A new species and a new genus of the family Axinidae (Polyopisthocotyla: Mazocraeidea) parasitic on Japanese halfbeak Hyporhamphus sajori (Beloniformes: Hemiramphidae) collected from the Seto Inland Sea, Japan.
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Abstract
A new genus and species of monogenean belonging to Axinidae, Ondoella sajori n. g., n. sp., is described based on specimens collected from the gill of Japanese halfbeak, Hyporhamphus sajori (Temminck & Schlegel) (Beloniformes: Hemiramphidae) from the Seto Inland Sea, Japan. Ondoella n. g. differs from all other genera of axinids mainly by the possession of an unarmed cirrus. Ondoella n. g. is characterised by the following features: (i) the spherical cirrus present; (ii) spines on the cirrus absent; (iii) the genital pore with a crown of a row of spines; (iv) the elongate body; (v) the vaginal pore with a horn-like spine, and (vi) vaginal pore dorsolateral. The phylogenetic analysis based on 28S rDNA sequences suggests that O. sajori and Axinidae constitute a monophyletic group. A comprehensive list of parasites known to infect H. sajori provided.
期刊介绍：
Systematic Parasitology publishes papers on the systematics, taxonomy and nomenclature of the following groups: Nematoda (including plant-parasitic), Monogenea, Digenea, Cestoda, Acanthocephala, Aspidogastrea, Cestodaria, Arthropoda (parasitic copepods, hymenopterans, mites, ticks, etc.), Protozoa (parasitic groups), and parasitic genera in other groups, such as Mollusca, Turbelleria, etc. Systematic Parasitology publishes fully illustrated research papers, brief communications, and fully illustrated major revisions. In order to maintain high standards, all contributors describing new taxa are asked to state clearly where the holotype is deposited and to make paratypes available for examination by the referees. It is recognized that, in some cases, this may cause problems for the authors, but it is hoped that by adhering to this rule authors may be protected against rapid synonymy of their taxa, and the types will be preserved for posterity.
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