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Additions to the description, reproduction and systematic position of the enigmatic species Acritagasyllis longichaetosus Lucas, San Martín & Sikorski, 2010 (Annelida: Phyllodocida: Syllidae)

Published online by Cambridge University Press:  22 December 2015

Alessandra Rivolta ,
Guillermo San Martín  and
Andrey Sikorski
Alessandra Rivolta
Affiliation:
Departamento de Biología (Zoología), Facultad de Ciencias, Universidad Autónoma de Madrid, Canto Blanco, 28049 Madrid, Spain
Guillermo San Martín*
Affiliation:
Departamento de Biología (Zoología), Facultad de Ciencias, Universidad Autónoma de Madrid, Canto Blanco, 28049 Madrid, Spain
Andrey Sikorski
Affiliation:
Akvaplan-niva AS, The Polar Environmental Centre, 9296 Tromsø, Norway
*
Correspondence should be addressed to:G. San Martín, Departamento de Biología (Zoología), Facultad de Ciencias, Universidad Autónoma de Madrid, Canto Blanco, 28049 Madrid, Spain email: guillermo.sanmartin@uam.es
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Abstract

We present some additional information to Acritagasyllis longichaetosus Lucas, San Martín & Sikorski 2010, the only representative of an enigmatic genus of Syllidae from subpolar areas off Norway, based on two newly found specimens and one male and another female stolons. The armature of the pharynx was incorrectly interpreted in the original description, having in fact a trepan instead of a single pharyngeal tooth as originally described. The reproductive stolons are herein described for the first time. With this new information we performed a maximum parsimony phylogenetic analysis that placed this genus within the subfamily Autolytinae, despite its peculiar morphological characteristics. For this reason, we propose a new diagnosis to the genus Acritagasyllis as well as a modified diagnosis of the subfamily Autolytinae.

Keywords

AcritagasyllisSyllidaeAnnelidaArctic Oceanstolonsphylogenetic position
Type
Review Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 96 , Issue 8 , December 2016 , pp. 1709 - 1716
Copyright
Copyright © Marine Biological Association of the United Kingdom 2015 

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