Cenophengus marmoratus Wittmer, 1976

Vega-Badillo, Viridiana, Morrone, Juan J. & Zaragoza-Caballero, Santiago, 2021, Revision of the genus Cenophengus LeConte, 1881 (Coleoptera, Phengodidae), with the description of four new species, new geographic records and a new synonymy, ZooKeys 1068, pp. 73-148 : 73

Cenophengus marmoratus Wittmer, 1976

Fig. 17A-H

Cenophengus marmoratus Wittmer, 1976: 453.

Type locality.

Veracruz, Mexico.

Type material examined.

Holotype ♂: Mexico: "Cordoba/ Mex. Ver. / Dr. A. Fenyes" " Cenophengus / mamoratus / Wittmer" "Type No./ 73886/ USMN" | NMNH.

Remarks.

Cenophengus marmoratus is morphologically similar to C. wittmeri , but can be distinguished by the colour of the body and the terminal maxillary palpomere. In C. marmoratus , the body is yellow or pale brown, the pronotum is partially interrupted by darker brown spots, whereas in C. wittmeri , they are brown, except for the middle part of the pronotum that is dark brown. The terminal maxillary palpomere is shorter than the preceding three combined in C. marmoratus , in C. wittmeri , it is as long as the preceding three combined. Additionally, in C. marmoratus , the posterior radial vein (RP) length is 1.6 times less than the length of MP1+2, whereas in C. wittmeri , it is twice less than the length of MP1+2.

Diagnosis.

Head almost as wide as the pronotum, integument chagreened, antennae long, more than twice the length of pronotum, antennal rami twice as long as the respective antennomere; pronotum mottled with darker brown spots; each elytron 4.0 times as long as wide; aedeagus with three teeth at the inner apex of paramere.

Redescription.

Male. Body length 7.9-10.3 mm; maximum body width 0.99-1.20 mm (pronotum). Body yellow or pale brown; antennal rami somewhat darker than respective antennomere, pronotum mottled with darker brown spots (Fig. 17A, B ). Head. Wider (0.86-1.10 mm) (0.1 ± 0.085, n = 6) than long (0.60-0.75 mm) (0.66 ± 0.051 mm, n = 6) (Fig. 17C ), at eye level, almost as wide as the pronotum, integument chagreened, punctures 1.5 times as long as eye facets and separated by approximately 2 punctured diameters, each puncture bearing a yellow-brown seta; interantennal distance (0.09-0.10 mm) (0.096 ± 0.005 mm, n = 6) less than the length of antennomere 1 (0.24-0.30 mm) (0.28 ± 0.025 mm, n = 6); eyes 3/4 as long as head in lateral view, longer (0.42-0.55 mm) (0.473 ± 0.045 mm, n = 6) than wide (0.20-0.27 mm) (0.24 ± 0.025 mm, n = 6); interocular distance (0.45-0.60 mm) (0.52 ± 0.057 mm, n = 6) 2.1 times longer than eye width; antennae long (2.62-3.0 mm) (2.74 ± 0.13 mm, n = 6) more than twice the length of pronotum; antennomere 1 (0.24-0.30 mm) (0.28 ± 0.025 mm, n = 6) longer than next two combined, antennomere 3 cup-shaped, 4 (0.20-0.25 mm) (0.22 ± 0.024 mm, n = 6) shorter than the following antennomeres, 5 to 11 about equal in length (0.24-0.28 mm) (0.25 ± 0.016 mm, n = 6), 12 (terminal) (0.33-0.38 mm) (0.35 ± 0.018 mm, n = 6), antennal rami lanceolate in lateral view, twice as long as the respective antennomere; terminal maxillary palpomere robust, securiform (0.31-0.36 mm) (0.33 ± 0.024 mm, n = 6), shorter than the preceding three combined; terminal labial palpomere spindle-shaped (0.15-0.20 mm) (0.17 ± 0.025 mm, n = 6), twice as long as preceding one (0.05-0.08 mm) (0.07 ± 0.015 mm, n = 6). Thorax. Pronotum longer (1.30-1.54 mm) (0.136 ± 0.09 mm, n = 6) than wide (0.92-1.22 mm) (1.1 ± 0.123 mm, n = 6) (Fig. 17D ); integument chagreened, punctures 1.5 times as long as eye facets and separated by approximately 2 punctured diameters, each puncture bearing a yellow-brown seta, convex disc, weakly elevated dorsally forming a small depression in the basal part of each side, posterior margin curved with middle notch, sides almost straight, anterior angles rounded and posterior angles acute; mesosternal suture complete; with scutellum posterior margin rounded; each elytron 4.0 times as long (2.50-3.70 mm) (3.08 ± 0.458 mm, n = 6) as wide (0.68-0.94 mm) (0.77 ± 0.116 mm, n = 6), convex, without longitudinal costae, elytral apex rounded; hind wings posterior radial vein (RP) length 1.6 times less than the length of MP1+2, radial cell closed, r3 vein present, r4 vein reduced (not reaching the RP or the radial cell), those of the anterior anal and posterior anal sectors, evident (Fig. 17E ). Legs: tarsomere 1 of pro-, meso- and metathoracic legs is longer than 2. Abdomen. Integument shiny, punctured, with long dense setae, sternite 7 with margin sinuate, sternite 8 with margin notched; aedeagus with three teeth at the inner apex of paramere (Fig. 17F-H ).

Female and immatures.

Unknown.

Distribution.

Mexico: Veracruz, Hidalgo, San Luis Potosí, and Querétaro (Fig. 3 ).

Additional material examined.

" Mexico: Hidalgo /: km 14 Carr. Huejutla- /Atlepexco 13-05-1999 / H. Brailovsky y E. Barrera" (1) | CNIN " MEXICO: Hidalgo, Cuautepec / Tezoncualpan "El Caminero" / Bosque de encino. / N 19° 56' 53.8" W 98° 16' 27.9". /Trampa intercepción de vuelo, / 22 a 29- VIII-2009, M. Torres col." (1) | CNIN; " San Luis Potosí: /Rio Micos /9-IV-78 / Col S.Z.C." (2) | CNIN; " MEXICO: San Luis Potosí /Xilitla, Los Pozos/ 21 22 45 N 99 00 15 O/ 780 m. a.s.l. 03-VII-2006 / L. Cervantes, D. Brzoska " (1) | CNIN; "Mexico: Querétaro: / Misión de Bucareli, / N 21° 02' 280"/ O 99° 36' 885"/ 1150 m.a.s.l. 1. III.1998 / G. Ortega, E. Barrera " (1) | CNIN .

Figures

Figure 3. Map of southern North America showing specimen localities for Cenophengus spp.

Figure 17. Cenophengus marmoratus Wittmer, 1976, male. Habitus: A dorsal B ventral C head dorsal D pronotum dorsal E hind wing. Wing venation: CR = Radial Cell; r 3 = radial 3 vein; r 4 = radial 4 vein; RP = Posterior Radial vein; MP 1 + 2 = Posterior Median vein; CuA = Cubital vein; AA and AP = Anterior and Posterior Anal veins. Aedeagus: F dorsal view G lateral view H ventral view.