Acugamasus Lee

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 : 8

Acugamasus Lee (20 described species)

Movable and fixed cheliceral digits with 1–4 and 3–9 teeth, respectively. Epistome with an anteromedian extension wider at base, usually flanked by one or more pairs of large anterolateral spines, shorter than anteromedian extension. Seta h 3 about in longitudinal line with h 1 and slightly anterior or slightly posterior and mediad to h 2. Idiosoma elongate or suboval, 320–850 µm long and 180–540 µm wide at widest level. Podonotal and opisthonotal shields separated. Dorsal idiosomal setae aciculate, pilose or expanded distally, but not densely pilose. Podonotal region of dorsum with 21–23 pairs of setae, of which 19–23 pairs on podonotal shield and 0–3 pairs on soft integument along lateral margins of podonotal shield. Opisthonotal region with 16–27 pairs of setae, of which 11–20 pairs on opisthonotal shield and 0–13 pairs on soft integument along lateral margins of opisthonotal shield. Seta j 1 not on prominent protuberance, shorter than r 3 and as long as Z5 or shorter. Opisthonotal and ventrianal shields separated. One pair of presternal platelets present. Sternal shield fused or not to endopodal shield near coxa IV; setae st 1– st 4 in longitudinal line or st 4 laterad to imaginary line between st 1– st 3. Opisthogaster with 0–6 platelets between genital and ventrianal shields; with 5–9 pairs of setae on ventrianal shield and 0–2 pairs on soft integument around ventrianal shield; post-anal seta as long as or longer than para-anal seta. Peritreme with straight or smoothly curved margins, extending anteriorly beyond coxa II. Peritrematal shield fused posteriorly to exopodal shield near coxa IV, with connection behind stigma wider than peritreme. Exopodal shields near coxae II–III–III usually fused. Usually with a pair of rounded or elongate metapodal platelets. All legs with pretarsi. Genua I, III and IV and tibia IV with 13, 9, 10 and 10 setae, respectively.