Amnestus zacki, M, Cristina Mayorga & P, Luis Cervantes, 2009

M, Cristina Mayorga & P, Luis Cervantes, 2009, Two new species of Amnestus from Guatemala, with new records for some other Guatemalan burrower bugs (Hemiptera: Heteroptera: Cydnidae), Zootaxa 2311, pp. 19-37 : 20-21

Amnestus zacki sp. nov.

( Figs. 1–6)

Diagnosis. This species is recognized by these characters: fore tibia slightly flattened with seven spines on external margin ( Fig.4 ); and prosternal carinae longer than high, with ventral margin straight. A. zacki is similar to A. uhleri Distant , because both species have five pegs on juga; although A. zacki has seven spines on fore tibia whereas A. uhleri has only six; the acute apex of the parameres in A. uhleri is much longer.

Head. Antennal segments III, IV, and V, pronotum, scutellum, and abdominal venter dark brown. Prosternal carina, and legs pale brown. Antennal segments I, III, rostrum, marginal carina of pronotum, clavus, and corium pale yellow.

Head. Middle region of head with anterior part without punctures, tylus with four robust pegs on its apex and longer than jugum; antenna with five segments, second very small; rostrum short, reaching base of metasternum. Thorax. Pronotum with anterior margin concave and middle part of anterior lobe strongly convex and with densely distributed punctures, anterolateral margins carinated along their length, posterior margin wide and convex and laterally straight. Propleura smooth and shiny, prosternal carina elevated and straight with a series of fine hairs ( Fig.4 ). Mesopleura even, evaporatorium expanded and reaching posterior and lateral margins of pleura, with a shiny area on posterior region. Metapleura even, evaporatorium extended into middle part of the pleura, peritreme shiny and long, with apex slightly curved, posterior margin of evaporatorium entire, with short hairs ( Fig.5 ). Legs. Anterior tibia slightly flattened with seven spines on external margin, anterior femur with a bifid spine on middle part of ventral surface ( Fig.2 ); internal and external margins of posterior femur smooth with a simple spine close to its apex on ventral surface ( Fig. 3 ). Scutellum. Triangular with acute apex, disc with dense punctures. Hemelytra. Corium with evenly distributed punctures, clavus with three pale rows of punctures; membrane hyaline, longer than apex of abdomen. Abdomen. Ventrally convex with fine hairs.

Male genitalia. Parameres slightly dilated with acute apex, with eleven long setigerous punctures on the middle area, followed by a series of short setigerous punctures ( Fig. 6 ).

Male measurements. Body length 4.0 ± 0.3; head length 0.64 ± 0.09; width across eyes 0.81 ± 0.01; interocular distance 0.46 ± 0.03; interocellar distance 0.24 ± 0.04; antennal segments: I 0.24 ± 0.04, II 0.10 ± 0, III 0.41 ± 0.01, IV 0.27 ± 0.07, V 0.41 ± 0.06; rostral segments: I 0.36 ± 0.04, II 0.36 ± 0.06, III 0.30 ± 0, IV 0.25 ± 0; pronotum length 1.41 ± 0.1; width across anterior margin 0.86 ± 0.06; width across humeral angles 2.0 ± 0.1; scutellum: length 0.89 ± 0.1, width 1.2 ± 0.04; length fore femur 0.75 ± 0.05; length fore tibia 0.90 ± 0.1; fore tarsi: I 0.10 ± 0, II 0.05 ± 0, III 0.15 ± 0; length posterior femur 1.1 ± 0.01; length posterior tibia 1.3 ± 0.1; posterior tarsi: I 0.10 ± 0, II 0.05 ± 0; III 0.15 ± 0.

Female measurements. Body length 4.0 ± 0.01; head length 0.65 ± 0.05; width across eyes 0.84 ± 0.01; interocular distance 0.47 ± 0.03; interocellar distance 0.25 ± 0; antennal segments: I 0.25 ± 0.03, II 0.10 ± 0, III 0.39 ± 0.06, IV 0.32 ± 0.03, V 0.40 ± 0; rostral segments: I 0.33 ± 0.03, II 0.39 ± 0.04, III 0.30 ± 0, IV 0.25 ± 0; pronotum length 1.36 ± 0.04; width across anterior margin 0.90 ±0; width across humeral angles 2.1 ± 0.02; scutellum: length 0.95 ± 0.05, width 1.1 ± 0.02; length fore femur 0.74 ± 0.06; length fore tibia 0.83 ± 0.07; fore tarsi: I 0.10 ± 0, II 0.05 ± 0, III 0.15 ± 0; length posterior femur 1.1 ± 0; length posterior tibia 1.2 ± 0; posterior tarsi: I 0.10 ± 0, II 0.05 ± 0, III 0.15 ± 0.

Material Examined. HOLOTYPE: Male. Guatemala: Suchitepequez Dept. Finca los Tarrales Ca. 8 km. N of Patulul, 8-june-2005, 14°31.37’ N 91°08.17’ W, 760 msnm, BL/MV Traps, R.S. Zack ( WSUC).

PARATYPES: Guatemala: Suchitepequez Dept. Finca los Tarrales Ca. 8 km, N of Patulul, 8-june-2005, 14° 31.37’ N 91°08.17’ W, 760 msnm, BL/ MV Traps, R.S. Zack. five males and three females ( CNIN, IEXA, UVGC). Paraguay: Pastoreo 3-5-I– 1972, Coll. L.E. Pena. 24 male and 29 female, Paraguay: Asunción 11- XII-1990, 1 female.

Etymology. Dedicated to Dr. Richard Zack from Washington State University, who collected most of the material included in this paper.

Figures

FIGURES 2 – 6. Amnestus zacki sp. nov. 2. Fore leg. 3. Hind leg. 4. Prosternal carina. 5. Metathoracic scent gland. 6. Paramere.