Apatrobus (Apatrobus) osuzuyamanus, Sasakawa, Kôji & Toki, Wataru, 2007

Sasakawa, Kôji & Toki, Wataru, 2007, Apatrobus osuzuyamanus sp. nov., a new patrobine species from Japan, with a comparative study of the male genital morphology of the tribe Patrobini (Coleoptera: Carabidae), Zootaxa 1615, pp. 41-48 : 43-46

Apatrobus (Apatrobus) osuzuyamanus sp. nov.

Figs 2–3 , 5, 8–10 , 12–16 , 22–23

Type materials. Holotype, ď, Mt. Osuzuyama, ca 1300 m Tsuno-chô, Miyazaki Pref. (32°16'N, 131°25'E), 14. ix. 2006, Wataru Toki leg., ( FZUT 0014) [ FZUT]; Paratypes, 5ďď, same data as holotype; 4ďď2ΨΨ, same locality and collector, 4. v. 2006; 1ď3ΨΨ, same locality and collector, 24. v. 2007 [ FZUT, NHML and KS].

Other specimens examined for comparison. A. (A.) ohtsukai Morita 1993 ( Figs 1 , 4, 6–7 ): ď, holotype, ‘ Holotype (red label)//NO 1 (light-blue label)//Mt. Yamaingiri Izumi-mura Kumamoto Pref. Kyushu JAPAN // 13-IX-1992 S. MORITA leg.// Apatrobus ohtsukai Morita sp. nov. Det. S. Morita, 1993 ’, [ NSMT]; A. (A.) hikosanus ( Habu 1953) ( Fig. 11 ): ď, Mt. Hikosan Fukuoka Pref. (type locality), 11. vi. 1984. S. Kasahara leg.’, [ NSMT]; A. (A.) kurosawai Morita 1986 ( Fig. 20 ): ďΨ, Kinsenji, Mt. Taradake, Nagasaki Pref. (type locality), 3-5. vi. 2005, [KS].

Diagnosis. Externally similar to A. ohtsukai , A. hikosanus , and A. kurosawai , but distinguished from A. ohtsukai by a larger body ( Figs 1–3 ), a pair of small depressions on the pronotum ( Figs 4–5 ), and an aedeagal apex with an acute right edge (arrows with an asterisk in Figs 6, 9 ; see also Morita 1993: Fig. 5 ); from A. hikosanus by the absence of a denticle at the aedeagal apex (arrows with two asterisks in Figs 10–11 ); and from A. kurosawai by developed spiny sclerites ( Figs 20–22 ).

Description. Body length (measured from the apex of clypeus to the elytral end): ď, 9.78–10.79 mm (mean ± SD; 10.31±0.27 mm; n=11); Ψ, 10.48–11.35 mm (mean ± SD; 10.97±0.32 mm; n=5). Dorsal surface ( Figs 2–3 ) black and shiny, without metallic luster. Appendages dark brown.

Head widest at mid-eye level, with length from clypeal apex to neck base 0.71–0.76 times longer than width between eyes; mandibles short, with grooved surface; labrum 6-setose, with anterior margin almost straight; frontal impressions large and deep, with posterior ends reaching to those of the eyes; surface of frontal impressions markedly punctate; frons sparsely punctate; two pairs of supraorbital setae, anterior pair at mid-eye level and posterior pair at the level of the basal 1/3 of tempora; longitudinal line between eye and supraorbital seta deep and long, with posterior ends reaching apical 1/3 of tempora; eyes convex and almost the same length as tempora; tempora swollen, almost smooth at dorsal and lateral sides, but punctate at ventral side; mentum tooth bifid, with a pair of setae at base; submentum with two pairs of setae. Antennae long; segments 1–2 without pubescence; one seta on segment 1; four setae on segment 2.

Pronotum ( Fig. 5 ) cordate, widest at apical 1/3, 0.78–0.86 times longer along median line than wide at widest point; anterior margin weakly emarginated, with width between apices of anterior angles 0.62–0.70 times wider than pronotal width at widest point; posterior margin almost straight, with width between apices of posterior angles 0.66–0.71 times wider than pronotal width at widest point; lateral margins arcuate at apical 2/3, slightly sinuate at basal 1/3; anterior angles barely produced; posterior angles almost right-angled, with apices narrowly rounded; two pairs of marginal setae, anterior pair at apical 1/3 and posterior pair at the tip of hind angle; surface with punctations at anterior and posterior margins and laterobasal impressions; small depression at point midway between median line and anterior marginal seta; laterobasal impression single and deep; median line deep in mid-region, shallow near the anterior and posterior margins.

Elytra convex, widest behind middle, 1.56–1.68 times longer than wide at widest point; shoulders rounded, without a denticulate tooth; apices narrowly rounded but not denticulate; intervals convex near base, almost flat at apex; scutellar stria present, but not connected to stria 1; one dorsal pore at the anterior end of stria 1; three dorsal pores on interval 3, all adjoining stria 3; hind wings reduced.

Ventral side with punctations at ventral side of tempora, prosternum, episternum, and lateral sides of sterna 2–7; sternum 7 with a pair of setae in males, two pairs in females. Legs stout; hind tarsomeres with three to four setae on ventrolateral margins.

Aedeagus ( Figs 8–10 , 23 ) stout, bent in somewhat obtuse angle near the base, twisted to right side; dorsal surface membranous except for apical part; apical part bent in the right lateroapical direction; right corner of apical part protruded ventrally, left one dorsally. Right paramere broad. Left paramere broad, larger than right one.

Endophallus ( Figs 12–14 , 22 ) stout and straight, directed right dorsolaterally; left pigmented band short, weakly sclerotized; left laterobasal lobe large; ligula small, weakly arcuate, with apex narrowly pointed; dorsal lobe markedly large, with dorsum bearing spiny sclerites; both right and left subapical lobes moderatesized, adjoining dorsal lobe; right apical lobe moderate, adjoining dorsal lobe; left apical lobe small; gonoporal piece large.

Vagina ( Figs 15–16 ) with strong pigmentation at base; bursa copulatrix markedly large, with anteroposteriorly elongated bursal sclerite on ventral surface; irregular pigmentations on dorsoapical surface of bursa copulatrix; spermatheca almost straight and elongated, with apex weakly expanded; spermathecal gland connected to basal 1/6 of spermatheca.

Figures

FIGURES 1 – 3. Habitus of Apatrobus ohtsukai (1, holotype male) and A. osuzuyamanus sp. nov. (2, holotype male; 3, paratype female). Scales: 3.0 mm.

FIGURES 4 – 11. Pronotum (4 – 5) and male genitalia (6 – 11) of Apatrobus spp. 4. A. ohtsukai, holotype male; 5. A. osuzuyamanus sp. nov., holotype male; 6 – 7. A. ohtsukai, holotype male (6. aedeagal apex, dorsal view; 7. aedeagal apex, ventral view); 8 – 10. A. osuzuyamanus sp. nov, holotype male (8. aedeagus, left lateral view; 9. aedeagal apex, dorsal view; 10. aedeagal apex, ventral view); 11. A. hikosanus (aedeagal apex, ventral view). el. elytron; gp. gonoporal piece; st. sternum. Arrows with one or two asterisks indicate the differences among species (see specific section). Scales: 0.5 mm.

FIGURES 12 – 16. Endophallus (12, ventral view; 13, right lateral view; 14, left lateral view) and female genitalia (15, dorsal view; 16, ventral view) of Apatrobus osuzuyamanus sp. nov. (paratypes). ad. aedeagus; bc. bursa copulatorix; bp. basal pigmentation; bs. bursal sclerite; dl. dorsal lobe; gp. gonoporal piece; la. left apical lobe; lb. left laterobasal lobe; lp. left pigmented band; ls. left subapical lobe; lg. ligula; mo. median oviduct; ra. right apical lobe; rs. right subapical lobe; sg. spermathecal gland; sp. spermatheca; ss. spiny sclerites; vg. vagina. Scales: 1.0 mm.

FIGURES 17 – 24. Homology of sclerites on the endophallus. 17 – 18. Diplous (Platidus) depressus (17. everted endophallus, right ventro-lateral view; 18. aedeagus with endophallus feebly everted, right lateral view); 19. D. (D.) sibiricus caligatus (aedeagus with endophallus feebly everted to show ligula, right dorso-lateral view); 20 – 21. Apatrobus (A.) kurosawai (20. everted endophallus, right lateral view; 21. everted endophallus, left lateral view); 22 – 23. A. (A.) osuzuyamanus sp. nov. (22. everted endophallus, right lateral view; 23. aedeagus wth endophallus feebly everted to show ligula, right dorso-lateral view); 24 – 25. Archipatrobus flavipes (24. everted endophallus, dorsal view; 25. everted endophallus, ventral view). aa. aedeagal apex; gp. gonoporal piece; lg. ligula; ss. spiny sclerites. Solid lines refer to homology of the ligula (lg), and dotted ones to that of the spiny sclerites. Scales: 0.5 mm.