Dasiosoma bellum (Habu, 1979a) Shi & Zhou & Liang, 2013

Shi, Hongliang, Zhou, Hongzhang & Liang, Hongbin, 2013, Taxonomic synopsis of the subtribe Physoderina (Coleoptera, Carabidae, Lebiini), with species revisions of eight genera, ZooKeys 284, pp. 1-129 : 67-68

Dasiosoma bellum (Habu, 1979a) comb. n. Habitus: Figs 25, 26 male genitalia: Fig. 87 female genitalia: Fig. 121

Dasiosoma bellum Habu 1979a: 67, Figs (original: Teradaia ; type locality: Kukuan (Taiwan); holotype deposited in NIAES).

Notes on types.

Teradaia bella Habu: Photograph of holotype is available on the website of National Institute for Agro-Environmental Sciences, Japan (Yoshitake and Kurihara). We didn’t examine the holotype, but it is easy to recognize this remarkable species from literature and photos.

Non-type material examined

(Total 6 specimens). 1 male, 3 females (CRS), "S. Vietnam / Nam Cat Tien Nat. Park / 1.-15.5.1994 / Pacholatko & Dembicky"[Fig. 87]. 1 female (SCAU), "Guangdong, Xinfeng, 1983.5, Huang Minlian leg."[Figs 25, 121]. 1 male (NHML), “Ceylon”; "Thwaites, 67 25"; " genus? / not far from / Lachnoderma "[Fig. 26].

Diagnosis.

Head and pronotum orange yellow, elytra dark blue, disc usually with a large elongate reddish yellow spot; 1st antennomere brown, 2nd and 3rd antennomeres black, then gradually paler from 4th to 7th antennomeres; pronotal lateral margins completely rounded in middle; basal foveae of pronotum straight, subparallel with median line, disc with elongate distinct depression on each side; vertex strongly tumid; tempora abruptly narrowed behind eyes; body slender, ratio EL/EW more than 1.55; apical lamella of aedeagus rather wide.

The unique color, slender body and elongate depression on pronotum readily distinguish this species from all others of the genus.

Description.

Male genitalia with median lobe of aedeagus strongly bent, ventral and dorsal margins nearly straight before apex in lateral view; strongly bent to right side in dorsal view; apical lamella wide, short, slightly triangular; base of median lobe strongly bent and expanded, basal orifice about 90° relative to preapical shaft. Internal sac with main flagellum long and slender, slightly sinuous, curved to right side; trumpet-form expansion small, short, slightly bent ventrally; secondary flagellum and apical bursa present; membrane adjacent to trumpet-form expansion finely scaled ( Fig. 87 ). Female genitalia. Apical segment of ovipositor scimitar-form, inner margin not angulate; length approximately three times basal width; inner margin setose in apical half; apex sharp, with membranous extension long and slender ( Fig. 121 ). Internal reproductive system not studied.

Detailed description of external characters has been provided by Habu (1979a).

Distribution

( Map 7 ). China (Taiwan, Guangdong); Vietnam; Sri Lanka.

Geographical variation.

This rare but widely distributed species is known from four different localities, and their elytral patterns vary from locality to locality. Four specimens from Vietnam have the widest reddish patch, occupying the inner five intervals; a specimen from Guangdong has the patch occupying the inner four intervals ( Fig. 25 ); the holotype from Taiwan has the patch barely reaching the third interval; a specimen from Sri Lanka is nearly without the patch ( Fig. 26 ). Furthermore, the holotype from Taiwan has the hind angles of pronotum slightly acute, while the others have the hind angles subrectangular. We studied male genitalia from two localities. They are very similar in the apical part of median lobe of the aedeagus, but the specimen from Sri Lanka has the median lobe with base less bent and expanded than the one from Vietnam.

Remarks.

This species could be most closely related to Dasiosoma maindroni (Tian & Deuve). These two species share following characters: (1) vertex strongly tumid, tempora abruptly narrowed behind eyes; (2) aedeagus with base of median lobe strongly bent and expanded, basal orifice about 90° relative to preapical shaft.

Figures

Map 7. Known distribution of Oriental species of genus Dasiosoma: ● Dasiosoma hirsutum (Bates) ★ Dasiosoma maindroni (Tian & Deuve) ▲ Dasiosoma quadraticolle sp. n. ◆ Dasiosoma bellum (Habu) ■ Dasiosoma indicum (Kirschenhofer).

Figure 87. Median lobe of male genitalia, right-lateral, ventral, left-lateral, dorsal views of Dasiosoma bellum (Habu), a specimen from Vietnam.

Figures 25 - 30. Habitus, scale bars = 2.0 mm: 25 Dasiosoma bellum (Habu), a specimen from Guangdong 26 Dasiosoma bellum (Habu), a specimen from Sri Lanka 27 Orionella lewisii (Bates), a specimen from Japan 28 Orionella discoidalis (Bates), a specimen from Yunnan 29 Orionella kathmanduensis (Kirschenhofer), a specimen from Nepal 30 Endynomena pradieri (Fairmaire), a specimen from Fujian.

Figures 111 - 125. Left ovipositors of females, ventral view, scale bars = 0.2 mm: 111 Paraphaea binotata (Dejean), a specimen from Guangxi 112 Paraphaea minor sp. n., a paratype from Hainan 113 Paraphaea philippinensis (Jedlicka), holotype 114 Anchista fenestrata fenestrata (Schmidt-Goebel), a specimen from Nepal 115 Physodera dejeani Eschscholtz, a specimen from Yunnan 116 Physodera eschscholtzii Parry, a specimen from Yunnan 117 Diamella cupreomicans (Oberthuer), a specimen from Yunnan 118 Allocota aurata (Bates), a specimen from Shaanxi 119 Allocota bicolor sp. n., a paratype from Guangdong 120 Lachnoderma asperum Bates, a specimen from Zhejiang 121 Dasiosoma bellum (Habu), a specimen from Guangdong 122 Dasiosoma maindroni (Tian & Deuve), a specimen from Tonkin 123 Dasiosoma quadraticolle sp. n., a paratype from Yunnan 124 Orionella lewisii (Bates), a specimen from Zhejiang 125 Endynomena pradieri (Fairmaire), a specimen from Taiwan.