Amnestus denticulatus 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 : 409-410

Amnestus denticulatus Mayorga and Cervantes n. sp.

( Figs. 2a , 4e , 5e , 6e , 7e , 8e )

Diagnosis. Juga with five pegs, pronotum with anterior margin concave, followed by a series of deep punctures, posterolateral margin toothed ( Fig. 2a ); prosternal carina elevated with ventral margin semicircular ( Fig. 4e ).

Description. Head, antennal segments III, IV, and V, pronotum, prosternal carina, abdominal venter, ¾ of middle and hind femora, scutellum, peritreme, clavus and corium dark brown. Antennal segments I, II, rostrum, femora and all tarsi pale brown.

Head. Posterior half with punctures; tylus longer than juga; antennal segment II very short, and segment V longest; rostrum reaching base of metasternum. Thorax. Pronotum, anterior disc convex with disperse punctures, anterolateral margins denticulate, slightly carinate; posterior disc with dense punctures. Propleura shiny and smooth; prosternal carina semicircular ( Fig. 4e ). Mesopleura flat; evaporatorium extended towards anterior and lateral margins. Metapleura with evaporatorium reaching posterior and lateral margins; peritreme elongate and dull with apex slightly curved, posterior margin of evaporatorium entire ( Fig. 5e ). Legs. Fore tibiae with six spines on dorsal margin, fore femora with a bifid spine on basal third, with a small spine near apex on ventral surface ( Fig. 6e ). Ventral and dorsal margins of hind femora smooth, with two simple spines near apex, one on ventral margin and the other on dorsal margin ( Fig. 7e ). Scutellum triangular, with acute apex, scattered punctures on disc. Hemelytra, with uniformly distributed punctures on the lateral middle area. Clavus with three rows of punctures; membrane hyaline and surpassing apex of abdomen. Abdomen. Ventrally convex, covered with fine hairs.

Male genitalia. Parameres long, half moon shape, slightly lobed on middle area of ventral margin, with ten long setae ( Fig. 8e ).

Male measurements (n=1). Body length 3.6; head length 0.45; width across eyes 0.7; interocular distance 0.4; interocellar distance 0.25; antennal segments: I 0.15, II 0.05, III 0.3, IV 0.3, V 0.35; rostrum segments: I 0.25, II 0.3, III 0.35, IV 0.2; pronotum length 1.0; width across anterior margin 0.65; width across humeral angles 1.5; scutellum: length 0.8, width 0.85; length of fore femora 0.6; fore tibiae 0.7; fore tarsi: I 0.1, II 0.05 III 0.15; length of hind femora 0.85; hind tibiae 1.0; hind tarsi: I 0.1, II 0.05, III 0.15.

Holotype Male. Mexico: Chiapas, Amatenango del Valle, 12-VIII-2006, D.N. Velasquez, Parcela 7, trampa 15 ( CNIN).

Distribution. Mexico: Chiapas.

Etymology. From the Latin dentis = tooth referring to the tooth on the lateral margin of pronotum.

Figures

FIGURES 2 A – D. Dorsal view of adults. a. A. denticulatus new species, b. A. laevifemoralis new species, c. A. longinoi new species, d. A. lorenae 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.