Kongsbergia (s. str.) materna Thor, 1899

Gerecke, Reinhard, 2014, Studies on European species of the water mite family Aturidae Thor (Acari: Hydrachnidia), Zootaxa 3841 (1), pp. 1-46 : 25-26

Kongsbergia (s. str.) materna Thor, 1899

Fig. 18

Material examined. Type material lost.

Germany: D 312a (0/4/0), D 385 (1/2/0), D 448 (0/1/0), D BGL Ob Ausfl 20.06.2010 (0/1/0); France: Corsica, F 39 Int (1/0/0); Italy: Calabria, I 101 (1/0/0); Sicily, I 502 (1/0/0).

Uncertain records. Italy, Sardinia: I 340 (0/1/0), I 369 (0/2/0); Sicily: I 1 (0/1/0), I 193 (0/1/0), I 534 Int (0/1/ 0), I 548 Int (0/1/0), I 551 Int (0/1/0), I 553 Int (0/1/0); Spain: Aragon, E 131a (0/2/0).

Remarks. Males of K. materna are characterized by a very robust palp, with P-2 dorsal margin in proximal part strongly protruding, and a prominent, anteriorly-directed ventral projection, P-4 about as long as P-2 (length ratio P-2/P-4, 0.9–1.2), without a ventral projection. Furthermore, the medioventral seta on IV-L-5 is long, strong and pointed, the distoventral seta hook-shaped. Females collected together with male K. materna differ noteworthy in palp shape, with P-4 rather slender (L/H ratio> 4.5) and distinctly longer than P-2+3. In addition to these characteristics, they differ from other Kongsbergia species in the straight ventral margin of P-4 and the position of the ventral extensions on P- 2 in central part of segment.

Measurements of two males (I 103, I 503) and two females (D 385, D 448): Males: Idiosoma L/W 340–360/ 240 (ratio 1.4–1.5), dL 240; IV-L (L/H, L/H ratio): IV-L-4, 70/31–32, 2.1–2.1; IV-L-5, 78–85/36–40, 2.1; IV-L-6, 102–105/40–43, 2.4–2.56; L ratio IV-L-4/5, 0.8–0.9; IV-L-4/6, 0.7; IV-L-5/6, 0.7–0.8. Palp measurements (L/H, L/ H ratio, relative L % total L): P-1, 20–23/28–33, 0.7, 8; P-2, 85–108/68–90, 1.1–1.3, 32–36; P-3, 35–38/43–60, 0.6–0.8, 13; P-4, 93–98/29–38, 2.6–3.2, 33–35; P-5, 33/15–16, 2.0–2.2, 11–12. L ratio P-2/P-3, 2.4–2.9; P-2/P-4, 0.9–1.1; P-3/P-4, 0.4; P4/P-2+3, 0.7–0.8. Females: Idiosoma L/W 370–390/275 (ratio 1.3–1.4), dL 350–365; Palp measurements (L/H, L/H ratio, relative L % total L): P-1, 23–25/25–28, 0.9, 8–9; P-2, 68/55–60, 1.1–1.2, 24; P-3, 38–39/34–38, 1.0–1.1, 13–14; P-4, 119–120/25, 4.7–4.8, 42–43; P-5, 33–35/14–16, 2.1–2.4, 12. L ratio P-2/P-3, 1.7–1.8; P-2/P-4, 0.55–0.6; P-3/P-4, 0.3; P4/P-2+3, 1.1.

Figures

FIGURE 18. Kongsbergia materna. A. female palp. B. – D, male. B. IV-L- 4 – 6; C. palp; D. venter. Scale bar = 100 µm.