Stereodermus platycornis Mantilleri,

Mantilleri, Antoine, Bartolozzi, Luca & Sforzi, Alessandra, 2017, Brentidae of Peru (Coleoptera: Curculionoidea), Zootaxa 4221 (1): -

publication ID 10.5281/zenodo.246755

publication LSID

persistent identifier

treatment provided by


scientific name

Stereodermus platycornis Mantilleri

sp. nov.

Stereodermus platycornis Mantilleri  , sp. nov.

( Figs. 9–18View FIGURES 1 – 18)

Type material. Holotype: ♂, Peru, Tambopata prov. , Madre de Dios Dpto., 15 km NE Puerto Maldonado Reserva, Cuzco Amazónico, 12°33'S 69°03'W, 200 m, camp, 21.VI.1989, J.S. Ashe & R.A. Leschen, at light, prép. micro. n°KUNHM-AM 0 0 0 0 1 ( KUNHM).GoogleMaps 

Paratypes: 1 ♀, idem holotype, prép. micro. n° KUNHM-AM 0 0 0 0 2 (KUNHM); 1 ♂, idem, 2.VII.1989 (KUNHM); 1 ♂, Madre de Dios, Cocha Salvador, Reserved Zone Manu National Park , 310 m, 12°00'13''S 71°31'36''W, 20.X.2000, R. Brooks, on Xylariaceae  ( KUNHM)GoogleMaps  ; 1 ♀, Dept San Martin , vicinity of Rioja, 24.IX.1936, F. Woytkowski ( KUNHM)  .

Description. Length from apex of rostrum to apex of elytra: 4.6–5.8 mm; length from apex of pronotum to apex of elytra: 3.5–4.8 mm; width across humeral calli: 0.7–0.9 mm. Habitus: Fig. 9View FIGURES 1 – 18.

Brown red with light darker postmedian blotch on elytra.

Head ( Fig. 10View FIGURES 1 – 18) broader than long, punctate, base slightly concave. Temples shorter than eyes, with few squamous setae on upper part. Cephalic median groove weak or missing. Vertex, metarostrum and mesorostrum grooved. Sides of metarostrum ( Fig. 11View FIGURES 1 – 18) glabrous. Prorostrum shorter than head, metarostrum and mesorostrum together, its length similar in both sexes. Venter of head and metarostrum with dull longitudinal median shallow groove, almost glabrous. Venter of mesorostrum with squamous setae. Antennal scape longer than antennomeres 2–3 together; articles 2–8 much broader than long, cylindrical; articles 3–8 with one row of raised setae; articles 9– 11 strongly laterally flattened in both sexes ( Fig. 12View FIGURES 1 – 18).

Pronotum ( Fig. 10View FIGURES 1 – 18) shiny, punctate, with prostrate fine setae; longitudinal median groove deeper at base, weakly connected to collar constriction. Metasternum with large punctures on sides; venter longitudinally grooved. Elytra glabrous, shiny, base straight to weakly concave, humeral calli not projecting forward; striae 3–10 strongly punctate. Femora unarmed, glabrous except few thick setae at base.

Abdomen ( Fig. 13View FIGURES 1 – 18) with sternites III –IV punctate (but without row of punctures at apex of sternite IV), longitudinally depressed; sternites V –VI with fine line of shallow setose punctures; sternite VII of male with several large punctures, almost smooth in female ( Fig. 14View FIGURES 1 – 18). Tergite VIII of female strongly dentate, with apical median notch; epipleurites VIII with short spiculum; spermatheca: Fig. 18View FIGURES 1 – 18. Sternites VIII –IX of male: Fig. 15View FIGURES 1 – 18. Tegmen with elongate, thin parameroid lobes ( Fig. 16View FIGURES 1 – 18). Penis: Fig. 17View FIGURES 1 – 18.

Etymology. The specific epithet refers to the strongly flattened articles 9–11 of antennae.

Remarks. Stereodermus platycornis  sp. nov. is easily differentiated from all other taxa of the genus: it is the sole known species with articles 9–11 of antennae flattened. Its affinities with other Stereodermus  are unclear. In the key given by Mantilleri & Sforzi (2006), it is close to S. puncticollis Sharp, 1895  , known from Central America. Smaller size, shorter parameroid lobes and, above all, flattened antennomeres, separate the two species.