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Four new species of Mesomyzostoma (Myzostomida: Annelida)
Rouse, G.W.; Lanterbecq, D.; Summers, M.M.; Eeckhaut, I. (2016). Four new species of Mesomyzostoma (Myzostomida: Annelida). J. Nat. Hist. 50(1-2): 1-23.
In: Journal of Natural History. Taylor & Francis: London. ISSN 0022-2933, more
Peer reviewed article  

Available in Authors 

Author keywords
    Parasitism; taxonomy; phylogeny; Echinodermata

Authors  Top 
  • Rouse, G.W.
  • Lanterbecq, D., more
  • Summers, M.M.
  • Eeckhaut, I., more

    Mesomyzostoma Remscheid, 1918 currently includes three described species that live in the coelom and/or gonads of comatulid crinoids: Mesomyzostoma reichenspergeri Remscheid, 1918, Mesomyzostoma katoi Okada, 1933 and Mesomyzostoma lanterbecqae Summers and Rouse, 2014 in Summers, Al-Hakim et al. 2014. Here we describe four new species of Mesomyzostoma and assess their phylogenetic relationships using 18S rRNA, cytochrome oxidase subunit I and 16S rRNA sequence data. We also designate a neotype for M. katoi as the original types appear to be lost. We record M. reichenspergeri from the Australian Great Barrier Reef and from northern Papua New Guinea, but samples from the type locality (Aru Islands, Indonesia) and previously recorded host are needed for confirmation. The new species of Mesomyzostoma are one Japanese species: Mesomyzostoma okadai sp. nov., and three Australian species: Mesomyzostoma lobus sp. nov., Mesomyzostoma leukos sp. nov. and Mesomyzostoma botulus sp. nov. The first infects the coelom of crinoid arms and pinnules, and the other three are found in crinoid oral discs. We also record M. leukos sp. nov. and M. botulus sp. nov. from Papua New Guinea. Phylogenetic analyses suggest that M. okadai sp. nov. is the sister group to all other Mesomyzostoma.

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