Amnestus cristobalensis Mayorga and Cervantes

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 : 408-409

Amnestus cristobalensis Mayorga and Cervantes n. sp.

( Figs. 1d , 4d , 5d , 6d , 7d , 8d )

Diagnosis. Juga with five pegs; anterior half of head without punctures; ocelli small, near base of head; pronotum strongly convex with dense punctures on all surfaces, lateral margins explanate and denticulate ( Fig. 1d ); prosternal carina low with ventral margin entire ( Fig. 4d ).

Description. Posterior part of head, antennal segment III, prosternal carina, pronotum, scutellum, and abdomen dark brown. Antennal segments I, II, IV, and V, rostral segments, and legs castaneous.

Head. Anterior half with punctures along margins and on callus; posterior half with dense punctures; tylus with four pegs and just slightly longer than juga; juga with five marginal pegs; rostrum surpassing metasternum. Pronotum with anterior margin concave; anterior and posterior lobes with dense punctures; lateral margins carinate with dense punctures; posterior margin convex. Propleura shiny and smooth; prosternal carina low ( Fig. 4d ). Mesopleura flat, evaporatorium reaching anterior and lateral margins of pleura. Metapleura with evaporatorium reaching posterior and lateral margins of pleura, peritreme shiny, elongated and curved apically ( Fig. 5d ) Legs. Fore femora with a bifid, mesial spine and a small spine near apex on ventral margin; fore tibiae with seven spines on dorsal margin ( Fig. 6d ); hind femora with a small spine near apex on dorsal margin, and a simple spine near apex on ventral margin ( Fig. 7d ) Scutellum. Triangular with acute apex and deep punctures on disc. Hemelytra. Corium with uniformly distributed punctures; clavus with three rows of punctures; membrane hyaline and surpassing apex of abdomen. Abdomen shiny, ventrally convex with fine hairs on its entire surface.

Male Genitalia. Parameres curved externally, and elongated apically with setigerous punctures near apex ( Fig. 8d ).

Male measurements (n=3). Body length 4.7 ± 0.2; head length 0.57 ± 0.01; width across eyes 0.87 ± 0.02; interocular distance 0.50; interocellar distance 0.30; antennal segments I 0.25, II 0.05, III 0.32 ± 0.02, IV 0.42 ± 0.02, V 0.52 ± 0.02; rostral segments, I 0.35, II 0.45, III 0.55, IV 0.30; pronotum length 1.6 ± 0.02; width across anterior margin 1.0 ± 0.01; width across humeral angles 2.6 ± 0.2; scutellum: length 1.1 ± 0.05; width 1.4 ± 0.1; length of fore femora 0.80 ± 0.05; fore tibiae 0.87 ± 0.4; fore tarsi I 0.10, II 0.05, III 0.15; length of hind femora 1.25; hind tibiae 1.4 ± 0.1; hind tarsi I 0.05, II 0.100, III 0.15.

Female measurements (n=1). Body length 4.5; head length 0.55, width across eyes 0.9, interocular distance 0.60; interocellar distance 0.35; antennal segments I 0.3, II 0.05, III 0.4, IV 0.45, V 0.5; rostral segments: I 0.35, II 0.5, III 0.55, IV 0.3; pronotum length 1.5; width across anterior margin 1.0; width across humeral angles 2.5; scutellum: length 1.0, width 1.3; length of fore femora 0.9: fore tibiae 0.85; fore tarsi: I 0.1, II 0.05, III 0.15; length of hind femora 1.2; hind tibiae 1.3; hind tarsi: I 0.1, II 0.05, III 0.15.

Holotype Male. Mexico Chiapas 15 km E San Cristobal 2500 m 29-V-2008, 16° 44' 48" N, 92° 29' 23" W, LLAMA Wm-A- 05-1-01 cloud forest ex sifted leaf litter, col. BD, IDMB, BB ( CNIN). Paratypes. 15 km E San Cristobal, 2500m, 29-V-2008, 16° 44' 48" N, 92° 29' 24" W, LLAMA Wa-A-05-1 all cloud forest ex sifted leaf litter, col. DB, IDMB, BB, 1♂ ( CNIN); 15 km E San Cristobal, 2500 m, 29-V-2008, 16° 44' 48" N, 92° 29' 23" W, LLAMA Wm-A- 05-1-01 cloud forest ex sifted leaf litter, col. BD, IDMB, BB, 1 ♂ ( ECOSUR). 15 km E San Cristobal 2500 m, 29-V-2008, 16° 44' 48" N, 92° 29' 23" W, LLAMA Wm-A 05-1-01 cloud forest ex sifted leaf litter, col. BD, IDMB, BB, 1 ♀ ( CNIN).

Distribution. Mexico, Chiapas

Etymology. Referring to the type locality, San Cristobal de las Casas.

Figures

FIGURES 1 A – D. Dorsal view of adults. a. A. bergrothi Distant, b. A. carinopilosus new species, c. A. chiapensis new species, d. A. cristobalensis new species (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.