Euphoria geminata Species-Group
publication ID |
https://doi.org/ 10.1649/0010-066X-66.mo4.1 |
DOI |
https://doi.org/10.5281/zenodo.7086936 |
persistent identifier |
https://treatment.plazi.org/id/F449F723-D565-B223-87E8-4370ECE7FBD3 |
treatment provided by |
Carolina |
scientific name |
Euphoria geminata Species-Group |
status |
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Euphoria geminata Species-Group
(Appendix 3: Plate 4a–o View Plate 4 )
Species in this group have a sinuate clypeal apex, antennal club sexually dimorphic in length (longer in males than in females), clypeal sides not strongly raised, pronotum frequently vittate, pronotal base vaguely to moderately emarginate in front of scutellum, mesometasternal process not strongly extended beyond the mesocoxae, protibiae sexually dimorphic (slender in males, robust in females, except in E. kernii ), meso- and metatarsal length sexually dimorphic (as long as or longer than metatibiae in males, shorter in females), and apex of the metatibiae moderately to strongly expanded in females. Many of the species in this group are highly similar in general appearance but are separated authoritatively using the characters provided in the key. The most useful characters for identification are the shape of the clypeus, punctation on the dorsum, and form of the male genitalia.
Euphoria kernii represents a challenge when trying to place it in a group as it possesses a combination of unique characters. The protibiae, aedeagal shape, and the mesometasternal process are similar to those found in species of the areata and discicollis species-groups. It also shows affinities with species in the pulchella species-group (elytral grooves, dorsal vestiture), but the clypeal shape, pronotal base, and geographic distribution suggest it would be better placed in the geminata species-group .
Composition. Ten species are included in this group: E. casselberryi Robinson , E. eximia Bates , E. geminata (Chevrolat) , E. hidrocalida Orozco , new species, E. humilis Blanchard , E. kernii Haldeman , E. mayita Orozco , new species, E. montana Orozco , new species, E. quadricollis Bates , and E. vittata Orozco , new species.
Natural History. The sexes are dimorphic in some of the species, suggesting different mating strategies than for some of the species in the other groups. The protibial teeth of the males of most species are frequently completely abraded, suggesting they may dig in the soil.
KEY TO THE SPECIES OF THE GEMINATA SPECIES- GROUP
(The males of E. hidrocalida are unknown.)
1. Elytral striae formed almost exclusively by deeply impressed grooves. Dorsal surface never tomentous ( Fig. 44a, d, e View Fig ). Parameres as in Fig. 44c View Fig .......................... ................... E. kernii Haldeman (p. 79)
1′. Elytral striae not as above. Dorsal surface tomentous to shiny. Parameres not as in Fig. 44c View Fig ...................................................2
2(1′). Metasternum variably covered by whitish, cretaceous markings. Elytra frequently with long, black band on costae ( Fig. 41a, d View Fig ). Dorsum tomentous....................................... ............... E. geminata (Chevrolat) (p. 76)
2′. Metasternum without cretaceous markings. Elytra never with long, black band on costae. Dorsum tomentous or shiny......3
3(2′). Abdomen in lateral view flat to weakly concave (males)......................................4
3′. Abdomen in lateral view strongly convex (females) ...............................................10
4(3). Antennal club twice as long as stem. Pronotum and pygidium with cretaceous markings ( Fig. 40a View Fig ) ................................. ......................... E. eximia Bates (p. 75)
4′. Antennal club less than twice as long as stem. Pronotum and pygidium without cretaceous markings...............................5
5(4′). Elytral strial punctation well defined, with long grooves or double grooves............6
5′. Elytral strial punctation weakly defined, without long grooves or double grooves................................................................7
6(5). Clypeus as in Fig. 43b View Fig . Parameres as in Fig. 43c View Fig .... E. humilis Blanchard (p. 78)
6′. Clypeus as in Fig. 48b View Fig . Parameres as in Fig. 48c View Fig ..................................................... .... E. vittata Orozco , new species (p. 84)
7(5′). Protibial teeth strongly oblique to tibial shaft. Clypeus as in Fig. 45b View Fig . Parameres as in Fig. 45c View Fig ............................................ ....... E. mayita Orozco , new species (p. 81)
7′. Protibial teeth perpendicular to tibial shaft. Clypeus not as in Fig. 45b View Fig . Genitalia not as in Fig. 45c View Fig ............................................ 8 View Fig
8(7′). Scutellum black or with black margin. Clypeus as in Fig. 39b View Fig ............................. ........... E. casselberryi Robinson (p. 74)
8′. Scutellum entirely yellowish brown. Clypeus not as in Fig. 39b View Fig ...................... 9
9(8′). Clypeus as in Fig. 47b View Fig . Parameres as in Fig. 47c View Fig ..... E. quadricollis Bates (p. 83)
9′. Clypeus as in Fig. 46b View Fig . Parameres as in Fig. 46c View Fig .................. E. montana Orozco , new species (p. 82)
10(3′). Body length <10 mm ( Fig. 42a View Fig ).............. ........................... E. hidrocalida Orozco , new species (p. 77)
10′. Body length> 10 mm ........................... 11
11(10′). Pronotum shiny....................................12
11′. Pronotum tomentous or partially tomentous ................................................................... 15
12(11). Scutellum densely punctate. Clypeus as in Fig. 39b View Fig ................................................ ........... E. casselberryi Robinson (p. 74)
12′. Scutellum impunctate or sparsely punctate. Clypeus not as Fig. 39b View Fig ............... 13 View Fig
13(12′). Elytral striae with long grooves or double grooves .... E. humilis Blanchard (p. 78)
13′. Elytral striae without long grooves or double grooves ........................................ 14
14(13′). Pronotal base impunctate. Clypeus as in Fig. 47b View Fig ........ E. quadricollis Bates (p. 83)
14′. Pronotum punctate at base. Clypeus as in Fig. 40b View Fig ............ E. eximia Bates (p. 75)
15(11′). Pygidial apex light-colored. Clypeus as in Fig. 46b View Fig ................. E. montana Orozco , new species (p. 82)
15′. Pygidial apex same color as rest of pygidium. Clypeus not as Fig. 46b View Fig ......................... 16
16(15′). Clypeus as in Fig. 48b View Fig ............................. .... E. vittata Orozco , new species (p. 84)
16′. Clypeus as in Fig. 45b View Fig ............................. ....... E. mayita Orozco , new species (p. 81)
CLAVE PARA LAS ESPECIES DEL GRUPO GEMINATA
(Los machos de E. hidrocalida son desconocidos.)
1. Estrías elitrales formadas casi exclusivamente por surcos profundos. Superficie dorsal nunca tomentosa ( Fig. 44a, d, e View Fig ). Parámeros como en la Fig. 44c View Fig ..................................... ....................... E. kernii Haldeman (p. 79)
1′. Estrías elitrales no como en la anterior. Superficie dorsal tomentosa o brillante. Parámeros no como en la Fig. 44c View Fig ........2
2(1′). Metasterno parcial o totalmente cubierto por máculas cretáceas blanquecinas. Élitros frecuentemente con bandas largas y negras sobre las costas ( Fig.41a, d View Fig ). Dorso tomentoso ................ E. geminata (Chevrolat) (p. 76)
2′. Metasterno sin máculas cretáceas. Élitros sin bandas largas y negras sobre las costas. Dorso tomentoso o brillante.................... 3
3(2′). Abdomen plano o ligeramente cóncavo en vista lateral (machos)........................4
3′. Abdomen fuertemente convexo en vista lateral (hembras)...................................10
4(3). Maza antenal 2 veces más larga que el resto de los segmentos antenales. Pronoto y pigídio con máculas cretáceas ( Fig. 40a View Fig ) ........................... E. eximia Bates (p. 75)
4′. Maza antenal menos de 2 veces mas larga que el resto de los segmentos antenales. Pronoto y pigídio sin máculas cretáceas ............... 5
5(4′). Punteaduras estriales elitrales bien definidas, con surcos largos o dobles......................... 6
5′. Punteaduras estriales elitrales levemente definidas, sin surcos de ningún tipo......7
6(5). Clípeo como en la Fig. 43b View Fig . Parámeros como en la Fig. 43c View Fig ................................. ................. E. humilis Blanchard (p. 78)
6′. Clípeo como en la Fig. 48b View Fig . Parámeros como en la Fig. 48c View Fig ..... E. vittata Orozco , nueva especie (p. 84)
7(5′). Dientes protibiales fuertemente oblicuos a la tibia. Clípeo como en la Fig. 45b View Fig . Parámeros como en la Fig. 45c View Fig ..................... .... E. mayita Orozco , nueva especie (p. 81)
7′. Dientes protibiales perpendiculares a la tibia. Clípeo no como en la Fig. 45b View Fig . Parámeros no como en la Fig. 45c View Fig ........ 8 View Fig
8(7′). Escutelo negro o con margen negro. Clípeo como en la Fig. 39b View Fig ................................... ............. E. casselberryi Robinson (p. 74)
8′. Escutelo café-amarillento. Clípeo no como en la Fig. 39b View Fig ............................................9
9(8′). Clípeo como en la Fig. 47b View Fig . Parámeros como en la Fig. 47c View Fig ................................. .................. E. quadricollis Bates (p. 83)
9′. Clípeo como en la Fig. 46b View Fig . Parámeros como en la Fig. 46c View Fig .............. E. montana Orozco , nueva especie (p. 82)
10(3′). Longitud corporal <10 mm ( Fig. 42a View Fig )..... ........................... E. hidrocalida Orozco , nueva especie (p. 77)
10′. Longitud corporal> 10 mm ..................11
11(10′). Pronoto brillante...................................12
11′. Pronoto parcial o completamente tomentoso ................................................................... 15
12(11). Escutelo densamente punteado. Clípeo como en la Fig. 39b View Fig ................................. ........... E. casselberryi Robinson (p. 74)
12′. Escutelo sin punteaduras o con punteaduras dispersas. Clípeo no como en la Fig. 39b View Fig ................................................................... 13
13(12′). Estrías elitrales con surcos largos o dobles .................. E. humilis Blanchard (p. 78)
13′. Estrías elitrales sin surcos largos o dobles..............................................................14
14(13′). Pronoto sin punteaduras en la base. Clípeo como en la Fig. 47b View Fig ................................... .................... E. quadricollis Bates (p. 83)
14′. Pronoto con punteaduras en la base. Clípeo como en la Fig. 40b View Fig ..................................... .............................. E. eximia Bates (p. 75)
15(11′). Ápice del pigídio con tonalidad más clara que el resto del pigídio. Clípeo como en la Fig. 46b View Fig ................. E. montana Orozco , nueva especie (p. 82)
15′. Ápice del pigídio del mismo color que el resto del pigídio. Clípeo no como en la Fig. 46b View Fig ................................................ 16
16(15′). Clípeo como en la Fig. 48b View Fig ..................... ..... E. vittata Orozco , nueva especie (p. 84)
16′. Clípeo como en la Fig. 45b View Fig ..... E. mayita Orozco , nueva especie (p. 81)
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