Cotithene

Franz, Nico M., 2008, Revision, phylogeny and natural history of Cotithene Vo s s (Coleoptera: Curculionidae), Zootaxa 1782, pp. 1-33 : 7-8

Key to the species of Cotithene

1. Length 2.7–3.4 mm; rostrum of male in lateral view widest near basal 2/5 (e.g., Fig. 5 A), pronotum slightly convex (e.g., Fig. 2 B); procoxal cavities in female narrowly separated by narrow septum.......2

1'. Length 4.4–6.1 mm; rostrum of male in lateral view widest near apical 2/5 (e.g., Fig. 8 A), pronotum strongly expanded (e.g., Fig. 1 B); procoxal cavities in female separated by about width of antennal club..................................................................................................................................................................3

2(1). Head of male dorsally without any projections or long, suberect setae ( Fig. 5 A); spermatheca C-shaped, without projection on outer margin at point of deflection ( Fig. 9 A) ..................... C. dicranopygia sp. n.

2'. Head of male dorsally with convex elevation, three triangular projections and long, suberect setae ( Fig. 5 B); spermatheca J-shaped, with small, narrowly convex projection on outer margin near point of deflection ( Fig. 9 B) .................................................................................................. C. stratiotricha sp. n.

3(1'). Head of male dorsally without projections or longer setae, anterodorsal region rugulose, prosternum without small obtuse elevation anteriorly of each procoxal cavity, aedeagus with subapical constriction ( Figs. 10 A,B); rostrum of female 1.7–2.1x longer than pronotum, (very) narrow, arcuate, scape not reaching eye, rostrum-head transition in lateral view slightly concave ( Figs. 6 B, 7B)...........................4

3'. Head of male with small, posterior, triangular projection and longer, suberect setae, anterodorsal region slightly convex, prosternum with small obtuse elevation anteriorly of each procoxal cavity, aedeagus apically continuously narrowed (e.g., Figs. 11 , 12 ); rostrum of female 0.9–1.1 x as long as pronotum, narrow, slightly arcuate, scape reaching anterior margin of eye, rostrum-head transition in lateral view evenly convex ( Fig. 8 B)...........................................................................................................................5

4(3). Pronotum light reddish-brown, elytra darker reddish-brown, sclerites of aedeagus ventrally expanded at apex, irregular, undulate ( Fig. 10 A); rostrum of female 2.0–2.1x as long as pronotum, very narrow ( Fig. 6 B) ......................................................................................................................... C. leptorhamphis sp. n.

4'. Pronotum yellowish-brown, elytra dark brown, apex of aedeagal sclerites ventrally narrowed, acute

( Fig. 10 B); rostrum of female 1.7x as long as pronotum, narrow ( Fig. 7 B) .................... C. trigaea sp. n. 5(3'). Pronotum light reddish-brown, elytra dark reddish-brown; internal sac of aedeagus without ventral, subquadrate to annulate structure ( Fig. 11 ); spermatheca slightly constricted near apical 3/5 ( Fig. 11 ) ... .................................................................................................................................. C. globulicollis Vo s s

5'. Pronotum nearly orange, elytra dark reddish-brown to black; internal sac of aedeagus with ventral, subquadrate to annulate structure ( Figs. 12 A, 12B); spermatheca apically gradually narrowed ( Figs. 12 A, 12B)...........................................................................................................................................................6

6(5'). Rostrum of male without basal impression, head dorsally with sparse, long, recurvate setation, internal sac of aedeagus ventrally with complex, annulate structure ( Fig. 12 A); female with posterior margins of furcal arms of sternum VIII obliquely truncate, spermatheca J-shaped ( Fig. 12 A); Costa Rica............... ................................................................................................................................ C. anaphalanta sp. n.

6'. Rostrum of male with slight, basal impression, head dorsally with dense, long, recurvate, anteromedially directed setation, internal sac of aedeagus ventrally with irregular, subquadrate structure ( Fig. 12 B); female with posterior margins of furcal arms of sternum VIII evenly rounded, spermatheca Cshaped ( Fig. 12 B); Venezuela.................................................................................. C. melanoptera sp. n.

Figures

FIGURE 1. Dorsal habitus of Cotithene, males. A, C. dicranopygia; B, C. globulicollis.

FIGURE 2. Habitus of Cotithene stratiotricha. A, male, dorsal view; B, male, lateral view; C, female, dorsal view; D, female, lateral view.

FIGURE 5. Rostrum and head of Cotithene males, lateral view. A, C. dicranopygia; B, C. stratiotricha.

FIGURE 6. Rostrum and head of Cotithene leptorhamphis, lateral view. A, male; B, female.

FIGURE 7. Rostrum and head of Cotithene trigaea, lateral view. A, male; B, female.

FIGURE 8. Rostrum and head of Cotithene globulicollis, lateral view. A, male; B, female.

FIGURE 9. Genital structures of Cotithene species, from left to right: aedeagus, ventral view; aedeagus, lateral view; posterior region of female sternum VIII, ventral view; spermatheca, lateral view; shaded areas depicting structures of the internal sac. A, C. dicranopygia; B, C. stratiotricha.

FIGURE 10. Genital structures of Cotithene species, from left to right: aedeagus, ventral view; aedeagus, lateral view; posterior region of female sternum VIII, ventral view; spermatheca, lateral view; shaded areas depicting structures of the internal sac; synapomorphic character states 31 (1) labelled. A, C. leptorhamphis; B, C. trigaea.

FIGURE 11. Genital structures of Cotithene globulicollis, from left to right: aedeagus, ventral view; aedeagus, lateral view; posterior region of female sternum VIII, ventral view; spermatheca, lateral view; shaded areas depicting structures of the internal sac.

FIGURE 12. Genital structures of Cotithene species, from left to right: aedeagus, ventral view; aedeagus, lateral view; posterior region of female sternum VIII, ventral view; spermatheca, lateral view; shaded areas depicting structures of the internal sac; synapomorphic character states 32 (1) labelled. A, C. anaphalanta; B, C. melanoptera.