Atractides subasper, Koenike, 1902

Gerecke, Reinhard, 2003, Water mites of the genus Atractides Koch, 1837 (Acari: Parasitengona: Hygrobatidae) in the western Palaearctic region: a revision, Zoological Journal of the Linnean Society 138, pp. 141-378 : 178-180

ATRACTIDES SUBASPER KOENIKE, 1902 ( FIG. 20A–H )

Type series: Lectotype, designated here, NHUB 588 , Megapus subasper Koen. ♂ Type; Lüneburger Heide, Böhme, in einem Sturzbache. H.Müller coll. VII, 1902. State of conservation: good, dorsal shield with several cracks, left I-L-5 and -6 missing . Paralectotypes: NHUB 589 ♂ , NHUB 590 ♀ , one slide with nine specimens (2/4/3) desiccated, re-prepared and mounted on two slides (1/2/ 2 in Euparal, 1/2/1 on the original slide in Hoyer’s fluid); all labelled like lectotype . SMNH 587 , labelled like lectotype, ♂ . State of conservation: good, but mounting medium has partially retreated from the subjects. SMNH 591 , Sturzbach der Böhme im Allergeb. , Juli, 1901 ♀ , State of conservation: good, mounting medium perfect.

Material examined: Sicily, I 485, Trapani, Fiume Fittasi near ponte Fittasi TB 95 99, 7.9.1986 Gerecke, 4/3/1

Description:

General features dorsal integument: striated (6–9/10 Mm); muscle attachments: sexual dimorphism (dorsal shield in males), glandularia enlarged I-L: I-L-5 S-1 and -2 close together, similar in shape, strong and short with rounded tips; I-L-6 weakly curved, only slightly narrowed distally excretory pore: smooth; Vgl-1: in females not fused to Vgl-2, in males agedependent (fused to Vgl-2 only in older, strongly sclerotized specimens) gnathosoma with pointed, protruding rostrum chelicera with long, needle-like claw palp: sexual dimorphism, P-5 thickened and short

Males

Lectotype dorsum: dorsal shield including frontalia and Dgl-3–6

coxal field: extended secondary sclerotization including Vgl-1

genital field: transversely oval, convex anterior and posterior margins of secondary sclerotization, sometimes fused to posterior margin of coxal field; Ac rather small, subtriangular palp: P-2 with a truncate ventrodistal hump, P-3 ventral margin concave, P- 4 ventral margin 2: 2: 1, sword seta between ventral setae, nearer to proximoventral hair idiosoma 450/–; glandularia 45

coxal field L 302; Cx-3 W 338; Cx-1 + 2 mL 135, IL 229, W 247

I-L-5 dL 152, vL 114, dL/vL 1.33, HA-HC 35, 44, 49, dL/HB 3.45

S-1 L 68, L/ W 9.7, S-2 L 62, L/ W 8.9, interspace 8, L S-1/2 1.10

I-L-6 L 105, HA-HC 25, 22, 23, dL/HB 4.77; L I-L-5/6 1.45

genital field L/W 94/126, Ac-1–3 L 30, 24, 25

gnathosoma vL 130; chelicera L 219, L/H 4.87, bS/claw 1.64

Figures

Figure 20. Atractides subasper. A, B, lectotype ♂ NHUB 588; C, paralectotype ♂ NHUB 589; D, E paralectotype ♀ NHUB 590; F, ♂ paralectotype SMNH 587; G, ♀ Sicily I485; H, ♂ Sicily I485. A, ♂ I-L-5 and -6; B, ♂ palp, medial view; C, ♂ idiosoma, ventral view; D, ♀ genital field, E, ♀ palp, medial view; F, ♂ chelicera; G, ♀ dorsum; H, ♂ dorsum. Scale bars = 100 µm.