A new Changhsingian (Lopingian) brachiopod fauna of the shallow-water clastic-shelf facies from Fujian Province, southeastern China

Although much attention has been paid to Changhsingian brachiopods in South China, there are only two Chinese studies, published in 1979 and 1990, on Changhsingian brachiopods from the southeastern part of South China. Based on systematically collected fossil material, this paper describes and quantitatively analyses a Changhsingian brachiopod fauna from the Luokeng Formation at the Hongtian section, Fujian Province, southeastern China, for the first time. Among the brachiopods (30 species in 18 genera) described and illustrated,Cathaysia yongdingensis Liao and an endemic genus of South China (Qinglongia) are reported in English for the first time. Two new species,Neochonetes(Sommeriella)longaand Neochonetes(Sommeriella)transversa,are also proposed. The Hongtian fauna is mainly composed of Cathaysia (29.4%),Neochonetes (19.3%), Linoproductus(13.5%), Orthothetina(11.7%), and is correlated with the brachiopod fauna from the lower part of the Luokeng Formation in Fujian Province.

尽管华南地区的长兴阶（Changhsingian）腕足动物（brachiopods）已受到广泛关注，但针对华南东南部长兴阶腕足动物的中文研究仅见于1979年和1990年发表的两项成果。本文基于系统采集的化石材料，首次对中国东南部福建省红田剖面（Hongtian section）洛坑组（Luokeng Formation）的长兴阶腕足动物群进行了描述与定量分析。本次记述并配图的18属30种腕足动物中，永定华夏贝（Cathaysia yongdingensis Liao）以及华南特有属青龙贝属（Qinglongia）均为首次以英文形式报道。此外还建立了两个新种：长形新脊贝（Neochonetes (Sommeriella) longa）与横形新脊贝（Neochonetes (Sommeriella) transversa）。红田腕足动物群主要由华夏贝属（Cathaysia，占比29.4%）、新脊贝属（Neochonetes，占比19.3%）、线纹长身贝属（Linoproductus，占比13.5%）以及小正形贝属（Orthothetina，占比11.7%）构成，并可与福建省洛坑组下段的腕足动物群进行对比。