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Taxonomic revision of Asialepidotus shingyiensis Su, 1959 (Halecomorphi, Holostei) from the Middle Triassic (Ladinian) of Guizhou and Yunnan, China |
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| รหัสดีโอไอ | |
| Creator | Guang-Hui Xu and Xin-Ying Ma |
| Title | Taxonomic revision of Asialepidotus shingyiensis Su, 1959 (Halecomorphi, Holostei) from the Middle Triassic (Ladinian) of Guizhou and Yunnan, China |
| Publisher | Mahasarakham University |
| Publication Year | 2560 |
| Journal Title | Research & Knowledge |
| Journal Vol. | 3 |
| Journal No. | 1 |
| Page no. | 36-38 |
| Keyword | Triassic, ionoscopiformes, osteology, phylogeny, South China |
| ISSN | 2408 - 204X |
| Abstract | The holostean i sh Asialepidotus shingyiensis, from the Middle Triassic (Ladinian) ofGuizhou and Yunnan, China, was previously regarded as either a semionotiform ginglymodian or anamiiform halecomorph. This study provides a revision of this taxonomically controversial taxon basedon a comparative study including the holotype and 50 new specimens. Newly recognized anatomicalinformation includes the dermal component on the sphenotic, complete series of circumorbital bones,palatal bones, quadratojugal, hyomandibula, sensory canal in the maxilla, notched posterior margin ofthe maxilla, median gular, and many elements on the medial surface of the lower jaw. Results of acladistic analysis incorporating these new data place Asialepidotus as an ionoscopiform halecomorphthat is more derived than Subortichthys and Panxianichthys, and consists of the sister taxon ofRobustichthys and all other ionoscopiforms. |
