Parateramocerus rondonianus Mantilleri, 2016

Mantilleri, Antoine, 2016, Two New Species and New Records of Acratini (Coleoptera: Curculionoidea: Brentidae), The Coleopterists Bulletin 70 (2), pp. 243-248 : 243-245

Parateramocerus rondonianus Mantilleri , new species

Holotype. ♂, Brazil, Rondônia, 62 km S Ariquemes, Fazenda Rancho Grande [10°18′S 62°52′W], 29.IX-10.X.1992, D. C. Marqua coll., prép. micro. n°AM-TAMU00002 ( TAMU).

Paratype. 1 ♀, idem holotype, prép. micro. n°AM-TAMU00003 ( TAMU) .

Description of Male. Length from tip of rostrum to apex of elytra 20.7 mm; length from front margin of pronotum to apex of elytra 12.1 mm; width across humeral calli 1.8 mm. Rostrum, antennae, and legs brownish,headwithgreenishmetallicsheen;pronotum brownish at base and apex, metallic green on disc; elytra metallic green, first 2 interstriae brownish ( Fig. 1 ). Head: Prorostrum much shorter than metarostrum and mesorostrum together, slightly grooved at base ( Fig. 5 ). Metarostrum with weak longitudinal carina, carinate on sides. Eyes almost as long as temples. Surface smooth, tapering backwards, with large but shallow interocular fovea; collar constriction quite well-marked. Sides of head and metarostrum ( Fig. 6 ) almost without sensorial pores; venter ( Fig. 7 ) with few very small pores hardly reaching mesorostrum,without median carina or groove.Venter of prorostrum smooth, glabrous. Antennae ( Fig. 8 ) with antennomeres 2–8 much longer than broad,

3) Teramocerus pachyodon , ♂ holotype; 4) T. pachyodon , ♀ paratype.

subconical, with few apical setae; 9 slightly longer than 8. Thorax: Pronotum almost 3X longer than broad, microreticulate, not punctate. Scutellum foveate, not inserted between elytra at apex. Elytra strongly microreticulate, not depressed at base of interstria 5, with rows of distinct punctures; interstria 3 weakly elevated on apical declivity. Apex of each elytron ( Figs. 9–10 ) with short, sharp tooth formed by interstriae 9–11, tooth not dorso-ventrally flattened. Legs almost glabrous, metacoxae with few short setae; all femora strongly pedunculate, glabrous; tibiae slightly hairy on inner side. First tarsomere shorter than 2–3 together; second tarsomere slightly longer than broad. Abdomen: Sternites III–IV not punctate, sternite III weakly flattened in median part, with few raised setae; sternites V–VI smooth; sternite VII with short hairs and very fine punctures ( Fig. 11 ). Sternites VII–VIII as in Fig. 20 . Tegmen ( Fig. 22 ) with parameroid lobes quite short, triangular, with few very small setae at apex. Penis ( Fig. 21 ) quite strongly pointed at apex; internal sac without proximal sclerite, only with extremely small sclerifications on inner wall; frena missing.

Description of Female. Length from tip of rostrum to apex of elytra 10.1 mm; length from front margin of pronotum to apex of elytra 7.0 mm; width across humeral calli 1.2 mm. Color as in male. Habitus as in Fig. 2 . Head: Prorostrum smooth, longer than metarostrum and mesorostrum together. Mesorostrum elevated, slightly grooved longitudinally. Metarostrum without median carina, not carinate on sides. Eyes longer than temples. Head hardly foveate between eyes, tapering backwards, collar constriction distinct. Sides and venter of head and metarostrum with few sensorial pores hardly reaching base of mesorostrum; no median elevated area separating both rows of pores. Antennae with antennomeres 2–8 slightly longer than broad, subconical, with few long setae; 9 less than 1.5X longer than 8; 9–10 subovoid. Thorax: Pronotum more than 2X longer than broad, not punctate, microreticulate. Elytra as in male, apical tooth smaller. Legs as in male. Abdomen: Sternites III–IV convex, glabrous, smooth; sternites V–VII glabrous, smooth. Vagina without internal sclerifications.

Distribution. Known only from the type series of two specimens collected in the Brazilian state of Rondônia, in the upper Amazonian Basin (Rio Madeira).

Remark. Parateramocerus rondonianus can be distinguished at first sight from P. goianus by its shorter prorostrum and by the presence of setae on the sternite III of the abdomen. The penis is also more pointed at the apex in P. rondonianus and lacks paramedian rods in its proximal part.

Figures

Figs. 1–4. Acratini, habitus. 1) Parateramocerus rondonianus, ♂ holotype; 2) P. rondonianus, ♀ paratype;

Figs. 5–11. Parateramocerus rondonianus, ♂. 5) Head, dorsal view; 6) Head, lateral view; 7) Head, ventral view; 8) Antenna; 9) Apex of right elytron, dorsal view; 10) Apex of left elytron, lateral view; 11) Abdomen.

Figs. 20–28. Acratini, genitalia. 20–22) Parateramocerus rondonianus, ♂ holotype: 20) Sternites VII-VIII; 21) Penis; 22) Tegmen. 23–25) Teramocerus pachyodon, ♂ holotype: 23) Sternites VII-VIII; 24) Penis; 25) Tegmen. 26–28) T. pachyodon, ♀ paratype: 26) Tergite VIII; 27) Genital tract (cox, coxites; scl, vaginal sclerification; spm, spermatheca; sty, stylus; vag, vagina); 28) Epipleurites VIII.