Lobohalacarus weberi (Romijn and Viets, 1924)

Bartsch, I., 2013, Freshwater Halacarid Mites (Acari: Halacaridae) From Madagascar. New Records And The Description Of A New Species, Acarologia 53 (1), pp. 77-87 : 80

Lobohalacarus weberi (Romijn and Viets, 1924)

Material examined — One female (slide), ZMH, one female (in ethanol) ZMH; northern Madagascar, Antisiranana, Andapa, right affluent River Ambendrana downstream, large cascade, 600 m; 11 Nov. 2001; coll. R. Gerecke and T. Goldschmidt. Two deutonymphs (in ethanol) ZMH; Center of Madagascar, Antanarivo , Anjazarobe , River Ranonisoanavola (stream east from main mountain stream), 1200 m; 23 Jul. 2001; coll. R. Gerecke and T. Goldschmidt. One deutonymph (in ethanol) ZMH; south central Madagascar, Fianarantsoa, Ionilahy , small stream crossing the railroad east of village, 200 m; 15 Aug. 2001; coll. R. Gerecke and T. Goldschmidt .

Diagnosis (female, Madagascar individuals) — Length 284 – 304 µm. With frontal spine. Dorsal plates uniformly foveate. Genital sclerites with two and three acetabula, genital area with five pairs of perigenital setae. Telofemora III and IV with 2/0 dorsal/ventral setae. Ventral flank of genu I on one leg with spur and seta, on other leg with two spurs; each ventral flank of tibiae II to IV with one smooth and two pectinate setae, tarsi III with 4/1 dorsal/ventral setae, and tarsi IV with 3/1 setae. Length of deutonymphs 234 – 244 µm.

Remarks — In Lobohalacarus weberi in general, character states are known to vary in individuals from different localities but also within a population (cf. Bartsch 2007b, 2011b). From Madagascar only two adults were available for study.

Distribution — Cosmopolitan with records from Africa, Europe, Asia, Australia, New Zealand, North and South America, and Oceanic Islands ( Bartsch 2008a: fig. 1; Peši´c et al. 2010).