher, Hugo (1 August 2017). "Geologically oldest oysters were epizoans on Early Triassic ammonoids". Journal of Molluscan Studies. 83 (3): 253–260. doi: 10.1093/mollus/eyx018 .
  3. 1 2 3 4 Ros-Franch, S.; Márquez-Aliaga, A.; Damborenea, S.E. (10 April 2014). "Comprehensive database on Induan (Lower Triassic) to Sinemurian (Lower Jurassic) marine bivalve genera and their paleobiogeographic record". Paleontological Contributions. 8: 1–219. doi:10.17161/PC.1808.13433. S2CID   82595160.
  4. 1 2 Zell, Patrick; Beckmann, Seija; Stinnesbeck, Wolfgang (September 2014). "Liostrea roemeri (Ostreida, Bivalvia) attached to Upper Jurassic ammonites of northeastern Mexico". Palaeobiodiversity and Palaeoenvironments. 94 (3): 439–451. doi:10.1007/s12549-014-0154-z. S2CID   140573059.
  5. Wilson, Mark A.; Ozanne, Colin R.; Palmer, Timothy J. (February 1998). "Origin and Paleoecology of Free-Rolling Oyster Accumulations (Ostreoliths) in the Middle Jurassic of Southwestern Utah, USA". PALAIOS. 13 (1): 70. Bibcode:1998Palai..13...70W. doi:10.2307/3515282. JSTOR   3515282.
  6. 1 2 Ivanov, AV (1 Jan 2001). "New oysters of the genus Liostrea from the Santonian of the Lower Volga Region". Paleontologicheskii Zhurnal. 35 (1): 16–17. ISSN   0031-031X.