Eylais degenerata Koenike, 1897

Gerecke, Reinhard, 2020, The early derivative water mites (Acari: Hydrachnidia, superfamilies Eylaoidea, Hydrachnoidea and Hydryphantoidea) of Madagascar, Zootaxa 4727 (1), pp. 1-77 : 8

Eylais degenerata Koenike, 1897

Fig. 2 a – b

New records: MD 237, West, S de Malambolo, 1949, Paulian leg. (1/0/0), Ac 1232; MD 239, West, Lac de la Mahajamba, X 1949, Paulian leg. (4/2/0), Ac 1218 – 1221; MD 240, West, Mianduvajo, VII 1949, Paulian leg. (0/4/0), Ac 1222 – 1225; MD 241, Antsohihy, eau stagnante, X 1949, Paulian leg. (2/0/0), Ac 1226 – 1227. All slide-mounted, MNHN.

As to the width of their eye plate, the specimens display a rather wide variability, but a convex posterior extension of the median bridge is always found. The collection data suggest that males appear in the last quarter of the year.

Figures

FIGURE 2. Family Eylaidae, genus Eylais (e.–f. from Koenike 1898, without sex and magnification information, modified). a.–b. E. degenerata male (MD 239); a. eye plate; b. palp, P-3–5; c.–d. E. voeltzkowi male (MD 235); c. frontal plate and integument with acetabula on the right side; d. gnathosoma with palp and chelicera; e. E. crenocula, eye plate; f. E. megalostoma, eye plate.