Brachilatus, Strelnikova et Yan, 2023

Strelnikova, O. D. & Yan, E. V., 2023, ON SPLITTING OF THE GENUS NOTOCUPES (COLEOPTERA: ARCHOSTEMATA): NEW DATA ON MORPHOLOGY AND TAXONOMY, Far Eastern Entomologist 488, pp. 1-28 : 21

Key to species of the genus Brachilatus

1. Elytron and pronotum has denticles; 25 of elytral cells in one row; apical abdominal sternite have rounded apex, 2.5 times longer than penultimate one .............…………………..... 2

– Elytron and pronotum has no denticles; 21–30 of elytral cells in one row; apical abdominal sternite has rounded or acute apex, 1.7–3.1 times longer than penultimate one .............. 3

2. Epipleural margin dentate along its entire length ................................................... B. viridis

– Epipleural margin dentate only at humerus level ....…………….…………….... B. caducus

3. About 30 cells in one elytral row ......................................................................................... 4

– Only 21–25 cells in one elytral row ...................................................................................... 5

4. Paracoxal suture does not reach metaventrite posterior angles; apical abdominal sternite 2.6 times longer than penultimate one ...……………………………..……..... B. premeris

– Paracoxal suture does not reach metaventrite posterior angles; apical abdominal sternite 2 times longer than penultimate one ............................................................ B. dundulaensis

5. Eyes small, their transverse diameter is more than 5 times the head width. Epipleuron 4.4– 4.9 times shorter than elytron ............................................................................................ 6

– Eyes large, their transverse diameter 3.3–3.8 times shorter than head width. Epipleuron 4.3 or 5.5–5.8 times shorter than elytron ................................................................................. 7

6. Head wide, 1.6 times narrower than pronotum ........………………….……...... B. oculatus

– Head narrow, 2.3 times narrower than pronotum. .............................................. B. foerstery

7. Epipleuron 4.3 times narrower than elytra. Apical abdominal sternite to penultimate one length ratio is 3.1 .............................................................................................. B. spinosus

– Epipleuron 5.5–5.8 times narrower than elytra. Apical abdominal sternite to penultimate one length ratio is 2.4–2.6 .....…………………….…………………………………....... 8

8. Body elongated, length to width ratio 2.1. Head narrow, pronotal width to head width ratio 5. Epipleuron almost does not narrow towards the apex. About 21 cells in one elytral row ......…………………………………………………….….... B. nigrimonticola

– Body broad, length to width ratio 1.8. Head narrow, pronotal width to head width ratio 1.9. Epipleuron sharply narrows in the anterior part. About 25 cells in the elytral row ( Fig. 8 ) ......................................................................................................................... B. longicoxa

Figures

Figs 5–8. Representatives of the four investigated genera. 5 – Rhabdocupes protensus (Tan et al., 2006); 6 – Conexicoxa epicharis (Tan, Ren et Liu, 2005); 7 – Notocupes picturatus Ponomarenko, 1964; 8 – Brachilatus longicoxa (Soriano et Martinez-Delclòs, 2006). Scale bar = 1 mm.