Temnocerus michoacensis, Hamilton, 2010

Hamilton, R. W., 2010, Central American Temnocerus Thunberg, 1815 (Coleoptera: Rhynchitidae), Insecta Mundi 2010 (128), pp. 1-42 : 24

Temnocerus michoacensis , new species

( Fig. 25, 26 , 70 , 90 )

Type locality. Mexico, Michoacan, 14.3 km S. Uruapan

Type depository. Canadian Museum of Nature ( CMNC)

Type specimens. Holotype male and allotype with the following data: Mexico, Mich. [Michoacan], 14.3 km. S. Uruapan , 29.vii.88, 1370- 1465 m, oak-acacia woodland, 88-10, R. S. Anderson ( CMNC) . Paratype data as follows: MEXICO: 1 male and 4 females with same data as primary types ; 1 female, Guer. [Guerrero], 10.7 km sw Xochipala, 5.vii.87, 1753m, 87-7, Oak-Acacia woodland, R. Anderson ; 1 female, Zac. [Zacatecas], 39.7 km. S. Juchipala , 6-viii-88, 1524 m, acacia-thorn scrub, 88-26, R. S. Anderson ( CMNC). 1 female, Oaxaca, 6 mi. NE Mitla, vi-20-1985, Woolley & Zolnerowich ; 1 female, Oaxaca, La Ventosa , 48 mi. E., vii- 21-63, J. Doyan collector ; 1 female, Guer., 10.7 km SW. Xochipala, 5-vii-87, 1753m, 87-7, Acacia /oak Woodland , R. Anderson ; 1 female, Michoacan, 49 mi. SE Aguila , July 13, 1984, 84/031, J. B. Woolley ; 1 female, Michoacan, 10.6 mi S Uruapan , July 24, 1983, Kovarik, Harrison, Schaffner ; 1 female, Jalisco, 6.1 mi. N Autlan, 7 mi W at San Francisco microwave tower, vii-31-1996, 4680’, W. Godwin ( TAMU) .

Description. Color and pubescence: Body blackish throughout; pronotum with brassy luster; elytra bluish-black with faint purplish luster. Pubescence inconspicuous; composed of short appressed brownish setae. Size: Male (n = 2) 2.2 × 0.8 mm to 2.7 × 1.2 mm; Female (n = 14) 2.1 × 0.8 mm to 3.0 × 1.3 mm. Head quadrate, punctures small, widely spaced; interspaces minutely granulose, frons wide,.50 times wider than rostral base; eyes strongly protuberant. Rostrum.25 times longer than head, coarsely punctured; sides subparallel in dorsal view, only slightly widened and depressed beyond antennal insertions. Antennae shorter than rostrum; inserted at basal 1/3 of rostrum; scape and funicular segment 1 ovoglobose, subequal in length; funicular segments 2-5 narrow, weakly clavate; segments 6-7 short, bead-like; club segments subequal in length; middle club segment slightly shorter; terminal segment broadly rounded. Pronotum slightly wider than long, widest just behind middle, densely punctured, interspaces minutely granulose. Scutellum small, subquadrate, minutely punctured. Elytra elongate, more than twice as long as pronotum, widest behind middle, humeri simple; strial punctures moderately impressed, distinct throughout; intervals flat, with row setigerous punctures along each side of striae. Thoracic pleura & sterna moderately punctured. Abdominal ventrites smooth, shiny, sparsely and minutely punctured.

Distribution. Adults have been taken in the Mexican states of Guerrero, Jalisco, Michoacan, Oaxaca, and Zacatecas ( Fig. 90 ).

Etymology. The specific epithet is derived from the Mexican state of Michoacan.

Comments. Temnocerus michoacensis is recognized by the wide brassy pronotum and the bluish-black elytra with a faint purplish luster. The aedeagus ( Fig.70 ) has a short wide median lobe with the pedon strongly tapered to a bluntly pointed apex. The tectum is broadly spearhead-shaped. The tegminal cap piece is wide, broadly rounded at the apex and with long widely spaced marginal setae. Endophallic bands are short and weakly defined.

Plant association. The primary types were taken in oak-acacia woodland but specific hosts are unknown.

Figures

Figure 23-34. Heads of Temnocerus species, frontal view, male left and female right. 23-24) T. mexicanus n.sp., holotype and allotype. 25-26) T. michoacensis n.sp., holotype and allotype. 27-28) T. minutus n.sp., holotype and allotype. 29-30) T. niger n.sp., holotype and allotype. 31-32) T. oaxacensis n.sp., holotype and allotype. 33-34) T. obrieni n.sp., holotype and allotype.

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 87-90. Distribution of Temnocerus species. 87) T. abdominalis, red; T. chiapensis, blue; T. chiriquensis, black; T. rostralis, green. 88) T. confertus, red; T. ellus, blue; T. giganteus, black. 89) T. guerrerensis, blue; T. guatemalenus, red; T. herediensis, black. 90) T. mexicanus, red; T. michoacensis, blue; T. minutus, black.