Mamersella thienemanni K. Viets, 1929

Pešić, Vladimir, Smit, Harry & Mary, Nathalie, 2015, Third contribution to the knowledge of water mites from the Comoros, with the description of two new species (Acari: Hydrachnidia), Zootaxa 3964 (4), pp. 445-459 : 446

Mamersella thienemanni K. Viets, 1929

( Fig. 1A–D )

Material examined. Comoros , Mayotte: River Batirini, 12°45'37,7"S, 45°06'42,0"E, 22-iv-2009, 2/0/0 (1/0/0 mounted).

Remarks. Mamersella thienemanni seems to be a very widespread and variable species ( Goldschmidt 2008). The male specimens of this study agree well with the description of M. thienemanni from Madagascar ( Goldschmidt 2008). Specimens in our study are notably smaller, but do not differ in proportions and general idiosoma and palp morphology ( Fig. 1A–D ).

Measurements: Dorsal plate L/W 492/309; ventral shield L/W 597/447; coxal field: L 369, Cx-III W 256, Cx-I mL 91, Cx-III mL 65; genital field L/W 112/81; ejaculatory complex L 128; gnathosoma vL 131; chelicera total L 222; dL/H, dL/H ratio: P-1, 22/35, 0.62; P-2, 95/55, 1.73; P-3, 45/38, 1.17; P-4, 106/29, 3.7; P-5, 23/15, 1.52; P-2/ P-4 L ratio 0.9. dL of IV-L-1–6: 112, 73, 86, 104, 125, 123.

Distribution. Indonesia, India, Madagascar. New for Comoros .

Figures

FIGURE 1 A – D. Photographs of Mamersella thienemanni K. Viets, 1929, male, River Batirini: A = idiosoma, ventral view; B = dorsal shield; C = palp, medial view; D = IV-L- 6.