Taxonomic history

Euwallacea geminus Smith, Beaver & Cognato 2020 (in Smith et al. 2020b): 239.

Diagnosis

2.7−2.8 mm long (mean = 2.72 mm; n = 5); 2.33−2.35 times as long as wide. This species is distinguished by the pronotum basic (type 2) when viewed dorsally, anterior margin appearing rounded; elytral bases weakly costate, granulate; elytral declivity rounded; declivital face convex; protibia outer margin rounded with at least seven socketed denticles, denticles small, their sockets small; declivital surface shining; interstriae bearing sparse small granules, posterolateral declivital margin carinate and granulate; and elytral bases weakly carinate and granulate.

This species is identical to Euwallacea malloti and can only reliably be identified with molecular data. Without molecular data, it can be distinguished by its distribution in lowland forests (E. malloti primarily occurs in submontane forests of the Himalayas) and by the often unique coloration of the elytral striae which are dark brown in mature specimens making the punctures appear very distinctive and obvious (E. malloti strial punctures not colored differently than the rest of the elytra). This species is also nearly identical to the E. fornicatus species complex and can be separated by the elytral bases weakly carinate and posterolateral declivital costa granulate.

May be confused with

Euwallacea fornicatus species complex (E. fornicatior, E. fornicatus, E. kuroshio, E. perbrevis), E. andamanensis, E. malloti, E. semirudis, E. neptis, E. testudinatus, and E. velatus

Distribution

Vietnam

Host plants

unknown (Smith et al. 2020b)

DNA data

Sequences are available for COI and CAD.

COI: MN619954

CAD: MN620227