Phylogenetic analysis and reconfiguration of genera in the cestode order Diphyllidea

0396391 - BC 2014 RIV AU eng J - Článek v odborném periodiku
Caira, J. N. - Marques, F.P.L. - Jensen, K. - Kuchta, Roman - Ivanov, V.
Phylogenetic analysis and reconfiguration of genera in the cestode order Diphyllidea.
International Journal for Parasitology. Roč. 43, č. 8 (2013), s. 621-639. ISSN 0020-7519. E-ISSN 1879-0135
Institucionální podpora: RVO:60077344
Klíčová slova: Elasmobranchs * 28S rDNA * 18S rDNA * Ahamulina * Coronocestus * Ditrachybothridium * Echinobothrium * Halysioncum
Kód oboru RIV: EB - Genetika a molekulární biologie
Impakt faktor: 3.404, rok: 2013

subunit), and COI (cytochrome oxidase subunit I) sequence data for 31 species representing morphological variation across the order. Trees resulting from these analyses yielded a number of well-supported clades that are congruent with unique morphological features mandating generic revision of the order and erection of at least two new genera. Species originally assigned to Echinobothrium van Beneden, 1849 but bearing a corona of spines on the region of the scolex anterior to the bothria and posterior to the apical organ armature are transferred to Coronocestus n. gen.; members of this genus typically parasitize triakid sharks, although one report from a hemiscylliid shark exists. Species with lateral hooklets arranged in continuous bands, rather than in two distinct clusters, are transferred to Halysioncum n. gen.; all species parasitize batoids, mostly myliobatids and rhinopterids, but a few records also exist from arhynchobatids, rhinobatids, platyrhinids and urotiygonids. Our analyses support transfer of the five species originally assigned to Macrobothridium Khalil and Abdul-Salam, 1989 owing to their lack of cephalic peduncle spines to Echinobothrium. As a consequence, Echinobothrium sensu stricto includes species both with and without spines on the cephalic peduncle, but all members of the genus possess lateral hooklets arranged in clusters on either side of the dorsal and ventral apical hooks. With respect to diphyllideans parasitizing catsharks, Ahamulina Marques, Jensen and Caira, 2012 is unique in possessing apical hooks but lacking lateral hooklets and Ditrachybothridium Rees, 1959 is unique in entirely lacking scolex armature.
Trvalý link: http://hdl.handle.net/11104/0224205