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

LI Ning and YU Lili

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Global Geology ›› 2025, Vol. 28 ›› Issue (1) : 1-10.

LI Ning1,2* and YU Lili3

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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.

Key words

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

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LI Ning and YU Lili. Revision of the Strophomenida (Brachiopoda) in the Lower Devonian of central Jilin Province, China[J]. Global Geology. 2025, 28(1): 1-10