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Observations on the Subgenus Argas (Ixodoidea: Argasidae: Argas). 19. Description of the Larva of the Palearctic Cormorant Parasite A. (A.) macrostigmatus

Larvae of 19 of the 21 species of the Argas subgenus Argas are already described. One of the two exceptions is A. (A.) macrostigmatus; we describe the larva of this species from wet nests of the crested cormorant, Phalacrocorax aristotelis, from Corsica, France. As in the adult and nymphal stages, t...

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Bibliographic Details
Published in:The Journal of parasitology 1984-04, Vol.70 (2), p.292-294
Main Authors: Hoogstraal, Harry, Wassef, Hilda Y., Guiguen, Claude, Beaucournu, Jean-Claude
Format: Article
Language:English
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Summary:Larvae of 19 of the 21 species of the Argas subgenus Argas are already described. One of the two exceptions is A. (A.) macrostigmatus; we describe the larva of this species from wet nests of the crested cormorant, Phalacrocorax aristotelis, from Corsica, France. As in the adult and nymphal stages, this larva has an uncovered Haller's organ, a character shared in Palearctic members of this large genus only with A. (A.) polonicus, a Central European parasite of rock pigeons. Available larval samples of both species are indistinguishable. However, adult and nymphal A. (A.) macrostigmatus are unique for their exceptionally large spiracular plates. These are the only Argas (Argas) species which differ distinctly as adults and nymphs but hardly or not at all as larvae. Argas (A.) macrostigmatus was previously known only from a nest of the crested cormorant in the Black Sea, Ukrainian SSR.
ISSN:0022-3395
1937-2345
DOI:10.2307/3281879