Ischnomera xanthoderes (Mulsant, 1858)

Bologna, Marco A., Poloni, Riccardo & Vázquez, Xavier A., 2019, A new Ischnomera of the I. xanthoderes (Mulsant, 1858) complex (Coleoptera Oedemeridae) from Sicily, Zootaxa 4671 (4), pp. 541-550 : 548-549

Key to the species of the I. xanthoderes complex

1 Claw with a distinct ventral tooth ( Fig. 2g , 3c ); aedeagus more curved and thicker ( Fig. 2e ); antennomeres I-II and palpomeres dark ventrally ( Portugal, Spain, S France)........................................................ xanthoderes

- Claw without a distinct ventral tooth; aedeagus more straight and slender; antennomere I-II and palpomeres ventrally dark or flavous............................................................................................. 2

2 Male antennomeres distinctly slender and cylindrical, especially VIII-X; antennomeres I-II flavous-brown ventrally; maxillary palpomeres I-II brown dorsally and I-III usually flavous-brown ventrally; pronotum punctures wider and not distinctly approached, intermediate surface shiny ( Fig. 4 ); elytral surface shiny and elytral apex in male more widely rounded; aedeagus elongate ( Figs. 1a , 2a ); parameres distinctly divergent and almost glabrous (Sicily)......................... sicula n.sp .

- Male antennomeres shorter, especially VIII-X, which are also slightly widened apically, I-II black ventrally; maxillary palpomeres I-II dark black dorsally and I-III black ventrally; pronotum punctures distinctly approached and surface subopaque ( Fig. 7a ); elytral surface subopaque and elytral apex in male not widely rounded; aedeagus slightly shorter ( Figs. 1b , 2c ); parameres less divergent and more pubescent ( Figs. 1d , 2d ) ( Morocco, N Algeria, N Tunisia)..................... tenietensis

Figures

FIG. 2. Male genitalia and claws: Ischnomera sicula n.sp., aedeagus (a), apical portion of tegmen (b); I. tenietensis, aedeagus (c), apical portion of tegmen (d); I. xanthoderes, aedeagus (e), apical portion of tegmen (f); I. tenietensis, tarsal claws (h); I. xanthoderes, tarsal claws (g). Figures of both I. xanthoderes and I. tenietensis modified from Svihla (1988).

FIG. 3. Tarsal claws: Ischnomera sicula n.sp. (a); I. tenietensis (b); I. xanthoderes (c).

FIG. 4. Ischnomera sicula n.sp., head and pronotum.

FIG. 1. Male genitalia: aedeagus of Ischnomera sicula n. sp. (a) and I. tenietensis (b); tegmen of I. sicula n.sp. (c) and I. tenietensis (d).

FIG. 7. Habitus: Ischnomera tenietensis (a), I. xanthoderes (b).