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Issue: Vol. 5263 No. 4: 11 Apr. 2023
Type: Article
Published: 2023-04-11
DOI: 10.11646/zootaxa.5263.4.7
Page range: 557-565
Abstract views: 227
PDF downloaded: 22

A taxonomic reassessment of Cirrodrilus japonicus (Pierantoni, 1912) (Annelida, Clitellata, Branchiobdellida)

Faculty of Education; Hirosaki University; Hirosaki 036-8560; Japan
Department of Science; University of Maine at Presque Isle; Maine 04769; USA
Annelida Cirrodrilus ezoensis junior synonym Japanese branchiobdellidan

Abstract

Cirrodrilus japonicus (Pierantoni, 1912) has not been identified since it was originally described from specimens removed from preserved Japanese crayfish that had been deposited in the Natural History Museum in Hamburg, Germany. A morphological comparison of the published description and recently discovered syntypes of C. japonicus from the Hamburg Museum with syntypes and newly collected material of Cirrodrilus ezoensis (Yamaguchi, 1934), supported the view that preservation artifacts in C. japonicus caused Prof. Yamaguchi to believe his well-preserved specimens were member of a separate species. Therefore, C. ezoensis becomes a junior synonym of C. japonicus.

 

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