Three new genera of oriental Xyleborina (Coleoptera: Curculionidae: Scolytinae) Author Hulcr, Jiri Author Cognato, Anthony I. text Zootaxa 2009 2204 19 36 journal article 10.5281/zenodo.189700 f48b8ba7-9ec3-455c-8087-9082458a6f72 1175-5326 189700 AA07F2AD-8D1C-408E-9F44-A7696CF3B1AE Ambrosiophilus sexdentatus ( Eggers, 1940 ) comb. n. Previous genus: Streptocranus Compared to holotype in USNM Diagnosis: Antenna type 4–5. Posteriorly prolonged pronotum. Prolonged elytra, declivity impressed along suture, surrounded by an elevated sulcus from elevated interstriae 2 and 3. The sulcus reaches almost to the bases of elytra, and is armed with conspicuous teeth. The species is variable in size. Length: 2.8–3.2 mm . Discussion. The species was described as Xyleborus by Eggers (1940) , then transferred to Ambrosiodmus ( Wood & Bright, 1992 ) , followed by a transfer to Streptocranus ( Hulcr et al. , 2007 ) . Its placement into Ambrosiophilus herein is based on a survey of more species and characters than by Hulcr et al . (2007) , and has 100% posterior probability in a multi-gene Bayesian phylogenetic analysis (Cognato et al. , unpublished).The holotype from Java has the same arrangement of teeth and striae as specimens from New Guinea . It is slightly shorter (5–10%), the declivital excavation is a little shallower and enclosed by less conspicuous wall. Ambrosiodmus optatus (which may eventually be transferred to Ambrosiophilus ) from Australia closely resembles A. sexdentatus , but differs in the shallowly excavated declivity. Both A. sexdentatus and A. optatus have mostly orange to light brown color. Biology: Recorded as an associate of Beaverium sundaensis (J.H., unpubl.) but the ecological significance of the record is uncertain. Examined material: Indonesia , Java, Batoerrad, ( holotype , USNM ); PNG : Madang Prov. (8), Oro Prov. (2), J. Hulcr 2002–2006 .