Porolohmannella Viets, 1933

Abé, Hiroshi, 2021, Taxonomic review of the subfamily Lohmannellinae (Acari: Trombidiformes Halacaridae) with morphological comparisons among genera, Zootaxa 4980 (2), pp. 201-255 : 222

Genus Porolohmannella Viets, 1933

Type: Porolohmannella violacea ( Kramer, 1879)

Diagnosis. Idiosoma flattened. Idiosomal plates delicately reticulated. Dorsum with 6 pairs of setae and 4 pairs of Glps. Adanal setae absent. Female GA with Pgs. Sgs absent. GS furnished with external genital acetabula. Gnathosoma almost half length of idiosoma . Rostrum slender, parallel-sided, with a pair of maxillary setae on the base. Palpi slender, 4-segmented; both separated from each other by about width of P-1. P-2 with a single seta. Legs slender; the first and second legs similar in size. Ta I with a dorsal papillla. Lc crescent-like, with accessory process and fine comb. Median claw undeveloped. The general structures of the genus is schematically shown in Fig. 5 .

Remarks. The genus was established by Viets (1933) as P. violacea the type. At present, a single species is included in the genus. P. husmanni Teschner, 1969 and P. fortipalpis Teschner, 1988 are not regarded as halacarid mites. P. andrei Angelier, 1951 , P. curvimandibulata Petrova, 1969 , and P. vietkovi Petrova, 1965 were moved into the genus Lohmannella on the basis of the similarities in the number of setae on PE and genital sclerite, and chaetotaxy of palpi and legs ( Bartsch 1996a). The genus inhabits freshwater and rarely brackishwater and is widely distributed in Holarctic region.

References. Bartsch (1989c, 1996a, 2006a, 2007b), Viets (1933).

Figures

FIGURE 5. Schematic diagram of general structures of the mite body in Porolohmannella.