Velleius Leach, 1819

Zhao, Zong-Yi & Zhou, Hong-Zhang, 2015, Phylogeny and taxonomic revision of the subgenus Velleius Leach (Coleoptera: Staphylinidae: Staphylininae), Zootaxa 3957 (3), pp. 251-276 : 259

Key to species of the subgenus Velleius Leach, 1819

1. antennal segments IV–X each shallowly bifurcated ( Fig. 4 A)................................................... 2

- antennal segments IV–X each deeply bifurcated ( Fig. 4 B)..................................................... 3

2. head subcircular ( Fig. 4 D)..................................................... Quedius (Velleius) circumipectus

- head subquadrate ( Fig. 4 C).................................................................. Q. (V.) dilatatus

3. last antennal segment very long, longer than three preceding segments combined..................... Q. (V.) pectinatus

- last antennal segment not very long, shorter than three preceding segments combined................................ 4

4. anterior ridge of scutellum with middle portion straight............................................. Q. (V.) setosus

- anterior ridge of scutellum with middle portion not straight.................................................... 5

5. anterior ridge of scutellum entire...................................................... Q. (V.) sagittalis sp. nov.

- anterior ridge of scutellum with middle portion broken and separated into two parts................................. 6

6. abdominal tergite V and VI bearing large middle lateral setae (fig. 4J)............................................ 7

- abdominal tergite V and VI lacking large middle lateral setae................................................... 8

7. body entirely pale brown................................................................... Q. (V.) elongatus

- body entirely dark brown.................................................................. Q. (V.) japonicus

8. head subcircular ( Fig. 4 D)............................................................ Q. (V.) rectilatus sp. nov.

- head subquadrate ( Fig. 4 C)................................................................ Q. (V.) amamiensis

Figures

FIGURE 4. Some structures of Velleius. A – B, antenna. (A) Q. (V.) dilatatus, (B) Q. (V.) rectilatus. C – D, head in dorsal view. (C) Q. (V.) dilatatus, (D) Q. (V.) rectilatus, AFSP = anterior frontal setiferous puncture, PFSP = posterior frontal setiferous puncture, (E) pronotum of Q. (V.) dilatatus, DR = dorsal row, SLR = sublateral row (Q. (V.) dilatatus without the posterior puncture), LLSP = large lateral setiferous puncture, (F) elytra of Q. (V.) rectilatus. G – I, scutellum. (G) Q. (V.) dilatatus, (H) Q. (V.) japonicus, (I) Q. (V.) sagittalis, abr = anterior basal ridge, pbr = posterior basal ridge, (J) abdominal tergite V of Q. (V.) dilatatus, LMLS = large middle lateral seta, (K) male abdominal tergite VIII of Q. (V.) elongatus, showing all large setae but not small ordinary ones, (L) male abdominal sternite VIII of Q. (V.) elongatus, showing all large setae and the glabrous area in front of apical emargination. Scales = 0.5 mm.