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First record of Bystrowianid Chroniosuchians (Amphibia: Anthracosauromorpha ) from the Middle Permian of China
Author(s) -
JIANG Shan,
JI Shuan,
MO Jinyou
Publication year - 2017
Publication title -
acta geologica sinica ‐ english edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.444
H-Index - 61
eISSN - 1755-6724
pISSN - 1000-9515
DOI - 10.1111/1755-6724.13397
Subject(s) - permian , phyletic gradualism , paleontology , tetrapod (structure) , china , ecological succession , geology , geography , biology , structural basin , ecology , archaeology , phylogenetics , biochemistry , gene
Chroniosuchians are basal tetrapods owing to Anthracosauromorpha and the oldest species of chroniosuchians have been recorded in the Late Permian of Russia so far. In this study, we present evidence for their existence in the Middle Permian of China, based on well preserved diagnostic vertebrae with associated osteoderms from the Dashankou fanua in northwestern China. The finds clearly show interosteoderm articulation pattern between the adjacent scutes in bystrowianids. The features observed in Yumenerpeton yangi may warrant the close proximity or phyletic succession of the chroniosuchid and bystrowianid types of the osteoderm design.