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Trochochaeta mexicana, a new species from an unusual family of Polychaeta, with comments on the world distribution of Trochochaetidae

Published online by Cambridge University Press:  01 November 2010

Pablo Hernández-Alcántara  and
Vivianne Solís-Weiss
Pablo Hernández-Alcántara
Affiliation:
Laboratorio de Ecología y Biodiversidad de Invertebrados Marinos, Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, Apartado Postal 70–305, México, D.F. 04510, México
Vivianne Solís-Weiss*
Affiliation:
Laboratorio de Ecología y Biodiversidad de Invertebrados Marinos, Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, Apartado Postal 70–305, México, D.F. 04510, México
*
Correspondence should be addressed to: V. Solís-Weiss, Laboratorio de Ecología y Biodiversidad de, Invertebrados Marinos, Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, Apartado Postal 70–305, México, D.F. 04510, Méxicoemail:solisw@cmarl.unam.mx
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Abstract

The small, monogeneric family of polychaetes known as Trochochaetidae has been exclusively collected in the northern hemisphere, mainly in temperate–cold environments. Nine species have been described so far including Trochochaeta mexicana sp. nov. described herein, while one species remains unnamed. Only two species had previously been recorded in the eastern Pacific, so T. mexicana sp. nov. is the first record for the family in the tropical Mexican Biogeographic Province. The new species is characterized by having a pair of eyes, acicular neurochaetae on chaetigers 2 and 3, a small knob-like antenna and a nuchal crest projecting through chaetiger 1. Trochochaeta mexicana sp. nov., together with Trochochaeta kirkegaardi, Trochochaeta diverapoda and Trochochaeta cirrifera are the only trochochaetids that have been found exclusively in warm environments.

Keywords

PolychaetaTrochochaetidaenew speciesMexican Pacific
Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 91 , Special Issue 2: Biodiversity and Taxonomy , March 2011 , pp. 403 - 413
Copyright
Copyright © Marine Biological Association of the United Kingdom 2010

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