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A new species of otoplanid (Plathelminthes: Rhabditophora: Otoplanidae) from Sicily, Italy

Published online by Cambridge University Press:  17 June 2010

A. Lanfranchi ,
G. Meini  and
M. Melai
A. Lanfranchi*
Affiliation:
Dipartimento di Biologia, Università di Pisa, Via Volta 6, 56126 Pisa, Italy
G. Meini
Affiliation:
Dipartimento di Biologia, Università di Pisa, Via Volta 6, 56126 Pisa, Italy
M. Melai
Affiliation:
Dipartimento di Biologia, Università di Pisa, Via Volta 6, 56126 Pisa, Italy
*
Correspondence should be addressed to: A. Lanfranchi, Dipartimanto di Biologia, Università di Pisa, via Volta 6, 56126 Pisa, Italy email: [email protected]
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Abstract

A new species, Philosyrtis aegusae sp. nov., collected in the ‘Otoplanen-Zone’ of the sands of western Sicily, is described. The specimens show the typical morphological peculiarities of the subfamily Parotoplaninae (‘Turbellaria’: Otoplanidae), but differ clearly from the species already described. The body length of the sexually mature animals reaches 0.9–1.1 mm and they appear to belong to the genus Philosyrtis because of the general arrangement of testes and germo-vitellaria, and of the sclerotic apparatus. The vesicula granulorum is clearly distinct from the sclerotic apparatus unlike the other ten species belonging to the same genus. The male copulatory organ consists of a dorsal group of 7–8 spines similar in shape and length (33–40 mm), and a ventral group of at least 6 long thin spines with curved pointed tips. The new species differs from the already described species above all in its body dimensions, the shorter path of the vitellaries and especially the characteristics of the male sclerotic apparatus.

Keywords

otoplanidnew speciesflatwormsmeiofaunasclerotic apparatusvesicula granulorum
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. 383 - 386
Copyright
Copyright © Marine Biological Association of the United Kingdom 2010

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