Temnnocerus obrieni, Hamilton, 2010

Hamilton, R. W., 2010, Central American Temnocerus Thunberg, 1815 (Coleoptera: Rhynchitidae), Insecta Mundi 2010 (128), pp. 1-42 : 27-28

Temnnocerus obrieni , new species

( Fig. 33, 34 , 74 , 91 )

Type locality. Mexico, Yucatan, 10 km E. Merida

Type depository. Charles W. O’Brien collection ( CWOB)

Type specimens. Holotype male and allotype with the following data: Mexico, Yuc. [Yucatan], 10 km E. Merida, vii-1-1990, CW & LB O’Brien ( CWOB) . Paratype data as follows: GUATEMALA: 1 male, Baja Verapaz, 14.5 km N Salama , 22.v.1991, 1620 m, dry oak/ pine woodland, 91-10, R Anderson ( CMNC). MEXICO: 1 male, Yuc., 45 km SW. Merida, vii-30-1990, CW & LB O’Brien ; 5 males and 15 females,

Yuc. , 10 km E. Merida, vii-1-1990, CW & LB O’Brien ; 1 male, Yuc., 9 km S. Valladolid , vii-28-1990, CW & LB O’Brien ; 1 male, Yucatan, Chichen Itza , 18-19-v-1987, collected at mercury vapor & black light, DA Rider, EG & T Riley ; 3 males, Jalisco, Puerto Vallarta , 25 Jan 1984, GE Bohart ; 1 male and 2 females, Camp. [Campeche], 7 mi E Campeche, Aug. 5, 1974, on Mimosa hemiendyta, CW & L O’Brien & Marshall ; 1 female, Camp., 6 mi N. Escarcega , Aug. 4, 1974, CW & L O’Brien & Marshall ; 1 female, Camp. , 22 mi NE Campeche, Aug. 5, 1974 ; CW & L O’Brien & Marshall; 1 male and 1 female, Nayarit, Is. [ Island] Maria Madre , rd Balleto – La Antena , 26-3-1984, Bromeliads in trees, 380 m, AN Garcia Aldrete ; 1 male, Nayarit, Is. Maria Madre, rd Balleto – La Antena , 26-3-1984, beating dry branches, AN Garcia Aldrete ; 1 male and 1 female, Nay. [Nayarit], S Rosamorada, viii-26-63, CD Johnson ( CWOB). 1 male, Yucatan, 3 km E. Chichen Itza , 20-vii-1983, 30 m, dry tropical seasonal forest, RS Anderson ; 1 male, Chis [Chiapas], El Rincon, Rt. 17, vi-13-14-1969, HF Howden ; 1 male, Tamaulipas, Nacimiento del Rio Frio, 5 mi S Gomez Farias, 5-6.vi.83, 400’, tropical decide.[deciduous] forest, R Anderson ; 1 female, Yucatan, Uxmal Ruins , 21-vii-1983, roadside sweep, RS Anderson ( CMNC). 1 male, Mexico, Chiapas, 27 km SW Teopisca, 18 Sept. 1981, Clark and Coe ; 1 male, Mexico, Puebla, 5.8 mi. SW Tehuacan , July 27, 1974, Clark, Murray, Ashe, Schaffner ( TAMU) .

Description. Color and pubescence: Body black to brownish-black. Pronotum with a faint greenish luster. Pubescence of fine short brownish to whitish appressed setae. Size: Male (n= 20) 1.6 × 0.6 mm to 1.9 × 0.7 mm; Female (n= 23) 1.6 × 0.7 mm to 2.1 × 0.9 mm. Head subquadrate, about as wide as long, moderately punctured, interspaces minutely granulose, shiny; frons wide, almost twice as wide as rostral base; eyes strongly protuberant, conical. Rostrum short nearly parallel-sided in dorsal view, slightly widened in apical 1/3; with scattered punctures; dorsal 1/3 smooth, shiny. Antennae inserted near basal 1/3; scape and funicular segment 1 subequal, ovoglobose; funicular segments 2-4 subequal, narrow, weakly clavate; segments 5 and 6 shorter bead like; basal and middle club segments subequal in length; basal segment widest across apical edge; middle subrectangular, wider that long; apical club segment slightly longer than basal and middle segments, apically acuminate. Pronotum slightly longer than wide, widest just behind middle; densely punctured, interspaces narrow, minutely granulose. Scutellum small, subquadrate, punctured. Elytra about twice as long as pronotum, widest just behind middle; humeri simple; striae quadrate, not deeply impressed, becoming smaller posteriorly; intervals narrow, not distinctly raised, with single row setigerous punctures, strial interspaces with single setigerous puncture. Thoracic pleura and sterna with coarse setigerous punctures; Abdominal ventrites weakly concave, with distinct median longitudinal channel on ventrites 1-3; raised sides of channel line like.

Distribution. Specimens are recorded from Guatemala and the Mexican states of Campeche Chiapas, Jalisco, Nayarit, Puebla, Tamaulipas and Yucatan ( Fig. 91 ).

Etymology. The specific epithet is in honor of weevil taxonomist Charles W. O’Brien.

Comments. The adults of this species are small and brownish black. Males have a distinct median longitudinal channel on the first three abdominal ventrites. The channel is delimited on each side by a narrow line-like carina. Males of Temnocerus aeratoides (Fall) of western North America also have this type of channel. The aedeagus ( Fig.74 ) has the short median lobe tapered apically to the narrowly rounded pedon apex. The tectum is narrow and spearhead-shaped. The tegminal cap piece is finger-like with the knob-like pigmented apex bearing a cluster of very short setae. Endophallic bands are short and weakly defined.

Plant association. Specimens are recorded as taken from Mimosa hemiendyta (Fabaceae) in Campeche, Mexico.

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 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.