Arrenurus nodosus Koenike, 1896

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 : 55

Arrenurus nodosus Koenike, 1896

( Fig. 37 )

Arrenurus simplex Koenike, 1904

Material examined: 6 larvae deriving from 1 female.

Larvae medium-sized: idiosoma 190–210 µm long.

Dorsum: Dp intermediate in size (DpL: 186–200 µm; DpW: 148–168 µm), oval, widest at mid-length. Anterior margin almost straight; posterior margin terminated fairly bluntly. Antero-lateral indents small, somewhat obtuse-angled, about 1/7 and 1/4 of dorsal plate length and width, respectively. DpW/Mp1-Mp1 3.5. Lp2, Mh1 smooth. Mp1-Mp1 intermediate (44–48 µm), equal to Mp2-Mp2 (45–50 µm); Mp1-Lp2 small (30–36 µm). Venter: CpIIm (31–35 µm) and CpIIIm (29–34 µm) equal length; CpIm twice as long (63–67 µm). C2, C3 bipectinate; C1, C4 pectinate, located relatively close to inner margins of Cp; C1-CpIm (14–18 µm) about 2/3 of C4-CpIIIm (22–26 µm). C1-C2 long (50–56 µm). Expp rhomboid, somewhat wider than long. Exp located below plate’s mid-point and below E2. E1 situated relatively close to anterior margin of Expp. Palps: PIII 1 bipectinate; PV6 short, thick. Chelicerae: First segment (78–84 µm) distinctly bent, margins strongly converging anteriorly. Legs: Shorter than body; LI= LII < LIII ( Fig. 6). ITi8 thin, short. IITi10 very long, smooth, located at 1/3 of distance to distal end of tibia; IIITi10 thick, short, pectinate, located near distal end of tibia. IIITa11, IIITa12 smooth; IIITa13 pectinate. Hosts: Culicidae (Münchberg 1936, 1937).

Figures

FIGURE 37. Arrenurus nodosus: A—ventral side, B – dorsal plate, C – excretory pore plate, D – pedipalp, E – leg I (scale bars: A, B—100 µm; C, D, E—20 µm).