Bembidion (Desarmatocillenus), Netolitzky, 1942

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 : 39-40

Subgenus Desarmatocillenus Netolitzky, 1942

( Figs. 2–9 , 13–20, 23–24 )

Desarmatocillenus Netolitzky, 1942: 39 , type species: Cillenus yokohamae Bates , by original designation. Uéno 1955a:

347. Nakane 1963: 26. Kryzhanovskij et al. 1995: 76. Desarmatocillenus (part): Lindroth 1980: 194. Marggi et al. 2003: 272. Novicillenus Uéno & Habu [in Uéno], 1955: 347, type species: Armatocillenus aestuarii Uéno & Habu , by original des-

ignation. Uéno 1955a: 347. Nakane 1963: 26. Syn. nov. Novicillenus (part): Habu 1978a: 61. Marggi et al. 2003: 272. Corallicilenus Uéno, 1955b: 406, type species: Armatocillenus tsutsuii Uéno , by original designation. Nakane 1963: 26.

Marggi et al. 2003: 272. Syn. nov. Armatocillenus (part): Nakane, 1963: 26. Morita, 1985: 92. Morita, 1993: 17.

Diagnosis. Similar to other members of the B. (‘ Cillenus ̓) complex in having a large head with long mandibles, but distinguished by the character states of the pronotum, particularly the produced anterior angles and the sinuate posterior margin near the hind angles ( Figs. 1–5 ; see also Lindroth 1980: Figs. 17 –32).

Description. Body ( Figs. 2–5 ) small (about 3.5–4.5 mm; see Nakane 1963; Lindroth 1980; Morita 1993). Head large; mandibles long, the part protruding beyond the labrum more than three times longer than the labium; frontal impressions deep and long, with the posterior ends reaching those of eyes; tempora short and not swollen, with more than 5 setae on the lateral and ventrolateral sides.

Pronotum subcordate, widest at apical 1/3; anterior margin emarginate, wider than posterior margin; anterior angles produced; lateral margins arcuate on apical 2/3, sinuate on basal 1/3; two pairs of marginal setae, anterior pair in front of the widest pronotal point and posterior pair on tip of hind angles; posterior margin slightly arcuate at median area, sinuate near hind angles; hind angles with tip narrowly rounded; surface almost smooth; anterior transverse line superficial; posterior transverse line deep, connecting both sides of the laterobasal impressions; laterobasal impressions small and deep; median line impressed between anterior and posterior transverse lines, absent near the anterior and posterior margins.

Elytra oblong; shoulders not denticulate; intervals almost flat; scutellar stria present, not connected to stria 1; 1 setigerous puncture at anterior end of stria 1; 2 setigerous punctures on interval 3, both adjoining stria 3; apices rounded and not denticulate. Ventral side almost smooth; male sternum 7 with two pairs of setae.

Aedeagus spatulate, weakly arcuate ventrally; left paramere larger than right paramere; endophallus ( Figs. 14–20 ) straight, directed dorsally, without sclerites except for gonopore; gonopore with two sclerotized parts; 3 lobes present in all species, 1 on ventromedian surface (i.e., ventromedian lobe), 1 on dorsomedian surface (i.e., dorsomedian lobe), and 1 near gonopore (i.e., gonoporal lobe).

Vagina without pigmentation; basal and apical parts of spermatheca sclerotized; sclerotized part of spermathecal apex ( Fig. 24 ) long, length almost twice its width.

Included species. Bembidion yokohamae (Bates) ( Figs. 2 , 15 ), B. seticorne Lindroth ( Fig. 14 ), B. sumaoi Morita ( Fig. 16 ), B. aestuarii (Uéno & Habu) ( Fig. 17 ), B. tokunoshimanum (Nakane) ( Fig. 18 ), B. tsutsuii (Uéno) ( Figs. 5 , 11 , 20 ), and B. yakushimanum sp. nov. ( Figs. 4, 6, 8 , 10 , 19 ).

Figures

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.

FIGURES 10–11. Aedeagus of Bembidion yakushimanum (10, left lateral view) and B. tsutsuii (11, left lateral view of apical part). Scale: 0.25 mm.