Truncaudum agnatum

Taxonomic history

Xyleborus agnatus Eggers, 1923: 197.

Truncaudum agnatum (Eggers): Hulcr and Cognato, 2010a: 25.

Synonyms

Xyleborus gratiosus Schedl 1942a: 199. Hulcr and Cognato, 2010a: 25.

Xyleborus nutans Schedl, 1942a: 199. Bright and Skidmore, 1997: 4, 151.

Xyleborus polyodon Eggers, 1923: 196. Hulcr, 2010: 114.

Xyleborus delicatus Schedl, 1955a: 300. Hulcr and Cognato, 2010a: 25.

Xyleborus subagnatum Wood, 1992: 85. Hulcr and Cognato, 2010a: 25.

Diagnosis

2.1−2.9 mm long (mean = 2.4 mm; n = 5); 2.44−2.9 times as long as wide and densely pubescent. This species is distinguished by the declivitydeclivity:
downward slope of either the pronotum or elytra
obliquely truncatetruncate:
appearing cut off or suddenly shortened
, margins rounded; declivitaldeclivital:
pertaining to the elytral declivity
interstriae 1 flat; and large size.

This species is strikingly similar to many small Cyclorhipidion species and can be distinguished by the type 2 antennalantennal:
pertaining to the antennae
club (Cyclorhipidion has types 3, 4, 5).

May be confused with

small Cyclorhipidion species

Distribution

Australia, Borneo, Federated States of Micronesia, Indonesia (Java, Maluku, Sulawesi, Sumatra), New Caledonia, New Guinea, Palau, Philippines, Solomon Islands, Thailand

Host plants

polyphagous (Browne 1961bBrowne 1961b:
Browne FG. 1961b. The biology of Malayan Scolytidae and Platypodidae. Malayan Forest Records 22: 1-255., Ohno 1990Ohno 1990:
Ohno S. 1990. The Scolytidae and Platypodidae (Coleoptera) from Borneo found in logs at Nagoya port 1. Research Bulletin of the Plant Protection Service, Japan 26: 83-94.)

DNA data

Sequences available for COI and CAD.

COI: MN620006; HM064102; HM064103; HM064123; HM064079; HM064046

CAD: MN620276; HM064283; HM064284; HM064302; HM064258; HM064225