Trigonopterus bisignatus Riedel

Riedel, Alexander & Taenzler, Rene, 2016, Revision of the Australian species of the weevil genus Trigonopterus Fauvel, ZooKeys 556, pp. 97-162: 109-110

publication ID

http://dx.doi.org/10.3897/zookeys.556.6126

publication LSID

lsid:zoobank.org:pub:FFA73BF5-1AA3-4BF0-85B8-1C44F838B040

persistent identifier

http://treatment.plazi.org/id/5A37941C-DBC6-4012-BBB7-F22D8B6C910D

taxon LSID

lsid:zoobank.org:act:5A37941C-DBC6-4012-BBB7-F22D8B6C910D

treatment provided by

ZooKeys by Pensoft

scientific name

Trigonopterus bisignatus Riedel
status

sp. n.

Taxon classification Animalia Coleoptera Curculionidae

7. Trigonopterus bisignatus Riedel   sp. n.

Diagnostic description.

Holotype (Fig. 7a). Length 2.73 mm. Color black; antenna and legs ferruginous. Body subovate, with shallow constriction between pronotum and elytron; in profile convex. Rostrum with median ridge and pair of submedian ridges ending in apical third; intervening furrows with rows of coarse punctures each containing one mesad directed seta; base dorsally protruding, markedly projecting from profile subangularly; epistome posteriorly with curved ridge bearing 4 low denticles. Forehead coarsely punctate-rugose. Pronotum with indistinct subapical constriction; disk coarsely punctate-reticulate; with median costa; near middle with pair of very weak swellings, further laterad with clusters of yellow recumbent scales. Elytra with striae deeply incised; intervals costate, microreticulate, with shallow punctures and few scattered recumbent scales; base markedly bisinuate. Legs. Femora densely punctate. Profemur with subbasal callus anteriorly projecting. Tibiae subbasally with dorsal angulation. Abdominal ventrites 1-2 laterally swollen, medially forming common cavity; ventrite 5 punctate, flat. Penis (Fig. 7b) with sides of body weakly converging, at middle with constriction, widening to subtriangular apex; transfer apparatus flagelliform, ca. 1.5 × longer than body of penis; ductus ejaculatorius near insertion to transfer apparatus sclerotized, without bulbus. Intraspecific variation. Length 2.73-3.03 mm.

Material examined.

Holotype (QMBA): ARC3752 (EMBL # LN888232), Queensland, Daintree N.P., NW Mossman, Manjal Jimalji (Devils Thumb) trail, S16°23.571', E145°19.058', sample 2, 377 m, 20-IV-2014. Paratypes ( ANIC): Queensland: 1 ex, ARC4053 (PCR failed), Windsor Tableland, 35 km NW Mt. Carbine, 1050 m, rainforest, sieved litter, Berlesate No. 393, 16-IV-1982; 2 exx, ARC4050 (PCR failed), Mossman Gorge N.P., 6 km SW of Mossman, rainforest leaf litter, 50 m, 11-VII-1982.

Distribution.

Queensland: Daintree N.P., Windsor Tableland.

Biology.

Sifted from leaf litter in primary forest.

Etymology.

This epithet is a combination of the Latin prefix bi- (two) and the participle signatus (marked) and refers to the pair of squamose patches on the pronotum.

Notes.

Trigonopterus bisignatus   Riedel, sp. n. was coded as " Trigonopterus   sp. 560".