Antarctic Halacaroidea by Irwin M Newell

By Irwin M Newell

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Published through the yank Geophysical Union as a part of the Antarctic study Series.

The Halacaroidea (Acari) from the Antarctic and sub-Antarctic (including Tierra del Fuego, Falkland Islands, South Georgia, South Sandwich Islands, Kerguelen, Macquarie Islands, and Auckland Island) are defined. Halacaroidea from north of range 50°S are handled whilst zoogeographically major. Species from Chile and the southeast Pacific are incorporated, and some species recorded from Peru and South Africa. Mites have been amassed from a number of intertidal and subtidal habitats to a intensity of 4100 m. The sub-families Rhombognathinae Viets, Lohmannellinae Viets, and Halacarinae Murray are raised to the corresponding family members ranks: Rhombognathidae, Lohmannellidae, and Halacaridae. The common composition of the latter teams is modified. Fifteen genera are clinically determined: Acatacarus Schulz, Agaue Lohmann, Agauopsis Viets, Arhodeoporus Newell, Bradyagaue Newell, Copidognathus Trouessart, Halacarus Gosse, Isobactrus Newell, Lohmannella Trouessart, Parahalixodes Laubier, Rhombosnathus Trouessart, Scaptognathus Trouessart, Simognathus Trouessart, Thalassarachna Packard, and Werthella Lohmann. 3 new genera, Camactognathus, Mictognathus, and Winlundia, are proposed; one hundred fifteen new species are defined; six new synonymies are tested; 3 subspecies are given particular prestige; and 3 species are renamed. Tabular keys to the genera and species are awarded (including taxonomically very important species teams from different regions). The constitution of the Halacaroidea is reviewed. strategies for amassing, sorting, and mounting Halacaroidea are given.

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Of corneae 2 (both and in the female in the male illustrated Known only from Kerguelen. Kerguelen Island, Indian Ocean, north of Ronarc'h Peninsula, Bay of Morbihan, Port Douzi•me, on roots of Durvillea antarctica, February 1966, J. C. ANTARCTIC HALACAROIDEA Rhombo•nathusplumifer Trouessart Rhombo•nathusma•nirostris 29 Diagnosis. one dorsal, var. plumifer Trou- Basifemur II with two setae, one ventralß Posterodorsal with two pairs of setae. Perigenital plate setae of essart, 1889b, p. 231; 1891, pp.

Figs. 29-35 This species is described from a single specimen kindly sent to me by Keith Watson of the Division of Wildlife Research, CSIRO, Canberra, Australia. Female. Idiosoma of the only female 548• 31 Fig. 29, dorsum; Fig. 30, tip of tarsus II, left, posterodorsal; Fig. 33, venter; Fig. 34, tip of tarsus I, long; highly compressed(gummount). 34; dorsal setae 1 only 6 • long, stout, spikelike. Ocular plates (Figure 29) longer than broad. Single cornea hyaline. Dorsal setae 2 medial to ocular plates, spiniform; dorsal setae 3 as shown in figure.

41, subgenital setae. of eight setae. Tarsus III (Figure 39) with three dorsal fossary setae and three parambulacral setae, for a total of six setae. 2 the length of the dorsal member (Figure 40). Tarsus IV with three dorsal fossary setae, no ventral setae, and two parambulacral setae, for a total of five setae. The anterior parambulacral seta is heavy, spiniform, dentate (Figure 38), the posterior one is a slender hemieupathid, sharply stepped in the basal portion. Claws without basal hook but with an extremely fine unidentate accessory process (hence the specific name).

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