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印度侏罗纪时期首例鱼龙的发现：对冈瓦纳古生物地理学的意义

Discovery of the first ichthyosaur from the Jurassic of India: Implications for Gondwanan palaeobiogeography.

作者信息

Prasad Guntupalli V R, Pandey Dhirendra K, Alberti Matthias, Fürsich Franz T, Thakkar Mahesh G, Chauhan Gaurav D

机构信息

Department of Geology, Centre for Advanced Studies, University of Delhi, Delhi, India.

Earth and Planetary Sciences Group, Manipal Center for Natural Sciences, Manipal University, Manipal, Karnataka, India.

出版信息

PLoS One. 2017 Oct 25;12(10):e0185851. doi: 10.1371/journal.pone.0185851. eCollection 2017.

DOI:10.1371/journal.pone.0185851
PMID:29069082
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5656312/
Abstract

An articulated and partially preserved skeleton of an ichthyosaur was found in the Upper Jurassic (Upper Kimmeridgian) Katrol Formation exposed at a site south of the village Lodai in Kachchh district, Gujarat (western India). Here we present a detailed description and inferred taxonomic relationship of the specimen. The present study revealed that the articulated skeleton belongs to the family Ophthalmosauridae. The new discovery from India further improves the depauperate fossil record of ichthyosaurs from the former Gondwanan continents. Based on the preserved length of the axial skeleton and anterior part of the snout and taking into account the missing parts of the skull and postflexural region, it is suggested that the specimen may represent an adult possibly reaching a length of 5.0-5.5 m. The widespread occurrence of ophthalmosaurids in the Upper Jurassic deposits of western Tethys, Madagascar, South America and India points to possible faunal exchanges between the western Tethys and Gondwanan continents through a southern seaway.

摘要

在印度西部古吉拉特邦卡奇区洛代村以南一处露头上的上侏罗统（基米里季阶上部）卡特罗尔组中，发现了一具有关节且部分保存的鱼龙骨架。在此，我们对该标本进行详细描述并推断其分类关系。本研究表明，这具有关节的骨架属于大眼鱼龙科。来自印度的这一新发现进一步完善了前冈瓦纳大陆鱼龙匮乏的化石记录。根据轴向骨骼和吻部前部的保存长度，并考虑到头骨和弯曲后区域缺失的部分，推测该标本可能代表一只成年个体，体长可能达到5.0 - 5.5米。大眼鱼龙科在上侏罗统特提斯海西部、马达加斯加、南美洲和印度的广泛分布，表明特提斯海西部和冈瓦纳大陆之间可能通过一条南部海路进行了动物群交流。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/56bf/5656312/972c2b76eb02/pone.0185851.g014.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/56bf/5656312/75fb083fcf79/pone.0185851.g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/56bf/5656312/648e30d8768a/pone.0185851.g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/56bf/5656312/d98b40a846f4/pone.0185851.g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/56bf/5656312/a46da546c1e0/pone.0185851.g011.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/56bf/5656312/b97ac5dbfa2d/pone.0185851.g013.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/56bf/5656312/972c2b76eb02/pone.0185851.g014.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/56bf/5656312/e1e2d91bb1c5/pone.0185851.g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/56bf/5656312/32a3a9ff6a71/pone.0185851.g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/56bf/5656312/bd73e822b3d6/pone.0185851.g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/56bf/5656312/1002f8f7b2a1/pone.0185851.g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/56bf/5656312/8400a35e2579/pone.0185851.g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/56bf/5656312/4b552e6955f6/pone.0185851.g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/56bf/5656312/42d35a7d9f19/pone.0185851.g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/56bf/5656312/75fb083fcf79/pone.0185851.g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/56bf/5656312/648e30d8768a/pone.0185851.g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/56bf/5656312/d98b40a846f4/pone.0185851.g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/56bf/5656312/a46da546c1e0/pone.0185851.g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/56bf/5656312/1b5422638869/pone.0185851.g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/56bf/5656312/b97ac5dbfa2d/pone.0185851.g013.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/56bf/5656312/972c2b76eb02/pone.0185851.g014.jpg

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