The Sexual Dimorphism of Shastasaurus Tangae (Reptilia: Ichthyosauria) from the Triassic Guanling Biota, China

详细信息

责任者：Shang Qinghua (Key Laboratory of Vertebrate Evolution and Human Origins ; Institute of Vertebrate Paleontology and Paleoanthropology ; Chinese Aeademy of Sciences ; Beijing 100044 ; China) ; Li Chun
刊名：Vertebrata Palasiatica
出版年：2013
卷期：51(4)
关键词：鱼龙目 ; Ichthyosauria ; 贵州 ; Guizhou Province
页码：p.253-264
图表：2 illus., 2 tables, 25 refs.
分类号：1101
issnNo：ISSN1000-3118
isbnNo：CN11-1905/Q

摘要

Marine reptiles, especially large-sized long-snout ichthyosaurs, are highly controversial in taxonomy in Guanling Biota font>font-family: 宋体; mso-ascii-font-family: calibri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: calibri; mso-hansi-theme-font: minor-latin">（font>early Camian, Guizhou, SW Chinafont>font-family: 宋体; mso-ascii-font-family: calibri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: calibri; mso-hansi-theme-font: minor-latin">）font>. A large number of large- sized long-snout ichthyosaur skeletons have been excavated from Guanling and adjacent areas since 2000. Totally 14 specimens were used for taxonomical research and morphological description in previous works, which were originally named as different genera and species font>font-family: 宋体; mso-ascii-font-family: calibri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: calibri; mso-hansi-theme-font: minor-latin">（font>Yin et al., 2000font>font-family: 宋体; mso-ascii-font-family: calibri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: calibri; mso-hansi-theme-font: minor-latin">：font> Gmr 009, Gmr 015; Li and You, 2002font>font-family: 宋体; mso-ascii-font-family: calibri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: calibri; mso-hansi-theme-font: minor-latin">：font> IVPP V 11865, V 11869; Chen and Cheng, 2003font>font-family: 宋体; mso-ascii-font-family: calibri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: calibri; mso-hansi-theme-font: minor-latin">：font> TR 00001, SPCV 30014; Maisch et al., 2006font>font-family: 宋体; mso-ascii-font-family: calibri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: calibri; mso-hansi-theme-font: minor-latin">：font> GNP dq-46, D-41, dq-22; Pan et al., 2006font>font-family: 宋体; mso-ascii-font-family: calibri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: calibri; mso-hansi-theme-font: minor-latin">：font> font>GMPKU P1062; Chen et al., 2007font>font>font-family: 宋体; mso-ascii-font-family: calibri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: calibri; mso-hansi-theme-font: minor-latin">：font> SPCV 10305, 10306; Shang and Li, 2009font>font-family: 宋体; mso-ascii-font-family: calibri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: calibri; mso-hansi-theme-font: minor-latin">：font> IVPP V 11853; Shang et al., 2012font>font-family: 宋体; mso-ascii-font-family: calibri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: calibri; mso-hansi-theme-font: minor-latin">：font> IGGCAS 2005F001font>font-family: 宋体; mso-ascii-font-family: calibri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: calibri; mso-hansi-theme-font: minor-latin">）font>. Based on the similarity of cranial morphology, Shang et al. font>font-family: 宋体; mso-ascii-font-family: calibri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: calibri; mso-hansi-theme-font: minor-latin">（font>2012font>font-family: 宋体; mso-ascii-font-family: calibri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: calibri; mso-hansi-theme-font: minor-latin">）font> referred all of these specimens to one species Shastasaurus tangae.font> font>Two additional large-sized long-snout ichthyosaur specimens font>font>font-family: 宋体; mso-ascii-font-family: calibri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: calibri; mso-hansi-theme-font: minor-latin">（font>IVPP V 15652, SDM 20090101font>font-family: 宋体; mso-ascii-font-family: calibri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: calibri; mso-hansi-theme-font: minor-latin">）font> are used for further comparison. These specimens can be referred confidently to S. tangae based on the cranial characters, such as long snout; premaxilla without subnarial process; moderately developed anterior terrace of supratemporal fenestra; high parietal sagittal crest bifurcated both anteriorly and posteriorly; relatively short postorbital skull region. However, they are slightly different from the holotype of Stangae in limb morphology.font>

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