Atractides pavesii, Maglio, 1905

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 : 327

ATRACTIDES PAVESII MAGLIO, 1905 ( FIG. 85A–I )

Type series: Missing (D. Benfatti, pers. comm.). Locus typicus: River Ticino near Pavia, September/October ( Maglio, 1906) .

Material examined: SMF 7199 , ♀, Italien, Vomano Fl. Moretti coll. 24.6.51; SMF 3698 , ♀, Spanien, Zaragoza, Huerva-Fluss, 30.4.1917 ; SMF 5875 , ♂ ( Germany) Wümme b. Oberneuland, 27.7.1907, Viets coll. ; SMF 1528 , ♀ ( Russia) Ost-Preussen , Alle–Fluss b. Heilsberg X.1902 Protz leg.

Rejected identifications: SMF 6011 ♀ Griechenland Yliki See b. Theben, 7.9.42 Laskar coll. (K. Viets, 1950 = A. acutirostris ]; SMF 7204 ♀ Italien, Iesi , Esino Fl., 30.7.1951 Moretti coll. (K. Viets, 1954 partim = A. acutirostris ) ; SMF KOViets 7246 ♀ Israel Nahal Ortal 26.7.1979 IES 1627 Aca 1148 (unpubl. = A. acutirostris ) ; SMF KOViets 2353 ♀ ( Germany) Grosser Stechlin See Westbucht , 80 cm, 29.10.1960 Mothes leg. (= A. moniezi ) .

Description:

General features dorsal integument: thick, inner layer with a regular pattern of fine crossing lines, locally like a knitting pattern, but laterally parallel centrifugal lines prevailing, upper integument layer finely striated; muscle attachments: smooth coxal field: posterior margin of Cx-1 strongly curved or truncated, apodemes of Cx-2 forming an acute angle

I-L: I-L-5 with S-1/2 little distanced, with rounded tips, I-L-6 with a regular row of ventral hairs, claws strong genital field: Ac in triangular arrangement excretory pore: smooth; Vgl-1: sexual dimorphism? (fused to Vgl- 2 in males, but separate in females)

palp: weak sexual dimorphism; anteroventral hair of P-4 shifted to the lateral side, sword seta distally from distal hair, very fine, nearly hair-like, P-5 with cheeks

Male

SMF 5875:

genital field: indentation at anterior margin very weak, at posterior margin deep; genital setae: 46

palp: P-4 slightly thickened and with dense cover of dorsal hairs idiosoma L/W 740/600; glandularia 45

coxal field L 430; Cx-3 W 450; Cx-1 + 2 mL 160, IL 280, W 330

I-L-5 dL 208, vL 163, dL/vL 1.28, HA-HC 32, 42, 56, dL/HB 4.95

S-1 L 75, L/ W 15.0, S-2 L 72, L/ W 10.3, interspace 15, L S-1/2 1.04

I-L-6 L 144, HA-HC 32, 28, 35, dL/HB 5.14; L I-L-5/6 1.44

genital field L/W 140/180, Ac-1–3 L 40, 42, 45

gnathosoma vL 230; chelicera L 330, L/H 8.25, bS/claw 2.0

Figures

Figure 85. Atractides pavesii; A–D, ♂, Germany, SMF 5875. A, coxal field; B, genital and postgenital area; C, I-L-5 and -6; D, gnathosoma with palps in situ; E–I ♀, Italy, SMF 7199. E, chelicera; F, IV-L-5 and -6; G, genital field; H, palp, lateral view, I I-L-5 and -6, partial view. Scale bars = 100 µm.