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Issue: Vol. 976 No. 1: 13 May. 2005
Type: Articles
Published: 2005-05-13
DOI: 10.11646/zootaxa.976.1.1
Page range: 1–8
Abstract views: 39
PDF downloaded: 2

A new freshwater leech species of Helobdella (Annelida: Glossiphoniidae) from central Mexico

Laboratorio de Helmintología “Eduardo Caballero y Caballero”. Instituto de Biología, Universidad Nacional Autónoma de México. Tercer Circuito s/n, Ciudad Universitaria, Copilco, Coyoacán. A.P. 70-153. México, Distrito Federal. C.P.14510
Laboratorio de Helmintología “Eduardo Caballero y Caballero”. Instituto de Biología, Universidad Nacional Autónoma de México. Tercer Circuito s/n, Ciudad Universitaria, Copilco, Coyoacán. A.P. 70-153. México, Distrito Federal. C.P.14510
Annelida Hirudinea Glossiphoniidae Helobdella Mexico

Abstract

Helobdella atli n sp. is described based on the examination of 20 specimens collected in Totolcingo Lake, Tlaxcala, Mexico. Leeches were found attached to submerged rocks and plants. Study of specimens included optical and scanning electron microscopy. Diagnostic characters are: sperm ducts with a long posterior extension, a dorsal nuchal scute on somite VIII, postcaeca absent in the last pair of crop caeca and the mouth pore in the anterior margin of the oral sucker. Previous records of H. adiastola in Mexico correspond to H. atli n. sp.

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