Anisandrus cristatus (Hagedorn, 1908) comb. nov., stat. res.

Smith, Sarah M., Beaver, Roger A. & Cognato, Anthony I., 2020, A monograph of the Xyleborini (Coleoptera, Curculionidae, Scolytinae) of the Indochinese Peninsula (except Malaysia) and China, ZooKeys 983, pp. 1-442 : 1

Anisandrus cristatus (Hagedorn, 1908) comb. nov., stat. res. Fig. 19E, F, K

Xyleborus cristatus Hagedorn, 1908: 377.

Xyleborus fabricii Schedl, 1964c: 217. Unnecessary replacement name.

Type material.

Syntypes (IRSNB). Not examined.

New records.

China: Yunnan, Gaoligong Mts, 24.57; 98.45, 2200-2500 m, 8-16.v.1995, V. Kuban (NHMB, 3; RABC, 1). India: [West Bengal], Darjeeling D[istrict], Rally, 850 m, 3.iv.1979, Bhakta B. (NHMB, 1); as previous except: Lepchajagat 7000 ft, 11.ix.1929, J.C.M. Gardner, ex Symplocos theaefolia (NMNH, 1); as previous except: Rangirum, 6000 ft (NMNH, 1). Laos: NE, Hua Phan, Ban Saluei, Phou Pan (Mt.), 20°12'N, 104°01'E, 1300-1900 m, 7.iv-25.v.2010, C. Holzschuh (NHMUK, 4; RABC, 1). Myanmar: Kambaiti, 7000 ft, 22.iv.1934, R. Malaise (NMNH, 1). Nepal: Arun Valley, Deurali, 27°30'N, 87°16'E, ~ 2100 m NN, 10.v.2014, J. Schmidt (NKME, 3); Koshi, Gorza, 2100 m, 5-6.vi.1985, M. Brancucci (NHMB, 9; RABC, 2); Kathmandu V[alley], Gufa-Gorza, 2800-2100 m, M. Brancucci (NHMB, 4); Koli Gandaki Khola, Chitra, Ghar Khola, 2400 m, Bhakta B. (NHMB, 1); Manaslu Mts, E slope of Ngadi Khola valley, 28°22'N, 84°29'E, 2000-2300 m, 14-16.v.2005, J. Schmidt (RABC, 2). Thailand: Chiang Mai, Doi Inthanon, 5.viii.[20]02, R. A. Beaver (RABC, 1). Vietnam: Cao Bang, 22°36.402'N, 105°52.397'E, 1601 m, 13.iv.2014, VN17, Cognato, Smith, Pham, ex standing stump (MSUC, 1). Lao Cai, Hoang Lien N.P., 22.35, 103.77, 1500-2000 m, 19.v.2019, VN171, S.M. Smith, A.I. Cognato, ex 1 cm DBH dead sapling (MSUC, 1).

Diagnosis.

3.35-3.7 mm long (mean = 3.55 mm; n = 5); 2.2-2.47 × as long as wide. This species is distinguished by the mesonotal mycangial tuft the length of the scutellum; elytral disc with or without a weak transverse saddle-like depression; declivital posterolateral margin costate to interstriae 5; declivity appearing bisulcate, moderately impressed from striae 1 and 2, interstriae 3 moderately inflated, tuberculate from base to apical 1/4 then becoming flattened and unarmed to apex; and large sized sharp incurved spine on interstriae 2 at base of declivity.

This species strongly resembles A. apicalis and A. congruens and is most easily distinguished by the larger size, more strongly impressed declivital sulci than A. apicalis and larger spines on interstriae 3 that are sharply pointed and backwardly hooked and subequal in size to the spine at the summit of interstriae 2.

Similar species.

Anisandrus apicalis , A. congruens , A. geminatus , A. niger , A. sinivali .

Distribution.

Bhutan*, China* (Yunnan), India (Meghalaya, 'Naga Hills’, Sikkim, West Bengal), Laos*, Myanmar*, Nepal*, Thailand*, Vietnam*.

Host plants.

This species has been recorded from Alnus ( Betulaceae ), Quercus ( Fagaceae ), Symplocos ( Symplocaceae ) ( Beeson 1930).

Remarks.

Xyleborus cristatus has the generic characters of Anisandrus and is here transferred to that genus. This species was synonymized with Ambrosiodmus apicalis (Blandford) [sic] by Wood (1989). It is here removed from synonymy and reinstated as a distinct species, based on the characters given above, and differences in DNA ( Cognato et al. 2020b).

Figures

Figure 19. Dorsal, lateral and declivital view of Anisandrus carinensis holotype, 4.5 mm (A, B, I), A. congruens holotype, 2.6 - 2.8 mm (C, D, J), A. cristatus, 3.35 - 3.7 mm (E, F, K), and A. cryphaloides holotype, 2.1 - 2.4 mm (G, H, L).