Temnocerus oculatus ( Sharp 1889 )

Hamilton, R. W., 2010, Central American Temnocerus Thunberg, 1815 (Coleoptera: Rhynchitidae), Insecta Mundi 2010 (128), pp. 1-42 : 28-29

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Temnocerus oculatus ( Sharp 1889 )


Temnocerus oculatus ( Sharp 1889)

( Fig. 35, 36 View Figure 35-46 , 75 View Figure 59-86 , 92 View Figure 91-94 )

Type locality. Guatemala, Guatemala City Type depository. The Natural History Museum, London, England ( BMNH)

Specimens examined. Holotype male with the following labels: Guatemala City, Champion, Rhynchites oculatus type D. S. [on card with specimen]; Type [circular label with red margin]; Guatemala City, 6,000 ft. Champion ; B.C.A. Col. iv.a, Rhynchites oculatus Sharp ; Sharp coll. 1905-313 [upside down label]; GUATEMALA: 2 females, Baja Verapaz, 14.5 km N. Salami on Pantin Rd., 01.vi.1991, 1620 m, H & A Howden ( CMNC). MEXICO: 2 females, Chis., 17 mi W P.N. Montebello, vii-301974, 4,800’, O’Brien & Marshall ( CWOB); 1 female, Chis., hwy 24, 9 mi SE Teopisca, v.16, 1969, H.F. Howden; 1 female, Oaxaca, 5 km N Oaxaca, 14.vi.1979, 1700 m, H. & A. Howden; 1 female, Chiapas, Laguna Belgica , 16 km NW Ocozocoautla, 31.v. 1990, 970 m, H & A Howden; 1 female, Guerrero, 12.0 km SW Xochipala, 14-vii- 1992, 1700 m Oak /acacia woodland, on Quercus, R. S. Anderson ; 1 female, N. L. [Nuevo Leon], Chipinque Mesa nr. Monterrey , vii. 8.1963, 5,400 ’, A.T. Howden ( CMNC). 1 male, Hidalgo, 6 mi. S. Jacala, March 18, 1975, Clark & Schaffner; 1 male, Puebla, 4.7 mi SW La Cuabre, 5100’, vii-23-1987, J. Woolley, & G. Zolnerowich, 8/055 ( TAMU). GoogleMaps

Description. Color and pubescence: Body blackish throughout with a faint rosy and brassy luster above. Pubescence inconspicuous and consisting of short fine brownish reclinate setae. Abdominal ventrites with longer more whitish setae along each side of midline. Size: Male (n = 2) 2.3 x 0.9 mm to 2.5 x 1.0 mm; Female (n = 8) 2.2 x 0.8 mm to 2.4 x 0.9 mm. Head quadrate, about as long as wide, sparsely punctured; punctures small, round; interspaces minutely granulose; frons wide, about twice as wide as rostral base; eyes large, oval, moderately protuberant. Rostrum short, about.33 times longer than head, parallel-sided; in lateral view nearly straight, apically depressed; basi-dorsal 1/2 minutely granulose as in head interspaces; sides moderately punctured; apico-dorsal 1/4 smooth, shiny. Antenna inserted at basal 1/4; scape and funicular segment 1 ovoglobose, subequal,; funicular segments 2 and 3 narrow, weakly clavate; segment 2 slightly longer than 3; segments 4-7 shorter, bead-like; segments 6 and 7 slightly more robust; club abrupt; basal and middle club segments subequal, wider than long; terminal segment smaller than basal or middle segment, rounded, bluntly acuminate. Pronotum about as long as wide, weakly constricted anteriorly, widest behind middle, very densely punctured; interspaces minutely granulose. Scutellum rectangular, slightly wider than long, minutely granulose. Elytra about twice as long as pronotum, widest just behind middle; humeri simple; striae subquadrate, deeply impressed, similar in size throughout; intervals narrow, raised, with single row of setigerous punctures; strial interspaces with single setigerous puncture. Thoracic pleura and sterna densely with moderate to dense coarse setigerous punctures. Adominal ventrites distinctly concave, with sparse, small, setigerous punctures; punctures along each side of midline with longer more numerous setae; lateral interspaces minutely granulose.

Distribution. A widespread species with adults recorded from central Mexico south into Guatemala and Honduras ( Fig. 92 View Figure 91-94 ).

Comments. The adults of this species can be recognized by the rostrum that is nearly straight, parallelsided, distinctly depressed apically (“needle nosed”) and with minute granulations in the dorso-basal half. The pronotum is very densely punctured and weakly constricted anteriorly. The aedeagus ( Fig.75 View Figure 59-86 ) has a short apically tapered median lobe with the pedon apex sharply truncate. The tectum is spearheadshaped. The tegminal cap piece is finger-like and the knob-like pigmented apex bears a cluster of setae. Endophallic bands are linear, pigmented and elongate. The aedeagus of this species shows affinities with those of T. potosi and T. pseudaeratus ( Fig. 76 and 77 View Figure 59-86 ).

Plant association. A single female specimen is recorded from Quercus sp. in the Mexican state of Guerrero.


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