Euscelus scrobiculatus Voss, 2007

Hamilton, Robert W., 2007, Euscelus species of the West Indies (Coleoptera: Attelabidae), Zootaxa 1495 (1), pp. 1-34 : 12-13

Euscelus scrobiculatus Voss

( Figs. 6 , 33–36)

Euscelus scrobiculatus Voss, 1925

Type locality: Dominican Republic

Type data: Holotype male with the following labels: 34324 [long, white, rectangular]; St. Domingo, Fayr. [hand written, pale green, long, rectangular]; Zool. Mus. Berlin [white, rectangular]; Euscelus scrobiculatus, Det. E. Voss n. sp. [handwritten I.D. label, rectangular].

Type holder: Museum fur Naturkunde, Humboldt University, Berlin, Germany ( ZMHB)

Specimen data: DOMINICAN REPUBLIC: 3 males, W. I., St. Domingo, Aug. ‘25, ex. sea grape, Coccoloba uviferae, GN Wolcott collection ( BMNH) . 1 male, Provincia Barahona, Paraiso , 3–xi-1986, WJ Pulawski ; 1 male, Puerto Plata, 10-v-1959 ( CASC) . 1 male, 4.5 km S Barahona, 22-v-1992, beating, MC Thomas ; 1 female, Dominican Republic , Barahona Prov., 4.5 km S Barahona, 17 May 1992, on Coccoloba uvifera Jacq., R Turnbow ; 2 males [same except 22 May]; 4 & 3 females, Punta Cana Reserva , 11–14.ix.2005, 18 o 30'40"N, 68 o 22'38"W, forest, L Masner YPT ( CMNC) . 4 males & 5 females, La Altagracia, Parque del Este Caseta Guaraguao , 4.4 km SE Bayahibe, 26–27 May 2004, 3 m, 18-19-59N, 68-48-42W, semi humid forest nr. sea, C Young, J Rawlins, C Fetzner, C Nunez ; 1 female [same as previous except 28 May 2004]; 1 female, Azua, East side of crest, Sierra Martin Garcia , 7 km WNW Barrero, 25–26 July 1992, 860 m, 18-21N, 70-58W, cloud forest next to disturbed forest, C Young, R Davidson , S Thompson, J Rawlins ; 1 male, La Vega, Constanza, Hotel MiCabana Resort , 19-20 Oct. 2002, 1070 m, 18-53N, 70-43W, fields and disturbed pastures, W Zanol, C Young, C Staresimic, J Rawlins ( CMNH) . 1 male, Barahona, 4.5 km S Barahona , 22 May 1992, R Turnbow ; 2 males & 2 females, Dom. Rep., Dis. Nac. , 2 km E Bocca Chica, July 31, 1979, GB Marshall ; 1 female [same as previous except CW O’Brien]; 1 female [same as previous except August 11, 1979, LB O’Brien]; 5 males & 4 females [same as previous except CW O’Brien], 3 males & 6 females [same as previous except GB Marshall]; 2 males, Dom. Rep. , Peravia, 13 km NW Bani, Aug. 8, 1979, on Coccoloba leoganensis, GB Marshall ; 1 male & 2 females [same as previous except Aug. 6, 1979, CW O’Brien; 2 males, Dom. Rep., Pto. Plata , 6 km W Puerto Plata, v-28-1978, CW & LB O’Brien & Marshall ; 2 males & 4 females, [two females with leaf roll]; San P. De Macoris, Playa Cumayasa , 8-26-1997, CW O’Brien ; 4 males & 3 females, S. Dom. , S. P. Macoris, March 7 & 8, 1914, EG Smyth coll. ; 2 males & 3 females, Dom. Rep., SPM , San Pedro de Macoris, May 30, 1978, on Coccolobus [sic], CW & LB O’Brien & Marshall ; 3 females, Peravia, 13 km NW Bani , August 8, 1979, on Coccoloba leoganensis, LB O’Brien ; 5 females [same as previous except August 12, 1979]; 2 females [same as previous except GB Marshall; 1 female, Rep. Dominicana, Bar. [Barahona], 8 km W Barahona, 8 July, 1985, WE Clark ; 1 female, Rep. Dominicana, D. F., Bocca Chica , 6 July, 1985, WE Clark ; 1 female, Dominican Republic , E St. Domingo, May 30, 1978, CW & LB O’Brien & Marshall ( CWOB) . 3 males & 1 female, R . D., seashore W of Ciudad Trujillo , 21-xii-1955, J Maldonado- Capiles ; 5 males & 3 females, W.I., St. Domingo , 25-viii, [one female with/on sea grape, Coccoloba uvifera , Santo Domingo City], GW Wolcott ; 1 female, Romana, R . D., 9[?]- iv-1913, WV Traver; 1 male, S. P. Macoris, R . D., viii-1972, Martorell, Burgos, Mejias ( USNM) . HAITI: 1 male, Morne a Cabrili [?], 26-ix- 1929, JG Meyers ( BMNH) . PUERTO RICO: 4 females, Santa Rita, vii-viii ( AMNH) .

Description: Color: Dark brown to reddish-brown throughout with faint metallic sheen; antennae, base of middle and hind femora, middle and hind tibiae and tarsi pale yellowish.

Size range: Male (n = 51) 5.1 x 2.0 mm to 6.9 x 2.5 mm; Female (n = 59) 5.2 x 2.1 mm to 6.4 x 2.6 mm. Head elongate, sub-rectangular, very slightly widened at base, very densely punctured; interspaces rugose, transversely strigate at base; frons wide, more than ½ as wide as rostral base; with rugosely punctured median concavity. Rostrum shorter than head, distinctly widened beyond antennal insertions; apex about ½ wider than rostral base; densely punctured. Antennae short, shorter than head and rostrum together; scape and funicle segment 1 ovo-globose; scape longer, more robust; funicle segments 2–4 more elongate, clavate; segments 5–7 shorter, bead like; club short; basal and middle segments subequal in length; basal segment more conical; terminal segment longer, acuminate. Pronotum wider than long, arched out above procoxae; interspaces transversely strigate and with numerous irregular punctures; disk with pair of deep pit like impressions each side of middle; with oval weakly raised strigate area at center of disk; postocular area with small denticle; postero-lateral corner with denticulate projection; anterior collar wide, band like, distinctly set off by deep line like groove; densely punctured and strigate; basal carinae, narrow, subequal through middle. Scutellum subtrapezoidal, at base about 1/3 wider than long, densely punctured; sides sinuate, posterior margin broadly rounded. Elytra longer than wide, slightly narrowed from humeri to apices; elytral suture distinctly separated for short distance just behind scutellum; strial punctures irregularly spaced within strial row; rows appearing broken or incomplete; some striae fused into short deep grooves near elytral base; intervals densely punctured, rugose; intervals 6 and 7 distinctly costate at lateral declivity; humeri simple; with distinct pointed triangular posthumeral projection. Abdominal ventrites moderately setose, moderately punctured; punctures more dense laterally.

Femoral sexual dimorphism: The profemur in males is armed with a single short pointed disti-ventral spine like projection. A narrowly oval setose sensillum is present in the mid-ventral area. The profemur of the female has a disti-ventral pointed spine like projection like that of the male.

Distribution: Most specimens examined were from the Dominican Republic. A single male specimen is recorded from Haiti and four females are recorded from Puerto Rico.

Comments: The dense punctuation of the head, the transversely rugose bifoveate pronotum and the pointed triangular posthumeral projections identify this species. The female lacks the postocular pronotal spine and the costate intervals at the elytral declivities.

Host plant: Label data associates this species with Coccoloba uvifera (Linn.) and Coccoloba leoganensis (Jacquin) .

Figures

FIGURES 5–8. Male genitalia of West Indies Euscelus species, 64 X: a) tegmen, dorsal view b) median lobe with endophallic sac and transfer apparatus in repose, ventral view 5) Euscelus angulosus, Cuba, Isle de Pinos 6) Euscelus scrobiculatus, Dominican Republic, South of Barahona 7) Euscelus uviferae, Haiti, Aux. Cayes 8) Euscelus biguttatus, Jamaica, St. Catherine Parish.