Cyclocaccus stonyx 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 stonyx Hisamatsu , new species ( Figs.15B–D , 18 , Map 5)

Type Series. Holotype ( INBIO): ♂, ‘ Estacion Pitilla 9 km. S. de Santa / Cecilia, Prov. Guana, COSTA RICA. / 700 m, MAY 1995. P. Rios, C. Moraga, / Interseccion L _N_329950_380450 / #6212 // COSTA RICA INBIO / CRI002 / 427097 ’. Paratypes: [ COSTA RICA] 1♀, E.B. San Ramon, R.B. San Ramon, 27 km N & 8 km W. San Ramon , Alajuela, 810 m, 10°13′04″N, 84°35′46″W, ex: flight intercept trap, 8. VII. 2000, J. Ashe, R. Brooks, & Z. Falin leg. ( SEMC) ; 1♂, Rancho Quemado, Peninsula de Osa , A.C. Osa, Puntarenas, 200 m, 6–12. II. 1994, A.L. Marín leg. ( INBIO) ; 1♂, ditto, but 6–28. IV. 1994, A.L. Marín leg. ( INBIO) ; 1♂, ditto, but 12–24. V. 1993, A. Gutiérrez leg. ( INBIO) ; 1♂, Est. Aguias. Send. Zamia. Puntarenas, 300 m, 3–6. V. 1998, M. Lobo leg. ( INBIO) ; 1♀, 10 km W. Puerto Viejo, Heredia, 2–5. III. 1991, 170 m, ex: flight intercept trap, H. & A. Howden leg. ( CMN) ; 2♂ 1♀, ditto, but 2. III. 1991 ; 1♀, Biol. La Selva , Heredia, 50– 150 m, 10°26′N, 84°01′W, ex: Malaise trap, 1. VII. 1993 ( ARCC) . [ PANAMA] 1♂ 2♀, 14 km N. jct. Escobal & Piña Rd. S. Colón, ex: flight intercept trap, 2–11. VI. 1996, J. Ashe and R. Brooks leg. ( SEMC) ; 1♀, Barro Colorado IS, Panamá, 40 m, 9°11′N, 79°51′W, ex: flight intercept trap, 25–30. VI. 2000, S. Chatzimanolis leg. ( SEMC) ; 1♂ 1♀, San Lorenzo Forest , STRI crane site ,

Colón, 09°17′N, 79°58′W, ex: flight intercept trap, 20–21. V. 2004, A. Tishechkin leg. ( ARCC). [ ECUADOR] 1♂, 47 km S. Sto. Domongo, Rio Palenque , Pichincha, 250 m, rainforest, ex: malaise– flight intercept trap, 5. V.–25, VII. 1985, S. &. J. Peck leg. ( CNC) ; 3♀, 16 km E. Santo Domingo, Tinalandia , Pichincha, 680 m, rainforest, ex: malaise– flight intercept trap, 4. V.–25. VII. 1985, S. & J. Peck leg. ( CNC) ; 1♀, Tinalandia, Santo Domingo , 16 km S, Pichincha, 750 m, 00°16′53″S, 79°03′39″W, ex: flight intercept trap, 26–27. III. 1999, R. Brooks & D. Brzoska leg. ( SEMC) .

Etymology. The epithet of this new species is formed from the Greek “stonyx” (sharp process), which describes the sharply prominent lateral process of the gonocoxites of this species.

Diagnosis. This species differs from other congeners by the following combination of characters: pronotum and elytra different in color, without any maculation on dorsal disc; metathoracic discrimen present in apical 1/5; subcoxal lines on abdominal sternite III present; pro- and mesotarsal segments II and III of males strongly dilated; tegmen very long, subparallel-sided in ventral view; TL/TW = 2.87 (n = 1); apical margin of tegmen widely rounded in ventral view; median lobe subparallel-sided; apical margin of median lobe widely rounded; apices of gonocoxites square, with apicolateral corners sharply prominent laterally.

Similar Species. This new species is similar to C. smileyeyes , but can be distinguished by the following combination of characters: pronotum without any maculation; elytra subparallel-sided; shape of sclerites of internal sac different; and apicolateral corners of gonocoxites sharply prominent laterally.

Description. Length 2.16–2.79 (2.50) mm, width 1.67–2.20 (1.98) mm, depth 0.85–1.23 (1.07) mm (n = 4). Male. Body ( Fig. 15B–D ) widely oval; dorsal disc of head (except paler apical area) reddish yellow to dark reddish brown; antennal segments I–VIII, pronotum, hypomera, prosternum (except apical area of prosternal process dark reddish brown), and elytral hypomera reddish yellow; elytra dark reddish brown to black, usually darker laterally than middle; scutellum reddish yellow to dark reddish brown; antennal club dark brown except apex paler. Head: Disc densely punctate; interspaces reticulate. Labrum feebly notched at middle. Antenna ( Fig. 18G ) with club long and large, ACL/ASI-VIII = 0.86 (n = 1); antennal segment XI with 2 oval antennal sensillae; approximate ratio of each segment (n = 1) 4.00: 3.36: 2.20: 1.73: 1.67: 1.11: 1.00: 1.09: 2.63: 2.93: 8.37. Pronotum: 2.58–3.04 (2.76) times as wide as long (n = 4); disc densely punctate; punctures on disc large, slightly smaller than eye facets; interspaces reticulate. Scutellum: Disc densely punctate; punctures on disc about as large as those on pronotum; interspaces reticulate. Elytra: 0.91– 0.97 (0.95) times as long as wide (n = 4), 2.85– 3.43 (3.04) times as long as pronotum (n = 4), subparallel-sided from base to basal 1/3; each elytron with 9 regular rows of punctures about as large as eye facet; interstices with dense minute punctures. Venter: Prosternum strongly convex along midline, with tuft of setae at middle. Metaventrite strongly convex; metathoracic discrimen present in apical 1/5. Abdominal sternite III with subcoxal lines; lateral margins of abdominal sternite VII strongly serrate. Legs: Robust; pro- and mesotarsal segments I–III strongly dilated; tarsal claws simple. Genitalia: Tegmen ( Fig. 18A, C, E ) subparallel-sided; TL/TW = 2.87 (n = 1); apical margin of tegmen widely rounded in ventral view; median lobe ( Fig. 18B, D, F ) subparallel-sided in ventral view; apical margin of median lobe widely rounded in ventral view; sclerites of internal sac as in ( Fig. 18B, D, F ). Female. Prosternum without tuft of setae at middle. Pro- and mesotarsal segments I–III more weakly dilated than those of males. Ovipositor ( Fig. 18H ) with squared apices of gonocoxites; apicolateral corners of gonocoxites sharply prominent laterally.

Variability. This species expresses slight variations in body coloration, shape of the elytral margins, and appendages of the median lobe.

Distribution. Costa Rica, Panama, and Ecuador (Map 5).

Cyclocaccus morulus Hisamatsu , new species ( Figs. 15E , 16A–J, L–Q , 19 , Map 5)

Type Series. Holotype ( SEMC): ♂, ‘ECUADOR: Napo, Yasuni / Res. Stn. mid. Rio Tiputini / 0°40.5′S, 76°24′W. F.I.T. #M1 / 28 June – 5 July 1999 AKT 046 / C. Carlton, A. Tishechkin // LSAM0009216 ’. Paratypes: [ ECUADOR] 1♂, Sacha Lodge , Sucumbios, 270 m, 00°28′14″S, 76°27′35″W, ex: flight intercept trap, 21–24. III. 1999, R. Brooks leg. ( SEMC) ; 1♂, Yutri Lodge , Napo, ex: flight intercept trap, 21. III. 1999, R. Brooks leg. ( SEMC) . [ BRASIL] 1♂, secondary mountain Atlantic for., 17 km, E Nova Friburgo , Rio De Janeiro, 22°23′04″S, 42°33′30″W, 750 m, 29. I. 2000, ex: flight intercept trap, F. Génier & S. Ide leg. ( CMN) . [ PARAGUAY] 1♂, Karonay, 17 km W, San Rafael Reserve , Itapua, 26°45′53″S, 55°50′37″W, 90–110 m, ex: under bark, 20. XI. 2000, Z. H. Falin leg. ( SEMC)

Etymology. The specific epithet means “dark colored,” a reference to the dark reddish brown body of this species.

Diagnosis. This species differs from other congeners by the following combination of characters: body completely dark reddish brown; metathoracic discrimen absent; subcoxal lines on abdomi- nal sternite III present; pro- and mesotarsal segments II and III of males strongly dilated; tegmen elongate, subparallel-sided; TL/TW = 2.94 (n = 1); apical margin of tegmen widely rounded in ventral view; median lobe subparallel-sided; apical margin of median lobe widely rounded, with shallow emargination at middle; apices of gonocoxites square, with apicolateral corners widely rounded.

Similar Species. This new species is similar to C. lescheni in the shape of antennal segment XI and male genitalia, but can be distinguished by the following combination of characters: body completely dark reddish brown; shape of sclerites of internal sac different.

Description. Length 2.12–2.59 (2.34) mm, width 1.74–2.13 (1.89) mm, depth 1.00–1.30 (1.10) mm (n = 4). Male. Body ( Fig. 15E ) oval; dorsal disc dark reddish brown; apical half of head, mouthparts, antennal segments I–VIII, elytral epipleura, and tarsi paler; antennal club dark brown except apex paler. Head: Disc densely punctate; interspaces reticulate. Labrum feebly notched at middle. Antenna ( Fig. 19C ) with club long and large, ACL/ ASI-VIII = 0.66 (n = 1); antennal segment XI with 2 oval antennal sensillae; approximate ratio of each segment (n = 1) 3.86: 2.16: 2.41: 1.78: 1.65: 1.05: 1.14: 1.00: 2.46: 2.68: 4.84. Pronotum: 2.77–2.99 (2.93) times as wide as long (n = 4); disc densely punctate; punctures on disc large, slightly smaller than eye facets; interspaces reticulate. Scutellum: Disc densely punctate; punctures on disc about as large as those on pronotum; interspaces reticulate. Elytra: 0.92–0.97 (0.94) times as long as wide (n = 4), 3.11–3.29 (3.19) times as long as pronotum (n = 4), subparallel-sided from base to basal 1/2; each elytron with 9 regular rows of punctures about as large as eye facet; interstices with dense, minute punctures. Venter: Prosternum strongly convex along midline, with tuft of setae at middle. Metaventrite strongly convex; metathoracic discrimen absent. Abdominal sternite III with subcoxal lines; abdominal sternite VII with dense punctures and short setae at apical area; lateral margins of abdominal sternite VII serrate. Legs: Robust; pro- and mesotarsal segments I to III strongly dilated; tarsal claws simple. Genitalia: Tegmen ( Fig. 19A ) subparallel-sided; TL/TW = 2.94 (n = 1); apical margin of tegmen widely rounded in ventral view; median lobe ( Fig. 19B ) elongate, subparallel-sided in ventral view; apical margin of median lobe widely rounded, shallow emarginate at middle in ventral view; sclerites of internal sac as in Fig. 19B .

Female. Unknown.

Variability. No variation was apparent among specimens available for study.

Distribution. Ecuador, Brazil, and Paraguay (Map 5).

Figures

Fig. 15. Dorsal habitus of Cyclocaccus species in the C. morulus species-group. A) C. lescheni, holotype, B) C. stonyx, holotype, Costa Rica, C) C. stonyx, Panama, D) C. stonyx, Ecuador, E) C. morulus, holotype, F) C. smileyeyes, holotype, Bolivia, G) C. intermediatus, holotype. Scale bars = 1 mm.

Fig. 18. Cyclocaccus stonyx, Costa Rica. A, C, E) Tegmen, ventral view, B, D, F) Median lobe, ventral view, G) Right antenna, ventral view, H) Ovipositor. A–B, G–H from Guanacaste specimens; C–D from Heredia specimen;; E–F from Puntarenas specimen. Scale = equal 0.1 mm.

Fig. 16. Diagnostic characters of the C. morulus species-group. Cyclocaccus morulus: A) Ventral habitus, B) Head, dorsal view, C) Head, ventral view, D) Labrum, E) Mentum and labium, ventral view, F) Right maxilla, dorsal view, G) Right mandible, dorsal view, H) Scutellum, I) Male abdominal tergite VII, J) Male abdominal sternite VII. Cyclocaccus intermediatus: K) Male abdominal tergite VII. Cyclocaccus morulus: L) Metendosternite, dorsal view, M) Male protibia and protarsus, dorsal view, N) Male mesotibia and mesotarsus, dorsal view, O) Male metatibia and metatarsus, dorsal view, P) Male abdominal tergite VIII and spiculum gastrale, ventral view, Q) Left metanepisternum. Scale bars: A = 1 mm; B–C, I–K, P–Q = 0.5 mm; D–H, L–O = 0.1 mm.

Fig. 19. Cyclocaccus morulus, Ecuador. A) Tegmen, ventral view, B) Median lobe, ventral view, C) Right antenna, ventral view. Scale bars = 0.1 mm.