McMenamin, Mark A. S.; Zapata, Lesly P.; Hussey, Meghan C.
November 2013
Journal of Crustacean Biology;Nov2013, Vol. 33 Issue 6, p751
Academic Journal
A giant fossil amphipod Rosagammarus minichiellus n. gen., n. sp. occurs in a Triassic limestone (Luning Formation, west-central Nevada) in association with ichthyosaurs (Shonisaurus sp.) and the deep-water trace fossil Protopaleodictyon ichnosp. Fossil pereion and pereiopod morphology suggest affinities with Acanthogammaridae, a freshwater amphipod family largely endemic to Lake Baikal. The large size y (17 cm) of the Triassic amphipod shows that supergiant, deep marine amphipods comparable to modem Alicella giganlea Chevreux, 1899 were extant during the early Mesozoic. By analogy with A. gigantea, R. minichiellus was likely a necrophagous, benthopelagic scavenger that fed on ichthyosaur and other sea floor carcasses. Rosagammarus minichiellus appears to be the oldest known fossil amphipod, extending the known geological range of Amphipoda by at least 170 million years.


Related Articles

  • Coastal evolution of a cuspate foreland (Flakket, Anholt, Denmark) between 2006 and 2010. Clemmensen, Lars B.; Bendixen, Mette; Nielsen, Lars; Jensen, Sabrina; SchrØder, Louise // Bulletin of the Geological Society of Denmark;2011, Vol. 59, p37 

    Flakket is a cuspate marine foreland on the north coast of Anholt in the Kattegat sea. It is composed of a number of gravel-rich beach ridges typically covered by aeolian sand and intervening swales and wetlands including a relatively large lagoon. The most recent evolution of the coastline of...

  • Triassic park.  // Earthwatch: The Journal of Earthwatch Institute;Jan/Feb94, Vol. 13 Issue 1, p18 

    Describes the Earthwatch project led by Dr. William Sill and Prof. Alfredo Monetta (Universidad Nacional de San Juan), into dinosaur origins in the Ischigualasto Valley, west-central Argentina. EarthCorps teams hope to discover why, during the middle of the Triassic 220 million years ago, the...

  • Middle Devonian invertebrate trace fossils from the marginal marine carbonates of the ZacheÅ‚mie tetrapod tracksite, Holy Cross Mountains, Poland. NIEDŹWIEDZKI, GRZEGORZ; NARKIEWICZ, MAREK; SZREK, PIOTR // Bulletin of Geosciences;2014, Vol. 89 Issue 3, p593 

    The dolomitic deposits of the Middle Devonian Wojciechowice Formation exposed at the tetrapod tracksite in the Zachełmie Quarry in the Holy Cross Mountains (Poland) are characterised by a low diversity of invertebrate trace fossil association. Four ichnoassemblages can be identified in the...

  • Fish catch early flight to avoid predators.  // New Scientist;11/3/2012, Vol. 216 Issue 2889, p16 

    The article discusses a paper published in "Proceedings of the Royal Society B" by researcher Guang-Hui Xu and team on the discovery of flying fish fossils in southern China from the Middle Triassic period, noting that the previously oldest known flying fish fossils were dated to the Late Triassic.

  • Faunal turnover patterns in the Pliocene and Pleistocene of southern Africa. McKee, Jeffrey K. // South African Journal of Science;Mar96, Vol. 92 Issue 3, p111 

    Focuses on the compilation of identified late Pliocene and Pleistocene fossil fauna from the southern African subcontinent. Hypothesis of climatic causation; Fossil site units; Approximate ages; Approximate ages; Number of species sampled.

  • Gastropods from the Norian (Late Triassic) Nayband Formation near Natanz (Iran). Nützel, Alexander; Aghababalou, Babak; Senowbari-Daryan, Baba // Bulletin of Geosciences;2012, Vol. 87 Issue 1, p53 

    A collection of marine gastropods from the Late Triassic (Norian) Nayband Formation of Iran near Misfeasance consists of 207 specimens representing 9 species (3 species are new). Rarefaction analyses and diversity indices indicate that the diversity of the studied fauna is much lower than that...

  • The Triassic coleopteran fauna of southern South America: Morphometric variation of elytra, paleobiogeography, and a phylogenetic approach. Martins-Neto, Rafael Gióia; Gallego, Oscar Florencio; Tassi, Lara Vaz // Gaea: Journal of Geoscience;Jan2011, Vol. 7 Issue 1, p1 

    A review of the southern South American Triassic coleopteran fauna as well as a phylogenetical approach resulting from its analysis is presented. This work provides new tools for the study of fossil coleopteran elytra, based in its morphological aspects, its fossil record in the Middle to Late...

  • New information on sexual dimorphism and allometric growth in Keichousaurus hui, a pachypleurosaur from the Middle Triassic of Guizhou, South China. YIFAN XUE; DAYONG JIANG; RYOSUKE MOTANI; RIEPPEL, OLIVIER; YUANLIN SUN; ZUOYU SUN; CHENG JI; PENGFEI YANG // Acta Palaeontologica Polonica;2015, Vol. 60 Issue 3, p681 

    Keichousaurus hui is a small pachypleurosaur (Reptilia: Sauropterygia) from the Triassic of China. Many specimens of various growth stages are known, making them ideal for ontogenetic research. We report 22 new specimens from the Middle Triassic of Xingyi (Guizhou, south China), and combined...

  • Fossil Invertebrates. Franceschetti, Donald R. // Magill Book Reviews; 

    A richly illustrated guide to fossil invertebrates and related modern species.


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics