Amnestus rugosus, Martinez & Peredo, 2005

Amnestus rugosus new species

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

Description. ( Fig. 1 E View Fig ). Tylus and jugum transversely wrinkled, anterior margin without punctures, lateral margin of pronotum toothed, with a wide marginal carina uniformly punctate, prosternal carina high with ventral margin straight ( Fig. 2 E View Fig ). Head, antennal segments, pronotum, scutellum, hemelytra, and abdomen dark brown, marginal carina of pronotum, legs, and rostrum pale brown.

Head. Basal three quarters with dense punctures, apical margin of tylus, and jugum smooth; prosternal carina slightly passing rostral segment II.

Thorax. Pronotum wide, with anterior margin concave, dorsally elevated with dense punctures, anterolateral margins toothed and carinate. Propleura dark shiny brown; prosternal carina with straight margin ( Fig. 2 E View Fig ). Mesopleura with evaporatorium expanded towards anterolateral and posterior margins of pleura; metapleura flat, evaporatorium reaching middle part of pleura, posterior margin toothed and with a series of setigerous punctures; peritreme elongate, with dark brown base; posterior margin of evaporatorium reaching base of pleura, middle region with well-defined wrinkles ( Fig. 3 E View Fig ). Legs. Fore tibia flat with five spines on external margin ( Fig. 4 E View Fig ); hind femur thin, with bifid spine on anterior half on ventral surface, external margin of hind femur smooth and internal margin serrate, with a small spine near apex on ventral surface ( Fig. 5 E View Fig ). Scutellum. Triangular with dense setigerous punctures. Hemelytra. Corium with uniformly distributed punctures; clavus with three longitudinal rows of punctures; hemelytral membrane hyaline and passing apex of abdomen.

Abdomen Ventrally convex with a few sparse setae. Male genitalia. Parameres large, half-moon shaped, with two setigerous punctures on middle area ( Fig. 6 E View Fig ).

Male measurements (n = 10). Body length 2.30 ±.3; head length 0.32 ± 0; width across eyes 0.50 ± 0.04; interocular distance 0.32 ± 0; interocellar distance 0.13 ± 0.03; antennal segments: I 0.16 ± 0, II 0.04 ± 0, III 0.23 ± 0, IV 0.22 ± 0.05, V 0.25 ± 0.02; rostral segments: I 0.13 ± 0, II 0.21 ± 0.03, III 0.25 ± 0, IV 0.23 ± 0; pronotum length 0.73 ± 0.1; width across anterior margin 0.54 ± 0.05; width across humeral angles 1.28 ± 0.07; scutellum: length 0.60 ± 0.03, width 0.70 ± 0.04; length fore femur 0.42 ± 0.04; fore tibia 0.46 ± 0.03; fore tarsi: I 0.04 ± 0, II 0.04 ± 0.02, II 0.09 ± 0; hind femur 0.56 ± 0.04, hind tibia 0.66 ± 0.07; hind tarsi: I 0.04 ± 0, II 0.04 ± 0, III 0.06 ± 0.03.

Female measurements. (n = 10) Body length 2.45 ± 0.4; head length 0.31 ± 0.05; width across eyes 0.51 ± 0.02; interocular distance 0.32 ± 0.02; interocellar distance 0.14 ± 0.02; antennal segments: I 0.12 ±.02, II 0.04 ± 0, III 0.21 ± 0.03, IV 0.21 ± 0.03, V 0.26 ± 0.02; rostral segments: I 0.13 ± 0, II 0.21 ± 0.03, III 0.26 ± 0.02, IV 0.23 ± 0; pronotum length 0.75 ± 0.09; width across anterior margin 0.56 ± 0.02; width across humeral angles 1.32 ± 0.1; scutellum: length 0.59 ±.09, width 0.71 ± 0.04; length fore femur 0.43 ± 0; fore tibia 0.46 ±; fore tarsi: I 0.04 ±, II 0.04 ± 0, III 0.06 ± 0; hind femur 0.58 ± 0.05; hind tibia 0.68 ± 0.09; hind tarsi: I 0.04 ± 0, II 0.04 ± 0, III 0.06 ± 0.

Types. Holotype, male: MEXICO, Chiapas, Tenejapa, Paraje Yashanal , 20 August 1991, R.W.Jones- D.Bravo ( CNIN) . Paratypes: MEXICO, Chiapas: 10 males, 5 females, same data as holotype ( CNIN, IEXA) ; 5 males, 9 females, Tenejapa, Ojo de Yashanal , 4 March 1994, R.Gomez R.W. Jones ( CNIN, IEXA) .

Etymology. From Latin rugosus = wrinkled, after the wrinkled surface of tylus and jugum.

Distribution. Mexico, Chiapas.

Discussion. This species differs from others by the wrinkled surface of tylus and jugum, prosternal carina high with straight margin ( Fig. 2 E View Fig ); evaporatorium expanded onto anterolateral and posterior margins of pleura, peritreme elongated, with a dark area on its base and a rough surface near the middle region ( Fig. 3 E View Fig ); parameres large, half-moon shaped, with two setigerous punctures on middle part ( Fig. 6 E View Fig ); fore tibia with five spines on external margin ( Fig. 4 E View Fig ); and hind femur with external margin smooth, internal margin serrate with a small spine near apex ( Fig. 5 E View Fig ).