Agrilinellus, Dellacasa & Dellacasa & Gordon, 2008

Dellacasa, Marco, Dellacasa, Giovanni & Gordon, Robert D., 2008, Agrilinellus, new genus and four new species of Mexican Aphodiini (Scarabaeoidea: Scarabaeidae: Aphodiinae), Insecta Mundi 2008 (53), pp. 1-16 : 4

Key to species of Agrilinellus

1. Elytral striae extremely fine, superficial, faintly punctured, not crenulate; intervals almost imperceptibly punctured ( Fig. 43 ). Shiny black. Length 5.0- 5.5 mm. Mexico (Michoacán) ....... ...................................................................................................................... A. abbonai n. sp.

— Elytral striae wide, more or less deep, distinctly punctured, more or less strongly crenulated. 2

2(1). Shape oval, moderately convex ( Fig. 8 , 11 , 23 , 44-46 ); humerus denticulate or subdenticulate .. .................................................................................................................................................. 3

— Shape subcylindrical, strongly convex ( Fig. 24 , 35, 40 ); humerus not denticulate ..................... 5

3(2). Pronotum coarsely, densely, irregularly punctured, punctures dual; elytral intervals biseriately coarsely somewhat irregularly punctured on each side; punctures with short recumbent hairs ( Fig. 44 ). Reddish brown, elytra yellowish with brownish spots variously arranged. Length 4.0- 5.0 mm. Mexico (Oaxaca) ..................................................................... A. oaxacaensis n. sp.

— Pronotum subregularly sparsely punctured; punctures even or dual; elytral intervals more or less densely, not coarsely punctured, minutely pubescent on preapical declivity only ( Fig. 45-46 ) ................................................................................................................................................... 4

4(3). Pronotum dually punctured, basal border always entire; clypeus obtusely angulate at side of median sinuosity ( Fig. 45 ). Piceous; sometimes sides of pronotum more or less widely testaceous and elytra yellowish with several blackish spots variously scattered and/or broadened. Length 4.0-5.0 mm. Mexico (Guerrero, Hidalgo, México, Oaxaca, Puebla, Tabasco, Veracruz), Guatemala................................................................................................................... A. azteca (Harold)

— Pronotum simply punctured, basal border sometimes interrupted at middle; clypeus widely rounded at sides of median sinuosity ( Fig. 46 ). Testaceous; head medially, pronotal disc and some variously scattered elytral spots piceous. Length 3.5-4.5 mm. Mexico (Chiapas); El Salvador (Metapán) .......................................................................................... A. chiapasensis (Galante, et al.)

5(2). Elytral intervals strongly alutaceous, thus almost dull, coarsely, densely, somewhat irregularly punctured ( Fig. 49 ), distinctly pubescent mostly laterally and on preapical declivity; pronotum alutaceous, moderately shiny, dually, densely punctured. Blackish brown, sometimes elytra reddish-brown. Length 3.0- 3.5 mm. Mexico (Michoacán, México) ......... A. antonioreyi n. sp.

— Elytral intervals superficially alutaceous or shiny, sparsely punctured ( Fig. 47-48 ), nearly imperceptibly pubescent preapically; pronotum shiny, sparsely punctured ........................... 6

6(5). Elytral striae deep, strongly crenulate; larger pronotal punctures umbilicate ( Fig. 47 ). Blackish; elytra dark reddish. Length 3.0- 3.5 mm. Mexico (Nuevo León) .................... A. nuriae n. sp.

— Elytral striae not so deep and not so strongly crenulate; larger pronotal punctures not umbilicate ( Fig. 48 ). Blackish; sometimes elytra more or less widely testaceous or with several yellowish spots variously scattered and more or less widened. Length 3.0-4.0 mm. Mexico (Durango, Hidalgo, México, Michoacán, Puebla, Veracruz) .................................. A. ornatus (Schmidt)

Figures

Figure 43-46. Agrilinellus spp., dorsal habitus. 43) A. abbonai new species (S. Pedro Jácuaro, Michoacán, Mexico). 44) A. oaxacaensis new species (Guelatao env., Oaxaca, Mexico). 45) A. azteca (Harold, 1863) (caminoex. a Potrero Nuevo, Cuiyachapa, Veracruz, Mexico). 46) A. chiapasensis (Galante et al., 2003) (Monte Cristo, 23 Km N Metapán, El Salvador).

Figure 1-10. Agrilinellus abbonai new species. (Los Azufres, Laguna Larga, Michoacán, Mexico). 1) Epipharynx. 2) Habitus. 3) Habitus of male (morphological details). 4-5) Aedeagus (dorsal and lateral view). Agrilinellus chiapasensis (Galante et al., 2003) (Monte Cristo, m 2300, 23 Km N Metapán, El Salvador). 6-7) Aedeagus (dorsal and lateral view). 8) Habitus of female (morphological details). 9) Habitus. 10) Epipharynx.

Figure 11-20. Agrilinellus azteca (Harold, 1863) (Cruz Blanca, Veracruz, Mexico). 11) Habitus of male (morphological details). 12-17) Color variation. 18) Epipharynx. 19-20) Aedeagus (dorsal and lateral view).

Figure 21-32. Agrilinellus oaxacaensis new species [9.5 mi E of Oaxaca, (Km 80 Rt 175), Oaxaca, Mexico]. 21) Epipharynx. 22) Habitus. 23) Habitus of female (morphological details). Agrilinellus ornatus (Schmidt, 1911) (Cuiyachapa, Mpio. Coscomatepec, Veracruz, Mexico). 24) Habitus of male (morphological details). 25-29) Color variation. 30-31) Aedeagus (dorsal and lateral view). 32) Epipharynx.

Figure 33-42. Agrilinellus nuriae new species (Cerro El Potosí, Nuevo León, Mexico). 33) Epipharynx. 34) Habitus. 35) Habitus of male (morphological details). 36-37) Aedeagus (dorsal and lateral view). Agrilinellus antonioreyi new species (rd Mex 41 Patzcuaro-Tacámbaro, Sta. Clara del Cobre env., Michoacán, Mexico). 38-39) Aedeagus (dorsal and lateral view). 40) Habitus of male (morphological details). 41) Habitus. 42) Epipharynx.

Figure 47-49. Agrilinellus spp., dorsal habitus. 47) A. nuriae new species (Cerro El Potosí, Nuevo León, Mexico). 48) A. ornatus (Schmidt, 1911) (Cuiyachapa, Veracruz, Mexico). 49) A. antonioreyi new species (Centro Ceremonial Otomi env., México, Mexico).