Key to adult species of the genus Coarazuphium

(modified from Bená & Vanin 2014)

1. Anophthalmous (Gnaspini et al. 1998: 307, fig.6). Maximum width of elytra near middle. Male genitalia: right paramere (Gnaspini et al. 1998: fig. 10) styliform, about as long as left paramere............. C. cessaima Gnaspini, Vanin & Godoy

1'. Microphthalmous. Maximum width of elytra near middle, or posterior middle. Male genitalia: right paramere styliform or not, distinctly shorter than left paramere.......................................................................2

2(1'). Elytron with apical margin truncate, not sinuate. Male right paramere styliform or broad.............................3

2'. Elytron with apical margin sinuate. Male right paramere broad, not styliform, distinctly shorter than left paramere.........8

3(2). Head dorsally without setae posterior to the anterior supraorbital setae (Pellegrini and Ferreira 2011: 49, fig.2A)..........4

3' Head dorsally with one to three pairs of setae posterior the anterior supraorbital setae............................... 6

4(3) Metafemur bearing a spine at the middle ventral side; antennae short, about 0.68 times of body length (Fig. 1 C)................................................................................................. C. spinifemur sp. n.

4`Metafemur without a spine at the middle ventral side; antennae long, reaching metafemur............................5

5(4`) Aedeagus very long and slender, about 2.89 times longer than left paremere (Pellegrini & Ferreira 2011: Figs. 2 C–E)............................................................................... C. tapiaguassu Pellegrini & Ferreira

5`Aedeagus shorter, about 2.6 times longer than left paremere (Fig. 6 B)............................ C. amazonicus sp. n.

6(3'). Male right paramere slender, styliform (Ball & Shpeley 2013: fig. 10C)................... C. whiteheadi Ball & Shpeley

6'. Male right paramere broad, not styliform (Fig. 19).......................................................... 7

7. Two pairs of prosternal setae (Álvares & Ferreira 2002: 42, fig.3). Maximum width of elytra posterior to the midline (Álvares & Ferreira 2002: 42, fig. 1)......................................................... C. pains Álvares & Ferreira

7' One pair of prosternal setae (Fig. 6). Maximum width of elytra near middle (Bená & Vanin 2014: Figs. 1 and 4)........................................................................................... C. ricardoi Bená & Vanin

8(2'). Head dorsally with three pairs of setae posteriad the anterior supraorbital setae....................................9

8'. Head dorsally with one or two pairs of setae posteriad the anterior supraorbital setae...............................10

9(8). Slight apical sinuosity of elytron (Pellegrini & Ferreira 2014: figs. 12A and 12C).......... C. formoso Pellegrini & Ferreira

9'. Pronounced apical sinuosity of elytron (Pelegrinni & Ferreira 2014: figs. 12B and 12D).... C. caatinga Pellegrini & Ferreira

10(8') Head dorsally with two pairs of setae (posterior suopraorbitals and occipitals) at posterior border of head capsule (Gnaspini et al. 1998: fig. 1.) Male left paramere broad, conchoid (Gnaspini et al. 1998: fig. 3)..... C. bezerra Gnaspini, Vanin & Godoy

10'. Single pair of setae (posterior supraorbitals) at posterior border of head capsule (Godoy & Vanin 1990: 796, fig. 1). Male left paramere styliform (Godoy & Vanin 1990: 798, fig. 2)................................... C. tessai (Godoy & Vanin)