Cryptoxyleborus subnaevus Schedl, 1937:552

Beaver, Roger A. & Hulcr, Jiri, 2008, A Review of the Ambrosia Beetle Genus Cryptoxyleborus Schedl (Coleoptera: Curculionidae: Scolytinae), The Coleopterists Bulletin 62 (1), pp. 133-153 : 133-153

Cryptoxyleborus subnaevus Schedl, 1937:552

Taxonomy: The female was described from specimens collected in Indonesia (Kalimantan) and W. Malaysia. Schedl (1966) described the male. Females are rather variable in size, the shape of the elytral apex, and in the degree of development of the vestiture. This is not surprising, for it has the widest recorded distribution of any species of Cryptoxyleborus .

Distribution: East Malaysia ( Sarawak), India (Kerala), Indonesia (Kalimantan, Sumatera), Myanmar, Philippines, Thailand, West Malaysia. The records from the Philippines all come from timber imported from the island of Luzon to Japan ( Schedl 1966; Ohno et al. 1987). The species is newly recorded here from Australia, Brunei Darussalam, and East Malaysia (Sabah). It has probably been introduced to Australia, and it is not certain whether it is established there.

New Records: AUSTRALIA, n. Qld, Iron Range , 26–31.x.1991 (Wood, Dunn & Hasenpusch) (2) ( QDPI, RAB) ; BRUNEI: Labi, Bukit Teraja , 60 m, mxt.dipt.forest, light traps 25, 50, 75 m above ground, 21.viii., 24.viii.1979 (S.L.Sutton) (17) ( BMNH, RAB) ; MALAYSIA, Sabah, Sipitang, Mendolong , 150 various dates from 1.xii.1987 – 2.iii.1989 (S.Adebratt) (13) ( ZMLU, RAB) ; [Sabah] Borneo (Brit. N.), Sandakan Bay ( NE) , Sepilok For. Res., 1–10 m, light trap, 30.x.1957 (J.L.Gressitt); British N.Borneo, Tawau, Quoin Hill, light trap, 3– 7.vii.1962 (H.Holtmann); as previous except: Cocoa Res. Stn, 5.ix.1962 (Y.Hirashima); North Borneo ( SE) , forest camp, 19 km N. of Kalabakan , 60 m, 28.ix.1962 (K.L.Kuncheria) (5) ( BPBM) .

Biology: Recorded from species of Dipterocarpus , Dryobalanops , Pentacme and Shorea (Dipterocarpaceae) . If established in Australia, it would be of great interest to discover the host trees in which it is breeding. Species of Cryptoxyleborus normally only attack dipterocarp trees, and there are no native dipterocarp species in Australia.