Macrosemimimus, gen. nov. (Actinopterygii, Semionotiformes), from the Late Jurassic of Germany, England, and France
Macrosemimimus, gen. nov. (Actinopterygii, Semionotiformes), from the Late Jurassic of Germany, England, and France
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Macrosemimimus, gen nov (Actinopterygii, Semionotiformes)，产自晚侏罗世的德国、英国和法国
DOI：
10.1080/02724634.2012.649626
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
López-Arbarello
中科院分区：
文献类型：
--
作者：
Schröder;López-Arbarello
We describe a new semionotiform genus, which was recognized while studyingMacrosemimimus fegerti, gen. et sp. nov., from the Late Jurassic Solnhofen Archipelago, Germany.Macrosemimimus(Lepidotes)lennierifrom the early Kimmeridgian of Cap de la Hève, France, includingLepidotes toombsifrom the Lower Kimmeridge Clay in Cambridgeshire, England, as a junior synonym, also belong to the new genus. Though different species, the presence of the same fish genus in different biodiversity zones suggests that semionotiforms might have been less sensible to the ecological and physical factors that caused the endemisms recognized in the invertebrate faunas.Macrosemimimusis mainly distinguished by the peculiar shape of the antorbital portion of the frontal bones, a single pair of extrascapular bones that do not reach the dorsal midline, anteriorly open circumborbital ring, only two suborbital bones, edentulous maxilla, a large quadratojugal involved in the jaw articulation, four postcleithra, and the pectoral fins placed very low and joining ventrally. The two included species differ in the ornamentation of the skull bones, the morphology of the scales, the relative size and position of the extrascapular bones, the dorsal extension of the preoperculum, and the kind of dentition. Although the phylogenetic relationships ofMacrosemimimusare not yet established, the particular shape of the antorbital portion of the frontals and the patterns of the extrascapular and suborbital bones indicate possible systematic affinity with the macrosemiids, “Lepidotes”gloriaefrom the Oxfordian of Cuba, and “Lepidotes”microrhisand “Lepidotes”tanyrhisfrom the Barremian of Las Hoyas, Spain.
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2005
期刊：
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DOI：
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期刊：
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DOI：
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1989
期刊：
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DOI：
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发表时间：
2009
期刊：
影响因子：
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