Gamasellevans Loots & Ryke

Castilho, Raphael C., Silva, Edmilson S., De, Gilberto J. & Halliday, Bruce, 2016, Catalogue of the family Ologamasidae Ryke (Acari: Mesostigmata), Zootaxa 4197 (1), pp. 1-147 : 12

Gamasellevans Loots & Ryke (7 described species)

Movable and fixed cheliceral digits with three and five teeth, respectively. Epistome with an anteromedian extension wider at base. Seta h 3 about in longitudinal line with h 1 and in transverse line or slightly anterior and mediad to h 2. Idiosoma elongate, 250–480 µm long and 120–230 µm wide at widest level. Podonotal and opisthonotal shields fused by a distinct, complete and straight line of fusion. Dorsal idiosomal setae aciculate. Podonotal region of dorsum with 22 pairs of setae, of which 22 pairs on podonotal shield and without setae on soft integument along lateral margins of podonotal shield. Opisthonotal region with 21 pairs of setae, of which 21 pairs on opisthonotal shield and without setae on soft integument along lateral margins of opisthonotal shield. Seta j 1 not on prominent protuberance, longer, as long as or shorter than r 3 and Z 5. Opisthonotal and ventrianal shields separated. With 1 pair of presternal platelets. Sternal shield fused to endopodal shield near coxa IV; setae st 1 slightly mediad to imaginary line between st 2– st 4. Opisthogaster without platelets between genital and ventrianal shields; with 5–6 pairs of setae on ventrianal shield and 1–2 pairs on soft integument around ventrianal shield; postanal seta as long as or shorter than para-anal seta. Peritreme with straight or smoothly curved margins, extending anteriorly to level of middle of coxa II. Peritrematal shield not fused posteriorly to exopodal shield near coxa IV. Exopodal shields near coxae II–III–III fused or divided at median level of coxa III. Exopodal shield near coxa IV fused to ventrianal shield. Without distinct metapodal platelets. All legs with pretarsi. Genua I, III and IV and tibia IV with 13, 9, 10 and 10 setae, respectively.