Lobogynium Trägårdh

Plumari, Massimo & Kazemi, Shahrooz, 2012, Redescription and neotype designation of Lobogynium sudhiri (Datta) (Acari: Diplogyniidae), a mite associated with beetles of the genus Atholus (Thomson) (Coleoptera: Histeridae) in the Palaearctic region, Zootaxa 3352, pp. 1-16 : 4

Genus Lobogynium Trägårdh

Lobogynium Trägårdh, 1950: 392 . Type species Lobogynium rotundatum Trägårdh, 1950 , by monotypy.

Diagnosis (adults). Body shape widely rounded. Dorsal shield markedly heterotrichous, with four pairs of longer setae (with barbed tip) in medio-lateral or submarginal series; postero-marginal setae Z5 long; postero-marginal setae S5 shorter than setae Z5, but longer than other spine-like marginal setae; other dorsal setae very short or vestigial ( Fig. 1 ). Ventri-anal shield not extending to posterior margin of idiosoma; ventri-marginal shields well defined, completely separated from ventri-anal shield and each other, with wide posterior ends meeting posteriorly to ventri-anal shield and one pair of setae; stigmata between coxae III and IV; peritremes long, extending beyond coxa I ( Figs 3 , 5 ). Sternal shield with large anterior portion, posterior margin deeply concave, postero-lateral prolongations well defined and three pairs of setae ( Fig. 4 A). Metasternal shields separate or fused together along the medial margins, but completely separated from sternal shield ( Fig. 4 E). Latigynal shields harp-shaped, with anterolateral margins invaginated to form two lobes, or indistinctly bilobed; two pairs of setae placed near the postero-lateral margin of shields; mesogynal shield not fused to ventri-anal shield, with posterior margin well defined ( Fig. 4 B). Legs I antenniform ( Fig. 2 A); one long dorsal seta on genu III and IV ( Figs 7 B, 7C).

Figures

FIGURE 1. Lobogynium sudhiri, dorsal idiosoma. Scale bar = 250 μm.

FIGURE 2. Lobogynium sudhiri. A. Leg I; B. Palp, lateral view (setae of the tibia and tarsus are not all illustrated); C. Gnathosoma, ventral view. Hypopharyngeal styli (Gorirossi, 1989) not illustrated. S = sensillum. Scale bar = 100 μm.

FIGURE 3. Lobogynium sudhiri, female, ventral view. Scale bar = 250 μm.

FIGURE 4. Lobogynium sudhiri, female. A. Sternal shield; B. Genital shields; C. Chelicera, lateral view; D. Epistome; E. Metasternal plate with vaginal sclerites. Scale bar = 100 μm.

FIGURE 5. Lobogynium sudhiri, male, ventral view. Scale bar = 250 μm.

FIGURE 7. Lobogynium sudhiri. A. Leg II; B. Leg III; C. Leg IV. Tarsal sphincter (Elsen, 1975) not illustrated. Scale bar =