Bembidion (Desarmatocillenus)

Sasakawa, Kôji, 2007, Taxonomic studies on the Bembidion (‘ Cillenus’) complex (Coleoptera: Carabidae): A revision of the subgeneric taxonomy and description of a new species from Japan, Zootaxa 1575 (1), pp. 35-45 : 41

Key to species of the subgenus Desarmatocillenus

1 Elytral striae 6 and 7 indistinct on posterior half ( Figs. 4–5 ; see also Nakane 1956: Fig. 1 ); hind wings reduced......................................................................................................................................................... 2

- Elytral striae 6 and 7 distinct on posterior half ( Figs. 2–3 ); hind wings developed; head blackish, with metallic tinge ( Figs. 2–3 )............................................................................................................................. 4

2 Left mandible with a small subapical tooth ( Nakane 1956: Fig 2 ); dorsal surface uniformly black ( Morita 1985: Pl. 29, Fig. 29) ............................................................................................. tokunoshimanum Nakane

- Left mandible without subapical tooth; head and pronotum reddish brown ( Figs. 2–4 )............................. 3

3 Elytra reddish brown, without darker spots .............................................................................. tsutsuii Uéno

- Elytra reddish brown on lateral margins and interval 1, blackish brown on other parts ( Fig. 4 ) .................. .................................................................................................................................. yakushimanum sp. nov.

4 Hind trochanter more than half length of hind femur, with sharply pointed apex ( Fig. 9 ) .... aestuarii Uéno

- Hind trochanter less than half length of hind femur, with blunt apex ( Fig. 8 ) ............................................ 5

5 Anterior half of pronotum reddish brown, posterior half black .............................................. sumaoi Morita

- Pronotum uniformly black ( Fig. 2 ).............................................................................................................. 6

6 Elytra yellowish brown with black spot in the middle and near shoulders ( Fig. 5 ) ......... seticorne Lindroth

- Elytra usually entirely black ( Morita 1985: Pl. 17, Fig. 25 ), in some specimens with relatively large yellowish brown spots on basal 1/3 of lateral margins ( Nakane 1963: Pl. 13, Fig. 15 ) ......... yokohamae Bates

Figures

FIGURE 25. Phylogeny and possible character evolution of the Bembidion (‘Cillenus̓) complex based on the strict consensus tree obtained in the successive-weighted analysis. Black circles indicate nodes shared by the strict consensus tree resulting from the equally-weighted analysis. Numbers below branches indicate bootstrap values in the successiveweighted analysis / bootstrap values in the equally-weighted analysis / Bremer support in the equally-weighted analysis (only bootstrap values over 50% are reported). Numbers in the squares indicate characters in Table 1, and numbers above the squares indicate character-state changes. Black squares indicate unambiguously optimized characters. White squares indicate characters optimized with ACCTRAN and DELTRAN optimizations (marked with ‘(a)’ and ‘(d)’, respectively). The taxonomies from Lindroth (1980) and Marggi et al. (2003) are presented for comparison.

FIGURES 1–9. Habitus (1–5), elytral outermost intervals (6–7), and hind trochanter (8-9) of representative Bembidion species. 1. B. sinicum, male; 2. B. yokohamae, male (Heguri-gawa Riv); 3, 9. B. aestuarii, male (Rv. Obitsugawa). 4, 8. B. yakushimanum, holotype male; 5. B. tsutsuii, male; 6. B. yakushimanum, paratype female. 7. B. aestuarii, female (Riv. Tama). Arrows indicate posterior end of elytral outermost-intervals. Scales: 2.0 mm for 1, 1.0 mm for 2–5, 0.5 mm for 6– 9.

FIGURES 12–24. Endophalli (left anterolateral view, right lateral view) of Bembidion spp. (12–21) and an outgroup species, Blemus discus (22), and spermathecae of Bembidion spp. (23–24). 12, 23. B. sinicum; 13. B. kasaharai; 14. B. seticorne; 15. B. yokohamae; 16. B. aestuarii; 17. B. sumaoi; 18. B. tokunoshimanum; 19, 24. B. yakushimanum; 20. B. tsutsuii; 21. B. umi. Note that the endophallus of B. yokohamae (15) is not fully inflated because of damage during dissection. Numbers indicate character-number and character-state in Table 1. Scales: 0.25 mm.