Stigmaeopsis Banks, 1917

Saito, Y., Sato, Y., Chittenden, A. R., Lin, J. - Z. & Zhang, Y. - X., 2018, Description of two new species of Stigmaeopsis, Banks 1917 (Acari, Tetranychidae) inhabiting Miscanthus grasses (Poaceae), Acarologia 1917 (2), pp. 414-429 : 415

Genus Stigmaeopsis Banks

Diagnosis — Palp tarsus with six phaneres (projections): conical spinneret, two eupathidia, one solenidion and two tactile setae (n.b. seta b absent). Propodosoma well demarcated from hysterosoma; opisthonotum with 12 pairs of setae (c 1-3, d 1-2, e 1-2, f 1-2, h 1-3; n.b. setae h 1 are present, h 3 placed ventrally); setae c 1 widely spaced, in sublateral position close to setae c 2 and c 3; dorsal body setae slender with fine splits, length variable; opisthonotum with distinctive region of dorsocentral longitudinal striae between setae c 1- c 1 and d 1- d 1; two pairs of genital setae (g 1-2); two pairs of pseudanal setae (ps 1-2); tarsus I with two pairs of distal, adjacent duplex setae; tarsus II with one pair of duplex setae; empodium split into two claws, male tarsus I with empodium same as female empodium; male aedeagus weakly sigmoid, bending dorsally, without head. Leg setation typically reduced (e.g., genua 5-4-3-2).

Remarks — Stigmaeopsis is similar to some species of Schizotetranychus but is distinguished by its distinctive region of mid-dorsal longitudinal striae (though S. meghalayensis shows transverse striae), the loss of the palpal tactile seta b, and conical shape of spinneret.