Inoceramus

Inoceramus hobetsensis, photographed by Daderot.

Belongs within: Pterioida.

Inoceramus is a diverse genus of pteriomorph molluscs known from the Jurassic and Cretaceous periods.

Characters (from Cox et al. 1969): Subequivalve to strongly inequivalve, ovate, trapeziform or suborbicular; posterior wing variably developed; ligamental area concave transversely; radial ornament rarely present; outer ostracum occasionally very thick.

<==Inoceramus Smith 1816B59
    |--I. involutus [=*I. cuvieri (preoc.)]B59
    |--I. adgjakendensisK79
    |--I. amakusensisK79
    |--I. anglicusK79
    |    |--I. a. anglicusK79
    |    |--I. a. conjugalisK79
    |    `--I. a. elongatusK79
    |--I. apicalisK79
    |--I. arvanusK79
    |--I. athabaskensisK79
    |--I. aucellaK79
    |--I. awajiensisK79
    |--I. azerbaidjanensisK79
    |--I. balchiiK79
    |--I. barabini Morton 1834 [incl. I. crispii Conrad 1857]W77
    |--I. bellvuensisK79
    |--I. browniK79
    |--I. carsoniRC02
    |--I. colonicusK79
    |--I. comancheanusK79
    |--I. concentricusK79
    |    |--I. c. concentricusK79
    |    |--I. c. costatusK79
    |    `--I. c. nipponicusK79
    |--I. convexusK79
    |--I. costellatusK79
    |--I. crassalatus White 1877W77
    |--I. crassusK79
    |--I. crippsiK79
    |--I. deformis Meek 1872W77
    |--I. dimidius White 1874W77
    |--I. dubiusM79
    |--I. dunveganensisK79
    |--I. elegansK79
    |    |--I. e. elegansK79
    |    `--I. e. pseudosulcatusK79
    |--I. erectusK79
    |--I. ernstiK79
    |--I. eulessanusK79
    |--I. fasciculatusK79
    |--I. flaccidus White 1877W77
    |--I. flavusK79
    |--I. fragilis Hall & Meek 1856W77
    |--I. furnivaliK79
    |--I. ginterensisK79
    |--I. hetonaianusK79
    |--I. hobetsensisK79
    |--I. howelliK79
    |--I. humboldtiK79
    |--I. inaequivalvisK79
    |--I. japonicusK79
    |--I. kedrovensisK79
    |--I. kleiniK79
    |--I. kusiroensisK79
    |--I. labiatiformisK79
    |--I. lamarckiK79
    |--I. macconnelliK79
    |--I. maclearniK79
    |--I. madagascariensisRC02
    |--I. mihoensisK79
    |--I. mukawaensisK79
    |--I. nahwisiK79
    |--I. naumanni [=Sphenoceramus naumanni]K79
    |--I. nebrascensisK79
    |--I. oblongusK79
    |--I. opetius Wellman 1959S98
    |--I. orientalis [=Sphenoceramus orientalis]K79
    |--I. ovatoidesK79
    |--I. pennatulusK79
    |--I. perplexusK79
    |--I. pertenuisK79
    |--I. pictusRC02
    |    |--I. p. pictusK79
    |    `--I. p. etheridgeiK79
    |--I. prefragilisK79
    |--I. problematicus (Schlotheim 1820) (see below for synonymy)W77
    |--I. quadransK79
    |--I. reachensisK79
    |--I. redbirdensisK79
    |--I. reduncusK79
    |--I. rotundatusK79
    |--I. rutherfordiK79
    |--I. sagensisK79
    |--I. schloenbachiK79
    |--I. schmidti [=Sphenoceramus schmidti]K79
    |--I. securiformisK79
    |--I. serotinusK79
    |--I. shikotaensisK79
    |--I. simpsoniK79
    |--I. stantoniK79
    |--I. subcompressusK79
    |--I. subundatusK79
    |--I. sutherlandiRC02
    |--I. tenuilineatusK79
    |--I. tenuisK79
    |--I. tenuiumbonatusK79
    |--I. teshioensisK79
    |--I. typicusK79
    |--I. uwajimensisK79
    |    |--I. u. uwajimensisK79
    |    `--I. u. yeharaiK79
    |--I. vanuxemiK79
    |--I. waltersdorfensisK79
    |    |--I. w. waltersdorfensisK79
    |    `--I. w. hannovrensisK79
    |--I. yabaiK79
    |--I. yokoyamaiK79
    `--I. yubariensisK79

Inoceramus problematicus (Schlotheim 1820) [=Mytilus problematicus; incl. M. labiatus Brongniart 1822, Inoceratus mytiloides Goldfuss 1836]W77

*Type species of generic name indicated

References

[B59] Boreham, A. U. E. 1959. Cretaceous fossils from the Chatham Islands. Transactions of the Royal Society of New Zealand 86 (1): 119–125.

Cox, L. R., N. D. Newell et al. 1969. Treatise on Invertebrate Paleontology pt N. Bivalvia vol. 1. The Geological Society of America, Inc. and The University of Kansas.

[K79] Kauffman, E. G. 1979. Cretaceous. In: Robison, R. A., & C. Teichert (eds) Treatise on Invertebrate Paleontology pt A. Introduction. Fossilisation (Taphonomy), Biogeography and Biostratigraphy pp. A418–A487. The Geological Society of America, Inc.: Boulder (Colorado), and The University of Kansas: Lawrence (Kansas).

[M79] Müller, A. H. 1979. Fossilization (taphonomy). In: Robison, R. A., & C. Teichert (eds) Treatise on Invertebrate Paleontology pt A. Introduction. Fossilisation (Taphonomy), Biogeography and Biostratigraphy pp. A2–A78. The Geological Society of America, Inc.: Boulder (Colorado), and The University of Kansas: Lawrence (Kansas).

[RC02] Riding, J. B., & J. A. Crame. 2002. Aptian to Coniacian (Early–Late Cretaceous) palynostratigraphy of the Gustav Group, James Ross Basin, Antarctica. Cretaceous Research 23: 739–760.

[S98] Stilwell, J. D. 1998. Late Cretaceous Mollusca from the Chatham Islands, New Zealand. Alcheringa 22 (1): 29–85.

[W77] White, C. A. 1877. Report upon the invertebrate fossils collected in portions of Nevada, Utah, Colorado, New Mexico, and Arizona, by parties of the expeditions of 1871, 1872, 1873, and 1874. U.S. Geographical Surveys West of the One Hundredth Meridian 4 (1): 1–219, pls 1–21.

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