Antarctic Halacaroidea by Irwin M Newell

By Irwin M Newell

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Published through the yankee Geophysical Union as a part of the Antarctic learn 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 taken care of while zoogeographically major. Species from Chile and the southeast Pacific are integrated, and some species recorded from Peru and South Africa. Mites have been accrued from quite a few 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 relations ranks: Rhombognathidae, Lohmannellidae, and Halacaridae. The well-known 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; a hundred and fifteen new species are defined; six new synonymies are demonstrated; 3 subspecies are given particular prestige; and 3 species are renamed. Tabular keys to the genera and species are provided (including taxonomically very important species teams from different regions). The constitution of the Halacaroidea is reviewed. innovations for amassing, sorting, and mounting Halacaroidea are given.

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However, the present author [Newell, 1953], using a detailed analysis of the distribution of the variants of 14 characters among all Rhombognathidae, showed that Viets' suppres- and Palpal shorter than telofemur II. Carpite of each tarsus forming a moniliform flexible extension the This cosmopolitan genus is more commonin the southern hemisphere than present records indicate. Species of Isobactrus are almost and that Isobactrus• Key Group 2000 (ex Key Group 1) This group includes I. macquariensis n.

Female. The single posterior membranous (Figure Rhombo•nathusambi•uus Newell, n. $p. Figs. $etae on each side: aes-I, aes-II-V, ae$-IIlat, and aes-II-adj. Aes-II-lat at very margin of plate. Pe$-III-adj and other setae of 27). side of cuticle behind A single aes-II-lat perigenital foramen. These are $eta on at the level of the posterior margin of the genital foramen. Striated membranous cuticle posterior to level of genital foramen obscured; extent uncertain but probably continuous, as in R. adeliensis.

Newell, 1947, p 28 --Newell and Andre, 1959, p 124 normalR. lumifer. Male with 121 or 23 basilar--setae plus 84, 96 103 or 113 other 1901, p. 283; 1907b, pp. --Andre, i938b, p. 271. lumifer; Newell and Andre, This species was first collected near Tierra del Fuego (Saddle Island) by P. Harlot during the 'Expedition de la Romanche, ' 1882-1883, by Trouessart, who consideredit a variety of •. maõnirostris. It was so considered by all until Newell and Andr• type and showed that magnirostris. it in where of the shows Newell [1959] it subsequent writers redescribed was distinct the from R.

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