Xyleborus luctuosus Eggers, 1939a: 13.
Euwallacea luctuosus (Eggers): Wood and Bright, 1992: 691.
3.6 mm long (n = 1); 3.6 times as long as wide. This species is the most slender Euwallacea species. It can be further recognized by the posterolateral margins of declivity weakly costate; pronotum from dorsal view elongate, anterior margin rounded (type 7); outer margin of protibia obliquely triangular and bearing seven large denticles, their bases contiguous.
Euwallacea sibsagaricus, E. subalpinus, and Heteroborips tristis
unknown (Smith et al. 2020b)
specimens not available for sequencing