Exochomoscirtes decemguttatus ( Champion, 1918 ), 2010

Ruta, Rafał & Yoshitomi, Hiroyuki, 2010, Revision of the genus Exochomoscirtes Pic (Coleoptera: Scirtidae: Scirtinae) 2598, Zootaxa 2598 (1), pp. 1-80 : 37-38

Exochomoscirtes decemguttatus ( Champion, 1918)

Scirtes decemguttatus Champion, 1918: 220

( Figs. 10C , 12D , 29 )

Type material. Holotype, male ( NHM): “Type / H. T.” [round label with red margin]; “Kodai Kanal / S. India. Campbell” [printed label]; “1918.97” [handwritten]; “ Scirtes / 10-guttatus / Ch.” [handwritten by Champion ].

Diagnosis. Dorsal pattern resembles the one in several members of the flavoguttatus group of Scirtes and is unique in the genus Exochomoscirtes .

Redescription. Holotype, male. Body elongate oval, TL/EW 1.4, moderately convex, covered with brownish suberect setae. Head, pronotum and scutellum brownish-black. Elytra dark brown with 10 yellow spots. Each elytron with one arrow-like spot in adscutellar region, two oval spots in basal portion, two basal spots in posterior portion of elytra, and a single oval spot in apical portion of elytra. Antennomeres 1–3 yellowish, remaining brown. Legs and mouthparts brownish.

Head with subtle punctation, punctures separated by ca. 1.0–2.0 diameters. Eyes big, protuberant; head 1.6 X wider than interocular space. Antennae filiform, reaching basal 1/3 of elytra. Antennomere 1 cylindrical, antennomeres 2 and 3 of subequal lengths, antennomeres 4–10 elongate, 1.5 X longer than antennomere 2, apical antennomere absent in the holotype. Palpomeres of maxillary palpi moderately wide.

Pronotum small, slightly convex, covered with sparse punctation, punctures separated by 1.5–2.0 diameters, anterolateral corners obtuse, slightly projecting anteriorly; lateral margins slightly rounded; posterolateral corners almost right angled; base of pronotum subtrapezoidal, with complete margination along basal margin; PW/PL 2.8. Scutellum relatively big, punctured as on pronotum, equilaterally triangular. Angle between pronotum and elytra not marked in dorsal outline.

Elytra oval, with slightly explanate lateral margins, widest in middle, punctation stronger than on pronotum, punctures separated by ca. 1.0 diameter; humeri well marked; EL/EW 1.2; EL/PL 4.9; EW/PW 1.5.

Legs moderately long. Hind tibial spurs well developed, dorsal one elongated and unmodified apically, 0.8 X as long as tarsomere 1 and over twice as long as ventral spur. Ventral spur slightly curved.

Ventrite 1 with sparse setation in mesal portion, longitudinal ridge on ventrite 1 present, ventrite 2 with basal row of big punctures. Apex of tergite 7 unmodified. Apex of ventrite 5 with wide and relatively deep emargination.

Sternite 9 (L 0.53, W 0.30) consisting of subtriangular hemisternites, apex with a few apical setae. Tergite 8 (L 0.59, W 0.40) moderately sclerotized, apical portion moderately large, with arcuate apex, bearing row of indistinct, short setae on apical margin, with a pair of long apodemes diverging basally; tergite 9 (L 0.65, W 0.38) moderately sclerotized, apical portion relatively small, emarginated at apex, bearing minute setae, with a pair of long apodemes diverging basally, apodemes fused anteriorly and forming bidentate apex. Tegmen (L 0.80, W 0.33) well sclerotized, parameres very long, sinuate, hooked at apices, mesal process narrow, ca. half as long as parameres. Penis (L 0.62, W 0.13) small, moderately sclerotized, pala moderately narrow, elongate oval, apical process longer than pala, curved apically.

Female unknown.

Measurements. Male (n = 1): TL 3.38, PL 0.60, PW 1.65, EL 2.95, EW 2.40.

Distribution. S India.

Figures

FIGURE 10. Selected holotype labels. A) Exochomoscirtes bimaculatus Pic; B) E. binotatus Pic; C) E. decemguttatus (Champion); D) E. ephippiatus (Champion); E) E. maculatus (Bourgeois); F) E. maculatus (Waterhouse); G) E. rufomaculatus Pic; H) E. sphaericus (Champion); I) E. tetrastigma (Champion).

FIGURE 12. Habitus illustrations of Exochomoscirtes. A) E. maculatus (Waterhouse); B)–C) E. ceylonicus sp. nov.; D) E. decemguttatus (Champion); E)–G) E. klausnitzeri sp. nov., color forms F – S Thailand, male, E and G – Sarawak, females; H) E. cf. klausnitzeri (NW Thailand); I) E. luteosuturalis sp. nov.; J) E. cf. luteosuturalis sp. nov., female, Sulawesi; K) E. cf. luteosuturalis, female, Vietnam; L) E. luteosuturaloides sp. nov.; M) E. jaechi sp. nov.; N) E. ruforotundus (Watts); O) E. ruforotundus (Watts), Bali. Scale bar = 2.0 mm.

FIGURE 29. Exochomoscirtes decemguttatus (Champion), male. A) sternite 9; B) tergite 8; C) tergite 9; D) tegmen; E) penis. Scale bar = 0.5 mm.