Euphoria biguttata Species-Group

Orozco, Jesús, 2012, Monographic Revision of the American Genus Euphoria Burmeister, 1842 (Coleoptera: Scarabaeidae: Cetoniinae), The Coleopterists Bulletin (mo 11) 66, pp. 1-182 : 16-17

Euphoria biguttata Species-Group

(Appendix 3: Plate 1a–e )

Species in the biguttata species-group are distinguished by having the clypeal apex and sides not raised, clypeal sides moderately to strongly convergent anteriorly, antennal club subequal in length in both sexes, scutellum impunctate, abdomen subequal in shape in both sexes, and form of the parameres.

Composition. Three species are included in this group: E. biguttata (Gory and Percheron) , E. canescens (Gory and Percheron) , and E. dimidiata (Gory and Percheron) .

Natural History. All species in the group are known to use Atta sp. ( Hymenoptera : Formicidae ) debris piles in the larval stage.

KEY TO THE SPECIES OF THE BIGUTTATA SPECIES- GROUP

1. Clypeus strongly attenuate ( Fig. 3b ) .............. ..... E. canescens (Gory and Percheron) (p. 19)

1′. Clypeus weakly to moderately attenuate ( Figs. 2b , 4b )................................................2

2. Base of pronotum in front of scutellum strongly emarginate. Mesometasternal process extending anteriorly well beyond mesocoxae. Cretaceous markings on elytra generally large ( Fig. 2a, d ) ... E. biguttata (Gory and Percheron) (p. 17)

2′. Base of pronotum in front of scutellum weakly to moderately emarginate. Mesometasternal process extending anteriorly to same level as mesocoxae or only slightly beyond. Cretaceous markings on elytra absent or small ( Fig. 4a, d ) ..... E. dimidiata (Gory and Percheron) (p. 20)

C LAVE PARA LAS E SPECIES DEL G RUPO BIGUTTATA

1. Clípeo fuertemente atenuado ( Fig. 3b ) ......... .... E. canescens (Gory y Percheron) (p. 19)

1′. Clípeo ligera a moderadamente atenuado ( Figs. 2b , 4b )..............................................2

2. Base del pronoto en frente del escutelo fuertemente emarginada. Proceso mesometasternal extendiéndose anteriormente mucho más allá de las mesocoxas. Máculas cretáceas elitrales generalmente grandes ( Fig. 2a, d ) ................................................... .... E. biguttata (Gory y Percheron) (p. 17)

2′. Base del pronoto en frente del escutelo ligera a moderadamente emarginada. Proceso mesometasternal extendiéndose anteriormente al mismo nivel de las mesocoxas o ligeramente más allá. Máculas cretáceas elitrales pequeñas o ausentes ( Fig. 4a, d ) .................................... ...... E. dimidiata (Gory y Percheron) (p. 20)

Figures

Plate 1. Euphoria species. biguttata species-group: a, b) E. biguttata, c, d) E. canescens, e) E. dimidiata. histrionica species-group: f) E. devulsa, g) E. histrionica, h) E. levinotata, i) E. sonorae, j) E. subtomentosa. sepulcralis speciesgroup: k) E. boliviensis, l, m) E. leucographa, n) E. lurida, o, p) E. sepulcralis, q, r) E. yucateca. fulgida species-group: s, t) E. fulgida, u, v, w) E. limbalis, x, y) E. monticola.

Fig. 3. Euphoria canescens. a) Habitus, b) Head, c) Parameres, d) Color variation, e) Temporal distribution, f) Geographic distribution in Belize, El Salvador, Guatemala, Honduras, Mexico, and the United States; open square indicates country record only.

Fig. 2. Euphoria biguttata. a) Habitus, b) Head, c) Parameres, d) Color variation, e) Temporal distribution, f) Geographic distribution in El Salvador, Guatemala, Honduras, and Mexico.

Fig. 4. Euphoria dimidiata. a) Habitus, b) Head, c) Parameres, d) Color variation, e) Temporal distribution, f) Geographic distribution in El Salvador, Guatemala, Honduras, and Mexico; open square indicates state record only.