Texigryphaea

<i>Texigryphaea</i>

Texigryphaea

Extinct genus of oyster

Texigryphaea is an extinct genus of oyster belonging to the order Ostreida and family Gryphaeidae.[3] It dates to the Albian to Cenomanian Ages of the Cretaceous period and is primarily found in Texas and the southern Western Interior of North America.[1] However, specimens have been identified from northern Spain.[4]

Quick Facts Scientific classification, Species ...

The genus were free-living benthic oysters that were often the dominant species in late Albian biomes of the Western Interior Seaway.[1] Some limestone beds of the Muleros Formation near El Paso, Texas, consist almost entirely of fossil fragments of T. washitaensis.[2] Most species preferred soft substrates in quiet environments, but T. navia was adapted to firmer substrates in more energetic environments.[1] The genus differs from Jurassic Gryphaeidae in possessing a vesicular shell structure and chomata (a fine set of parallel ribs found on the inner valves).[4]

T. tucumcarii is considered to be a synonym for T. pitcheri.[1]

Selected species

  • Texigryphaea belvederensis (Hill & Vaughan 1898)
  • Texigryphaea corrugata (Say, 1823)
  • Texigryphaea gibberosa (Cragin, 1893)
  • Texigryphaea graysonana (Stanton, 1947)
  • Texigryphaea hilli (Cragin, 1891)
  • Texigryphaea marcoui (Hill and Vaughan, 1898)
  • Texigryphaea mucronata (Gabb, 1869)
  • Texigryphaea navia (Hall, 1856)
  • Texigryphaea pitcheri (Morton, 1834)
  • Texigryphaea roemeri (Marcou, 1862)
  • Texigryphaea washitaensis (Hill and Vaughan, 1898)

References

  1. [1]
    Kues, Barry S. (July 1989). "Taxonomy and variability of three Texigryphaea (Bivalvia) species from their Lower Cretaceous (Albian) type localities in New Mexico and Oklahoma". Journal of Paleontology. 63 (4): 454–483. Bibcode:1989JPal...63..454K. doi:10.1017/S0022336000019697.
  2. [2]
    Strain, W.S. (1976). "New formation names in the Cretaceous at Cerro de Cristo Rey, Dona Ana County, New Mexico; Appendix 2" (PDF). New Mexico Bureau of Mines and Mineral Resources Memoir. 31: 77–82. Retrieved 5 August 2020.
  3. [3]
    Cox, L.R. (1971). "Part N errata and revisions". In Moore, R.C. (ed.). Treatise on Invertebrate Paleontology, Part N, Mollusca 6, Bivalvia 3. Lawrence, KS: Geological Society of America and University of Kansas. pp. N1214–N1217.
  4. [4]
    Hallam, A.; Gould, S.J. (17 June 1975). "The evolution of British and American Middle and Upper Jurassic Gryphaea : a biometric study". Proceedings of the Royal Society of London. Series B. Biological Sciences. 189 (1097): 511–542. Bibcode:1975RSPSB.189..511H. doi:10.1098/rspb.1975.0071.


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