Inoceramus

Inoceramus hobetsensis, photographed by Daderot.

Belongs within: Pteriomorphia.

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 1816 B59
    |--I. involutus [=*I. cuvieri (preoc.)] B59
    |--I. adgjakendensis K79
    |--I. amakusensis K79
    |--I. anglicus K79
    |    |--I. a. anglicus K79
    |    |--I. a. conjugalis K79
    |    `--I. a. elongatus K79
    |--I. apicalis K79
    |--I. arvanus K79
    |--I. athabaskensis K79
    |--I. aucella K79
    |--I. awajiensis K79
    |--I. azerbaidjanensis K79
    |--I. balchii K79
    |--I. barabini Morton 1834 [incl. I. crispii Conrad 1857] W77
    |--I. bellvuensis K79
    |--I. browni K79
    |--I. carsoni RC02
    |--I. colonicus K79
    |--I. comancheanus K79
    |--I. concentricus K79
    |    |--I. c. concentricus K79
    |    |--I. c. costatus K79
    |    `--I. c. nipponicus K79
    |--I. convexus K79
    |--I. costellatus K79
    |--I. crassalatus White 1877 W77
    |--I. crassus K79
    |--I. crippsi K79
    |--I. deformis Meek 1872 W77
    |--I. dimidius White 1874 W77
    |--I. dubius M79
    |--I. dunveganensis K79
    |--I. elegans K79
    |    |--I. e. elegans K79
    |    `--I. e. pseudosulcatus K79
    |--I. erectus K79
    |--I. ernsti K79
    |--I. eulessanus K79
    |--I. fasciculatus K79
    |--I. flaccidus White 1877 W77
    |--I. flavus K79
    |--I. fragilis Hall & Meek 1856 W77
    |--I. furnivali K79
    |--I. ginterensis K79
    |--I. hetonaianus K79
    |--I. hobetsensis K79
    |--I. howelli K79
    |--I. humboldti K79
    |--I. inaequivalvis K79
    |--I. japonicus K79
    |--I. kedrovensis K79
    |--I. kleini K79
    |--I. kusiroensis K79
    |--I. labiatiformis K79
    |--I. lamarcki K79
    |--I. macconnelli K79
    |--I. maclearni K79
    |--I. madagascariensis RC02
    |--I. mihoensis K79
    |--I. mukawaensis K79
    |--I. nahwisi K79
    |--I. naumanni [=Sphenoceramus naumanni] K79
    |--I. nebrascensis K79
    |--I. oblongus K79
    |--I. opetius Wellman 1959 S98
    |--I. orientalis [=Sphenoceramus orientalis] K79
    |--I. ovatoides K79
    |--I. pennatulus K79
    |--I. perplexus K79
    |--I. pertenuis K79
    |--I. pictus RC02
    |    |--I. p. pictus K79
    |    `--I. p. etheridgei K79
    |--I. prefragilis K79
    |--I. problematicus (Schlotheim 1820) (see below for synonymy) W77
    |--I. quadrans K79
    |--I. reachensis K79
    |--I. redbirdensis K79
    |--I. reduncus K79
    |--I. rotundatus K79
    |--I. rutherfordi K79
    |--I. sagensis K79
    |--I. schloenbachi K79
    |--I. schmidti [=Sphenoceramus schmidti] K79
    |--I. securiformis K79
    |--I. serotinus K79
    |--I. shikotaensis K79
    |--I. simpsoni K79
    |--I. stantoni K79
    |--I. subcompressus K79
    |--I. subundatus K79
    |--I. sutherlandi RC02
    |--I. tenuilineatus K79
    |--I. tenuis K79
    |--I. tenuiumbonatus K79
    |--I. teshioensis K79
    |--I. typicus K79
    |--I. uwajimensis K79
    |    |--I. u. uwajimensis K79
    |    `--I. u. yeharai K79
    |--I. vanuxemi K79
    |--I. waltersdorfensis K79
    |    |--I. w. waltersdorfensis K79
    |    `--I. w. hannovrensis K79
    |--I. yabai K79
    |--I. yokoyamai K79
    `--I. yubariensis K79

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.