Amnestus carinatus, Martinez & Peredo, 2005

Amnestus carinatus new species

Figs. 1C View Fig , 2C View Fig , 3C View Fig , 4C View Fig , 5C View Fig , 6C View Fig

Description. ( Fig. 1 C View Fig ). Jugum with five spines; anterior half of head without punctures; prosternal carina elevated with a small grove on ventral margin, ( Fig. 2 C View Fig ); pronotum with lateral margins widely carinated. Head, prosternal carina, pronotum, and scutellum dark brown. Antennae, rostrum, marginal carina of pronotum, hemelytra, and legs pale yellow.

Head. Anterior half smooth; tylus longer than jugum; rostrum short reaching mesosternum, Thorax. Anterior half of pronotum slightly elevated, anterior and posterior border concave, anterolateral margins strongly carinate, base truncate, ( Fig. 1 C View Fig ), and posterior margin rounded. Propleura shiny and smooth; prosternal carina elevated with a small groove on ventral margin; mesopleura with evaporatorium extended, and a small groove on posterior margin and reaching posterior and lateral margins of pleura. Osteolar peritreme of metapleura elongate, slightly curved with a dark brown mesial line; posterior margin serrated with transverse rough surface ( Fig. 3 C View Fig ). Legs. Fore tibia flat with six robust spines on external margin and one on middle of apex ( Fig. 4 C View Fig ); femur with a bifid spine on ventral middle area; and a bifid spine near apex of internal margin ( Fig. 5 C View Fig ). Scutellum. Triangular, with regularly distributed punctures on disc. Hemelytra. Weakly punctured; basal margin toothed, clavus with three rows of punctures, apical margin entire; hemelytral membrane hyaline, and extending beyond apex of abdomen.

Abdomen. Shiny, ventrally convex, with short setae laterally.

Male genitalia. Paramere small, rounded with apex pointed and setigerous punctures arranged along middle area ( Fig. 6 C View Fig ).

Male measurements. (n = 6). Body length 3.7 ± 0.3; head length 0.65 ± 0.07; width across eyes 0.70 ± 0.03; interocular distance 0.37 ± 0.02; interocellar distance 0.20 ± 0.01; antennal segments: I 0.14 ± 0.01, II 0.04 ± 0, III 0.30 ± 0.02, IV 0.30 ± 0.02, V 0.32 ± 0.02; rostral segments: I 0.24 ± 0.02, II 0.30 ± 0.02, III 0.24 ± 0.01, IV 0.25 ± 0.05; pronotum length 1.21 ± 0.1; width across anterior margin 0.72 ± 0.05; width across humeral angles 1.7 ± 0.07; scutellum: length 0.81 ± 0.03, width 0.83 ± 0.1; fore femur 0.67 ± 0.02; fore tibia 0.74 ± 0.04; hind femur 1.0 ± 0.05; hind tibia 1.15 ± 0.05; hind tarsi: I 0.1 ± 0.02, II 0.04 ± 0.002, III 0.09 ± 0.01.

Female measurements. (n = 8) Body length 3.3 ± 0.3; head length 0.61 ± 0.01; width across eyes 0.67 ± 0.05; interocular distance 0.36 ± 0.01; interocellar distance 0.21 ± 0.01; antennal segments: I 0.12 ± 0.008, II 0.04 ± 0, III 0.28 ± 0.02, IV 0.25 ± 0.05, V 0.29 ± 0.04; rostral segments: I 0.23 ± 0.03, II 0.29 ± 0.02, III 0.24 ± 0.02, IV 0.25 ± 0.006; pronotum length 1.08 ± 0.1; width across anterior margin 0.69 ± 0.07; width across humeral angles 1.7 ± 0.1; scutellum: length 0.77 ± 0.1, width 0.79 ± 0.07; fore femur 0.58 ± 0.07; fore tibia 0.67 ± 0.07; hind femur 0.93 ± 0.1; hind tibia 1.0 ± 0.1; hind tarsi: I 0.08 ± 0.01, II 0.04 ± 0.01, III 0.1 ± 0.01.

Types. Holotype, male. MEXICO, Chiapas, Reserva del Ocote , 30 May 1995, E. Barrera, ( CNIN) . Paratypes: MEXICO, Chiapas: 5 males, 8 females, same data as holotype .

Etymology. Named for the wide carina on the anterolateral margin of pronotum.

Distribution. Mexico, Chiapas.

Discussion. Species distinguished by the wide carinate anterolateral margins of pronotum, with base of posterior margin truncate ( Fig. 1 C View Fig ); prosternal carina high with a mesial groove on ventral margin ( Fig. 2 C View Fig ); evaporitrum expanded, peritreme elongate, slightly curved with a dark brown mesial line, posterior margin with transverse rough surface. ( Fig. 3 C View Fig ). Parameres elongate with a series of setigerous punctures arrange in mesial lines ( Fig. 6 C View Fig ). Fore tibia wide, with six robust spines on outer margin, and a single spine on mesial apical region ( Fig. 4 C View Fig ). Fore femur with a bifid spine near apex of inner margin ( Fig. 5 C View Fig ).