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Issue: Vol. 5424 No. 2: 13 Mar. 2024
Type: Article
Published: 2024-03-13
DOI: 10.11646/zootaxa.5424.2.5
Page range: 214-224
Abstract views: 153
PDF downloaded: 7

A new species of Eutyphoeus earthworm (Clitellata: Acanthodrilidae) from Mizoram, North-East India

Department of Zoology; Pachhunga University College; Mizoram University; Aizawl; 796001; Mizoram; India
Department of Zoology; Pachhunga University College; Mizoram University; Aizawl; 796001; Mizoram; India
School of Biological and Environmental Sciences; Faculty of Basic Sciences; Shoolini University of Biotechnology and Management Sciences; Solan; 173212; Himachal Pradesh; India
Department of Biotechnology; Mizoram University; Tanhril; Aizawl; 796004; Mizoram; India
Department of Zoology; Mizoram University; Tanhril; Aizawl; 796004; Mizoram; India
Department of Zoology; Mizoram University; Tanhril; Aizawl; 796004; Mizoram; India
Department of Zoology; Mizoram University; Tanhril; Aizawl; 796004; Mizoram; India
Department of Zoology; Mizoram University; Tanhril; Aizawl; 796004; Mizoram; India
Department of Zoology; Mizoram University; Tanhril; Aizawl; 796004; Mizoram; India
Department of Zoology; Mizoram University; Tanhril; Aizawl; 796004; Mizoram; India
Department of Zoology; Mizoram University; Tanhril; Aizawl; 796004; Mizoram; India
Annelida CO1 gene earthworm Eutyphoeus gigas group penes spermathecae Khawrihnim Mizoram India

Abstract

We describe here a new species of terrestrial earthworm Eutyphoeus rihnimensis sp. nov. (family Acanthodrilidae) from specimens collected at Khawrihnim, a village in Mizoram, Northeast India. The new species is distinguished from its congener members in E. gigas group in having an outgrowth that branches into four finger-like projections from the male porophores, five pairs of supra-intestinal glands in 81–88 segments, typhlosole that begins from segment 25, ventral intestinal caeca 10 that covers segments 33-34, a bidiverticulate spermathecae with a short and stout duct, and very short lateral and median diverticula among other characters. Sequence analysis based on mitochondrial cytochrome c oxidase subunit 1 (CO1) gene further warrants its distinction from known species of Eutyphoeus.

 

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