Arrenurus bifidicodulus Piersig, 1897

Zawal, Andrzej, 2008, Morphological characteristics of water mite larvae of the genus Arrenurus Dugès, 1834, with notes on the phylogeny of the genus and an identification key, Zootaxa 1765 (1), pp. 1-75 : 58-59

Arrenurus bifidicodulus Piersig, 1897

( Fig. 41 )

Arrenurus integrator papillaeformis Piersig, 1898 Material examined: 10 larvae deriving from 10 females.

Larvae medium-sized: idiosoma 194–208 µm long.

Dorsal: Dp medium-sized (DpL: 180–200 µm; DpW: 136–158 µm), egg-shaped, widest at mid-length, posterior margin rounded. Antero-lateral indents large, obtuse-angled, about 1/4 and 1/3 of distal plate’s length and width, respectively. DpW/Mp1-Mp1 4.5. Lp2, Mh1 smooth. Mp1-Mp1 short (31–37 µm), shorter than Mp2-Mp2 (41–46 µm); Mp1-Lp2 short (36–40 µm). Venter: Median margins of CpI, CpII, CpIII 67–72, 31–34, 35– 40 µm, their ratio 2.4:1:1.3. C2, C3 bipectinate, relatively thick, C1, C4 pectinate. C1-CpIm (17– 22 µm) about 2/3 of C4-CpIIIm (29–34 µm). C1-C2 intermediate (42–46 µm). Expp pentagonal, anterior margin slightly concave, somewhat wider than long. Exp located below plate’s mid-point and below E2. Palps: PIII 1 bipectinate; PV3 pectinate. Chelicerae: First segment elongated (70–83 µm), margins slightly curved, parallel. Legs: As long as body; LI= LII = LIII ( Fig. 6). ITi8 thin and short; IITi10, IIITi10 smooth, located near mid-point of tibia. Hosts: Culicidae (Münchberg 1937) .

Figures

FIGURE 41. Arrenurus bifidicodulus: A – ventral side, B—dorsal plate, C—excretory pore plate, D—pedipalp (scale bars: A, B—100 µm; C, D—20 µm).