Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/33930
Title: Taxonomy and phylogeny of Koinocystididae (Platyhelminthes, Kalyptorhynchia), with the description of three new genera and twelve new species
Authors: DIEZ GARCIA, Yander 
MONNENS, Marlies 
Aguirre, Rosa Isabel
Yurduseven, Rana
JOUK, Philippe 
VAN STEENKISTE, Niels 
Leander, Brian S
SCHOCKAERT, Ernest 
REYGEL, Patrick 
SMEETS, Karen 
ARTOIS, Tom 
Issue Date: 2021
Publisher: MAGNOLIA PRESS
Source: ZOOTAXA, 4948 (4) , p. 451 -500
Abstract: The taxon Koinocystididae is the third most species-rich family within Eukalyptorhynchia. However, its diversity and phylogeny have been largely neglected in former studies. We introduce three new genera and twelve new species of Koinocystididae including Simplexcystis asymmetrica gen. n. sp. n., Galapagetula cubensis sp. n., eight species of Reinhardorhynchus gen. n. and two species of Itaipusa. This raises the total number of species within Koinocystididae from 51 to 63. We also report on new distribution records for six known species: I. divae (Cuba, Panama and New Caledonia), I. karlingi (Sardinia and Lanzarote), Reinhardorhynchus riegeri comb. n. (Cuba), R. ruffinjonesi comb. n. (Cuba and Panama), Utelga heinckei (Cuba and Lanzarote), and U. pseudoheinckei (Sardinia). Simplexcystis asymmetrica gen. n. sp. n. is characterised by a male duct running eccentrically through the copulatory bulb, lack of any hard structures in the male system, lack of a bursa, and the fact that the epithelia of the female, the male, and part of the common atrium are covered by a brush border. Galapagetula cubensis sp. n. has a caudal gonopore, a divisa-type copulatory bulb with an unarmed penis papilla, and a female duct without a sphincter. The new species of Itaipusa and Reinhardorhynchus gen. n. differ from their congeners in the detailed structure of the copulatory bulb and especially the hard structures associated with it. In a molecular phylogenetic analysis based on all available 18S and 28S rDNA sequences of koinocystidids, we found support for the monophyly of the family and the genus Utelga Marcus, 1949. The genus Itaipusa is not monophyletic in that I. sinensis forms a clade with Rhinolasius dillonicus, while other species of Itaipusa that have a copulatory bulb armed with hooks form a clade together with Sekerana stolzi. As the type species of Itaipusa (I. divae) is in neither of these clades, we erected a new genus for I. sinensis (Koinogladius gen. n.) and one for species of Itaipusa having a hook-bearing copulatory bulb (Reinhardorhynchus gen. n.), respectively. Whether the remaining species of Itaipusa form a monophylum remains uncertain.
Keywords: Platyhelminthes, Kalyptorhynchia, microturbellarian, Rhabdocoela, systematics, phylogeny;Animals;Female;Male;Phylogeny;Platyhelminths
Document URI: http://hdl.handle.net/1942/33930
ISSN: 1175-5326
e-ISSN: 1175-5334
DOI: 10.11646/zootaxa.4948.4.1
ISI #: WOS:000632232700001
Rights: 2021 Magnolia Press
Category: A1
Type: Journal Contribution
Validations: ecoom 2022
Appears in Collections:Research publications

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