Zyras (Zyras) bettotanus CAMERON, 1930

Assing, Volker, 2017, On Zyras sensu strictu in the East Palaearctic and Oriental regions, with a focus on the faunas of the Himalaya, India, Sri Lanka, Thailand, and Sulawesi (Coleoptera: Staphylinidae: Aleocharinae: Lomechusini), Beiträge Zur Entomologie = Contributions to Entomology 67 (1), pp. 117-192 : 156-157

Zyras (Zyras) bettotanus CAMERON, 1930

( Map 9 )

Zyras bettotanus CAMERON, 1930: 168 .

Zyras (Zyras) drescheri CAMERON, 1939b: 17 ; syn. n.

Zyras (Zyras) atrapicalis ASSING, 2016a: 140 f.; syn. n.

Type material examined: Z. bettotanus : Holotype ♂: “ N. Borneo . Bettotan , / Nr. Sandakan . Aug. 23rd 1927 / Zyras bettotanus Cam. Type / M. Cameron. Bequest. B.M. 1955-147. / Holotype / Holotypus Zyras bettotanus Cameron , rev. V. Assing 2017” ( BMNH).

Z. drescheri : Lectotype ♂, present designation: “Batoerraden, G. Slamat. Java, F.C. Drescher. 7-9.VIII.1926 / Z. drescheri Cam Cotype / M. Cameron. Bequest. B.M. 1955-147. / Syntype / Lectotypus ♂ Zyras drescheri Cameron , desig. V. Assing 2017 / Zyras bettotanus Cameron , det. V. Assing 2017” ( BMNH) . Paralectotype ♀: same data as lectotype ( BMNH) .

Comment: The original description of Z. bettotanus is based on a unique holotype from “ North Borneo; Bettotan” ( CAMERON 1930). HLAVÁČ et al. (2011) list the species as incertae sedis, but PACE (2008) assigned it to Zyras sensu strictu in a key to the Zyras species of Borneo. CAMERON (1939b) described Z. drescheri based on an unspecified number of syntypes from “Batoerraden: G. Slamat”, “Bandoeng Dago”, and “G. Tangkoeban Prahoe”. Two of the syntypes, a male and a female, were found in the Cameron collection at the BMNH. The male is designated as the lectotype. Zyras atrapicalis was recently described based on material from the Chinese province Yunnan. An exmination of the type material of all three names revealed that it is conspecific, so that Z. drescheri and Z. atrapicalis are placed in synonymy with Z. bettotanus . For a detailed description and illustrations see ASSING (2016a).

The coloration of this species is remarkably variable. While the head and pronotum are usually blackish in material from most regions, some specimens from Java have the head and pronotum reddish, or the head reddish and the pronotum brown.

Additional material examined: Thailand: 3 exs., Tak province, Umphang district , Song Bae Stream, Thung Yai Wildlife Sanctuary , 15°28'N, 98°48'E, 300 m, evergreen rain forest, 18–27.IV.1988, leg. Brendell ( BMNH) ; 11 exs., Tak province, Umphang district, Mae Chan – Mae Klong confluence,, Thung Yai Wildlife Sanctuary , 15°30'N, 98°48'E, 300 m, evergreen rain forest, 27.IV.–6.V.1988, leg. Brendell ( BMNH, cAss) ; 1 ex., Tak province, Umphang district, Mae Chan – Mae Klong confluence, Thung Yai Wildlife Sanctuary , 15°30'N, 98°48'E, 300 m, edge of Karen clearing, 27.IV.–6.V.1988, leg. Brendell (cAss) . Malaysia: 1 ♀, Cameron Highlands , 22–30.III.1984, leg. Rougemont (cRou) ; 7 exs., Selangor, Ulu Gombak Field Studies Centre , 250 m, flight interception trap, III.2004, leg. Maruyama et al. (cHla, cMar, cAss) ; 8 exs., Borneo, Sabah, Sandakan , S Lokan, flight interception trap, III.1997, leg. Chung ( BMNH, cAss) ; 1 ex., same data, but IX.1996 (cAss) ; 4 exs., Sabah, Sandakan, Sepilok , flight interception trap, X.1996, leg. Chung ( BMNH, cAss) ; 2 exs., Sabah, Danum valley , B.R. L., flight interception trap, 14–16.II.2007, leg. Rougemont (cRou) . Indonesia: 2 ♂♂, 3♀♀, Jawa Barat, Bogor, Kebun Raya Bogor , 250 m, flight interception trap, 20.I.–7. II.2004, leg. Maruyama (cMar, cAss) ; 1 ♂, 1 ♀, Jawa Barat, Cianjur, Kebun Raya, Cibodas , 1400 m, flight interception trap, 29.I.-4.II.2004, leg. Maruyama et al. (cMar, cAss) ; 9 exs., Borneo, Kalimantan Tengah, Busang–Rekut confluence, 0°03'S, 113°59'E, flight interception trap, VIII.2001, leg. Brendell & Mendel ( BMNH, cAss) . Brunei: 1 ex., Temburong District, Kuala Belalong FSC, 4°34'N, 115°07'E, 150 m, steep forest, Malaise trap, X.1992, leg. Martin ( BMNH) .

Distribution and natural history: Zyras bettotanus is evidently widespread in the Oriental region ( Map 9 ). It is now known from South China, Thailand, Peninsular Malaysia, Java, and Borneo ( Malaysia: Sabah; Indonesia: Kalimantan Tengah; Brunei). At least the majority of the specimens was collected with flight interception and Malaise traps at low altitudes (150–300 m).

Figures

Map 9: Revised distributions of Zyras bettotanus (black circles), Z. nilgiriensis (star), and Z. longilobatus (white circles) in the