Discheramocephalus vasilii

Darby, Michael, 2013, Studies of Madagascan Ptiliidae (Coleoptera) 1: The Tribe Discheramocephalini including eighteen new species, Zootaxa 3718 (3), pp. 239-266: 241-245

publication ID

http://dx.doi.org/10.11646/zootaxa.3718.3.2

publication LSID

lsid:zoobank.org:pub:003A16B5-34C5-48F8-A41C-8B784F3B06CB

persistent identifier

http://treatment.plazi.org/id/53653D9C-FDD2-4A00-8FC8-FFB143CD0544

taxon LSID

lsid:zoobank.org:act:53653D9C-FDD2-4A00-8FC8-FFB143CD0544

treatment provided by

Plazi

scientific name

Discheramocephalus vasilii
status

sp.n

Discheramocephalus vasilii  sp.n

( Figs. 2View FIGURES 1 – 8, 20, 22, 23, 24, 25, 28)

Length 0.70–72 mm. Colour dark reddish brown, sparsely pubescent, smooth and shining, legs and antennae uniformly dusky yellow. Antennomeres 1,2 large, 3 attenuated, 4 almost parallel sided, 5–9 rounded, 10 almost spherical, 11 slightly elongate, both 10 and 11 bearing visible sensillae and together forming a club, ( Fig. 28View FIGURES 25 – 28). Head broad, with large, shallow, setae bearing pits on the vertex and a transverse sulcate groove behind eyes not bridged laterally from eye to temple, ventral interruption approximately 1 / 3 width of the head. Pronotum 0.18 mm long and 0.23–0.24 mm wide, with two longitudinal furrows on each side adjacent to midline and not shorter than 90 % of pronotal length, flanked laterally by a single basal depression; posterior edge with a rounded emargination fringed by hairs in front of scutellum. Scutellum with a central longitudinal keel separating two large circular foveae at base and two smaller, deeper foveae at the anterior angles. Wings present of usual Ptiliid form. Elytra 0.42–0.43 mm long, 0.27–0.28 mm wide, with a shallow depression at the humerus delimited laterally by a short carina. Mesoventrite with front angles strongly toothed. Abdominal ventrite VIII with two large circular foveae at lateral margins.

FIGURES 9–18. Habitus. 9, D. rahanitriniainae  ; 10. D. ravelosoni  ; 11, D. fabrum  ; 12, D. nigerrimum  ; 13, D. pilosum  ; 14, D. andasibense  ; 15, D. longulum  ; 16, D. imitatum  ; 17, D. delicatum  ; 18, D. subinsulsum  .

Female: spermatheca Fig. 26View FIGURES 25 – 28. Indistinguishable in normal preparations from bisulcatus  .

Male: aedeagus Fig. 25View FIGURES 25 – 28. Large, extending into the metaventral cavity. Sperm. very long and spirally orientated (visible in the female).

Etymology. Named in honour of Vasily Grebennikov for his work on the genus and his help to the writer.

Remarks. Easily distinquished from bisulcatus  by the larger size, presence of four longitudinal furrows on the pronotum, and by the more bulbous antennomeres 3–8. The pronotal characters are shared by two other species of the genus, elisabethae Grebennikov and mikaeli Grebennikov. From both of these vasilii  may be separated by the presence of the large shallow seta bearing pits on the head.

Type data. Holotype: ♂, Andasibe N.P., Circuit Indri 2, 20.xi. 2010, S. Rahanitriniaina (BMNH). Paratypes: all by sifting and Winkler apparatus extraction from the Ambohitantely Spec. Res. except where otherwise stated. 2 exs, ABT/ 10 / 2011, plant residues under Pandanus  , S. 18 o 11 ’ 39.2 ’’ E. 47 o 17 ’ 12.6 ’’, 1674 m, 19.iv. 2011, L.S.Rahanitriniaina & R. Raveloson, (BMNH); 3 exs, ABT/ Nov/ 2011 /02, forest litter,, S. 18 o 11 ’ 49.1 ’’ E. 47 o 17 ’05.6’’, 1547 m, 16– 17.xi. 2011, L.S.Rahanitriniaina & P.Banar, (BMNH); 5 exs, ABT/ Nov/ 2011 /01, forest litter under big Pandanus  , S. 18 o 11 ’ 52.7 ’’ E. 47 o 17 ’ 0.4 ’’, 1603 m, 16.xi. 2011, L.S.Rahanitriniaina & P.Banar, (BMNH); 4 exs, ABT/ Sept/ 2011 /02, forest litter under Pandanus  , S. 18 o 11 ’ 44.2 ’’ E. 47 o 17 ’ 12.2 ’’, 1608 m, 1.xi. 2011, L.S.Rahanitriniaina (BMNH); 14 exs, ABT/ Nov/ 2011 / 4, forest litter under Pandanus  , S. 18 o 11 ’ 22.7 ’’ E. 47 o 17 ’07.8’’, 1623 m, 21.xi. 2011, L.S.Rahanitriniaina (BMNH); 27 exs, ABT/ Nov/ 2011 /04, forest litter under palm tree and big rotten trunk, S. 18 o 11 ’ 56.5 ’’ E. 47 o 17 ’ 26.1 ’’, 1561 m, 17.xi. 2011, L.S.Rahanitriniaina (BMNH); 11 exs, ABT/ Nov. 2011 /09, forest litter, 1610 m, 18.xi. 2011, P. Banar (BMNH); 11 exs, ABT/ Nov/ 2011 / 10, forest litter under palm tree, 1600 m, 18.xi. 2011, P. Banar, (BMNH); 1 ex, ABT/ Nov/ 2011 / 11, forest litter, S. 18 o 10 ’ 52.6 ’’ E. 47 o 17 ’ 22.5 ’’, 1497 m, 18.xi. 2011, L.S.Rahanitriniaina (BMNH); 1 ex, ABT/ Nov/ 2011 / 13, forest litter, S. 18 o 10 ’ 56.9 ’’ E. 47 o 17 ’ 21.9 ’’, 1497 m, 18.xi. 2011, L.S.Rahanitriniaina (BMNH); 9 exs, ABT/ Nov. 2011 / 15, forest litter under Pandanus  ; S. 18 o 11 ’32.0’’ E. 47 o 17 ’08.7’’, 1634 m, 21.xi. 2010, L.S.Rahanitriniaina (BMNH); 23 exs, ABT/ Nov/ 2011 / 16, forest litter under Pandanus  ; S. 18 o 11 ’ 42.6 ’’ E. 47 o 17 ’ 10.8 ’’, 1620 m, 21.xi. 2010, L.S.Rahanitriniaina (BMNH); 1 ex, ABT/ Nov/ 2011 / 19, forest litter, S. 18 o 10 ’ 56.9 ’’ E. 47 o 21 ’ 17.9 ’’, 1497 m, 23.xi. 2011, L.S.Rahanitriniaina (BMNH); 1 ex, ABT/ Nov/ 2011 / 18, litter under group of palm trees, S. 18 o 11 ’ 48.7 ’’ E. 47 o 17 ’ 11.3 ’’, 1614 m, 22.xi. 2011, L.S.Rahanitriniaina (BMNH); 6 exs, ABT/ Sep/ 2011 / 29, forest litter under Pandanus  , S. 18 o 11 ’ 54.2 ’’ E. 47 o 17 ’05.5’’, 1613 m, 6.ix. 2011, L.S.Rahanitriniaina (BMNH); 13 examples, ABT/ Sept. 2011 /03, forest litter under Pandanus  , S. 18 ˚ 11 ’ 46.4 ’’ E. 47 ˚ 17 ’09.9’’, 1570 m, 1.ix. 2011, L.S.Rahanitriniaina (BMNH); 1 ex, ABT/ Sept. 2011 /08, forest litter (bamboo, Pandanus  ), S. 18 ˚ 10 ’ 52.3 ’’ E. 47 ˚ 17 ’ 21.3 ’’, 1493 m, 2.ix. 2011, L.S.Rahanitriniaina (BMNH); ABT/ Sept. 2011 / 11, forest litter under palm tree close by waterfall, S. 18 ˚ 10 ’ 58.3 ’’ E. 47 ˚ 17 ’ 22.2 ’’, 1518 m, 3.ix. 2011, L.S.Rahanitriniaina (BMNH); 1 ex, ABT/ Sept. 2011 / 13, forest litter under Pandanus  and by big tree, S. 18 ˚ 10 ’ 58.4 ’’ E. 47 ˚ 17 ’ 22.6 ’’, 1525 m, 3.ix. 2011, L.S.Rahanitriniaina (BMNH); 6 exs, ABT/ Nov. 2011 /03, forest litter, S. 18 ˚ 11 ’ 42.9 ’’ E. 47 ˚ 17 ’ 20.3 ’’, 1640 m, 17.xi. 2011, L.S.Rahanitriniaina (BMNH); 4 exs, ABT/ Nov. 2011 /07, forest litter under Pandanus  very dry material, S. 18 ˚ 11 ’ 48.5 ’’ E. 47 ˚ 17 ’09.3’’, 1595 m, 17.xi. 2011, P. Banar (BMNH); 10 exs, ABT/ Sept. 2011 /04, forest litter under Pandanus  , S. 18 ˚ 11 ’ 46.4 ’’ E. 47 ˚ 17 ’09.9’’, 1570 m, 1.ix. 2011, L.S.Rahanitriniaina (BMNH);