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Global Geology 2025, 28(1) 1-10 DOI: ISSN: 1673-9736 CN: 22-1371/P

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Revision of the Strophomenida (Brachiopoda) in the Lower Devonian of central Jilin Province, China

LI Ning1,2* and YU Lili3

1. College of Earth Sciences, Jilin University, Changchun 130061, China;

2. International Center of Future Science, Dinosaur Evolution Research Center, Jilin University, Changchun 130061, China;

3. No.104 Co., Ltd. of Inner Mongolia Coal Geological Exploration, Chifeng 024005, Inner? Mongolia Autonomous Region, China

Abstract: A genus within the family Douvillinidae of the order Strophomenida from the Erdaogou Member of the Xibiehe Formation in the Early Devonian of central Jilin has been re-examined, with consideration

given to the 56 specimens collected and described by Liu and Huang (1977). Based on its distinct external ornamentation and internal characteristics, it has been classified as Cymostrophia (Protocymostrophia). It is

concluded that the three specices described by Liu and Huang (1977), Idioglyptus alatus, I. semicircularis, I. subquadratus, as well as the Mesodouvillina jilinensis Su, 1980 should be considered synonyms and be

named Cymostrophia (Protocymostrophia) alatus (Liu) Li.

Keywords: Cymostrophia (Protocymostrophia) Strophomenida Erdaogou Member central Jilin Early? Devonian

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