Revision of the Malagasy genusNesiotusGuillebeau (Coleoptera: Phalacridae) Author Gimmel, Matthew L. text The Coleopterists Bulletin 2013 2013-06-30 67 2 123 132 http://dx.doi.org/10.1649/0010-065x-67.2.123 journal article 10.1649/0010-065X-67.2.123 5367693 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 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. 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