Ogdoecosta juvenca (Boheman 1854)

(Figs 12 A–G)

Chelymorpha juvenca Boheman 1854:84

Male. Length 7.7–10.2 mm, width 6–8 mm (n=10). Black, pubescent.

HEAD. Surface black, rugose, supraorbital area punctate; frons with scattered long setae. Prosternum smooth, pubescent. Genal surface with punctures and short setae. Interocular width 2 times diameter of eyes. Antennae short reaching pronotal base; antennomere III longer than IV, antennomere I shorter than XI. Clypeus subtrapezoidal in shape, over 2 times wider than long, surface with sparse punctures and scattered setae, Labrum over 3 times wider than long; surface smooth.

THORAX. Pronotum 2–3 times wider than long; surface pubescent, black; anterior margin emarginated, margination U-shaped; base sinuous; hind angles sharp and produced behind with fine punctures; explanate margin with coarse punctures; pronotal disc with distinctive longitudinal groove. Scutellum triangular, surface smooth, black. Elytral surface pubescent, black with variable orange spots; elytron with four, two or no spots (Figs 12 F–G); punctures moderately coarse; humeri rounded, surface pubescent, punctate, black. Prosternal process pubescent, grooved at base, apex rounded. Mesosternal process deeply notched.

ABDOMEN. Ventrites surface pubescent, black. Aedeagus length less than 2 mm, apex acute (Fig. 20 C).

Female. Similar to male. Length 11–12.5 mm, width 7.5–8 mm (n=15). Interocular width 2 times diameter of eyes. Clypeus over 2 times wider than long. Labrum over 3 times wider than long. Pronotum 2–3 times wider than long. Spermatheca partially sclerotized (Fig. 20 C), less than 2 times longer than wide; apex acute, with velum; spermathecal duct weakly coiled.

Comparative note. This species is distinguished from O. epilachnoides by its sub-trapezoidal clypeus, the pronotal groove, the elytra pubescent, and spermathecal duct weakly coiled (Fig. 20 C).

Remarks. Champion (1893:154) mentioned that O. juvenca was “apparently peculiar to the eastern and southern part of Mexico” but we recorded it in the central-north of Mexico (San Luis Potosí).

Chelymorpha cruxnigra Boheman (Fig. 13 A–C) has been considered as a synonym of O. juvenca (Borowiec & Świętojańska 2016) . Based on his text, Champion (1893:155) saw a specimen in the BMNH’s Hamlet Clark Collection (“doubtless the type ”) which he considered as a variety of O. juvenca . However, the type specimen (Fig. 13 A–C) from BMNH has the diagnostic characters of Chelymorpha —an antennal groove and a deep groove on the prosternal process. Thus, Sekerka (2016) has restored its species status in Chelymorpha; however, we have examined the specimens deposited in the Manchester Museum determined by Spaeth as O. juvenca var. cruxnigra and we have determined that these specimens belong to the genus Ogdoecosta .

Host plant. Unknown.

Known distribution. México: Hidalgo, Oaxaca, and Veracruz . Costa Rica: Cartago (Borowiec & Świętojańska 2016).

Type material examined. Lectotype (des. L. Borowiec) (NHRS) ( Figs 12 A–C). México, No locality . Paralectotype (IZPAS) (Fig. 12 D–E). México, No locality.

Additional material examined. 59 specimens with the following localities:

México: San Luis Potosí *: 5 mi. W Xilitla, 2400 ft., 22.VIII.1954, Universidad of Kansas Expedition (KSBS, 1); 8 mi. W Xilitla, 3200 ft., 22.VII.1954, Universidad of Kansas Expedition (KSBS, 3) . Hidalgo: 4 Km. N Chapulhuacan, 2800 ft., 8.VIII.1967, H.R. Burker & J.Hafernik (TAMU, 1) . Morelos *: 2 mi. S Cuernavaca, 8.VII.1962, D. H. Janzen (EMEC, 1) . Puebla *: Necaxa–Tenango, 4400 ft., 1.VII.1994, G. Ortega & G. Barrera (CNIN, 1); Xilotepec de Juárez, La Unión, 14.XI.2008, H. Brailovsky (CNIN, 1); Huachinango, coll. F. C. Bowdich (MCZ, 1) . Oaxaca: Dominguillo, 19.VII.1998, A. Soria (CNIN, 2 females, 1); San Pedrito, Chico Zapote, 20.VI.1998, S. Zaragoza (CNIN 4 females) ; Sierra Mazateca, Loma de la Plaza, 18º 03' 19.18'', 96º 44' 18.98'', 1726 msnm, 25.VI.2010, H. Alvares García (CNIN, 1); Somellin (CNIN, 1 male, 1 female) ; Gorhan coll., Hoege (NMNH, 1); Tomellin, IV.1899, F . A. Eddy coll., B.R. (MCZ, 7). Veracruz: Estación biológica Los Tuxtlas, 5.IV.1985, A. Ibarra (CNIN, 2 females, 3); Estación biológica Los Tuxtlas, 13.II.1985, E. Ramírez (CNIN, 1 female) ; Estación biológica Los Tuxtlas, 26.IV.1985, E. Ramírez (CNIN, 2 females, 1); Estación biológica Los Tuxtlas, 26.IV.1985, P. Sinaca (CNIN, 1 female) ; Estación biológica Los Tuxtlas, 26–27.IV.1985, C. Mayorga (CNIN, 1 female) ; Estación biológica Los Tuxtlas, camino a la Laguna Escondida, 8.IV.1990, C. Mayorga & G. Ortega (CNIN, 1); Estación biológica Los Tuxtlas, camino a la Laguna Escondida, 24.III.1991, C. Mayorga & G. Ortega (CNIN, 1 female, 5); Estación biológica Los Tuxtlas, camino a Monte Pio, 4/VIII/1991, C. Mayorga & G. Ortega (CNIN, 1); Estación biológica Los Tuxtlas, camino a Monte Pio, 8.IV.1990, C. Mayorga & G. Ortega (CNIN, 2); Catemaco, 17.IV.1957, (CNIN, 1); Cerro El Vigía, Santiago Tuxtla, 14.IX.1966, (CNIN, 1); Coatepec, (CNIN, 1); Las Margaritas, 6.VIII.1994, S. Zaragoza (CNIN, 1); Los Tuxtlas, 11.XI.1985, A. Ibarra & P. Sinaca (CNIN, 1 female) ; Los Tuxtlas, 11.XI.1985, A. Ibarra, P. Sinaca & E. Ramírez (CNIN, 1 male) ; 1 mi. E Córdoba, 27.VI.1962, D. H. Janzen (EMEC, 1), 3 mi. W Fortín Las Flores, 19.VIII.1965, A. Paske (EMEC, 1); San Rafael, Jicaltepec, 3.V.1896 (MCZ, 1); Córdoba, 7.VI.1966, M. R & R. C J. S. Buckett coll (EMEC, 1); Fortín de las Flores, Motel Posada Loma, 900 msnm, 30.III.1977, ex. Roy O . Kendall coll., Roy O. Kendall & C. A. Kendall (TAMU, 1). Chiapas *: km. 125 Teapa-Tuxtla Gutiérrez, 8.VII.1985, F. Arias (CNIN, 1).