Dasiosoma bellum
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Ordo: Coleoptera
Familia: Carabidae
Genus: Dasiosoma
Name
Dasiosoma bellum (Habu, 1979a) comb. n. – Wikispecies link – Pensoft Profile
- Dasiosoma bellum Habu 1979a[1]: 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)[1].
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.
Taxon Treatment
- Shi, H; Zhou, H; Liang, H; 2013: Taxonomic synopsis of the subtribe Physoderina (Coleoptera, Carabidae, Lebiini), with species revisions of eight genera ZooKeys, 284: 1-129. doi
Other References
- ↑ 1.0 1.1 Habu A (1979a) A new genus and species of the Lebiini from Formosa (Coleoptera, Carabidae). Proceedings of the Japanese Society of Systematic Zoology 16: 65-69.
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