Omolabus sedatus (Sharp)

HAMILTON, ROBERT W., 2005, Omolabus Jekel in north and central America (Coleoptera: Attelabidae), Zootaxa 986 (1), pp. 1-60 : 48-49

Omolabus sedatus (Sharp)

( Figs. 6 , 17 , 57, 58, 59 & 60) Attelabus sedatus Sharp 1889: 8

Xestolabus sedatus (Sharp) O’Brien & Wibmer 1982: 13

Type locality. Jalapa, Mexico (Lectotype)

Type data. Three syntypes (2 males and 1 female) with the following labels were examined: 1) [point mounted], Attelabus sedatus , male, Type, D.S., Jalapa, Mexico Hoge [on card below specimen]; Type [circular label with red margin]; Jalapa. Mexico Hoege; B.C.A. Col IV.3., Attelabus sedatus Sharp ; Sharp Coll 1905­313 [upside down]. 2) [male, card mounted], Attelabus sedatus D. S. Oaxaca, Mexico. Hoge [on card with specimen]; Oaxaca. Mexico. Hoege; B.C.A. Col. IV. 3. Attelabus sedatus Sharp ; Sharp Coll. 1905­313 [upside down]. 3) [specimen on point tip glued to card], Attelabus sedatus , female, Type D. S., Toxpam. Mexico. Salle; Type [circular label with red margin]; Toxpam Mexico, Salle Coll., B.C.A. Co. IV.3. Attelabus sedatus Sharp ; Sharp Coll. 1905­313 [upside down].The male from Jalapa is here designated as lectotype and the female from Toxpam as allolectotype.

Type holder. British Museum of Natural History ( BMNH).

Size range. Male: 3.2 x 1.6 mm to 4.6 x 2.3; Female: 3.1 x 1.5 mm to 4.4 x 2.3 mm.

Description. Body dark reddish­brown throughout. Head longer than wide, with some very small punctures on vertex and near eyes; frons with wide median sulcus; vertex weakly convex; eyes reniform, weakly protuberant. Rostrum slightly shorter than head, laterally punctate, dorsally beyond antennal insertion with very small widely spaced shallow punctures; apex about twice as wide as frons; postlabial area with pair of acute divergent denticles in male. Antennae inserted near basal 1/4 of rostrum; club elongatecompact, distinctly shorter than funicle; middle and terminal segments nearly subequal; basal segment slightly longer; funicular segment 1 ovo­globose, subequal to scape; segment 2 clavate, distinctly shorter than 1; 3 and 4 like 2 but slightly longer; 5 short, weakly clavate; 6 and 7 short, more or less moniliform. Pronotum smooth, shiny, with very minute widely spaced shallow punctures; anterior collar weakly defined, widened dorsally. Scutellum 1/3 wider than long, 5­sided, posterior margin with distinct angle at middle, with some very small shallow punctures. Elytra slightly wider than long, in dorsal view only slightly narrowed posteriorly, without transverse depression behind scutellum; humeri simple, rounded, moderately protuberant; striae small, round, more deeply impressed at base of elytra, becoming progressively less distinct posteriorly; intervals at base of elytra weakly convex; intervals beyond middle of elytra flat, smooth, wide. Profemora evenly swollen and distinctly stalked in male; ventrally angulate in female.

Distribution ( Fig. 6 ). Specimens of O. sedatus were examined from Mexico, Guatemala and Honduras.

Comments. Omolabus sedatus is a small reddish­brown species with simple humeri (Figs. 57–60). The males have a pair of acute postlabial denticles and the females have ventrally angulate profemora.

Host plants. This species is associated with Eugenia spp. ( Myrtaceae ).

Specimen data: 114 specimens were examined. The sex and label data are as follows:

GUATEMALA: 13 males & 2 females, Puente Lobo, 1980, Eugenia, G Vogt ; 6 males & 1 female, Pto­Barrios­Puente Lobos, 1980, Eugenia, G Vogt ; 5 males & 2 females, Pto. Barrios, Km 175 [Puente El Lobo], 1979, guava, G Vogt; 1 male, Km 241 [Puerto Barrios], viii­1980, G Vogt; 1 male, Km 175 [Puerto Barrios], xi­1979, G. Vogt (USNM).

HONDURAS: 1 female, 110 mi up Patuca Rio, 4­v­1947, CW Cook (CASC).

MEXICO:; 4 males & 2 female, S. L. P. [San Luis Potosi], El Naranjo, 3.7 miles West, 12­vii­1973, Guamer & Clark; 1 male, San Luis Potosi, 6 mi N Tamazunchala, 18­ viii­1959, RF Smith Collector; 1 male & 1 female, Chiapas, 4 mi NW Ocosingo, 9­iii­1953 (UCBC); 1 male, Oaxaca, Tuxtepec, 8 mi SW 200', 26­vi­1983, trop. lowland for., R Anderson; 1 male & 1 female, Oaxaca, 13 km S Tuxtepec, 60m, 26­vi­1983, M Kaulbars (CMNC); 13 males & 5 females, Oaxaca, Piedra Blanca, vii­1969, Eugenia, G Vogt ; 3 males & 4 females, Oaxaca, Matias Romero, vii­1969, Eugenia, G Vogt ; 1 female, [ Mexico], [Oaxaca], S. of Matias Romero, 24­vii­1979, Eugenia, G Vogt ; 1 female, Veracruz, Tecolutla, viii­1982, Eugenia, G Vogt ; 1 female, Mexico, [Chiapas], Finca Agua Clara, 13­ viii­1982, G Vogt; 1 female, Quintana Roo, Cozumel­San Miguel, 1­vii­1959, NLH Krauss; 4 females, [ Mexico], Tabasco, Jalapa, 14­viii­1982, G Vogt (USNM); 1 male, Veracruz, 1 mi W Papantla, 28­vi­1971, Clark, Murray, Hart, Schaffner; 1 male & 1 female, Veracruz, 7.3 mi E Naranjos, 20­ix­1976, WE Clark; 1 female, Veracruz, Catemaco, 11­iv­ 1967, H R Burke; 2 female, Veracruz, 27­ix­1976, WE Clark; 2 females, Tamaulipas, Rio Sabinas Rancho Cielito, 14–15 iv­1984, JA Jackman; 1 male & 1 female, S. L. P. [San Luis Potosi], Huichihuayan, 8­viii­1967, HR Burke & J Hafernik (TAMC); 1 male, Tamaulipas, Res. Biosfera El Cielo, MPIO: Llera de Canales, Ejido El Pinon S. Nino 100 msnm [?], 26­v­1998, J Hernandez; 1 male [same except 29­viii­1998]; 1 male, Veracruz, 10 mi W Poza Rica, 11­vii­1955, D Giuliani (CASC); 1 male, [Veracruz], Lake Catemaco, 24– 25 v­1969, H Howden (CMNC); 1 male & 2 females, Ver. [Veracruz], Cordoba, A Fenyes (CASC); 6 males & 3 females, Veracruz, vic. of El Salto de Eyipantia 15 km S San Andres Tuxtla, 15–28 vi­1985, Askevold & Heffern; 1 male & 2 female, Quintana Roo, Cozumel Island, 24­vi­1970, BK Dozier; 1 male & 2 females, Chiapas, 21.3 km N Ocozocoautla, 7­ ix­1981, Clark & Coe; 1 female, [Veracruz], San Fernando, [Soteapan?] Santa Marta mtns., 20­vi­1992, Liquidambar Forest, Mateu; 2 female, Yuc.[Yucatan], 6 km W Valladolid, 2­viii­1990, CW & LB O’Brien; 1 female, Tamaulipas, Rancho Cielito, 4 km W Encino, 24–25 iii­1980, EG Riley; 1 female, Veracruz, 7 mi SE Poza Rica, 25­x­1979, R Turnbow (CWOB).

Figures

FIGURES 1 – 8. Distribution of Omolabus species: 1) Omolabus veracruensis (square), Omolabus spinipectus (circle), Omolabus megalomus (triangle), Omolabus fasciventris (open triangle) 2) Omolabus ligulatus (circle), Omolabus quadratus (open triangle) 3) Omolabus heterocerus (triangle), Omolabus angulipennis (circle) 4) Omolabus laesicollis 5) Omolabus corvinus 6) Omolabus sedatus (circle), Omolabus longiclava (triangle) 7) Omolabus callosus 8) Omolabus conicollis.

FIGURES 15 – 19. Male genitalia of Omolabus species, 64 X: a) tegmen, dorsal view b) median lobe with endophallic sac and transfer apparatus in repose, ventral view 15) Omolabus heterocerus, Mexico, Guerrero 16) Omolabus fasciventris, Panama, Canal Zone 17) Omolabus sedatus, Guatemala, Puente El Lobo­Puerto Barrios 18) Omolabus callosus, Tela­Leon Valley 19) Omolabus veracruensis, Mexico, Veracruz.