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Issue: Vol. 3034 No. 1: 20 Sep. 2011
Type: Articles
Published: 2011-09-20
DOI: 10.11646/zootaxa.3034.1.2
Page range: 32–46
Abstract views: 49
PDF downloaded: 1

On the Calviriidae Martens and Curini-Galletti, 1993 (Platyhelminthes, Proseriata), with the description of three new species

University of Hasselt, Centre of Environmental Sciences, Research group Zoology: biodiversity and toxicology, Agoralaan, building D, B-3590 Diepenbeek, Belgium
University of Sassari, Dipartimento di Zoologia e Genetica Evoluzionistica Via F. Muroni, 25, I-07100 Sassari, Italy
University of Hasselt, Centre of Environmental Sciences, Research group Zoology: biodiversity and toxicology, Agoralaan, building D, B-3590 Diepenbeek, Belgium
University of Hasselt, Centre of Environmental Sciences, Research group Zoology: biodiversity and toxicology, Agoralaan, building D, B-3590 Diepenbeek, Belgium
Platyhelminthes taxonomy phylogeny Subantartic Tasmania Iceland

Abstract

Three new species of Calviriidae are described, belonging to two new genera: Diskeria gigantea n.g. n.sp., D. tasmanica n.sp. and Paracalviria islandica n.g. n.sp. The species of Diskeria have a copulatory organ with two rings of needles of which the internal ring forms a structure resembling a stylet. The accessory organ has a large glandular reservoir connected by a muscular duct to a “true” stylet surrounded by needles. The two species can be discerned by the number and size of the needles in the copulatory organ and in the accessory organ. In the female system there is a large terminal bursa. Paracalviria islandica has a copulatory organ with one circle of ±60 needles and an unarmed, sucker-like accessory organ in the male atrium. The female system is very simple without a bursa. Contrary to the other members of the Calviriidae, P. islandica has an epidermis with insunk nuclei, no septum in front of the pharynx and no sphincter around the gut above the pharynx. The relationships of and within the Calviriidae are discussed and compared with the recent results based on DNA analyses. Morphological arguments are given for the monophyly of the taxon Calviriidae. Amended diagnoses for the family and the four genera within the family are provided.

References

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