New species of Dermoergasilus Ho & Do, 1982 (Copepoda: Cyclopoida: Ergasilidae) parasitizing endemic cichlid Paretroplus polyactis (Bleeker) in Madagascar

Dermoergasilus madagascarensis n. sp. is described from the gills of Paretroplus polyactis, an endemic cichlid fish in Madagascar, using a combined morphological (light microscopy and SEM) and molecular approach (partial 18S rDNA, 28S rDNA, and COI sequences). The new species is characterized mainly...

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Bibliographic Details
Published in:	Parasitology Vol. 151; no. 3; pp. 319 - 336
Main Authors:	Míč, Robert, Řehulková, Eva, Šimková, Andrea, Razanabolana, Jeanne Rasamy, Seifertová, Mária
Format:	Journal Article
Language:	English
Published:	Cambridge, UK Cambridge University Press 01-03-2024
Subjects:	Animals Aquatic ecosystems Biodiversity Cichlids Cichlids - genetics COI Conservation biology Copepoda - genetics Crustaceans Dermoergasilus diversity DNA, Ribosomal - genetics Ergasilidae Fish Gene sequencing Gills Light microscopy Madagascar Mitochondrial DNA Morphology New species Nucleotide sequence Optical microscopy Parasites parasitic crustaceans Paretroplus polyactis Phylogenetics Phylogeny rDNA Segments Setae Spinules Swimming Madagascar Queensland Australia Philippines Japan South Africa Iraq Australia Western Australia Australia Shatt-al-Arab India Kolkata India Ergasilidae rDNA diversity Dermoergasilus phylogeny Madagascar parasitic crustaceans COI Cichlids
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Summary:	Dermoergasilus madagascarensis n. sp. is described from the gills of Paretroplus polyactis, an endemic cichlid fish in Madagascar, using a combined morphological (light microscopy and SEM) and molecular approach (partial 18S rDNA, 28S rDNA, and COI sequences). The new species is characterized mainly by possessing: (i) roughly pentagonal cephalosome; (ii) antennal endopodal segments covered with slightly inflated membrane; (iii) maxillule bearing 2 equally long outer setae and a minute inner seta; (iv) interpodal sternites of swimming legs ornamented with 3–4 rows of spinules; (v) genital segment and first abdominal somite both barrel-shaped; and (vi) a caudal ramus projecting into a digitiform process with inconspicuous terminal seta and bearing 3 terminal setae. The obtained DNA sequences of Malagasy species represent the first molecular data for species of Dermoergasilus. The 28S rDNA phylogeny showed the affiliation of D. madagascarensis n. sp. to Ergasilidae and its sister relationship with cosmopolitan Ergasilus sieboldi von Nordmann, 1832. The first checklist for all species of Dermoergasilus is provided.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	0031-1820 1469-8161
DOI:	10.1017/S0031182024000088