Lohmannella steueri Viets, 1940

Abé, Hiroshi, 2021, Taxonomic review of the subfamily Lohmannellinae (Acari: Trombidiformes Halacaridae) with morphological comparisons among genera, Zootaxa 4980 (2), pp. 201-255 : 220

Lohmannella steueri Viets, 1940

Diagnosis. Two corneae present. Ds-2 on membranous cuticle. Ds-3 on membranous cuticle. One dorsal seta on PE. Female with 27 Pgs and 8 Sgs. Male with 42–53 Pgs and 8 Sgs. Tr I–IV with?-0-?-1 setae; Bf I–IV with 3-2-3-1 setae; Tf I–IV with 6-6-4-3 setae; Gn I–IV with 6-6-5-4 setae, 3-0-0-0 Bp setae; Tb I–IV with 10-9-5-5 setae, 5-3- 0-0 Bp setae; Ta I–IV with 3-3-4-3 dorsal setae, 1-1-2-1 Bp setae. Lc I with unidentate accessory process. Idiosoma length 328–345 in female, 335 in male, 289 in nymph. Idiosoma width 260 in female, 240 in male. Gnathosoma length 165–178 in female, 159 in male, 123 in nymph. Gnathosoma width 75 in female. Ratio of gnathosoma to idiosoma 0.50–0.53 in female, 0.48 in male, 0.43 in nymph. Ratio of P-2 to P-1 3.40.

Remarks. The species is characterized by smooth dorsal plates, Ds-4 and Ds-5 on membranous cuticle, Tb I with 5 Bp setae, and smooth Lc. Female, male, and nymphs (stages are unclear) are known. Holotype is deposited in the Viets Collection (No.5506) in ZIZMH.

Habitat. Sublittoral zone: Sediment with bivalves ( Arca noah ), sponges ( Geodia sp. ), and algae: Peyssonnelia sp. (Rhodophyta) , Udothea sp. (Chlorophyta) at 25–28 m depth.

Distribution. Mediterranean: Val di Bora (Rovinj) [ Croatia].

References. Bartsch (1977b, 1986b), Viets (1940, 1950a).

Depository. ZIZMH.