Stictodex dimidiatus (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 : 59

122. Stictodex dimidiatus (Eggers)

Xyleborus dimidiatus Eggers, 1927a: 404 .

Stictodex dimidiatus (Eggers) : Hulcr & Cognato, 2013: 125.

Xyleborus tunggali Schedl, 1936a: 32 . Synonymy: Hulcr & Cognato, 2013: 125.

Xyleborus decumans Schedl, 1953a: 301 . Synonymy: Hulcr & Cognato, 2013: 125.

Thai distribution: C: Suphanburi; N: Chiang Mai ( Beaver & Browne 1975 as Xyleborus tunggali ), Loei, Phetchabun; N-E: Sakhon Nakhon; S: Chumphon, Nakhon Sri Thammarat, Surat Thani.

New records: Chumphon, Sawi distr., 10° 19' 07.7'' N, 99° 01' 40.2'' E, 103 m, durian plantation, EtOH trap, 1.xi.2009 (W. Sittichaya) (40); Thung Tako Distict , 10° 02' 41.9'' N, 99° 01' 5.7'' E, 86 m, durian plantation, EtOH trap, 1.xi.2009 (W. Sittichaya) (27) ; Loei, Phu Ruea NP, office, 17° 28.805' N, 101° 21.242' E, 870 m, MT, 12–19.vii.2006 (P. Tamtip) (1); Nakhon Sri Thammarat, Chang Klang Distr. , 08° 20' 59.7'' N, 99° 40' 14.6'' E, 70 m, Durian plantation, EtOH trap, various dates from 01.xii.2009 (W. Sittichaya) (4) ; Phetchabun, Nam Nao NP, Forest check point, 16° 43.687' N, 101° 33.754' E, 924 m, MT, 13–20.xi.2006 (N. Hongyothi) (1) ; Sakhon Nakhon, Phu Phan NP, Nam Hom Waterfall , 17° 7.411' N, 104° 1.016' E, 347 m, MT, 25–31.iii.2007 (S. Tongboonchai) (1) ; Suphanburi, Pu Toei NP, Huai Mongpae , 14° 56.985' N, 99° 26.78' E, 300 m, MT, 1–7.ix.2008 (Wangkum, P.) (1) ; Surat Thani, Bhan Nasan Distr. , 08° 48' 57.3'' N, 99° 23' 52.2'' E, 62 m, durian plantation, EtOH trap, 1.x.2009 – 31.xii.2010 (W. Sittichaya) (13) .

Other distribution: Indonesia (Maluku), Malaysia (E. & W.), New Guinea, Sri Lanka. Intercepted in Japan in timber from the region. The species also occurs in Brunei Darussalam, Laos and Vietnam (R. A. Beaver, unpublished records). (4)

Taxonomy: Hulcr & Cognato (2013) erected the genus Stictodex to include this species and one other.

Biology: Most host records are from the Dipterocarpaceae , but other tree families are also occasionally attacked ( Browne 1961a as Xyleborus decumans and X.tunggali ).

Illustrations: P (Hulcr 2013, Hulcr & Cognato 2013).