Taxonomic history

Xyleborus malloti Eggers, 1930: 192.

Euwallacea malloti (Eggers): Wood and Bright, 1992: 692.

Diagnosis

2.4−3.0 mm long (mean = 2.62 mm; n = 5); 2.08−2.7 times as long as wide. This species is distinguished by the pronotum basic (type 2) when viewed dorsally, anterior margin appearing rounded; 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 n. sp. 5 and can only reliably be identified with molecular data. Without molecular data it can be distinguished by its distribution primarily in submontane forests of the Himalayas (E. n. sp. 5 occurs in lowland forests) and by the elytral strial punctures not colored differently than the rest of the elytra (E. n. sp. 5 typically has unique coloration of the elytral striae, which are dark brown in mature specimens, making the punctures appear very distinctive and obvious. This species is nearly identical to 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. geminus, E. neptis, E. semirudis, E. testudinatus, and E. velatus

Distribution

India (Meghalaya, Tamil Nadu, Uttarakhand, West Bengal), Laos

Host plants

recorded from Eugenia (Myrtaceae), Mallotus (Euphorbiaceae), Phoebe (Lauraceae), Tinospora (Menispermaceae) (Maiti and Saha 2004) and Melia (Meliaceae) (Smith et al. 2020b)

DNA data

Sequences available for COI and CAD.

COI: MN619938

CAD: MN620213