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A New Acanthocyclops Kiefer , 1927 (Copepoda: Cyclopoida) from Central Mexico with Comments on the Distributionof the Genus in Middle America
Author(s) -
Mercado Nancy,
SuárezMorales Eduardo,
SilvaBriano M.
Publication year - 2006
Publication title -
international review of hydrobiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.524
H-Index - 52
eISSN - 1522-2632
pISSN - 1434-2944
DOI - 10.1002/iroh.200510856
Subject(s) - seta , cyclopoida , biology , genus , clade , zoology , lineage (genetic) , ecology , taxonomy (biology) , subtropics , crustacean , phylogenetics , copepod , biochemistry , gene
Abstract A new species of Acanthocyclops Kiefer is described from central Mexico. It differs from its congeners by a combination of characters including mainly: 11–13 antennular segments, a spine formula of 3444 and modified setae on legs 2–4. The presence of a compound distal antennular segment is aberrant within the Cyclopoida. The new species seems to be related to Nearctic forms of the vernalis – robustus clade. Ancestors of this lineage probably reached central Mexico as a result of glaciation events and the new species is a remain of stranded postglacial populations; some of these forms were succesful in colonizing tropical lands. A key for the identification of the species of Acanthocyclops recorded in Mexico is included. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)