Diuncus haberkorni (Eggers)

Beaver, R. A., Sittichaya, W. & Liu, L-Y., 2014, A Synopsis of the Scolytine Ambrosia Beetles of Thailand (Coleoptera: Curculionidae: Scolytinae), Zootaxa 3875 (1), pp. 1-82 : 45-46

86. Diuncus haberkorni (Eggers)

Xyleborus haberkorni Eggers, 1920: 43 .

Diuncus haberkorni (Eggers) : Hulcr & Cognato, 2009: 31 .

Xyleborus taichuensis Schedl, 1952: 64 . Synonymy: Beaver & Liu, 2010: 26.

Xyleborus approximatus Schedl, 1950: 77 . Synonymy: Hulcr & Cognato, 2013: 80.

Thai distribution: C: Kanchanaburi, Nakhon Nayok, Phetchaburi, Suphanburi ; N: Chiang Mai, Phetchabun; N-E: Chaiyaphum, Loei, Ubon Ratchathani; S: Chumphon, Nakhon Sri Thammarat, Surat Thani ( Hulcr & Cognato 2009).

New records: More than 130 specimens have been collected in all parts of the country, the majority in the southern provinces of Nakhon Sri Thammarat and Surat Thani. The record of Diuncus quadrispinosulus (Eggers) by Sittichaya et al. (2012) from an unspecified southern province should be referred to D. haberkorni .

Other distribution: Recorded from India and Sri Lanka through Southeast Asia to Japan (Ryukyu Is.) and Taiwan in the North , and to New Guinea in the East. It also occurs in China (Yunnan) ( R. A. Beaver, unpublished records). The species was originally described from German East Africa ( Tanzania), but had not been found in Africa again since the description ( Schedl 1963). However , a recent (November 2013) collection from mangroves in South Africa ( R. A. Beaver, unpublished) shows that it is is still present on the African continent. It is evidently an Oriental species introduced to Africa through human agency. (4)

Biology: Polyphagous ( Beeson 1930, Browne 1961a). It usually attacks small branches and makes longitudinal tunnels in the middle of the branch ( Browne 1961a). The species is sometimes associated with other xyleborines ( Beaver & Browne 1979, Hulcr & Cognato 2010b), but may also occur alone ( Hulcr & Cognato 2009).

Illustrations: P (Hulcr 2013); D ( Maiti & Saha 2004 as Xyleborus haberkorni ).