Cenophengus pallidus Schaeffer, 1904

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 pallidus Schaeffer, 1904

Fig. 23A-H

Cenophengus pallidus Schaeffer, 1904: 213.

Type locality.

Texas, USA.

Type material.

Holotype ♂: USA "Texas. Brownsvell, 21.V. 1904, H.S. Barber col." | BMNH.

Remarks.

Cenophengus pallidus is sister to C. sonoraensis ( Vega-Badillo et al. 2021b), but can be distinguished by the colour of the body and the interocular distance. In C. pallidus , body is yellow, whereas in C. sonoraensis , it is pale brown. The interocular distance is 1.5 times eye width in C. pallidus , in C. sonoraensis , it is twice eye width. Additionally, in C. pallidus , the pronotal disc has a longitudinal carina, whereas in C. sonoraensis , it is weakly elevated dorsally forming a small depression in the basal part of each side.

Diagnosis.

Integument chagreened, head wider than the pronotum, antennae short, less than twice the length of the pronotum, antennal rami twice as long as the respective antennomere and each elytron 3.5 times as long as wide; aedeagus with three teeth at the inner apex of paramere.

Redescription.

Male. Body length 3.84-4.50 mm, maximum body width 0.53-0.76 mm (pronotum). Body yellow (Fig. 23A, B ). Head. Wider (0.61-0.73) (0.65 ± 0.059, n = 6) than long (0.34-0.42 mm) (0.386 ± 0.037 mm, n = 6) (Fig. 23C ), at eye level, wider than the pronotum, integument chagreened, punctures 1.5 times as long as eye facets and separated by approximately 1 punctured diameter, each puncture bearing a yellow seta; interantennal distance (0.06-0.08 mm) (0.075 ± 0.0083 mm, n = 6) less than the length of antennomere 1 (0.14-0.16 mm) (0.15 ± 0.006 mm, n = 6); eyes 3/4 as long as head in lateral view, longer (0.30-0.32 mm) (0.31 ± 0.008 mm, n = 6) than wide (0.16-0.19 mm) (0.173 ± 0.013 mm, n = 6); interocular distance (0.27-0.35 mm) (0.30 ± 0.036 mm, n = 6) 1.5 times eye width; antennae short (1.20-1.34 mm) (1.275 ± 0.056 mm, n = 6) less than twice the length of the pronotum; antennomere 1 (0.14-0.16 mm) (0.15 ± 0.006 mm, n = 6) is longer than the next two combined, antennomere 3 cup-shaped, 4 (0.08-0.12 mm) (0.095 ± 0.015 mm, n = 6) shorter than the following antennomeres, 5 to 11 about equal in length (0.10-0.12 mm) (0.11 ± 0.008 mm, n = 6), 12 (terminal) (0.16-0.18 mm) (0.166 ± 0.01 mm, n = 6), antennal rami lanceolate in lateral view, twice as long as the respective antennomere; terminal maxillary palpomere robust, securiform (0.21-0.25 mm) (0.23 ± 0.017 mm, n = 6), as long as the preceding three combined; terminal labial palpomere spindle-shaped (0.09-0.10 mm) (0.095 ± 0.005 mm, n = 6), 3 times as long as preceding one (0.02-0.03) (0.21 ± 0.004, n = 6). Thorax. Pronotum longer (0.69-1.0 mm) (0.83 ± 0.14 mm, n = 6) than wide (0.53-0.76 mm) (0.64 ± 0.102 mm, n = 6) (Fig. 23D ); integument chagreened, punctures 1.5 times as long as eye facets and separated by approximately 2 punctured diameters, each puncture bearing a yellow seta, disc convex, weakly elevated dorsally forming a small depression in the basal part of each side, posterior margin curved, sides almost straight, anterior angles rounded and posterior angles acute; mesosternal suture incomplete; scutellum with posterior margin rounded; each elytron 3.5 times as long (1.2-1.4 mm) (1.33 ± 0.103 mm, n = 6) as wide (0.30-0.44 mm) (0.38 ± 0.064 mm, n = 6), convex, without longitudinal costae, elytral apex rounded; hind wings with posterior radial vein (RP) length 5.5 times less than the length of MP1+2, radial cell closed, r3 vein absent, r4 vein absent, those of the anterior anal and posterior anal sectors, evident (Fig. 23E ). 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. 23F-H ).

Female and immatures.

Unknown.

Distribution.

USA: Texas; Mexico: Nuevo León (Fig. 19 ).

Additional material examined.

USA: " Texas, Cameron Co. / Sabal Palm Grove / Audobon Reserve / 26-28 May 1979 / N. M. Downie " (1) | FMNH. " Texas, Bee Co. / 5 m N. Beeville / on US181/ 1 June 1979 / N. M. Downie " " Cenophengus / Cenophengus pallidus /Schaeffer" " N.M. Downie Colln. / 1992 Acc. Z-18,343/ FIELD MUSEUM" (1) | FMNH; "Esprza Rch/ Brownsville, Tex." (1) | CNIN; " Mexico: 5 mi. S. Monterrey / N.L. Mex. VII.22.1963/ H. Howden " " Cenophengus / Cenophengus pallidus Schaeffer/ det. W. Wittemer " (1) | FMNH. " Tx. Cameron Co. / Sabal Palm Grove/ June 9-10-1978 / J.E. Wappes " " C. pallidus " (2) | FSCA .

Figures

Figure 19. Map of southern North America showing specimen localities for Cenophengus spp. (continued).

Figure 23. Cenophengus pallidus Schaeffer, 1904, 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; RP = Posterior Radial vein; MP 1 + 2 = Posterior Median vein; CuA = Cubital vein; AP = Posterior Anal vein. Aedeagus: F dorsal view G lateral view H ventral view.