Chelobasis bicolor Gray 1832

Staines, C. L., 2009, A review of the genus Chelobasis Gray, 1832 (Coleoptera: Chrysomelidae: Cassidinae), Zootaxa 2033 (1), pp. 58-68 : 60-63

Chelobasis bicolor Gray 1832

( Figures 2 , 6 , 9 )

Chelobasis bicolor Gray 1832: 143 (type: South America; OXUM). Gemminger and Harold 1876: 3608 (as synonym of Arescus labiatus ); Donckier 1899: 568 (as synonym of Arescus labiatus ); Weise 1910: 101 (note), 1911a: 12 (catalog), 1911b: 17 (catalog); Uhmann 1930: 236 ( Costa Rica species), 1939: 298 (distribution), 1957: 33 (catalog); Maulik 1937: 133 (host plants); Blackwelder 1946: 721 (faunal list); Papp 1953: 29 (catalog); Wilcox 1975: 138 (catalog); Strong 1977a: 163 (host plants), 1977b: 573 (host plants), 1981: 184 (host plants), 1983: 708 (biology); Staines 2002b: 6 (types), 2004: 309 (host plants); Flowers & Hanson 2003: 51 (distribution); Jolivet 2003: 315

(note); Meskins et al. 2008: 163 (host plants).

Arescus labiatus Baly (not Perty) 1858: 84 (misidentification).

Arescus bicolor (Gray) . Baly 1885: 31 (distribution).

Chilobasis bicolor Gray. Maulik 1931: 1149 (misspelling).

Chelobasis bicolor acutangula Weise 1910: 102 (type: Panama, depository unknown). Weise 1911a: 12 (catalog), 1911b: 17 (catalog); Blackwelder 1946: 721 (faunal list); Papp 1953: 29 (catalog); Uhmann 1957: 33 (catalog).

Oblong-elongate; pronotal and elytral markings extremely variable. Head: frontal horn narrows to apex, apex rounded or truncate; depressed between eyes; vertex and frons impunctate; clypeus micropunctate. Antennae: antennomere 1 robust, thickened, with projection on inner apical margin, flattened ventrally, projection reaches to near apex of 2; 2 cylindrical, short, ½ length of 3; 3 cylindrical, longest, as long as 1 and 2 combined; 4-7 each subequal in length; 8-10 transverse, wider and shorter than preceding; 11 rounded at apex; 1-10 with scattered setae, 11 setose. Pronotum: transverse; lateral margin sinuate; anterior angle rounded; posterior angle acute, with large punctures; slightly depressed at base; pronotal length 1.7-2.1 mm (n=20); pronotal width 2.9-3.4 mm. Scutellum: elongate triangle; alutaceous. Elytron: oblong, parallel; apices cojointly rounded; punctate striate; lateral and apical margins smooth; humerus rounded, not produced; punctures moderately impressed; rows tend to coalesce at apex; elytral length 7.0- 9.1 mm; elytral width 4.3- 4.4 mm. Venter: pro- and mesocoxae large, globular; prosternal process acute at apex, expanded behind procoxae. Leg: tibia broadly expanded at apex; pro- and mesotibiae toothed along apical margin; metatibia with row of stiff setae on apical margin; femur sparsely punctate. Total length: 10.1-11.3 mm.

Larva. (from Maulik 1931). Total length 9–13.5 mm. Total width 5.5–7.0 mm. Body flat, upper surface somewhat convex longitudinally; sides expanded into interlacing flaps which have a fringe of fine setae; ovoid. Head: covered from above by two overlapping expansions; epicranial lobes bifurcate; antennae well developed, three segmented; mandible tridentate; maxillary palps with two segments; labial palps with one segment; four ocelli placed near outer margin of each antenna; legs widely separated; spiracles visible from above, spiracle 8 larger than others. See Figure 9 .

Larval host plant. Wild banana ( Maulik 1931); Heliconia sp. (Heliconiaceae) ; Musa sp. (Musaceae) ( Maulik 1937). Adults have been collected on Heliconia sp. , H. curtispatha Peterson , H. imbricata (Kuntze) Baker , H. irrasa R.R. Sm. , H. latispatha Benth. , H. metallica Planch. & Linden , H. platystachys Baker , H. tortuosa Griggs , H. vaginalis Benth. , and H. wagneriana Peterson ( Strong 1977a, 1977b, 1983); H. cathaeta R. R. Sm. , Calathea latifolia Klotzsch , ( Marantaceae ) ( Meskins et al. 2008).

Comparative notes. This species can be distinguished by the rounded elytral apices, by the lateral margin of the pronotum not angulate in middle, and by antennomere 2 being cylindrical.

Distribution. Bolivia, Colombia, Costa Rica, Ecuador, French Guyana, Guatemala, Nicaragua, Panama.

Specimens examined. Bolivia. Beni: Cosinecho Regn. , viii.1925 ( USNM) ; Isiamas, xii (USNM); Rurrenabaque, x, xi (USNM). Colombia. ??: Pto. Berrie , 8.viii.1938 ( USNM) . Valle del Cauca: Lago Calima, 5 miles below dam, 1250 m, 24.iv.1996 ( FSCA) . Costa Rica. Alajuela: Angeles, R. B. Alberto Manuel Brenes, 900–1000 m ( INBio) ; Dos Rios, P. N. Guanacaste, 600–700 m ( INBio) ; 10 mi. N. Varablanca , 14.v.1967 ( FSCA) . Cartago: Aquiares nr. Santa Cruz , 9 km NW Turrialba, 16.v.1985 ( EMEC) ; Hacienda de Movaria de Chirripo , 7–10.vii.1969 ( LACM) ; Orori, P. N. Tapantí-Macizo de la Muerte, 1200–1300 m ( INBio) ; Santa Teresita, 1100–1200 m ( INBio) ; Tayutic, 1100–1200 m ( INBio) ; Turrialba , 13–14.viii.1968 ( FSCA) , 4–13.viii.1970 ( BPBM) . Guanacaste: Curubandé, P. N. Rincón de la Vieja, 800–900 m ( INBio) ; Mayorga, P. N. Guanacaste, 600–700 m ( INBio) ; Santa Cecilia, P. N. Guanacaste, 600–700 m ( INBio) ; Santa Elena, P. N. Guanacaste, 100–200 m ( INBio) ; Tierras Morenas, Z. P. Tenorio, 900–1000 m ( INBio) ; Tilaran , 7.vii.1972 ( FSCA) ; 3 mi west Tilaran ( USNM) . Heredia: Horquetas, 600–700 m ( INBio) ; Est. Biol. La Selva , various dates ( BYUC, FCSA, INBio, USNM) ; La Virgen, 0–100 m ( INBio) ; 11 km south La Virgen , 9.iv.2003 ( USNM) . Limón: Bratsi, R. I. Talamanca, 0–100 m ( INBio) ; Colorado, Tortuguero, 0 m (INBio); Hdas. La Suerte, Tapezco , 13–31.viii.1979 ( LACM) ; La Amistad Caribe, 0–100 m ( INBio) ; 7 miles north Guacimo , 22.ii–3.iii.1988 ( USNM) ; Hamburg Farm (USNM); Rita, 0–100 m ( INBio) ; Siquirres, 100–200 m, 14.viii.1970 ( BPBM) ; Valle La Estrella , R. B. Hitoy Cerere, 100–200 m ( INBio) . Puntarenas: Barranca near Puntarenas, 6.vii.1972 ( FSCA) ; Fca. Las Cruces, San Vito de Java , 27.vi.1969 ( USNM) ; 8.1 mi. W Esparta , 5.vi.1967 ( FSCA) ; 10.9 mi. east Esparta , 17.vi.1969 ( USNM) ; Guacimal, 1000–1100 m ( INBio) ; Jiménez, P. N. Corcovado, 0–100 m ( INBio) ; La Palma (USNM); Los Alturas , 22.v.1992 ( USNM) , 23–26.v.1992 ( USNM) ; Finca Las Cruces , 6 km S San Vito, 21/ 25.viii.1976 ( CASC) ; Los Alturas Biol. Stn. , 12.viii.1995 ( BYUC) ; Monteverde, various dates (INBio, USNM, CASC, EMEC, LACM); Pittier, P. N. La Amistad, 1700–1800 m ( INBio) ; 5.4 miles south Palmar Sur , 11.viii.1969 ( USNM) ; Potrero Grande, P. N. La Amistad, 1400–1500 m ( INBio) ; Barranca site, 10 km north Puntarenas, 17.vi.1969 ( USNM) ; Monteverde Cloud Forest Preserve, 20.vi.1984 ( BYUC) ; Puerto Cortes , 19.vii.1972 ( FSCA) ; Rincon , 18.ii.1966 ( PMNH) ; Rincon, Osa Peninsula , 27.vii.1972 ( FSCA) ; 3.5 miles south Rincon , 1.iii.1969 ( USNM) , 28.ii–12.iii.1969 ( CASC) ; Rincon Forest , 26.vi.1983 ( LACM) ; Rio Piedras , 15.viii.1969 ( USNM) ; San Vito-Neilly area , 13.viii.1969 ( USNM) ; Sierpe, R. F. Golfo Dulce, 200–300 m ( INBio) ; near Sirena, Osa Peninsula, 0–5 m, xii.1983 ( CMNH) ; Tárcoles, 0–100 m ( INBio) . San José: San Jose, vi.1927 ( USNM) ; San Pedro, 1200–1300 m ( INBio) . Ecuador. Carchi: San Gabriel, 750 m, 12.x.1970 ( BPBM) . Napo: Yasuni, 10–13.ciii.1998 ( USNM) ; road between E. Puyo & Pt. Nano, vii.1964 ( USNM) . Pichincha: Chimbo ( USNM) . Nicaragua. Matagalpa Department: Jinotega, 20.xi.1994 ( USNM) , 22.iii.1995, 9.vi.1995 ( CMN) ; 6 km north Matagalpa, Selva Negra Hotel ( USNM) . Panamá. Chiriquí: Barro Colorado Island ( USNM) ; Bugaba (USNM); Caldera , 31.v.1994 ( CMNH) ; Cerro Azul , 5.vi.1994 ( USNM) ; Vulcan de Chiriquí ( USNM) ; 11.2 km east Chiriquí, 30.v.1993 ( USNM) ; Continental Divide Trail (USNM); Fortuna , 17.v.1978 ( BYUC) , 19.v.1978, 26.v.1993 ( USNM) , 30.v.1994 ( CMNH) ; Hartmanns Finca , 4–7.vii.1997 ( FSCA, USNM, UGAC, EMEC) ; Santa Clara , 23–25.v.1980 ( USNM) . Coclé: El Valle, 14.vi.1967 ( USNM) , no date (USNM); Cerro Gaital , 28.v.1994 ( USNM) ; Gamboa (USNM); Limbo , 24.viii.1970 ( BPBM) ; Madden Forest ( USNM) . Colón: Porto Bello ( USNM) . Panamá: Cerro Azula, Los Altos , 24.v.1994 ( CMNH) ; Cerro Campana , 27.v.1994; Old Gamboa Road, 25.vi.1994 ( CMNH) ; Reserva Soberania, Pipeline Road (USNM); Pipeline Road K1-12, 8–9.vii.1997 ( EMEC) . San Blas: Nasagandi , 27–28.v.1995 ( BYUC) . Total: 1073.

Figures

FIGURE 9. Larva of Ch. bicolor (from Maulik 1931). 9a. Dorsal View. 9b. Venter view. 9c. Head (A= antenna; Ch= Chitinous reinforcements; Clp.= clypeus; Epcr.= Epicranium; Lb.= labium; Lbplp.= labial palps; Lc.= lacinia; Lm.= labrum; Md.= mandible; Mt.= mentum; Mx.= maxilla; Mxplp.= maxillary palps).

FIGURES 1–4. Habitus of Chelobasis species. 1. Ch. aemula. 2. Color variation in Ch. bicolor. 3. Ch. laevicollis. 4. Color variation in Ch. perplexa.

FIGURES 5–8. Elytral apices and antennae of Chelobasis species. 5a. Elytral apex of Ch. aemula. 5b. Antennae of Ch. aemula. 6a. Elytral apex of Ch. bicolor. 6b. Antennae of Ch. bicolor. 7. Elytral apex of Ch. laevicollis. 8a. Elytral apex of Ch. perplexa. 8b. Antennae of Ch. perplexa.