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Two new species of the genus Duplacrorhynchus Schockaert & Karling, 1970, with remarks on relationships within the genus and on the Duplacrorhynchinae (Platyhelminthes, Polycystididae)
Artois, T.; Schockaert, E. (1999). Two new species of the genus Duplacrorhynchus Schockaert & Karling, 1970, with remarks on relationships within the genus and on the Duplacrorhynchinae (Platyhelminthes, Polycystididae). Belg. J. Zool. 129(1): 235-244
In: Belgian Journal of Zoology. Koninklijke Belgische Vereniging voor Dierkunde = Société royale zoologique de Belgique: Gent. ISSN 0777-6276; e-ISSN 2295-0451, more
Also appears in:
Mees, J. (Ed.) (1999). Proceedings of the 5th Benelux Congress of Zoology Gent, 6-7 November 1998. Belgian Journal of Zoology, 129(1). Koninklijke Belgische Vereniging voor Dierkunde = Société royale zoologique de Belgique: Brussel. 324 pp., more
Peer reviewed article  
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Keywords
    Duplacrorhynchus Schockaert & Karling, 1970 [WoRMS]; Platyhelminthes [WoRMS]; Polycystididae Graff, 1905 [WoRMS]
    Marine/Coastal
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Abstract
    Two new species of Polycystididae are described: Duplacrorhynchus megalophallus sp. nov. from the bay of Marseille (France) and D. heyleni sp. nov. from Zanzibar (Tanzania). The female system of both is characterized by the presence of a muscular bulb at the proximal end of the bursal stalk, with three strong teeth in D. megalophallus, and in D. heyleni the muscle bulb is highly asymmetric. In D. megalophallus the copulatory bulb is divided by a septum, and the cirrus has small spines and a proximal umbrella-like expansion. In D. heyleni only the cirrus, which has strong teeth, is enclosed in the cirrus sack: the seminal and prostate vesicles are not. Relationships with the two known species of the genus (D. minor Schockaert & Karling, 1970 and D. major Schockaert & Karling, 1970) are discussed. The subfamily Duplacrorhynchinae Schockaert & Karlinger, 1970 may constitute a monophyletic taxon, characterised by the 3+2 configuration of the proboscis prostate vesicle. The taxon Duplacrorhynchus may be the sister taxon of all these genera.
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