Euwallacea sibsagaricus

Taxonomic history

Xyleborus sibsagaricus Eggers, 1930: 196.

Euwallacea sibsagaricus (Eggers): Wood, 1989: 173.

Synonyms

Xyleborus dalbergiae Eggers, 1930: 196. Wood, 1989: 173.

Xyleborus tonkinensis Schedl, 1934a: 39. Smith et al. 2020b: 254.

Diagnosis

3.4−3.9 mm long (mean = 3.58 mm; n = 5); 2.77−2.83 times as long as wide. This species is distinguished by its slender form; posterolateralposterolateral:
relating to end of the side part/portion
margin of declivitydeclivity:
downward slope of either the pronotum or elytra
costate and granulategranulate:
pertaining to a coarse, grainy surface texture
, pronotumpronotum:
the dorsal surface of the thorax
appearing subquadratesubquadrate:
almost quadrate, with oblique corners
when viewed dorsally (type 3); protibiaeprotibia:
tibia of the first pair of legs
outer margin distinctly triangular bearing five short, broad obtuse denticles; strial punctures approximately the same size on discdisc:
the flat central upper surface of any body part (e.g. pronotum and elytra)
and declivitydeclivity:
downward slope of either the pronotum or elytra
; declivitydeclivity:
downward slope of either the pronotum or elytra
very steep; and declivitaldeclivital:
pertaining to the elytral declivity
surface strongly shiningshining:
appearing glossy or bright in luster; referring to a surface that is polished and reflects light well
.

May be confused with

Euwallacea luctuosus, E. subalpinus, Heteroborips tristis

Distribution

Bhutan, China (Yunnan), India (Arunachal Pradesh, Assam, Meghalaya, West Bengal), Indonesia (Maluku), East Malaysia, Philippines, Vietnam

Host plants

recorded from Casearia (Flacourtiaceae), Ehretia (Ehretiaceae) and Sapium (Euphorbiaceae) (Beeson 1961Beeson 1961:
Beeson CFC. 1961. The ecology and control of the forest insects of India and the neighbouring countries. 2nd edition. Government of India, New Delhi, 767 pp.), and Hevea brasiliensis (Euphorbiaceae)

DNA data

Sequences available for COI and CAD.

COI: MN619945

CAD: MN620226