Some aspects of the taxonomy, biology, possible evolution and biogeography of nematodes of the spirurine genus Rhabdochona Railliet, 1916 (Rhabdochonidae, Thelazioidea)

0345691 - BC 2011 RIV PL eng J - Journal Article
Moravec, František
Some aspects of the taxonomy, biology, possible evolution and biogeography of nematodes of the spirurine genus Rhabdochona Railliet, 1916 (Rhabdochonidae, Thelazioidea).
Acta Parasitologica. Roč. 55, č. 2 (2010), s. 144-160. ISSN 1230-2821. E-ISSN 1896-1851
R&D Projects: GA MŠMT LC522
Institutional research plan: CEZ:AV0Z60220518
Keywords : Rhabdochona * evolution * freshwater fish
Subject RIV: GJ - Animal Vermins ; Diseases, Veterinary Medicine
Impact factor: 1.144, year: 2010

It appears that, during the evolution of Rhabdochona spp., there occur an increase of the number of anterior prostomal teeth and the lost of lateral alae, the right spicule attains a boat-like shape and a dorsal barb develops on its distal tip, and the distal tip of the left spicule attains gradually a more complex structure; the eggs with a smooth surface are considered to be more primitive. Nematodes of this genus most probably originated in the region of present southern Asia at the beginning of Tertiary. Closest to the initial type appear to be members of the subgenus Globochona Moravec, 1972, from which lineages leading to the subgenera Globochonoides Moravec, 1975, Rhabdochona Railliet, 1916 and Sinonema Moravec, 1975 can be derived. The morphology of Rhabdochona spp. indicates a close relation of the Palaearctic fauna of these nematodes with the Nearctic species, and the Oriental fauna with the Ethiopian fauna.
Permanent Link: http://hdl.handle.net/11104/0186901