Setizembrus lyali Germann, 2025

Germann, Christoph, 2025, Setizembrus Germann, a new genus of the subtribe Cotasteromimina with five new species from Malaysia (Coleoptera, Curculionidae: Molytinae, Pissodini), Zootaxa 5659 (2), pp. 283-295 : 290-291

Setizembrus lyali Germann sp. nov.

http://zoobank.org/ urn:lsid:zoobank.org:act:4CB1F1FF-C3EF-4642-AF77-23C7FC0C454D

Figs. 4 A–H .

Holotype female: MALAYSIA, PAHANG, 2003; Cameron Highlands ; TANAH RATA, 1500–1700m; P. Pacholátko leg. 1.-13.ii. ( NMB) . Paratype female: MALAYSIA: PAHANG, Tanah Rata, Mount Jasar env., 4°28’36”N, 101°21’49”E, 16–20.iv.2015, 1500–1690m, E. Jendek & O. Sausa ( CMNC) .

Description. Body length: 2.85–3.35 mm. Body dark auburn ( Fig. 4A–C ), prothorax and elytra with both, bowed, light brown, pointed and raised, clubbed, elongate scales, more than four times longer than wide, rounded apicad. Rostrum shorter than pronotum ( Figs 4C, D ); in dorsal view weakly narrowed just behind antennal insertion, widening anteriad, and towards frons. Funicular antennomeres subequal. Club of antennae oval ( Fig.4H ). Prothorax slightly transverse (L/B: 0.9) ( Fig. 4A ), weakly constricted before anterior margin; dorsal surface with coarse, polyhedric punctures separated by thin and sharp ridges ( Figs 4A ). Basisternum flat and coarsely punctate ( Fig. 4B ). Procoxae separated by half of coxal diameter; mesocoxae separated by their diameter; metacoxae separated by less than twice their diameter ( Fig. 4B ). Externally visible part of scutellum small and broadly pentagonal ( Fig. 4E ). Elytra elongate (L/B: 1.7), dorsally widest just behind shoulders, parallel along first third, attenuate from there to apex, hind wings absent. Intervals as wide as striae, with tiny sharp, dark and shiny tubercles, uneven elytral intervals weakly raised; raised (uneven) intervals on elytra with regularly arranged clubbed-elongate raised scales and scarce shorter, pointed recumbent scales; even intervals with irregularly arranged clubbed-elongate scales. Each puncture of striae laterally with a small granule and with a tiny recumbent bristle at anterior margin. Meso-, metaventrites and abdominal ventrites coarsely punctate; each puncture with a thin clubbed and bowed, yellowish scale ( Fig. 4B ). Legs slender, femora clubbed, dentate with a blunt swelling ( Fig. 4F ). Tarsi with bilobed third tarsomere; claws free. Female genitalia with c-shaped spermatheca ( Fig. 6P ), weakly sclerotized gonocoxites with elongate cylindrical styli ( Fig. 6Q ). Ventrite 7 ( Fig. 6R ). Male unknown.

Derivation of name: This species is dedicated to Dr. Christopher Lyal (BMNH, London), renowned expert of molytine weevils for his appreciated guidance within that megadiverse group.

Remark: The possibility that these two females of S. lyali are the unknown females of either the sympatric S. semai or S. bispinosus was considered but dismissed as there are a number of additional differences between them, especially the form of the pronotal and elytral surface structure and the more slender antennae with the oval club segment (similar to S. geiseri and S. pendleburyi ).

Figures

FIGS 4A–C. Setizembrus lyali. Holotype habitus dorsal, ventral and lateral views. 4D. Frontolateral view. 4E. Scutellum 3F. Latero-ventral view of blunt swelling on right profemur. 4G. Ventrites. 4H. Antenna (Photos: C. Germann).

FIGS 6A–C. Setizembrus semai. Holotype penis ventral, dorsal and lateral views. D–F. Setizembrus bispinosus. Holotype, same. G–I. Setizembrus geiseri. Holotype, same. J–L. Setizembrus pendleburyi. Same. M–O. Female genitalia of S. geiseri. M. Spermatheca. N. Gonocoxites. O. Ventrite 7. P–R. Same for S. lyali. S–U. Same for S. pendleburyi. (Photos: C. Germann).