Coelodiscus

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Coelodiscus
Temporal range: Pliensbachian-Aalenian
~188–170  Ma
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Caenogastropoda
Order: Littorinimorpha
Family:† Coelodiscidae
Gründel & Nützel, 2013
Genus:† Coelodiscus
Broesamlen, 1909
Species
  • Coelodiscus minutus
  • Coelodiscus biumbilicatus
  • Coelodiscus fluegeli
  • Coelodiscus wrightianus

Ceolodiscus is an extinct genus of gastropod from the Lower and Middle Jurassic of Europe, mostly on Germany, France and United Kingdom. [1] [2] [3] Other posible records include specimens from Hungary of Earliest Jurassic (Hettangian) age. [4] As well there are specimens from Switzerland of Middle Jurassic age. [5] It is the only genus in the monotypic family Coelodiscidae. [6] The genus is usually allied with modern Pterotracheoidea, based mostly on its resemblance with modern Atlanta larvae, yet it differs by lacking extant family affiliations. [7] This genus is linked with the Toarcian Oceanic Anoxic Event, that likely triggered its evolution. [1]

The shell is small but stocky; involute or with a slightly protruding spire. Whorls are generally smooth, evenly rounded and slightly overlapping; umbilicus deep, aperture ovate. [1] Is the oldest known holoplanktonic gastropod, thanks to a bilateral symmetrical shells as an adaption to active swimming. Beyond the most common of the sea snails of the Posidonienschiefer Formation, it is also one of the most varied in size terms. [1] It has been related to large floating driftwood as one of the primary settlers. [1]

Related Research Articles

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

Gastropods, commonly known as slugs and snails, belong to a large taxonomic class of invertebrates within the phylum Mollusca called Gastropoda.

<i>Limacina</i> Genus of gastropods

Limacina is a genus of swimming predatory sea snails commonly known as sea butterflies in the family Limacinidae. This genus contains some of the world's most abundant gastropod species.

<span class="mw-page-title-main">Viviparidae</span> Family of gastropods

Viviparidae, sometimes known as the river snails or mystery snails, are a family of large aquatic gastropod mollusks, being some of the most widely distributed operculate freshwater snails.

<span class="mw-page-title-main">Atlantidae</span> Family of gastropods

Atlantidae is a family of sea snails, holoplanktonic gastropod molluscs in the clade Littorinimorpha.

<i>Atlanta</i> (gastropod) Genus of gastropods

Atlanta is a genus of pelagic marine gastropod molluscs in the family Atlantidae. They are sometimes called heteropods.

<span class="mw-page-title-main">Helcionelloida</span> Extinct class of molluscs

Helcionelloida is an extinct group of ancient molluscs. These are the oldest known conchiferan molluscs, that is, they had a mineralised shell. Some members of this class were mistaken for Monoplacophorans. The class was erected by Peel in 1991.

<span class="mw-page-title-main">Pterotracheoidea</span> Superfamily of molluscs

The Pterotracheoidea is, according to the Taxonomy of the Gastropoda, a taxonomic superfamily of sea snails or sea slugs, marine gastropod molluscs in the clade Littorinimorpha. They are commonly called heteropods or sea elephants.

<span class="mw-page-title-main">Schistes bitumineux</span>

The Schistes bitumineux is an Early Jurassic geologic formation in Bascharage, Luxembourg that is located within an oil shale, hence the name.

The cephalopods have a long geological history, with the first nautiloids found in late Cambrian strata.

<i>Atlanta echinogyra</i> Species of gastropod

Atlanta echinogyra is a species of sea snail, a holoplanktonic marine gastropod mollusk in the family Atlantidae.

<i>Atlanta lesueurii</i> Species of gastropod

Atlanta lesueurii is a species of sea snail, a holoplanktonic marine gastropod mollusk in the family Atlantidae.

<i>Oxygyrus</i> Genus of gastropods

Oxygyrus keraudrenii is a species of sea snail, a holoplanktonic marine gastropod mollusk in the family Atlantidae.

<i>Protatlanta souleyeti</i> Species of gastropod

Protatlanta souleyeti is a species of sea snail, a holoplanktonic marine gastropod mollusk in the family Atlantidae.

This list, 2013 in molluscan paleontology, is a list of new taxa of ammonites and other fossil cephalopods, as well as fossil gastropods, bivalves and other molluscs that have been described during the year 2013.

This list, 2016 in molluscan paleontology, is a list of new taxa of ammonites and other fossil cephalopods, as well as fossil gastropods, bivalves and other molluscs that have been described during the year 2016.

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This list of fossil molluscs described in 2021 is a list of new taxa of fossil molluscs that were described during the year 2021, as well as other significant discoveries and events related to molluscan paleontology that occurred in 2021.

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References

  1. 1 2 3 4 5 Teichert, Sebastian; Nützel, Alexander (2015). "Early Jurassic anoxia triggered the evolution of the oldest holoplanktonic gastropod Coelodiscus minutus by means of heterochrony". Acta Palaeontologica Polonica. doi:10.4202/app.00145.2014. ISSN   0567-7920.
  2. ↑ Bandel, Klaus; Hemleben, Christoph (1987-02-11). "Jurassic Heteropods and their Modern Counterparts (Planktonic Gastropoda, Mollusca)". Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen. 174 (1): 1–22. doi:10.1127/njgpa/174/1987/1. ISSN   0077-7749.
  3. ↑ Schulbert, C.; Nuetzel, A. (2013). "Gastropods from the Early/Middle Jurassic transition of Franconia (Southern Germany)" (PDF). Bulletin of Geosciences. 88 (4): 723–778.
  4. ↑ Szente, I. (1992). "Early Jurassic Molluscs from the Mecsek Mountains (S. Hungary. A preliminary study" (PDF). Annales Univ. Budapest. Sectio Geologica. 29 (1): 324–343.
  5. ↑ Etter, Walter (1996). "Pseudoplanktonic and benthic invertebrates in the Middle Jurassic Opalinum Clay, northern Switzerland". Palaeogeography, Palaeoclimatology, Palaeoecology. 126 (3–4): 325–341. doi:10.1016/s0031-0182(96)00036-3. ISSN   0031-0182.
  6. ↑ "Coelodiscidae". WoRMS. World Register of Marine Species . Retrieved 19 November 2024.
  7. ↑ Wall-Palmer, Deborah; Janssen, Arie W; Goetze, Erica; Choo, Le Qin; Mekkes, Lisette; Peijnenburg, Katja T. C. A. (2020-03-21). "Fossil-calibrated molecular phylogeny of atlantid heteropods (Gastropoda, Pterotracheoidea)". dx.doi.org. Retrieved 2024-11-20.


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