Atractides chelidon, Gerecke, 2003

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 : 325

ATRACTIDES CHELIDON SP. NOV. ( FIG. 83A–G )

Type series: Holotype ♂, MNHL, Atractides chelidon nov. spec. Holotypus ♂ Gerecke ; Lux int4c Ösling , Hoscheid , Schlënnerbaach u. Chapelle St. Michel, Interstitial 3, 300 m, 72.5/113.2, 7.8.1998 Gerecke & Schrankel. State of conservation: gnathosoma separate, laterally, with palps and chelicerae in situ, left I-L detached, laterally (mounted on slide together with five deutonymphs of A. denticulatus ) .

Description:

General features

Female unknown dorsal integument: nearly smooth, only locally, in tangential view an extremely fine striation visible (12/10 Mm); muscle attachments: smooth coxal field: sclerotization only weak, with a dense porosity, mediocaudal margin of Cx-1 + 2 swallow-tail shaped, with apodemes of Cx- 2 in an acute angle, and between the apodemes indented, Cx-3+4 slender, suture line Cx-3/4 nearly straight, not anteriorly projecting near the glandular pore on Cx-4 I-L: little modified; I-L-5 with little diverging, straight dorsal and ventral margins, setae S-1/2 homoiomorphic, short and pointed, side by side, flagellar seta short and weakly modified; I-L-6 nearly straight, dorsal and ventral margins equally diverging from the base to the claw furrow, but with the typical ventral setae groups, claw strong excretory pore: smooth; Vgl-1: separate from Vgl-2

Males

Holotype:

genital field: anterior margin equally convex, posterior margin with a deep indentation, Ac relatively large; genital setae: 40

palp: ventral margin of P-2 slightly convex in the distal half, but without extensions, P-3 straight, P-4 4: 4: 1, slightly protruding near insertion of proximoventral hair, distoventral hair shifted to the lateral surface of the segment, sword seta compact, inserted far distally, between the levels of the ventral hair insertions, with a cover of very fine dorsal hairs idiosoma L/W 750/550; glandularia 25 Mm

coxal field L 330; Cx-3 W 400; Cx-1 + 2 mL 90, IL 205, W 270

I-L-5 dL 135, vL 110, dL/vL 1.23, HA-HC 30, 33, 35, dL/HB 4.09

S-1 L 42, L/ W 8.4, S-2 L 40, L/ W 8.0, interspace 0, L S-1/2 1.05

I-L-6 L 1132, HA-HC 23, 27, 35, dL/HB 4.89; L I-L-5/6 1.02

genital field L/W 100/124, Ac-1–3 L 35, 33, 40

gnathosoma –; chelicera L 227, L/H 6.49, basal segment/claw 3.37

Figures

Figure 83. Atractides chelidon, holotype ♂. A, coxal field; B, genital and postgenital field; C, palp, medial view; D, palp, lateral view; E, chelicera; F, I-L-5 and -6 anteriorly; G, I-L-5 and -6 posteriorly. Scale bars = 100 µm.