Kongsbergia (s. str.) largaiollii (Maglio, 1909)

Gerecke, Reinhard, 2014, Studies on European species of the water mite family Aturidae Thor (Acari: Hydrachnidia), Zootaxa 3841 (1), pp. 1-46 : 23-24

Kongsbergia (s. str.) largaiollii (Maglio, 1909)

Fig. 17

Material examined. Type material lost.

Austria: Donau E Wien, coll. Humpesch, G4/9 (0/1/0), G2/10 (0/0/1); Germany: D 453/2 (0/1/0), D 453/3 (1/1/ 0), D 453/4 (1/0/0), D 453/7 (0/1/0), D 453/9 (0/2/0), D 453/10 (0/1/0); Italy, Sicily: I 472 Int (1/0/0), I 552 (1/0/0), I 553 Int (4/0/0), I 1138 Int (0/1/0).

Uncertain records. Spain: Albacete, E 167 (0/1/0); Italy, Calabria: I sa 11 (0/1/0); Sicily: I 510 Int (0/1/0), I 511 Int (0/1/0), I 548 Int (0/1/0).

Remarks. Males of K. largaiollii differ from all other European species in the presence of a distinct medial suture line between Cx-III/IV. They are furthermore characteristic in a palp with relatively long P-4 (L ratio P-2/P- 4, 0.8–0.9) and a IV-L-5 with medioventral seta distinctly longer than proximo- and distoventral seta. Females collected together with male K. largaiollii have a rather broad idiosoma (length/width ratio 1.3–1.5), a pair of stronger setae on dorsal shield, and a palp with P-3 relatively slender and elongated (L/W ratio 1.1, length ratio P- 2/P-3, 1.9–2.3) and P-4 relatively stout (L/H <4.5), similar in length as P-2+3 and with straight ventral margin in central part.

Measurements of three males (I 553 Int) and two females (D 453, I 553 Int): Males: Idiosoma L/W 325–340/ 210–230 (ratio 1.5), dL 295–320; IV-L (L/H, L/H ratio): IV-L-4, 73–78/38–39, 1.9–2.0; IV-L-5, 78–80/40–41, 1.9–2.0; IV-L-6, 98–100/39–40, 2.4–2.5; L ratio IV-L-4/5, 0.9; IV-L-4/6, 0.7–0.8; IV-L-5/6, 0.8. Palp measurements (L/H, L/H ratio, relative L % total L): P-1, 18–20/30, 0.6–0.7, 7–8; P-2, 73–78/70–73, 1.1–1.1, 28–30; P-3, 35–43/45, 0.8–0.9, 14–16; P-4, 90–91/30–31, 2.9–3.0, 35; P-5, 36–38/14–15, 2.4–2.7, 14–15. L ratio P-2/P-3, 1.7–2.2; P-2/P-4, 0.8–0.9; P-3/P-4, 0.4–0.5; P4/P-2+3, 0.8–0.9. Females: Idiosoma L/W 360–365/ 240–265 (ratio 1.4–1.5), dL 310–330; Palp measurements (L/H, L/H ratio, relative L % total L): P-1, 23–25/25–28, 0.9, 9; P-2, 61–63/50–54, 1.2, 23–24; P-3, 38–40/34–35, 1.1, 14–15; P-4, 99–103/24–25, 4.0–4.3, 37–40; P-5, 35–40/15–18, 2.3, 14–15. L ratio P-2/P-3, 1.6; P-2/P-4, 0.6; P-3/P-4, 0.4; P4/P-2+3, 1.0.

Figures

FIGURE 17. Kongsbergia largaiollii. A. – B, female. A. palp; B. dorsum. C. – E. male. C. venter; D. palp; E. IV-L- 4 – 6. Bars = 100 µm.