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  • H. J. Rowell (a1), D. A. Chant (a1) and R. I. C. Hansell (a1)

The chaetotactic nomenclature proposed by Lindquist and Evans (1965) for the Gamasina, using the family Ascidae as examplar, is adopted for use in the family Phytoseiidae. Probable setal homologies were determined by: examining and comparing ontogenetic relationships in both the Phytoseiidae and Ascidae; standardizing the shape and size of the dorsal shield of exemplars from 7 genera of Phytoseiidae and one of Ascidae in order to compare standardized, transformed setal positions; examining the spatial relationships between setal and pore positions. The technique used to standardize the shape and size of the dorsal shield is described. The setal nomenclature adopted for each of the genera of Phytoseiidae is discussed and presented in diagrammatic form. Ventral chaetotaxy in the Ascidae and Phytoseiidae is also discussed.

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Athias-Henriot, C. 1957. Phytoseiidae et Aceosejidae (Acarina, Gamasina) d'Algérie. I. Genres Blattisocius Keegan, Iphiseius Berlese, Amblyseius Berlese, Phytoseius Ribaga, Phytoseiulus Evans. Bull. Soc. Hist. Nat. Afr. N. 48: 319352.
Athias-Henriot, C. 1975. Nouvelles notes sur les Amblyseiini I — Le relevé organotaxique de la face dorsale adulte (Gamasides Protoadeniques, Phytoseiidae). Acarologia 17: 2029.
Chant, D. A. 1958. Immature and adult stages of some British Phytoseiidae Berl., 1916 (Acarina). J. Linnean Soc. Lond. 43(294): 599643.
Chant, D. A. 1965. The identity and distribution of species of Phytoseius Ribaga (Acarina: Phytoseiidae) in Canada. Can. Ent. 97: 897909.
Chant, D. A. and Hansell, R. I. C.. 1971. The genus Amblyseius (Acarina: Phytoseiidae) in Canada and Alaska. Can. J. Zool. 49: 703758.
Chant, D. A., Hansell, R. I. C., and Yoshida, E.. 1974. The genus Typhlodromus Scheuten (Acarina: Phytoseiidae) in Canada and Alaska. Can. J. Zool. 52: 12651291.
Chant, D. A., Hansell, R. I. C., Rowell, H. J., and Shaul, E. Yoshida. 1978. A study of the family Phytoseiidae (Acarina: Mesostigmata) using the methods of numerical taxonomy. Can. J. Zool. 56: 13301347.
Hirschmann, W. 1957. Acarologie. Gangsystematik der Parasitiformes. Teil 1. Gamasiden. Fürth/Bay. pp. 120, I–V pp., 26 pl.
Lindquist, E. E. and Evans, G. O.. 1965. Taxonomic concepts in the Ascidae, with a modified setal nomenclature for the idiosoma of the Gamasina (Acarina: Mesostigmata). Mem. ent. Soc. Can. 47. 64 pp.
McMurtry, J. A. 1977. Description and biology of Tryphlodromus persianus n. sp., from Iran, with notes on T. kettaneki (Acari: Mesostigmata: Phytoseiidae). Ann. ent. Soc. Am. 70: 563568.
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The Canadian Entomologist
  • ISSN: 0008-347X
  • EISSN: 1918-3240
  • URL: /core/journals/canadian-entomologist
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