Nesiotus, GUILLEBEAU

Gimmel, Matthew L., 2013, Revision of the Malagasy genusNesiotusGuillebeau (Coleoptera: Phalacridae), The Coleopterists Bulletin 67 (2), pp. 123-132 : 123-132

KEY TO SPECIES OF NESIOTUS GUILLEBEAU

NOTE: Many undescribed species are anticipated; see discussion section below. Aedeagi should always be examined for definitive identification.

1. Male antennomere XI distinctly longer than IX and X together ( Fig. 2 ); dorsal color dark brown with basal reddish patches on elytra ( Fig. 20 ); aedeagus as in Figs. 6, 13 ............. ................................ N. basalis , new species

1′. Male antennomere XI about as long as or shorter than IX and X together ( Figs. 3–4 ); dorsal color more or less uniform ( Figs. 21–26 ) ............................................................................ 2

2. Eyes large, separated by about width of a single eye in frontal view ( Fig. 32); aedeagus as in Figs. 10, 17 ... N. ocularis , new species

2′. Eyes smaller, separated by at least 1.5 times width of a single eye in frontal view...........3

3. Microsetae in elytral interval in 1 row (sometimes slightly irregular).................................4

3′. Microsetae in elytral interval in 2 irregular rows...............................................................5

4. Average size slightly larger (1.8 mm); tegmen with fused parameres about as wide as long ( Fig. 16 ); penis as in Fig. 9 ............................ ................................. N. nocitus , new species

4′. Average size slightly smaller (1.5 mm); tegmen with fused parameres much longer than wide ( Fig. 19 ); penis as in Fig. 12 ........ ................................. N. steineri , new species

5. Tegmen broadly rounded at apex ( Fig. 14 ); penis sharply pointed at apex ( Fig. 7 ) ........... ................................... N. fisheri , new species

5′. Tegmen pointed at apex ( Figs. 15, 18 ); penis narrowly rounded at apex ( Figs. 8, 11 )........5

6. Penis parallel-sided ( Fig. 8 ); tegmen as in Fig. 15 ....... N. joebranhami , new species

6′. Penis distinctly wider subbasally ( Fig. 11 ); tegmen as in Fig. 18 ....................................... ................................ N. olibroides Guillebeau

Figures

Figs. 1–5. Characters of Nesiotus species. Meso- and metaventrite: 1) N. basalis. Antenna: 2) N. basalis; 3) N. nocitus;

Figs. 20–27. Dorsal habitus and type labels of Nesiotus species. Dorsal habitus: 20) N. basalis; 21) N. fisheri; 22) N. joebranhami; 23) N. nocitus; 24) N. ocularis; 25) N. steineri; 26) N. olibroides, lectotype. All habitus images to same scale. Labels: 27) N. olibroides, lectotype.

Figs. 6–19. Aedeagal sclerites of Nesiotus species. Penis: 6) N. basalis; 7) N. fisheri; 8) N. joebranhami; 9) N. nocitus; 10) N. ocularis; 11) N. olibroides; 12) N. steineri. Tegmen:13) N. basalis; 14) N. fisheri; 15) N. joebranhami; 16) N. nocitus; 17) N. ocularis; 18) N. olibroides; 19) N. steineri. Scale bar = 0.1 mm.