Temnocerus regularis ( Sharp 1889 )

Hamilton, R. W., 2010, Central American Temnocerus Thunberg, 1815 (Coleoptera: Rhynchitidae), Insecta Mundi 2010 (128), pp. 1-42 : 33-34

Temnocerus regularis ( Sharp 1889)

( Fig. 45, 46 , 80 , 93 )

Pselaphorhynchites lindae Hamilton, 1971 , new synonymy

Type locality. Mexico, Hidalgo, Zacualtipan

Type depository. Natural History Museum, London, England ( BMNH)

Specimens examined. MEXICO: Holotype [female?] with the following data: Zacualtipan, Hoge, Rhynchites regularis Type [hand written on card with specimen]; Type [circular label with red margin]; Zacualtipan Hidalgo Hoge; B.C.A. Col. Iv. 3 Rhynchites regularis Sharp ; Sharp Coll. 1905-313 [upside down on pin] ( BMNH). 1 male and 1 female, Mich. [Michoacan], 18 mi. W. Patzcuaro , 14 Aug. 1982, 7400’, CW & L O’Brien & G. Wibmer; 1 male and 1 female, [same as previous except 4 mi. W Patzcuaro]; 1 male, Mich., 8 mi. W Patzcuaro, 14 Aug. 1982, 7600’, CW & L O’Brien & G. Wibmer; 1 male, Mich., Hwy 15, 4 mi. W Zacapu, 8.Aug.1982, 7700’, CW & L O’Brien & G. Wibmer; 1 male, Sin. [Sinaloa], Hwy 40, 6.5 mi. E Potrerillos, viii-21-64, E. I. Schlinger; 1 male and 2 females, Mich., Hwy 15, 8 mi. NW Quiroga, 8 Aug. 1982, 7700’, CW & L O’Brien; 1 female, Mex. [Mexico], Hwy 55, 3 mi. N Atlacomulco, 28 July 1982, 8650’, CW & L O’Brien; 2 females, Mexico, Oax. Hwy. 175, 66 km, NE Oaxaca, 7800', 29 Aug. 1982, C & L O’Brien & G. Wibmer; 1 female, Mexico, Oaxaca, km 40, Guelatao-Oaxaca, 20-ix-1989, E Barrera ( CWOB). 1 male, Mex. [Mexico], 3 mi. W Tenancingo, vii-15-66, P.M. & P.K. Wagner; 1 female, Guanajuato, 3.6 mi. NE Guanajuato, July 6, 1985, Woolley & Zolnerowich; 1 female, [same as previous except July 5, 1985]; 1 female, Oaxaca, 10.8 km N Jct., 175/195, 19-vii-87, 1859 m – 87-28,30, Oak-Acacia woodland, R. Anderson; 2 males, Michoacan, Carapan, vii-1-63, J. Doyen collector; 1 male and 1 female, Michoacan, 6 mi. North Cheran, July 23, 1983, Kovarik, Harrison, Schaffner ( TAMU). 1 male and 1 female, Mexico, Oaxaca, 14 km NW Diaz Ordaz, 260 m, 15.vi.1979, H & A Howden; 1 male and 1 female, Oax., 12-13 km S Miahuatlan, 6.viii.1986, H & A. Howden; 1 male and 2 females, Mex. Oax., Cerezal, 36 km NE Oaxaca, 2300 m, 12.vi.1979, H & A Howden; 2 males and 1 female, [same as primary types]; 2 males, Mex., Oax., 10 km N San Juan del Estado, 7.viii.1986, H & A Howden; 1 male and 1 female, Mexico, Oaxaca, 22 km NE Oaxaca, 2600m, 18.vi.1979, H & A Howden; 1 male, Mex., Hwy 131, 70 km S Oaxaca, Rio de la Y, Km 20 W of jct., 215 km, 17.vi.1979, H & A Howden; 2 males and 2 females, Mex., Oax., 10.8 km N Jct. 175/195, 1859 m, 87-28, 30, 19.vii.87, R Anderson, Oak-Acacia woodland; 1 female, Mexico, Oaxaca, 11 km, NE Oaxaca, 1800 m, 27.vii.1992, RS Anderson, oak/acacia woodland, 92-035; 3 females [same as previous except 29.vii.1992, on Quercus sp. ] ( CMNC).

Description. Color and pubescence: Elytra bluish-black to bronzed with brassy luster, all other parts bluish-black; some specimens are bicolored with head and pronotum bluish-black and elytra with bronze metallic luster; pubescence of short fine reclinate brownish setae; ventrites and procoxae with longer whitish setae; ventrite four with long setal tufts each side of middle. Size: Male (n = 21) 2.7 × 1.0 mm to 3.1 × 1.3 mm; Female (n = 24) 2.4 × 1.0 mm to 3.5 × 1.5 mm. Head rectangular, longer than wide, moderately punctured, interspaces minutely granulose; granulations silky in appearance; frons slightly wider than rostral base; eyes large, oval, moderately protuberant. Rostrum long,.33 times longer than head, parallel-sided, moderately punctured, smooth and shiny at dorsal apex; basal 1/2 minutely granulose like interspaces of head, weakly arcuate, distinctly depressed apically. Antennae inserted at basal 1/3; scape and funicular segment 1 subequal, ovoglobose; funicular segments 2 and 3 subequal, longer than segment 1, narrow, weakly clavate; segments 4-6 subequal in length; segment 7 more robust; club segments subequal in length but different in shape; basal club segment widest at apex, narrowed to base; middle club segment subrectangular; apical segment widest at base, apically acuminate. Pronotum longer than wide, widest at basal 1/3, densely punctured; interspaces minutely granulose. Scutellum small, inconspicuous, about as long as wide, minutely punctured. Elytra elongate, more than twice as long as pronotum, slightly widened just behind middle; humeri simple; striae deeply impressed throughout, subquadrate; intervals narrow, weakly raised, with single row of setigerous punctures; interspaces between striae with single setigerous puncture. Thoracic pleura and sterna with coarse setose punctures; sterna bulbous. Abdominal ventrites moderately punctured, distinctly concave; sternite four with setal tuft each side of middle.

Distribution. Specimens were collected from the Mexican states of Sinaloa, Michoacan, Mexico, Guanajuato, and Oaxaca ( Fig. 93 ).

Comments. The adults of this species are recognized by the small, round, and widely spaced punctures of the head and the silky appearance of the minutely granulose interspaces. The pronotum and elytra are coarsely and densely punctured and the rostrum is relatively long and apically tapered and depressed (“needle-nosed”). Most specimens are bluish-black in color but some specimens are bicolored with the pronotum bluish-black and the elytra bronzed with a rosy and brassy luster. Males of this species and of T. potosi have a pair of long setal tufts on abdominal ventrite four. The aedeagus ( Fig. 80 ) is elongate and has a nearly parallel-sided median lobe that narrows only slightly into the sharply truncate pedon apex. The tectum is spearhead-shaped and elongate. The tegminal cap piece is narrowly finger-like with the knob-like pigmented apex bearing a cluster of numerous short setae. Endophallic bands are elongate, distinctly pigmented, parenthesis shaped at base.

Figures

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.