Atractides pygmaeus (Motas & Tanasachi, 1948)

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 : 256-257

ATRACTIDES PYGMAEUS (MOTA Ş & TANASACHI, 1948)

( FIG. 51A–G )

Megapus pygmaeus Motaş & Tanasachi, 1948

Type series: Missing. Locus typicus: Romania, Carpates Méridionales; Vallée du Rîuşor (le Ruisseau) affl. de la Dâmbovitza (dép. De Muscel) le 20/X/1948, 1 ♂, 2 ♀ .

Material examined: CSM, Egg , Atractides pygmaeus ♀ (collecting site: Austria, Bregenzer Wald , Schwarzach unterhalb Alberschwende , Juli und Oktober, 1961, 2 ♂, 1 ♀ – the ♂ no longer available) .

Description:

General features

Combined from Motaş et al. (1958), and Schwoerbel (1962)

dorsal integument: smooth; muscle attachments: postoc and Dgl-4 on enlarged sclerites, D-2 occasionally sclerotized as a minute knob; V-1–4 not sclerotized coxal field: slender and longish, mediocaudal margin Cx-1 tongue-shaped, caudal margin Cx-4 oblique, directed anteriomedially

I-L: I-L-5/6 little modified, S-1 and -2 slender, closely together, I-L-6 straight, with strong claw; excretory pore: unsclerotized; Vgl-1: fused to Vgl-2

palp: weak sexual dimorphism; ventral margin of P-2 and P-3 straight, P-2 forming an acute ventrodistal angle; P-4 slender, hair insertions dividing the ventral margin 1: 1: 1, near a pronounced denticle, sword seta fine, near the distoventral hair

G

Males

Combined from Motaş et al. (1958), and Schwoerbel (1962) genital field: round, with slightly convex anterior, and slightly concave posterior margins, gonopore short; genital setae: 22 palp: P-4 slightly more robust than in females and with more dense dorsal hair cover idiosoma L/W 320/195 (390/200); glandularia – coxal field L 182; Cx-1 + 2 mL 60 I-L: dL I-L-5/6 1.0 S-1/2 – genital field L/W 57/58, Ac-1–3 – gnathosoma vL 57; chelicera L 100, L/H –, bS/claw 2.3

Figures

Figure 51. A–G, Atractides pygmaeus, A–C, ♀ from Austria, D–F, after Motaş et al. (1958); G, after Pešic ¢ (2001). A, ♀ idiosoma, dorsal view; B, ♀ idiosoma, ventral view; C, ♀ I-L-5 and -6, Scale bars = 100 µm; D, ♂ ventral idiosoma; E, ♂ I-L-5 and -6; F, ♂ genital field; G, ♂ palp, medial view. H, I, Atractides microphthalmus ♂ after Motaş et al. (1958). H, palp; I I-L-5 and -6.