Trigonopterus humilis Riedel

Riedel, Alexander & Narakusumo, Raden Pramesa, 2019, One hundred and three new species of Trigonopterus weevils from Sulawesi, ZooKeys 828, pp. 1-153 : 1

publication ID

https://dx.doi.org/10.3897/zookeys.828.32200

publication LSID

lsid:zoobank.org:pub:2A63A74D-8B30-4C83-AB74-7BAF6AF6984E

persistent identifier

https://treatment.plazi.org/id/34BACAC4-74ED-4490-A117-4BEE925C13D5

taxon LSID

lsid:zoobank.org:act:34BACAC4-74ED-4490-A117-4BEE925C13D5

treatment provided by

ZooKeys by Pensoft

scientific name

Trigonopterus humilis Riedel
status

sp. n.

28. Trigonopterus humilis Riedel sp. n.

Diagnostic description.

Holotype, male (Fig. 28a). Length 2.30 mm. Color of antennae and legs ferruginous; remainder black. Body subovate; in dorsal aspect and in profile with distinct constriction between pronotum and elytron. Rostrum at middle with constriction, apical 1/2 slightly widening, spatulate; dorsally with median ridge and pair of submedian ridges; intervening furrows with rows of punctures and sparse setae; epistome short, posteriorly with transverse, subangulate ridge. Pronotum with weak subapical constriction; disk coarsely punctate, interspaces reticulate-scabrous; each puncture with erect piliform scale. Elytra markedly convex; coarsely punctate; interspaces somewhat irregularly tuberculate-costate, subglabrous; punctures each with suberect piliform scale. Metathoracic spiracle located on laterally projecting denticle. Femora edentate; anterior surface dull, weakly punctate-rugose, with sparse piliform scales. Metafemur with anteroventral ridge ending with indistinct blunt tooth; subapically with stridulatory patch. Abdominal ventrite 1 flat, with transverse row of coarse punctures; ventrite 5 with transverse depression, punctate. Penis (Fig. 28b) with sides subparallel, apex subangulate, with sparse setae; in apical 1/3 ventral surface with transverse blade-like process; apodemes 2.5 × as long as body of penis; transfer apparatus complex, symmetrical; ductus ejaculatorius with indistinct bulbus.

Material examined.

Holotype (MZB): ARC3059 (GenBank # MK260558), S-Sulawesi Prov., Tanah Toraja, Bittuang, Gn. Karoa, 02°55.032'S 119°40.365'E, 1992 m, sifted, 10-V-2013.

Distribution.

S-Sulawesi Prov. (Tanah Toraja). Elevation ca. 2000 m.

Biology.

In leaf litter of montane forest.

Etymology.

This epithet is the Latin adjective humilis, -e (close to the ground, small) and refers to the species´ small size and edaphic habitat.

Notes.

Trigonopterus humilis Riedel, sp. n. was coded as " Trigonopterus sp. 522".