The description of two new species of Chloromyxum from skates in the Argentine Sea reveals that a limited geographic host distribution causes phylogenetic lineage separation of myxozoans in Chondrichthyes

0497721 - BC 2019 RIV FR eng J - Článek v odborném periodiku
Cantatore, M.P.C. - Irigoitia, M.M. - Holzer, Astrid S. - Bartošová-Sojková, Pavla - Pecková, Hana - Fiala, Ivan - Timi, J.T.
The description of two new species of Chloromyxum from skates in the Argentine Sea reveals that a limited geographic host distribution causes phylogenetic lineage separation of myxozoans in Chondrichthyes.
Parasite. Roč. 25, SEP 12 (2018), č. článku 47. ISSN 1252-607X. E-ISSN 1776-1042
Grant CEP: GA ČR(CZ) GBP505/12/G112; GA ČR(CZ) GA16-20744S
Institucionální podpora: RVO:60077344
Klíčová slova: Chloromyxum sp. * SSU rDNA sequences * elasmobranchs * Atlantoraja castelnaui * Zearaja chilensis * Rioraja agassizii
Obor OECD: Zoology
Impakt faktor: 1.958, rok: 2018
https://www.parasite-journal.org/articles/parasite/abs/2018/01/parasite180057/parasite180057.html

During a survey on the myxosporean fauna of Rajiformes from the Atlantic coast of Argentina, in waters off Buenos Aires Province (34 degrees-42 degrees S, 53 degrees-62 degrees W), the gall bladders of 217 specimens belonging to seven species of skates, representatives of two families, were examined. As a result, three species of Chloromyxum Mingazzini, 1890, namely C. atlantoraji n. sp., C. zearaji n. sp. and C. riorajum Azevedo, Casal, Garcia, Matos, Teles-Grilo and Matos, 2009 were found infecting three endemic host species, the spotback skate Atlantoraja castelnaui (Arhynchobatidae), the yellownose skate Zearaja chilensis (Rajidae) and the Rio skate Rioraja agassizii (Arhynchobatidae), respectively. These species were described based on myxospore morphology and morphometry characterization, as well as by providing their small subunit ribosomal DNA (SSU rDNA) sequences. The SSU rDNA-based phylogenetic analyses showed that these three species constituted a well-established monophyletic subclade within the marine Chloromyxum Glade, while branches subtending the other Chloromyxum species were poorly resolved or unresolved, independently of the host taxonomic identities (Carchariniformes, Myliobatiformes, Orectolobiformes, Pristiophoriformes, Rajiformes, Squaliformes and Torpediniformes) and/or host geographic distribution (Atlantic coast of Portugal, Atlantic coast of the USA, Australian waters or Mediterranean Sea). The possible causes of these discrepancies are discussed, providing new insights into the phylogeny of the marine Chloromyxum Glade.
Trvalý link: http://hdl.handle.net/11104/0290253