Amnestus sinuosus, Martinez & Peredo, 2005

Amnestus sinuosus new species

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

Description. ( Fig. 1 F View Fig ). Jugum with four spines, pronotum mesially smooth, anterior half with dark brown macules and with sparse setigerous punctures. Prosternal carina low, with sinuated margin and slightly elevated posteriorly ( Fig. 2 F View Fig ). Head, posterior half of pronotum, clavus, and corium pale brown, anterior half of pronotum, scutellum, and prosternal carina dark brown; antennal segments I–V, rostral segments, and legs pale yellow.

Head. Dorsal surface with punctures, tylus longer than jugum, rostrum reaching base of abdomen.

Thorax. Anterior margin of pronotum concave, delimited by a series of setigerous punctures, mesially trimmed, anterior half strongly elevated with dark brown macules, anterolateral margins slightly carinated. Propleura smooth, prosternal carina low with margin sinuated, slightly elevated posteriorly ( Fig. 2 F View Fig ) Mesopleura. Evaporatorium rough, covering half of pleura. Metapleura elevated, evaporatorium reaching middle of pleura, posterior margin toothed; peritreme elongate and curved apically ( Fig. 3 F View Fig ). Legs. Fore tibia flat with five spines on external margin, with median angulation ( Fig. 4 F View Fig ); internal and external margins of hind femur smooth, with one single spine near apex ( Fig. 5 F View Fig ). Scutellum. Triangular, disc with punctures uniformly distributed. Hemelytra. With fine punctures; clavus with three rows of setigerous punctures; hemelytral membrane hyaline slightly passing apex of abdomen.

Abdomen. Covered by fine setae on lateral areas, middle part without setae.

Male genitalia. Parameres large, apically elongated, with four setigerous punctures on central part. ( Fig. 6 F View Fig ).

Male measurements. (n = 10) Body length 2.6 ± 0.3; head length 0.39 ± 0.07; width across eyes 0.58 ± 0.07; interocular distance 0.31 ± 0.05; interocellar distance 0.16 ± 0, antennal segments: I 0.10 ± 0.02, II 0.04 ± 0, III 0.25 ± 0.02, IV 0.22 ± 0.03, V 0.25 ± 0; rostral segments: I 0.17 ± 0.04, II 0.25 ± 0, III 0.28 ± 0.02, IV 0.23 ± 0; pronotum length 0.82 ± 0.1; width across anterior margin 0.68 ± 0.05; width across humeral angles 1.2 ± 0.09; scutellum: length 0.57 ± 0.1, width 0.71 ± 0.04; length fore femur 0.44 ± 0.05; fore tibia 0.48 ± 0.04; fore tarsi: I 0.04 ± 0, II 0.06 ± 0, III 0.09 ± 0.

Female measurements. (n = 10) Body length 2.9 ± 0.2; head length 0.40 ± 0.04; width across eyes 0.64 ± 0; interocular distance 0.33 ± 0.07; interocellar distance 0.18 ± 0; antennal segments: I 0.11 ± 0, II 0.04 ± 0, III 0.24 ± 0.02, IV 0.23 ± 0.02, V 0.25 ± 0; rostral segments: I 0.20 ± 0, II 0.24 ± 0.02, III 0.31 ± 0.07, IV 0.23 ± 0; pronotum length 0.79 ± 0.05; width across anterior margin 0.69 ± 0.02; width across humeral angles 1.3 ± 0; scutellum length 0.63 ± 0.05; width 0.70 ± 0.04; length fore femur 0.44 ± 003, fore tibia 0.48 ± 0.02, fore tarsi: I 0.04 ± 0, II 0.06 ± 0, III 0.09 ± 0; hind femur 0.70 ±.08; hind tibia 0.77 ± 0.09; hind tarsi I 0.04 ± 0, II 0.04 ± 0 III 0.11 ± 0.

Types. Holotype, male: MEXICO, Veracruz, San Andres Tuxtla, Estacion de Biolog’a Los Tuxtlas , 31 July 1989, S. Zaragoza. ( CNIN) . Paratypes: MEXICO, Veracruz: 25 males, 28 females, same locality and date as holotype ( IEXA, NMNH; BMNH) .

Etymology. From the Latin sinuosus, for the sinuate lateral margin of pronotum.

Distribution. Mexico, Veracruz.

Discussion. This is the only species with four jugal spines, pronotum mesially smooth, prosternal carina low, margin sinuate and slightly elevated posteriorly ( Fig. 2 F View Fig ) Evaporatorium rough, peritreme elongate and slightly curved apically ( Fig. 3 F View Fig ), and fore tibia flat with five spines on external margin and angulate mesially ( Fig. 4 F View Fig ).