Tricosa metacuneolus

Taxonomic history

Xyleborus metacuneolus Eggers, 1940: 150.

Tricosa metacuneola [sic] (Eggers): Cognato et al. 2020a: 550.

Synonyms

Xyleborus kaimochii Nobuchi, 1981a: 143. Smith et al., 2018b: 397.

Diagnosis

2.4−2.5 mm long (mean = 2.46 mm; n = 5); 2.67−2.78 times as long as wide. This species is distinguished by elytralelytral:
pertaining to the elytra
discaldiscal:
pertaining to the disc of either the pronotum or elytra
striae and interstriaeinterstria:
longitudinal spaces along the elytra between the striae, which is not as<br /> impressed and bear smaller punctures.
clearly uniseriate punctatepunctate:
set with fine impressed points, appearing as pin pricks
; anterior margin of pronotumpronotum:
the dorsal surface of the thorax
with a row of serrations; and protibiaprotibia:
tibia of the first pair of legs
obliquely triangular.

May be confused with

Coptodryas mus and Fraudatrix cuneiformis

Distribution

Brunei, India (West Bengal), Indonesia (Java, Sulawesi), Japan, East and West Malaysia, New Guinea, Philippines, Sri Lanka, Taiwan, Thailand

Host plants

probably polyphagous; recorded from Buchanania, Mangifera (Anacardiaceae), Swietenia (Meliaceae), Castanopsis (Fagaceae) and Albizia (Fabaceae) (Nobuchi 1981aNobuchi 1981a:
Nobuchi A. 1981a. Studies on Scolytidae (Coleoptera) XXII. Six new species and two new females of the genus Xyleborus from Japan. Kontyucirc; 49: 143-154., Beaver and Liu 2010Beaver and Liu 2010:
Beaver RA, Liu L-Y. 2010. An annotated synopsis of Taiwanese bark and ambrosia beetles, with new synonymy, new combinations and new records (Coleoptera: Curculionidae: Scolytinae). Zootaxa 2602: 1-47. https://doi.org/10.11646/zootaxa.2602.1.1, Smith et al. in review)

DNA data

Sequences available for COI and CAD.

COI: MN199589

CAD: MN199606