A new species ofPlatysiagumfrom the Luoping Biota (Anisian, Middle Triassic, Yunnan, South China) reveals the relationship between Platysiagidae and Neopterygii
| Autor: | Zhong-Qiang Chen, J. Y. Huang, T. Xie, C. Y. Zhou, W. Wen, Michael J. Benton, Shixue Hu, Jürgen Kriwet, Q. Y. Zhang |
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| Rok vydání: | 2018 |
| Předmět: |
010506 paleontology
South china biology Phylogenetic tree southwest China Neopterygii Platysiagum Luoping Biota Platysiagum sinensis Geology Biota 010502 geochemistry & geophysics biology.organism_classification Tethys Ocean Middle Triassic 01 natural sciences Paleontology Geography Platysiagidae 0105 earth and related environmental sciences Perleidiformes Ganoine |
| Zdroj: | WEN, W, HU, S X, ZHANG, Q Y, BENTON, M J, KRIWET, J, CHEN, Z Q, ZHOU, C Y, XIE, T & HUANG, J Y 2018, ' A new species of Platysiagum from the Luoping Biota (Anisian, Middle Triassic, Yunnan, South China) reveals the relationship between Platysiagidae and Neopterygii ', Geological Magazine, pp. 1-14 . https://doi.org/10.1017/S0016756818000079 |
| ISSN: | 1469-5081 0016-7568 |
| Popis: | Four complete platysiagid fish specimens are described from the Luoping Biota, Anisian (Middle Triassic), Yunnan Province, southwest China. They are small fishes with bones and scales covered with ganoine. All characters observed, such as nasals meeting in the midline, a keystone-like dermosphenotic, absence of post-rostral bone, two infraorbitals between dermosphenotic and jugal, large antorbital, and two postcleithra, suggest that the new materials belong to a single, newPlatysiagumspecies,P. sinensissp. nov. Three genera are ascribed to Platysiagidae:Platysiagum,HelmolepisandCaelatichthys. However, most specimens of the first two genera are imprints or fragmentary. The new, well-preserved specimens from the Luoping Biota provide more detailed anatomical information than before, and thus help amend the concept of the Platysiagidae. The Family Platysiagidae was previously classed in the Perleidiformes. Phylogenetic analysis indicates that the Platysiagidae is a member of basal Neopterygii, and its origin seems to predate that of Perleidiformes. Moreover, platysiagid fishes are known from the Middle Triassic of the western Tethys region. The newly found specimens of platysiagids from Luoping provide additional evidence that both eastern and western sides of the Tethys Ocean were biogeographically more connected than previously thought. |
| Databáze: | OpenAIRE |
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