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Biodiversity patterns in interstitial marine microturbellaria: a case study within the genus Parotoplana (Platyhelminthes: Rhabditophora) with the description of four new species

Casu, Marco and Scarpa, Fabio and Delogu, Valentina and Cossu, Piero and Lai, Tiziana and Sanna, Daria and Curini Galletti, Marco (2014) Biodiversity patterns in interstitial marine microturbellaria: a case study within the genus Parotoplana (Platyhelminthes: Rhabditophora) with the description of four new species. Journal of Zoological Systematics and Evolutionary Research, Vol. 52 (3), p. 190-202. ISSN 0947-5745. eISSN 1439-0469. Article.

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DOI: 10.1111/jzs.12058

Abstract

Four new species of Otoplanidae (Platyhelminthes: Rhabditophora: Proseriata) with ranges restricted to the central Mediterranean are described. These species are characterized by the presence of a tubular copulatory stylet and by a bursa lacking an open connection to the atrium. Both characters are novel for the family Otoplanidae. The four species differ mainly in details of the morphology of the sclerotized structures of the copulatory organ. Generic attribution of the new species has been problematic. Morphological characters shared with either Parotoplanina or Parotoplanella were detected. Molecular data (based on 18S rRNA and 28S D1-D6 rRNA genes) evidenced that the new species constitute a monophyletic group falling within species of Parotoplana, with a sister/taxon relationship with Parotoplana spathifera. The genus Parotoplana, however, appears to be paraphyletic, as Parotoplanella progermaria nests within Parotoplana species. The inadequate molecular sampling, combined with the lack of sequences from the type species of both Parotoplana and Parotoplanina, suggested a cautionary taxonomic approach, and the new species are therefore attributed to the earliest generic taxon available, Parotoplana.

Item Type:Article
ID Code:10105
Status:Published
Refereed:Yes
Uncontrolled Keywords:Microturbellarians, taxonomy, biodiversity, molecular analysis, phylogeny
Subjects:Area 05 - Scienze biologiche > BIO/05 Zoologia
Divisions:001 Università di Sassari > 01-a Nuovi Dipartimenti dal 2012 > Scienze della Natura e del Territorio
Publisher:Blackwell / Wiley
ISSN:0947-5745
eISSN:1439-0469
Deposited On:16 Sep 2014 12:32

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