Bryozoans from the lower Silurian (Telychian) Hanchiatien Formation from southern Chongqing, South China

Bryozoans from the lower Silurian (Telychian) Hanchiatien Formation from southern Chongqing, South China
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华南重庆南部下志留统(特列奇阶)Hanchiatien 组苔藓虫

DOI:
10.1017/jpa.2020.86
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发表时间:
2020-11
影响因子:
1.4
通讯作者:
Axel Munnecke
Axel Munnecke
中科院分区:
地球科学4区
文献类型:
--
作者:
Andrej Ernst;Qi-Jian Li;Min Zhang;Axel Munnecke

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抽象。报道了采自重庆南部寒家田组(Telychian,下志留统)的苔藓虫8种。4个新种:中华密口吸虫(Trepostomes dappora sinensis n.)例如,界北孔珊瑚sp.,和细孔菌Trematopora tenuis n.例如,和窗孔Moorephylloporina parvula n.一种是囊孔菌Hennigopora sp. indet.,以开放命名法描述。小多叶孔菌sp.是广布的,发生在生物礁内的所有类型的相。直立的Moorephylloporina Bassler,1952年,Trematopora Hall,1852年和Leioclema Ulrich,1882年在弱胶结基底上形成了先驱群落,而包壳的Fistulipora M 'Coy,1849年,Hennigopora Bassler,1952年和Asperopora Owen,1969年出现在坚硬的地面上,并形成了致密的框架石。强壮的分支Trematopora和Leioclema往往出现在珊瑚礁核心(框架)之外,在那里它们可以在更激动的条件下形成礁侧灌木丛。研究区系的属组成与华南其他地区有一定的相关性,并与西伯利亚和美国印第安纳州有较好的古地理联系。
Abstract. Eight bryozoan species are described from the Hanchiatien Formation (lower Silurian, Telychian) of southern Chongqing, South China. Four species are new: the trepostomes Asperopora sinensis n. sp., Trematopora jiebeiensis n. sp., and Trematopora tenuis n. sp., and the fenestrate Moorephylloporina parvula n. sp. One species, the cystoporate Hennigopora sp. indet., is described in open nomenclature. Moorephylloporina parvula n. sp. is eurytopic, occurring in all types of facies within the bioherms. Erect Moorephylloporina Bassler, 1952, Trematopora Hall, 1852, and Leioclema Ulrich, 1882 formed pioneering communities on weakly cemented substrata, whereas encrusting Fistulipora M‘Coy, 1849, Hennigopora Bassler, 1952, and Asperopora Owen, 1969 occurred on hardgrounds and formed densely compact framestones. Robust branched Trematopora and Leioclema tend to occur out of the reef core (framework) where they could have formed reef-flank thickets in more agitated conditions. The generic composition of the studied fauna correlates with other localities in South China, and they show general paleobiogeographic relations to Siberia and Indiana, USA.
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