Lohmannella antarctica Newell, 1984

Abé, Hiroshi, 2021, Taxonomic review of the subfamily Lohmannellinae (Acari: Trombidiformes Halacaridae) with morphological comparisons among genera, Zootaxa 4980 (2), pp. 201-255 : 209

Lohmannella antarctica Newell, 1984

Diagnosis. One cornea present. Glp-1 posterior to Ds-1. Ds-2 on membranous cuticle. Ds-3 on PD. Two dorsal setae on PE. Female with 16–18 Pgs and 8 Sgs. Male with 54 Pgs and 8(?) Sgs. Tr I–IV with 1-1-1-1 setae; Bf I–IV with 3-3-3-3 setae; Tf I–IV with (7,8)-(7,8)-6-6 setae; Gn I–IV with 8-(7,8)-4-4 setae, 4-?-0-0 Bp setae; Tb I–IV with 12-(10,11)-(7,8)-7 setae, 6-(3-5)-(3,4)-(3,4) Bp setae; Ta I–IV with 3-3-4-3 dorsal setae, 2-(1,2)-2-(1,2) Bp setae. Lc I with either no or unidentate accessory process. Idiosoma length 430–470 in female, 420–430 in male. Idiosoma width 350 ( idiosoma length 447). Gnathosoma length 230–270 in adults. Gnathosoma width 101 ( gnathosoma length 267). Ratio of gnathosoma to idiosoma 0.55–0.60 in adults. Ratio of P-2 to P-1 4.17.

Remarks. The species resembles L. reticulata , but differs from the latter in that Glp-3 closer to the lateral margin of OC, Ds-5 close to Glp-4, and basal pair of rostral setae in distal half of the rostrum. Female, male, nymphs (stages are unclear), and LV are known.

Habitat. Littoral–Bathyal zones (0–460 m): Crevices formed by hapteres, colonial organisms (bryozoans, etc.), and stranded Phyllogigas grandifolius (Phaeophyta) .

Distribution. Antarctic Onean: Anvers Is. (Palmer Peninsular), Terre Adélie (Pointe Géologie Archipelago), Ross Is. (McMurdo Station) [ Antarctica].

References. Bartsch (1993b), Newell (1984).

Depository. USNMNHW.