Cyclocaccus epakros Hisamatsu

Hisamatsu, Sadatomo, Bayless, Victoria M. & Carlton, Christopher E., 2016, Revision ofCyclocaccusSharp (Coleoptera: Nitidulidae: Nitidulinae), The Coleopterists Bulletin 70 (4), pp. 825-870: 825-870

publication ID

http://doi.org/ 10.1649/0010-065X-70.4.825

persistent identifier

http://treatment.plazi.org/id/F042A324-FFCA-FFBA-0ABF-E91DFCEA8840

treatment provided by

Diego

scientific name

Cyclocaccus epakros Hisamatsu
status

new species

Cyclocaccus epakros Hisamatsu   , new species ( Figs. 1L View Fig , 9 View Fig , Map 3)

Type Series. Holotype ( SEMC): ♂, ‘ MEXICO: Guerrero / ca. 78 km NE Atoyac de / Alvarez , 27. VII. 1992 / 1960–2120 m, J. S. Ashe / H. Frania #133. ex: leaf / litter/rotten wood’   . Paratypes: [ MEXICO] 2♂ 1♀, same data as the holotype ( SEMC)   ; 2♀, 6.4 miles southwest, Guerrero, ca. alt. 9,000 ft., 8. VII. 1987, K. Schaffner leg. ( SEMC)   ; 1♀, Cerro, Huitepec ( Pico ), ca. 5 km, W. San Cristobal, Chiapas, alt. 2,750 m, ex: cloud forest litter, 18. IX. 1991, R. Anderson leg. ( CMN)   .

Etymology. The specific epithet is derived from the Greek word “epakros” meaning “pointed at the end,” a reference to the strongly acuminate apex of the tegmen in ventral view.

Diagnosis. This species differs from other congeners by the following combination of characters: pronotum and elytra different of colors; pronotum pale yellow, with dark brown longitudinal maculation at midline, possessing two vague lateral markings; antennal segment XI with one oval antennal sensilla; pro- and mesotarsal segments II and III of males moderately dilated; apical margin of tegmen strongly acute in ventral view; median lobe subparallel-sided in ventral view; apical margin of median lobe widely rounded; apex of short, thick gonocoxites deeply incised.

Similar Species. This new species is similar to C. maculatus   in having one antennal sensilla and rather short and thick gonocoxites, but can be distinguished by the following combination of characters: abdominal tergite VII and legs fully reddish brown to chestnut brown; apical margin of tegmen strongly acute in ventral view. It is also similar to C. monticola   , but can be distinguished by the following combination of characters: antennal segment XI with one oval antennal sensilla; apical margin of tegmen strongly acute in ventral view; gonocoxites short and thick.

Description. Length 1.63–2.21 (2.03) mm, width 1.30–1.72 (1.60) mm, depth 0.93–1.02 mm (0.97) (n = 5). Male. Body ( Fig. 1L View Fig ) oval; dorsum and venter strongly shining; strongly convex dorsally, moderately convex ventrally; dorsum and venter glabrous. Dorsal disc of head, antennal club (except paler apical area of segment XI), and scutellum dark brown; pronotum pale yellow, with dark brown longitudinal maculation at midline, usually with vague spot on each side of the longitudinal maculation; elytra, abdominal tergites, and venter reddish brown to chestnut brown; hypomera and elytral epipleura pale yellow. Head: Dorsal disc possessing sparse, minute punctures; interspaces reticulate. Labrum feebly notched at middle. Antenna ( Fig. 9C View Fig ) with club long and large, ACL/ASI-VIII = 0.82 (n = 1); antennal segment XI with an oval antennal sensilla; approximate ratio of each segment (n = 1) 3.23: 2.24: 2.29: 1.59: 1.72: 1.10: 1.00: 1.13: 4.00: 3.24: 4.44. Pronotum: 2.92–3.28 (3.10) times as wide as long (n = 5); disc possessing sparse, minute punctures; interspaces reticulate. Scutellum: Disc possessing few minute punctures; interspaces reticulate. Elytra: 0.97–1.03 (1.00) times as long as wide (n = 5), 3.45–4.02 (3.77) times as long as pronotum (n = 5), widest at middle; each elytron with 9 regular rows of punctures about as large as eye facet; interstices without punctures or with few minute punctures. Venter: Prosternum feebly convex along midline. Metaventrite strongly convex. Abdominal sternite III without subcoxal lines. Legs: Slender; pro- and mesotarsal segments II and III moderately dilated; tarsal claws simple. Genitalia: Tegmen ( Fig. 9A View Fig ) long, TL/TW = 2.18 (n = 1), constricted at midlength, then strongly convergent apically; apical and lateral margins of tegmen strongly undulating in ventral view; apical margin of tegmen strongly acute in ventral view; median lobe ( Fig. 9B View Fig ) long, in ventral view subparallel-sided; apical margin of median lobe widely rounded; sclerites of internal sac as in Fig. 9B View Fig . Female. Pro- and mesotarsal segments I–III more weakly dilated than those of males. Ovipositor ( Fig. 9D View Fig ) with deeply incised apices of short, thick gonocoxites.

Distribution. Mexico (Guerrero and Chiapas) (Map 3).

SEMC

University of Kansas - Biodiversity Institute

CMN

Canadian Museum of Nature