Nemognathomimus wappesi, Gutiérrez & Noguera, 2017

Gutiérrez, Nayeli & Noguera, Felipe A., 2017, Two new species of the genus Nemognathomimus (Coleoptera: Cerambycidae) from Mexico and Guatemala, Zootaxa 4365 (1), pp. 71-80 : 73-76

Nemognathomimus wappesi sp. nov.

( Figs. 9–16, 17–19, 23–25 )

Holotype male. Length 7.6 mm; width: 1.7 mm. Form small; narrow, elongated; integument polished, shiny and black, elytra greenish black; with semi-erect setae clothing entire body. Head 1.1X longer than wide; front trapezoidal, widest distally, medially depressed before posterior clypeus, from where it widens posteriorly, forming a “V”, each half slightly convex transversely, with minute, deep, contiguous-confluent punctures, integument with areolate-rugose appearance; setae sparse; anterior clypeus trapezoidal, with apex narrower, posterior clypeus subtriangular, micro-rugouse, without punctures; genae 0.2X eye length, with apical margins rounded and notched in superior third; vertex longitudinally convex, with minute, deep, contiguous-confluent punctures, with abundant suberect setae not obscuring integument; neck abruptly constricted; eyes large, 1.5X longer than wide, notched; antennae 0.7X longer than body, last segment reaching third abdominal segment, first four segments and half of fifth with shining integument and clothed with dark suberect setae, remaining segments with integument microrugose, opaque, clothed with shorter, subrecumbent setae, antennal formula (proportion) based on length of third segment: scape = 0.88, pedicel = 0-23, IV = 0.80, V = 1.03, VI = 0.84, VII = 0.69, VIII = 0.65, IX = 0.53, X = 0.50, XI = 0.65; segments 5–11 thickened moderately, with transverse sensorial pits in apex. Pronotum campanuliform, base 1.1X wider than apex, sides slightly curved in apical half, hind angles acute, basal margin widely bisinuate, apical margin truncate; disc strongly convex, with small punctures contiguous-confluent, clothed with suberect setae. Scutellum triangular, black, with small punctures contiguous-confluent. Elytra 3.1X longer than wide, sides almost straight, slightly narrower near middle; apices rounded; with punctures moderately deep on base and becoming finer toward apex, punctures separated by two or three times their diameter, each puncture bearing one suberect setae. Prosternum with very sparse setae; procoxal process laminar; procoxae contiguous; mesosternum finely, densely punctate, punctures contiguous-confluent, pale setae moderately dense; width of mesocoxal process 0.4X width of mesocoxa; metasternum densely punctate and clothed with suberect setae, sides of metathoracic discrimen deeply punctate. Legs densely clothed with pale suberect setae. Abdomen with basal segments finely punctate, densely clothed with pale setae that become sparser toward last segment; last segment uniformly convex, sides curved, apical margin feebly emarginate, punctures dense and deep, setae short. Genitalia with tegmen in lateral view weakly curved, parameres strongly sclerotized (dark color), separated in first half forming an internal curve, apices arcuately converge to almost touch apically; with two kinds of setae, one long, thick and concentrated around apex, and other short and slender on ventral side; penis in lateral view evenly curved, with apex acuminate.

Allotype female. Length 7.8 mm; width: 2 mm. Form similar to male, but with following differences: body broader and more robust; genae longer; antennae slightly shorter; pronotum with base 1.1X wider than apex; elytra parallel sided, 2.9X longer than wide; abdomen orange, clothed with short setae; apical margin of terminal segment rounded.

Type material. Holotype male, MEXICO, Chiapas, Sumidero Cyn. NR [near] Tutl. Gtz. 4000' VII-6–8-1986, J. E. Wappes col. ( EBCC) . Allotype, GUATEMALA, Zacapa, Sn Lorenzo Road , 1500-1800' 1–10 June 1991, E. Giesbert col. ( EBCC) . Thirty-seven paratypes as follows: MEXICO, Chiapas, Sumidero Cyn. 4000 June 20 1987, E. Giesbert (5 males, EMEC) ; same locality: June 14 (1 male, EMEC; 1 female, FSCA) ; June 24 (1 male, 1 female, FSCA); June 14–26, Jim Wappes col. (7 males, ACTM); July 7–8 1986 (1 male, 1 female, FSCA); NR Tutl. Gtz. VII-6–8-1986, J.E. Wappes col. (2 males, ACMT) ; 17 km W Tuxtla Gutiérrez 3300’ June 21–25 1987 (1 male, EMEC) . Oaxaca, 26 km SSE de Cuicatlán 17°36'.988, 96°55.392, 22-VII-1998, 1080 m. s/076 DOM, F.A. Noguera col. (1 male, 1 female, EBCC) . GUATEMALA, Zacapa, Sn Lorenzo Road , 1500–1800' 1–10 June 1991, J.E. Wappes col. (2 males, 1 female, ACTM) ; same locality: VI-9-1991, E. Giesbert col. (4 males, EMEC) ; 12–14 km S Sn Lorenzo 1000–2000’, June 3–6 1989, J.E. Wappes (4 males, ACMT) ; 600 m, May 22 1995, Giesbert and Monzon cols. (1 female, EMEC); 1–15-1991, E. Giesbert col. (1 male, 1 female, EMEC).

Diagnosis. This species differs from N. pallidulus in coloration, body size, shape of the last abdominal sternite and male genitalia. Individuals of N. wappesi are all black with elytra greenish, usually smaller, with the last sternite uniformly convex, sides curved and apical margin emarginate (fig. 25) and parameres strongly sclerotized (dark color), with the intern margin curved inward and apices slightly wider (figs. 14–15). In N. pallidulus , individuals are usually bicolored (orange and black), usually larger in size, with the last sternite depressed apically, sides and apical margin straight. From congeners, this species is easily separated by the greenish-black elytra; last sternite with sides curved, apical margin emarginate, and parameres strongly sclerotized (dark color), with the internal margin curved inward and apices slightly wider.

Variation. The total length varies in males and females from 7–9 mm. Length and abundance of setae varies; in some specimens the pronotal disk and elytra bear abundant, long erect setae, and in others the setae are scarce and short.

Remarks. We studied material collected in Quintana Roo, Mexico which at first we considered could be conspecific with N. wappesi ; however, some morphological differences seem to indicate that those individuals could belong to another species. We think it is necessary to have a greater number of individuals for study to confirm that, thus we decided not to include those specimens in our description.

Etymology. We are pleased to dedicate this species to James E. Wappes, who collected most of the material used to describe the species and also for his contributions to the knowledge of the American cerambycids.

Figures

FIGURES 9–17. Nemognathomimus wappesi sp. nov. 9–11 dorsal, lateral and ventral habitus of holotype; 12–14 dorsal, lateral and ventral habitus of allotype; 15–16 dorsal and ventral view of parameres; 17 female stylus.

FIGURES 18–29. Comparison of body structures between N. wappesi sp. nov. and N. pallidulus (Linsley, 1935); 18–20 and 24–26 male and female head, male elytra, male and female pronotum and last male abdominal sternite of N. wappesi sp. nov.; 21–23 and 27–29 male and female head, male elytra, male and female pronotum and last male abdominal sternite of N. pallidulus.