Cyclocaccus maculatus Hisamatsu, 2016

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

Cyclocaccus maculatus Hisamatsu , new species ( Figs. 1K , 8 , Map 3)

Type Series. Holotype ( SEMC): ♂, ‘ MEXICO: Puebla / 23.1 km E Vicente / Guerrero ( Santa Maria / del Monte V. G.) / 16 July 1992, 2420 m / J. S. Ashe #83, ex: gilled mushrooms’ . Paratypes: [ MEXICO] 6♂ 4♀, same data as the holotype ( SEMC) ; 1♀, Mpio. Gomez Farias, Rancho de Cielo , Tamaulipas, sweep, 3. VII. 1989, R. Jones leg. ; 1♀, 3–4 miles north Gomez Farias , Tamaulipas, 800 m, 9. XI. 1986, R. W. Jones leg. ( SEMC) ; 1♀, 16 km NE C. Oaxaca, 2,200 m, 16. VIII. 1988, J.T. Doyen leg. ( SEMC) ; 3♂ 3♀, Hidalgo, 7 mile SW Tenango de Doria , 7,000 ft., ex.: on fungi, 1–7. VII. 1971, A. Newton leg. ( MCZ) ; 5♂ 10♀, 1 mile S. Honey, Puebla, 6,800 ft., ex: on fungi, 1–6. VII. 1971, A. Newton leg. ( MCZ) ; 1♂, Hidalgo, 2.4 mile, N. Tlanchinol, ex: berlese cloud for litter, 16. VI. 1983, C.O’ Brien & G. Marshall leg. ( ARCC) ; 1♀, Hgo., Hwy , 105, 2.4 mile, N. Tlanchinol, 5,000 ft., 1. VIII. 1982, C.W. & L.O’ Brien & G. Wibmer leg. ( ARCC) .

Etymology. The epithet of this new species is formed from the Latin “macula” (spot; spotted), which refers to the characteristic maculation on abdominal tergite VII.

Diagnosis. This species differs from other congeners by the following combination of characters: pronotum and elytra different in color; pronotal disc pale yellow, with dark reddish brown longitudinal maculation, possessing two lateral markings; abdominal tergite VII with longitudinal dark reddish brown maculation; basal half of tarsi and apical half of tibiae dark reddish brown; antennal segment XI with one oval antennal sensilla; pro- and mesotarsal segments II and III of males moderately dilated; apical margin of tegmen truncate in ventral view; median lobe subparallel-sided; apical margin of median lobe widely rounded; apex of short, thick gonocoxites deeply incised, somewhat curved outwardly.

Similar Species. This new species is similar to C. epakros in having one antennal sensilla and rather short and thick gonocoxites, but can be distinguished by the following combination of char- acters: abdominal tergite VII with longitudinal maculation; apical area of prosternal process, basal 1/2 of each femur, apical 1/2 of each tibia, middle of metaventrite, and midline of abdominal sternites III–VII dark brown; elytra subparallelsided at basal 1/2; apical margin of tegmen truncate, shallowly emarginate at middle in ventral view; gonocoxites somewhat curved outwardly.

Description. Length 1.64–2.01 (1.86) mm, width 1.33–1.66 (1.48) mm, depth 0.77–0.94 (0.89) mm (n = 5). Male. Body ( Fig. 1K ) oval; dorsal disc of head and antennal club dark brown except apical areas of both paler; scutellum, longitudinal maculation on abdominal tergite VII, apical area of prosternal process, basal 1/2 of each femur, apical 1/2 of each tibia, middle of metaventrite, and midline of abdominal sternites III–VII also dark brown; pronotum pale yellow, with dark brown longitudinal maculation at midline, usually with vague spot on each side of the longitudinal maculation, spot rarely absent; elytra reddish brown; venter pale yellow; hypomera, elytral epipleura and legs (except maculated area of femora and tibiae) yellowish brown; body rarely almost black, but if so, maculation on pronotum and abdominal tergite VII still recognizable. Head: Dorsal disc densely punctate; interspaces reticulate. Labrum feebly notched at middle. Antenna ( Fig. 8C ) with club long and large, ACL/ASI-VIII = 0.81 (n = 1); antennal segment XI with an oval antennal sensilla; approximate ratio of each segment (n = 1) 3.19: 2.25: 2.14: 1.58: 1.94: 1.06: 1.00: 1.10: 3.89: 3.32: 4.38. Pronotum: 2.89–3.55 (3.25) times as wide as long (n = 5); disc densely punctate; interspaces reticulate. Scutellum: Disc densely punctate; interspaces reticulate. Elytra: 0.93–1.05 (0.99) times as long as wide (n = 5), 3.09–4.14 (3.71) times as long as pronotum (n = 5), subparallel-sided at basal 1/2; each elytron with 9 regular rows of punctures about as large as eye facet; interstices with sparse minute punctures. Venter: Prosternum feebly convex along midline. Metaventrite strongly convex. Abdominal sternite III without subcoxal lines. Legs: Slender; pro- and mesotarsal segments I to III moderately dilated; tarsal claws simple. Genitalia: Tegmen ( Fig. 8A ) feebly constricted at mid-length, then gradually convergent apically in ventral view; TL/TW = 2.12 (n = 1); apical and lateral margins of tegmen strongly undulating in ventral view; apical margin of tegmen subtruncate, shallowly emarginate at middle in ventral view; median lobe ( Fig. 8B ) subparallel-sided at basal 3/4, then strongly converging anteriorly in ventral view; apical margin of median lobe subtruncate; sclerites of internal sac as in Fig. 8B . Female. Pro- and mesotarsal segments I–III more weakly dilated than those of males. Ovipositor ( Fig. 8D ) with deeply incised apices of short, thick gonocoxites, somewhat curved outwardly.

Distribution. Mexico (Puebla, Oaxaca, Hidalgo and Tamaulipas) (Map 3).

Figures

Fig. 1. Dorsal habitus of Cyclocaccus species in the C. laeticulus species-group. A) C. clinei, holotype, B) C. laeticulus, holotype, C) C. laeticulus, holotype, labels, D) C. laeticulus, Venezuela, E) C. speciosus, holotype, F) C. monticola, lectotype, G) C. monticola, lectotype, labels, H) C. monticola, Guatemala, I) C. monticola, Bolivia, J) C. costaricensis, holotype, K) C. maculatus, holotype, L) C. epakros, holotype. Scale bars = 1 mm.

Fig. 8. Cyclocaccus maculatus, Mexico. A) Tegmen, ventral view, B) Median lobe, ventral view, C) Right antenna, ventral view, D) Ovipositor. Scale bars = 0.1 mm.