Temnocerus potosi, Hamilton, 2010

Hamilton, R. W., 2010, Central American Temnocerus Thunberg, 1815 (Coleoptera: Rhynchitidae), Insecta Mundi 2010 (128), pp. 1-42 : 29-30

Temnocerus potosi , new species

( Fig. 1 , 37, 38 , 76 , 92 )

Type locality. Mexico, San Luis Potosi, Taman Type depository. Canadian Museum of Nature ( CMNC)

Type specimens. Holotype male and allotype with the following label data: MEX: SLP, Taman, 20 km SW Tamazunchale , 11.VI.83, M. Kaulbars ( CMNC) . Paratype data as follows: MEXICO: 1 male, Mexico, N.L. [Nuevo Leon], Sierra de Picachas, 15 km NE Higueras, Aug. 24, 1977, 1300 m, oaks & shrubs, A. N. Garcia (CWOB) . 2 females, Mexico, Nuevo Leon, Cerro Potosi n. Galeana, 4-vi-83, 9,500’, beating scrub oaks, R. Anderson ( CMNC).

Description. Color and pubescence: Body brownish-black with a faint rosy brassy luster above. Pubescence inconspicuous, above with short reclinate brownish setae. Pleura and sterna with longer whitish brown setae. Abdominal ventrite 4 with pair of setal tufts either side of middle. Size: Male (n = 2) 2.7 × 1.0 mm to 2.8 × 1.2 mm; Female (n = 3) 2.6 × 1.0 mm to 3.3 × 1.2 mm. Head subrectangular, slightly longer than wide, moderately punctured; punctures small, round; interspaces minutely granulose; eyes large, oval, moderately protuberant. Rostrum slightly longer than head, parallel-sided, densely punctured except mid-dorsal tip, with distinct mid-dorsal channel extending from rostral base to antennal insertions; interspaces in basal half minutely granulose; in lateral view weakly arcuate; distinctly flattened in apical 1/3. Antenna inserted near basal 1/5 of rostrum; scape and funicular segment 1 ovoglobose, subequal; funicular segments 2-4 narrow, weakly clavate, becoming slightly shorter; segments 5-7 short, bead-like; club abrupt; basal club segment slightly longer than middle and terminal segment, narrowed at base; middle and terminal segments subequal in length; middle segment subrectangular; terminal segment acuminate. Pronotum slightly longer than wide, widest just behind middle; sides distinctly rounded out; densely punctured; interspaces minutely granulose. Scutellum subquadrate, about as long as wide, punctured. Elytra elongate, more than twice as long as pronotum; widest just behind middle; humeri simple; striae deeply impressed, similar throughout; with single setigerous puncture on interspaces between striae; intervals distinctly raised, smooth, shiny, with single row setigerous punctures. Thoracic pleura and sterna moderately to densely punctured. Abdominal ventrites moderately to sparsely punctured; ventrite 4 with distinct pair setal tufts each side of middle.

Distribution. Adults of this species are known only from San Luis Potosi and Nuevo Leon, Mexico ( Fig. 92 ).

Etymology. The specific epithet is derived from the Mexican state of San Luis Potosi and is applied as a noun in apposition.

Comments. Adults are moderate in size and have a rosy bronze luster above. The pronotal punctures are deeply impressed and very dense. The elytral striae are deeply impressed and the intervals are distinctly raised. The apical portion of the rostrum ( Fig. 1 ) is distinctly tapered and depressed (“needle-nosed”). The “needle nosed” rostrum is also present in T. regularis and T. pseudaeratus . The male has a pair of long setal tufts on abdominal ventrite four. The aedeagus ( Fig. 76 ) has a wide median lobe that tapers gradually to the distinctly truncate pedon apex. The tectum is wide, spatulate and bluntly pointed. The tegminal cap piece is finger-like and the knob-like pigmented apex bears a terminal cluster of very short setae. Endophallic bands are short and linear.

Plant association. Unknown.

Figures

Figure 1-2. Temnocerus species, lateral habitus. 1) T. potosi n.sp. 2) T. abdominalis (Voss).

Figure 35-46. Heads of Temnocerus species, frontal view, male left and female right. 35-36) T. oculatus (Sharp). 37-38) T. potosi n.sp., holotype and allotype. 39-40) T. pseudaeratus n.sp., holotype and allotype. 41-42) T. pueblensis n.sp., holotype and allotype. 43-44) T. pusillus (Sharp). 45-46) T. regularis (Sharp).

Figure 59-86. Aedeagal tegmen and median lobe of Temnocerus species, dorsal view, 64X. 59) T. abdominalis (Voss). 60) T. chiapensis n. sp. 61) T. chiriquensis (Sharp). 62) T. confertus (Sharp). 63) T. cyaneus n. sp. 64) T. ellus n. sp. 65) T. giganteus n. sp.; 66) T. guatemalenus (Sharp). 67) T. guerrerensis n. sp. 68) T. herediensis n. sp. 69) T. mexicanus n. sp. 70) T. michoacensis n. sp. 71) T. minutus n. sp. 72) T. niger n. sp. 73) T. oaxacensis n. sp. 74) T. obrieni n. sp. 75) T. oculatus (Sharp). 76) T. potosi n. sp. 77) T. pseudaeratus n. sp. 78) T. pueblensis n. sp. 79) T. pusillus (Sharp). 80) T. regularis (Sharp). 81) T. rostralis n. sp. 82) T. rugosus n. sp. 83) T. salvensis n. sp. 84) T. tamaulipensis n. sp. 85) T. thesaurus (Sharp) 86) T. yucatensis n. sp.

Figure 91-94. Distribution of Temnocerus species. 91) T. rugosus, red; T. obrieni, black; T. oaxacensis, blue; T. niger, green. 92) T. pseudaeratus, black; T. potosi, blue; T. cyaneus, green; T. oculatus, red. 93) T. pueblensis, red; T. pusillus, blue; T. regularis, black; T. salvensis, green. 94) T. tamaulipensis, red; T. thesaurus, blue; T. yucatensis, black.