Interstitial fauna of the Galapagos: Porrocystidinae (Platyhelminthes Polycystididae)
作者:
T.J. Artois,
E.R. Schockaert,
期刊:
Tropical Zoology
(Taylor Available online 1999)
卷期:
Volume 12,
issue 2
页码: 309-324
ISSN:0394-6975
年代: 1999
DOI:10.1080/03946975.1999.10539397
出版商: Taylor & Francis Group
关键词: Porrocystidinae;Polycystididae;Galapagos;new taxa;phylogeny
数据来源: Taylor
摘要:
Three new species, from the Galapagos Isles, of the ill-defined taxon Porrocystidinae Evdonin 1977 are described.Austrorhynchus galapagoensisn. sp. is mainly characterized by the shape of the male accessory organ. The other two species represent new genera:Galapagorhynchus hoxholdin. gen. n. sp. andPygmorhynchus pygniaeusn. gen. n. sp. The main characteristics ofGalapagorhynchusn. gen. are the presence of hard teeth in the male atrium, the lack of an accessory stylet, the long spermatic ducts and the very elongated common genital atrium.Pygniorhvnchusn. gen. lacks an accessory stylet, has short but strongly muscular spermatic ducts and has nuclei near the junction of the epithelia of the proboscis sheath and cone. The systematic positions of the three new taxa are discussed, and a brief phylogenetic analysis of the Porrocystidinae is given. Diagnoses of the new taxa are given, and the diagnosis of the subfamily Porrocystidinae is emended.
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