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On the genus crotonia acari cryptostigmata


Acarologia (Paris) 19(3): 513-539
On the genus crotonia acari cryptostigmata
Redescriptions of C. cophinarius (Mich., 1908) and C. unguifera (Mich., 1908) are based on the original collections in the British Museum (Natural History), and lectotypes are designated. A number of other species belonging to this genus are described: C. chiloensis sp. nov. and C. flagellata (Balogh et Csiszar) from Chile, C. lanceolata sp. nov. and C. brassicae sp. nov. from St. Helena, and C. melanesiae sp. nov. from the New Hebrides. The genus is distinguished from the related Holonothrus mainly by the deficient character of the notogastral chaetotaxy and the development of setal apophyses. Comparisons between 10 spp. presently assigned to the genus Crotonia suggest that 2 distinct morphological groupings, designated the C. cophinarius [with C. cophinarius, C. chiloensis, C. lanceolata, C. brassicae, C. brachyrostrum and C. brevicornuta] and C. unguifera [with C. unguifera, C. flagellata, C. obtecta and C. melanesiae] groups, respectively, may be recognized. The zoogeographical distribution of both of these groupings is discontinuous, but may represent a relic of an earlier more extensive, continuous pattern.

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Accession: 006027453



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