Evolutionary patterns of Productida (Brachiopoda) morphology during the Permian in South China
ZHANG Yang1 & HE WeiHong1,2
1 Faculty of Earth Sciences, China University of Geosciences, Wuhan 430074, China;
2 Key Laboratory of Biogeology and Environmental Geology of Ministry of Education, China University of Geosciences, Wuhan 430074, China
The evolutionary patterns of Productida (brachiopod) morphology throughout the Permian show that while the percentage proportion of Productida (brachiopod) with strongly concentric and radial orna-mentation declined from the Cisuralian to the Guadalupian, and then increased towards the Changh-singian via Wuchiapingian, the percentage proportion of Productida (brachiopod) with fine concentric and radial ornamentation distinctly increased from the Cisuralian to the Guadalupian, slightly declined towards the Wuchiapingian, and then increased towards the Changhsingian. From the Cisuralian to the Changhsingian, the percentage proportion of brachiopods with spinose ornamentation shows a per-sistent declining trend. The shell size generally indicates a miniaturization trend at species level during the Wuchiapingian to Changhsingian (including the transitional bed). These evolutionary patterns of brachiopod ornamentation and size are possibly related to the anoxia, food shortage, sea-level fluc-tuation, and change of substrate in the Permian (including the Permian-Triassic transitional interval) in South China.
Received: 05 June 2008
Published: 25 September 2008
Supported by NSFC Innovation Research Group Program (Grant No. 40621002), MOE Innovative Research Team Program (Grant No. IRT0546), the National Natural Science Foundation of China (Grant Nos. 40502001 and 40872008) and the “111” Project (Grant No. B08030)
ZHANG Yang E-mail: firstname.lastname@example.org
Cite this article:
ZHANG Yang HE WeiHong. Evolutionary patterns of Productida (Brachiopoda) morphology during the Permian in South China. SCIENCE CHINA Earth Sciences,
2008, 51(11): 1589-1600.