Amnestus stali Distant

Martinez, Cristina Mayorga & Peredo, Luis Cervantes, 2014, The genus Amnestus Dallas (Hemiptera: Heteroptera: Cydnidae: Amnestinae) in Mexico, with the description of eleven new species from Chiapas, Zootaxa 3779 (4), pp. 401-432 : 428-429

Amnestus stali Distant

( Figs. 3e , 4m , 5m , 6m , 7m , 8m )

Amnestus stali Distant, 1893 , p. 454

Diagnosis. Juga with five pegs, disc of anterior pronotal lobe elevated with sparse setigerous punctures, prosternal carina low with ventral margin straight ( Fig. 4m ).

Description. Head, antennal segment III, pronotum, prosternal carina, abdominal venter, scutellum, clavus, and corium dark brown. Antennal segments I, II, IV, and V, rostrum, marginal carina of pronotum, and legs pale brown.

Head. Anterior half smooth, posterior half with punctures in the interocellar and interocular areas; tylus with four pegs, surpassing juga, antennal segment II very short, V longest; rostrum reaching metasternum. Thorax. Pronotum with anterior margin concave, anterior half convex with sparse punctures; antero-lateral margins slightly carinate; posterior middle area with deep punctures. Propleura shiny and smooth; prosternal carina low and straight ( Fig. 4m ). Mesopleura flat, evaporatorium reaching anterior and lateral margins of pleura. Metapleura flat, evaporatorium reaching posterior and lateral margins of pleura, peritreme pale brown with a dark brown margin centrally, with apex slightly curved, posterior margin of evaporatorium toothed and with short hairs ( Fig. 5m ). Legs. Fore tibiae with six robust spines on dorsal margin with a series of hairs on ventral margin; fore femora with a bifid spine on the basal third on the ventral surface ( Fig. 6m ). Hind femora with ventral margin serrated and a simple spine near apex on ventral surface ( Fig. 7m ). Scutellum triangular, apex acute, disc with disperse punctures. Hemelytra. Disc without punctures, clavus with two rows of pale punctures, membrane hyaline, surpassing apex of abdomen. Abdomen. Ventrally convex with fine hairs.

Male genitalia. Parameres long, mesially expanded, and apically slightly concave and digitiform, with two setae apically ( Fig. 8m ).

Male measurements (n=2). Body length 3.5; head length 0.65; width across eyes 0.7; interocular distance 0.45; interocellar distance 0.25; antennal segments: I 0.15, II 0.05, III 0.25, IV 0.3, V 0.35; rostral segments: I 0.3, II 0.35, III 0.45, IV 0.25; pronotum length 1.0; width across anterior margin 0.8; width across humeral angles 1.65; scutellum: length 0.8; width 0.9; length of fore femora 0.5; fore tibiae 0.65; fore tarsi: I 0.1, II 0.05, III 0.15; length of hind femora 0.85; hind tibiae 0.9; hind tarsi I 0.1, II 0.05, III 0.15.

Type data. This species was described based on two females, each specimen mounted on one card. The one with the typical circled red type label bears also the labels: Quique Mts., 7–9000 ft. Champion; BCA., Hem 1, Amnestus stali Dist (type); so this specimen is designated as the Lectotype. The other specimen has the same labels, but also has a label: Distant Coll. 1911-383, and a yellow circled Paratype label; so this becomes a Paralectotype. New records. Mexico: Chiapas. Tapalapa, W de Tapalapa, 13-III-1994, O. Gomez, 2 ♂ ( CNIN).

Distribution. Mexico: Chiapas. Guatemala ( Froeschner, 1960: Mayorga & Cervantes, 2009).

Figures

FIGURES 3 A – E. Dorsal view of adults. a. A. marcelae new species, b. A. puncticarinatus new species, c. A. santiagensis new species, d. A. septemclavatus new species, e. A. stali Distant (scale = 1 mm).

FIGURES 4 A – M. Lateral view of head and prothorax, showing prosternal carina. a. A. bergrothi Distant, b. A. carinopilosus new species, c. A. chiapensis new species, d. A. cristobalensis new species, e. A. denticulatus new species, f. A. laevifemoralis new species, g. A. longinoi new species, h. A. lorenae new species, i. A. marcelae new species, j. A. puncticarinatus new species, k. A. santiagensis new species, l. A. septemclavatus new species, m. A. stali Distant.

FIGURES 5 A – M. External scent efferent system. a. A. bergrothi Distant, b. A. carinopilosus new species, c. A. chiapensis new species, d. A. cristobalensis new species, e. A. denticulatus new species, f. A. laevifemoralis new species, g. A. longinoi new species, h. A. lorenae new species, i. A. marcelae new species, j. A. puncticarinatus new species, k. A. santiagensis new species, l. A. septemclavatus new species, m. A. stali Distant.

FIGURES 6 A – O. Male fore leg, anterior view. a. A. bergrothi Distant, b. A. carinopilosus new species, c. A. chiapensis new species, d. A. cristobalensis new species, e. A. denticulatus new species, f. A. laevifemoralis new species, g. A. longinoi new species, h. A. lorenae new species, i. A. marcelae new species, j. A. puncticarinatus new species, k. A. santiagensis new species, l. A. septemclavatus new species, m. A. stali Distant, n. A. sinuosus, o. A. basidentatus.

FIGURES 7 A – Q. Male hind leg, posterior view. a. A. bergrothi Distant, b. A. carinopilosus new species, c. A. chiapensis new species, d. A. cristobalensis new species, e. A. denticulatus new species, f. A. laevifemoralis new species, g. A. longinoi new species, h. A. lorenae new species, i. A. marcelae new species, j. A. puncticarinatus new species, k. A. santiagensis new species, l. A. septemclavatus new species, m. A. stali Distant, n. A. sinuosus, o. A. brunneus, p. A. ficus, q. A. pusillus.

FIGURES 8 A – N. Lateral view of parameres. a. A. bergrothi Distant, b. A. carinopilosus new species, c. A. chiapensis new species, d. A. cristobalensis new species, e. A. denticulatus new species, f. A. laevifemoralis new species, g. A. longinoi new species, h. A. lorenae new species, i. A. marcelae new species, j. A. puncticarinatus new species, k. A. santiagensis new species, l. A. septemclavatus new species, m. A. stali Distant, n. A. forreri.