Amnestus septemclavatus 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 : 426-427

Amnestus septemclavatus Mayorga and Cervantes n. sp.

( Figs. 3d , 4l , 5l , 6l , 7l , 8l )

Diagnosis. This species can be recognized from other species with four marginal pegs on tylus, by the presence of seven robust pegs on margin of juga, by the dense punctures on posterior half of the head and by the presence of deep punctures along the concave anterior margin of pronotum. Prosternal carina elevated medially ( Fig. 4l ).

Description. Head, pronotum, scutellum, clavus, corium and abdominal venter dark brown; antennal and rostral segments, margin of prosternal carina and legs pale brown.

Head. Anterior half without punctures; tylus with four pegs, longer than juga; antennal segment II very short; rostrum reaching anterior margin of metasternum. Thorax. Pronotum with anterior margin concave, anterior half convex with punctures mesially and dense punctures on the posterior lobe; anterolateral margins carinate with deep punctures; posterior margin wide and convex, straight laterally. Propleura shiny and smooth; prosternal carina medially elevated ( Fig. 4l ). Mesopleura flat, evaporatorium extending to the anterior and lateral margins of pleura. Metapleura flat, evaporatorium extended to the posterior and lateral margins of pleura, peritreme shiny and elongated with the posterior margin toothed and sparsely rugose ( Fig. 5l ). Legs. Fore tibiae with five robust spines on dorsal margin; fore femora with a bifid, mesial spine on its venter; hind femora with a simple spine near apex on dorsal margin, and a small spine near apex on ventral margin ( Fig. 6l ) Hind tibiae with basal half flattened and with a ventral spine near base ( Fig. 7l ). Scutellum. Triangular, with deep punctures on disc. Hemelytra, with uniformly distributed punctures; clavus with three rows of punctures; hemelytral membrane hyaline and surpassing apex of abdomen. Abdomen shiny, ventrally convex, covered by fine hairs along lateral margins.

Male Genitalia. Parameres, rounded and elongated apically; with setae on ventral margin ( Fig. 8l ).

Male Measurements (n=3). Body length 4.7 ± 0.3; head length 0.61 ± 0.03; width across eyes 0.98 ± 0.02; interocular distance 0.63 ± 0.07; interocellar distance0.3; antennal segments: I 0.25, II 0.1, III 0.5, IV 0.5, V 0.5; rostral segments: I 0.36 ± 0.04, II 0.5, III 0.55 ± 0.05, IV 0.53 ± 0.02; pronotum length 1.45 ± 0.05; width across anterior margin 0.98 ± 0.03; width across humeral angles 2.28 ± 0.02; scutellum: length 1.15 ± 0.1; width 1.18 ± 0.07; length of fore femora 0.88 ± 0.02; fore tibiae 1.0; fore tarsi: I 0.1, II 0.05, III 0.15; length of hind femora 1.2 ± 0.1; hind tibiae 1.3 ± 0.1; hind tarsi: I 0.1, II 0.05, III 0.15.

Female Measurements (n=5). Body length 4.3 ± 0.1; head length 0.60 ± 0.05; width across eyes 0.92 ± 0.03; interocular distance 0.6; interocellar distance 0.3; antennal segments: I 0.25 ± 0, II 0.1, III 0.5, IV 0.46 ± 0.04, V 0.5; rostral segments: I 0.35 ± 0.05, II 0.5, III 0.56 ± 0.04, IV 0.50 ± 0.05; pronotum length1.28 ± 0.07; width across anterior margin 1.0 ± 0.05; width across humeral angles 2.18 ± 0.07; scutellum: length 1.0; width 1.24 ± 0.03; length of fore femora 0.81 ± 0.06; tibiae anterior 0.96 ± 0.1; fore tarsi: I 0.1, II 0.05, III 0.15; length of hind femora 1.1 ± 0.09; length hind tibiae 1.33 ± 0.08; hind tarsi: I 0.1, II 0.05, III 0.15.

Holotype. Male. Mexico, Chiapas: Municipio Tapalapa, 12 km Al N de Coapilla, 13-III-1994, R.W. Jones ( CNIN). Paratypes. Municipio Tapalapa, 12 km Al N de Coapilla, 13-III-1994, R.W. Jones. 2 ♂, 5 ♀ ( CNIN, ECOSUR).

Distribution. Mexico, Chiapas.

Etymology. From the Latin septem = seven, and clavus = peg referring to the seven marginal pegs on juga.

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.