Taxonomy

Coptodryas Hopkins, 1915a: 54.

Diagnosis

1.80−4.00 mm long, 1.88−2.71 times as long as wide. Coptodryas can be distinguished by the scutellum not visible; dense tuft of setae present along elytral base associated with an elytral mycangium (C. confusa also has a pair of pit mycangia on the pronotal disc); elytral bases sinuate, costate; antennal club flattened, types 3 or 4, sutures gently sinuate and pubescent on anterior face, three sutures visible on posterior face; pronotum from lateral view basic (type 0), or long and conical (type 5), rarely taller than basic (type 2; C. confusa); pronotum from dorsal view rounded (type 1) or basic and parallel sided (type 2), rarely conical (type 0; C. confusa); and anterior margin of pronotum with or without a row of 2−6 serrations. In addition the procoxae contiguous, protibia outer margin obliquely or distinctly triangular, armed by 6 or 7 denticles, posterior face flattened, unarmed.

May be confused with

Microperus and Schedlia

Distribution

Species are distributed in tropical Asia and are rare in Melanesia.

Gallery system

The gallery system in this genus appears to be rather variable (Browne 1961b). In C. bella (Sampson) and C. punctipenna (Schedl), an unbranched entrance tunnel leads to a single terminal brood chamber in the longitudinal plane. In C. confusa (Hopkins), the tunnels are simply branched and expanded in places to form small, irregular brood chambers in the longitudinal plane. In C. quadricostata (Schedl) and C. curvidente (Schedl), which usually breed in small diameter stems, there is a bifurcate or circumferential gallery in the transverse plane, and one or two longitudinal branches of very variable width in which the larvae develop (Browne 1961b).

Remarks

Coptodryas is paraphyletic with several species of Microperus. Further study is necessary to delimit both genera.