Cylindrepomus ansihagani Medina & Cabras, 2022

Medina, Milton Norman D., Baul, Melbert James G. & Cabras, Analyn A., 2022, Catalog of the genus Cylindrepomus Blanchard (Coleoptera, Cerambycidae, Dorcaschematini) in the Philippines, with description of a new species from northern Mindanao, ZooKeys 1116, pp. 23-32 : 23

Cylindrepomus ansihagani Medina & Cabras sp. nov.

Fig. 1A-D

Holotype

(Fig. 1 ), male: Philippines - Mindanao / Northern Mindanao / Misamis Oriental III.2022 / local collector (MMCP), to be deposited at PNM.

Other material examined.

Cylindrepomus bivitticollis Breuning, 1947, holotype male, NRM; C. sexlineatus Schultze, 1934, holotype female, MTKD.

Description.

Male. Dimensions (n = 1): LB: 14.0 mm. WH: 2.0 mm. LG: 1.5 mm. LL: 1.0 mm. WL: 1.0 mm. LP: 3.0 mm. WP: 2.0 mm. LE: 8.5 mm. WEH: 3.0 mm.

Teguments generally matt black, pro- and mesotibia reddish-brown near base; metatibia reddish-brown up to apical third; mid tarsus pale brown; hind tibia, tarsus, and claw light brown. Ventral side matt black, tomentose, covered with white recumbent pubescence on prosternum, prothorax, and abdomen.

Head and gena tomentose, covered with black recumbent pubescence; genae with few erect black hairs at the side; vertex with two small bands of white recumbent pubescence. Eyes prominent, black, as long as wide. Antennae long and slender (except scape), more than twice the body length, matt black; scape bulbous, coarsely granulated, with recumbent white setae near base, 2 × longer than wide; 2nd antennomere wider than long; 3rd antennomere coarsely granulated, 2 × longer than each of antennomeres 4-11; 5th antennomere slightly granulated; antennomeres 6-11 finely granulated.

Pronotum 1.5 × wider than long, tomentose, covered with black recumbent hairs; with two narrow bands of white recumbent pubescence, one at the base shaped like an elongated diamond, the other one triangle-shaped and near the margin; apical margin lined with golden setae.

Prosternum tomentose, covered with black recumbent hairs at middle and white recumbent setae at sides. Mesosternum and metasternum tomentose, covered with black and white recumbent setae. Mesepisternum and metepisternum tomentose, covered with white recumbent setae. 1st to 4th abdominal ventrites tomentose, covered with white and black recumbent setae with sparse golden setae at each side; pygidium tomentose, covered with full black recumbent setae, apex lined with golden hairs (Fig. 1B ).

Elytra 2.5 × longer than wide, with coarse, uniformly aligned punctatation; humeri slight recurved; suture and margin raised, slightly truncate along suture; apex lanceolate; with two thick bands of white recumbent pubescence, one at basal third longitudinal with apex expanded laterally, and one near the apex, narrowed toward the tip; a few tiny white spots near suture and margin at apical third. Scutellum tomentose, covered with white recumbent setae, obscuring surface (Fig. 1A ).

Coxae tomentose, covered with whitish recumbent hairs; trochanters reddish-brown; tibia armed with two small spines at base (colored black on protibia and mesotibia, pale brown on metatibia). Profemur slightly recurved near base.

Male genitalia (Fig. 2 A-J ): Tegmen ~1.5 mm long; lateral lobes slender, ~0.1 mm long and 0.6 mm wide; base with a broad central lobe bearing fine setae; apex bearing numerous golden setae, ~0.2-0.6 mm long. Aedeagus ~2.0 mm long and 0.5 mm wide, slightly recurved and tapering towards apex. Endophallus ~6.0 mm long.

Diagnosis.

Cylindrepomus ansihagani sp. nov. is distinct from its Mindanao endemic congeners ( C. bivitticollis and C. sexlineatus ) in having pronotum with two narrow bands of white recumbent pubescence, one at the base, shaped like an elongated diamond, the other a triangular band of white recumbent pubescence near the margin, while C. bivitticollis has pronotum with a complete, pale yellow longitudinal band on each side of the disc and C. sexlineatus has pronotum with a yellowish spot on each side at the base.

Etymology.

This new species is named after Datu Ramil P. Ansihagan, the tribal chieftain of the Higaunon Tribe, for his efforts in protecting and preserving the remaining forests in Barangay Eureka Gingoog City, Philippines.

Distribution of Cylindrepomus ansihagani sp. nov.

Philippines: Mindanao: Northern Mindanao, Gingoog City.

Notes on ecology, threats, and conservation of Cylindrepomus ansihagani sp. nov.

The species is known from a single specimen that was collected during the expedition. The species was collected at an elevation of approximately 1000-1100 m a.s.l. using hand nets along the boundary between an agro-ecosystem and a secondary forest. Most of the trees present are endemic species including but not limited to Shorea negrosensis (Red Lauan), Shorea contorta (White Lauan), and Quercus subsericea (Philippine Ulayan Tree), all of which are native to the Philippines and considered highly valued trees.

The current threat to the species’ habitat is the continued conversion of the remaining secondary forests into agricultural lands. Farmers use various chemicals such as pesticides, herbicides, and fungicides that could affect the species’ population There is a need to conduct more expeditions, covering more habitats, to find additional populations of this and other species. Hence, research identifying the exact species distribution, area of occupancy and the species’ extent of occurrence is important as a guide in making a future IUCN Red List assessment of this endemic species.

Figures

Figure 1. Cylindrepomus ansihagani sp. nov. male holotype, habitus A dorsal aspect B ventral aspect C frons D lateral aspect.

Figure 2. Cylindrepomus ansihagani sp. nov. A genitalia, dorsal aspect B genitalia, lateral aspect C genitalia, ventral aspect D aedeagus, ventral aspect E aedeagus, dorsal aspect F aedeagus, lateral aspect G tegmen, dorsal aspect H tegmen, lateral aspect I tegmen, ventral aspect J tergite VIII. Abbreviation: En - Endophallus.