Ateralphus lacteus Galileo & Martins, 2006

Souza, Diego De S. & Monné, Marcela L., 2013, Revision of the genus Ateralphus Restello, Iannuzzi & Marinoni, 2001 (Coleoptera: Cerambycidae: Lamiinae), Zootaxa 3736 (4), pp. 301-337 : 306-308

Ateralphus lacteus Galileo & Martins, 2006

( Figs. 2–7 ; 20–21; 29–30; 128)

Ateralphus lacteus Galileo & Martins, 2006a: 28 ; Wappes et al., 2007: 35 (dist.); Wappes et al., 2009: 2 (holot.); Monné & Bezark, 2009: 219 (check, dist.); Monné & Bezark, 2010: 222 (check, dist.); Monné & Bezark, 2011: 228 (check, dist.); Bezark & Monné, 2013: 235 (check, dist.).

Male. Integument dark brown. Body covered with dense and short yellowish-white setae. Frons rectangular; slightly convex, almost flat in lateral view. Upper ocular lobes height almost 2.5 times smaller than lower ocular lobe; distance between them three times width of lobe. Lower ocular lobe height slightly smaller than malar area. Genae parallel.

Antennae ( Fig. 29 ) reaching elytral apex approximately at antennomere VII. Scape covered with sparse yellowish-white setae interspersed by contrasting dots. Pedicel covered with uniform coloring setae. Antennomeres III–XI with one ring of dark brown setae on apical region, gradually longer on distal antennomeres.

Prothorax almost 1.5 times wider than long; covered with short setae, yellowish-white; anterior margin almost one sixth narrower than posterior margin. Pronotum with a slight median longitudinal elevation which starts near anterior margin and ends at median tubercle; with three tubercles on disc: two median elevated, obtuse and glabrous apex; with the third tubercle on midline, situated posterior to median tubercles, smaller and with glabrous apex. Prosternal process width almost one third the diameter of one procoxa. Mesosternal process flat at posterior half and anterior margin decline at an angle of approximately 45° relative to mesosternum. Mesepisternum, mesepimeron and metepisternum covered with yellowish-white setae.

Scutellum wider than long, subtriangular with apex truncate and sinuous apical margin; with one median longitudinal depression; finely punctate, covered with short and dense yellowish-white setae.

Elytra length about four times longer than prothorax; covered with rather yellowish-gray to golden setae, with three maculae of well-defined white setae: one on center of dorsum, starting at basal-crests; and, on each side, another macula posterolaterally to central macula, but less than it; with irregular patches of white setae on anteapical region and extremities. Basal-crest adorned by irregular tubercules; without stains of dark brown setae. Epipleura setae coloration similar to dorsum. Apical margin of elytra ( Fig. 20 ) with a slight spine in external apical angle.

Legs entirely covered with yellowish-white setae. Tibiae with one spot of dark brown setae on subapical region. Tarsomere V bicolorous, base with yellowish-white setae and apex dark brown.

Abdomen ( Fig. 21 ) entirely covered with yellowish-white setae, dense and uniformly distributed. Sternite V wider than long; length about equal or less than length of sternite III and IV together.

Terminalia. Median lobe ( Figs. 2–3 ) slightly curved in lateral view; dorsal and ventral lobes subequal in length, with truncate apex; basal apophysis length about 1.5 times less than apical portion. Tegmen ( Fig. 4 ) as long as median lobe; parameres about 3.5 times less than tegmen length, near each other; in inner surface, with long and sparse setae and a row setae on apical half; ring piece with apical projection curved and apical margin slightly sinuous and pointed.

Female. Antennae ( Fig. 30 ) reaching elytral apex approximately at antennomeres VIII–XI. Elytra with a “V”- shaped stain of dark brown setae starting from basal-crests.

Terminalia ( Figs. 5–7 ). Sternite VIII ( Fig. 5 ) rounded, parallel near apex; sternal apodeme length about 2.5 times longer than sternite VIII. Tergal apodemes concave, with a furrowed depression in the center and narrowing towards basal region. Coxites ( Fig. 7 ) parallel, robust and curved; near each other; basal region approximately 2–3 times wider than apex. Bursa copulatrix small and rounded shape. Spermathecal duct long. Spermatheca base elongate, gradually wider towards apical region and apex rounded. Spermathecal gland short, length about two times longer than spermatheca.

Variability. The “V”-shaped stain of dark brown setae on elytra may be well-defined or like one discrete spot near elytral suture ( Figs. 29–30 ).

Measurements (mm), male/female. Total length, 9.0/10.3–11.4; prothorax length, 1.6/1.8–2.2; prothorax maximum width, 3.0/3.4–3.8; elytral length, 6.6/7.7–8.3; humeral width, 3.6/4.2–4.7.

Type-material. Holotype, Ateralphus lacteus , female, Buena Vista, Santa Cruz, Bolivia (MNKM) (examined by photograph).

Discussion. Ateralphus lacteus resembles A. variegatus and A. tumidus new species by the general appearance of the body. This species may be differentiated by the coloration pattern of the dorsal setae described in the key, the inconspicuous punctation and carinae on elytra and the coating of ventral surface of abdomen, which in A. lacteus is completely covered by setae ( Fig. 21 ), while A. variegatus and A. tumidus new species have glabrous areas on lateral margins of sternites II–V ( Fig. 24 ).

Geographical distribution. Bolivia (Santa Cruz). New state records are added from Venezuela (Distrito Capital), Bolivia (Cochabamba) and Brazil (Amazonas and Mato Grosso) ( Fig. 128 ).

Material examined. VENEZUELA, Distrito Capital: Caracas, 1 female, VIII.1957, R. Lichy leg. (MNRJ). BRAZIL, Amazonas: Borba (Guajará), 1 female, VIII.1943, A. Parko leg. (MNRJ); Mato Grosso: Rosário Oeste, 1 female, X.1960 (MNRJ). BOLIVIA, Cochabamba: Chapare, 1 male, 20.X.1948, H. Zellibor leg. (MNRJ).

Figures

FIGURE 128. Distribution map for Ateralphus lacteus Galileo & Martins, 2006, Ateralphus variegatus (Mendes, 1938) and Ateralphus tumidus new species.

FIGURES 2 – 7. Ateralphus lacteus Galileo & Martins, 2006. Male: 2 – 3, median lobe, dorsal and lateral view; 4, tegmen. Female: 5, sternite VIII; 6, female terminalia; 7, coxites. Scales = 1 mm. Figures 2 – 4, 5 – 6, respectively, same scale.

FIGURES 29 – 34. 29 – 30, Ateralphus lacteus Galileo & Martins, 2006: 29, male; 30, female. 31 – 32. Ateralphus variegatus (Mendes, 1938): 31, male; 32, female. 33 – 34, Ateralphus tumidus new species: 33, holotype, female; 34, paratype, male. Scales = 2 mm.

FIGURES 20 – 28. 20 – 21, Ateralphus lacteus Galileo & Martins, 2006: 20, male, elytral apex; 21, female, abdomen, ventral view. 22 – 25, Ateralphus variegatus (Mendes, 1938): 22, frons; 23, basal-crests and punctation on prothorax and elytra; 24, female, abdomen, ventral view; 25, protibia. 26 – 28, Ateralphus tumidus new species: 26 – 27, mesosternal process, ventral and lateral view; 28, tarsômero V. Scales = 1 mm.