Gyrophaena nitidula (Gyllenhal, 1810)

Enushchenko, Ilya V., 2018, Five new species of the tribe Gyrophaenina Kraatz 1830 (Coleoptera: Staphylinidae: Aleocharinae) from the southern part of the United States, Zootaxa 4504 (2), pp. 209-224 : 214

Key to species of nitidula group of the genus Gyrophaena

1 Larger, body length: 2.60–3.00 mm. Elytra between cells of microsculpture without micropunctures. Ventral plate of aedeagus quite long; right wall between ventral plate and dorsal projection of internal sac slightly distinguishable (see Semenov et al. 2015: Fig. 3a )................................................................................ G. nitidula

- Body distinctly smaller. Elytra between cells of microsculpture with micropunctures. Ventral plate of aedeagus slightly or distinctly shorter; right wall of aedeagus between ventral plate and dorsal projection of internal sac well visible (see Semenov et al. 2015: Fig. 3c )...................................................................................... 2

2 Body length: 2.20–2.60 mm in length. Head and pronotum with dense, distinct punctures. Ventral plate of aedeagus short........................................................................................... G. pseudonitidula

- Smaller, body length: 1.50 mm. Head and pronotum with sparse, shallow punctures. Ventral plate of aedeagus quite wider and longer................................................................................. G. fontanedai sp.n.

Figures

FIGURES 1–5. Gyrophaena affinifera sp.n.: 1—habitus, 2—aedeagus, lateral view, 3—male abdominal tergite VIII, dorsal view, 4—female abdominal tergite VIII, dorsal view, 5—female abdominal sternite, dorsal view. Scale bars: 1 mm (1), 0.1 mm (2–5).