Decamerus Solier, 1849

Kolibac, Jiri, 2013, Trogossitidae: A review of the beetle family, with a catalogue and keys, ZooKeys 366, pp. 1-194 : 105-106

Genus Decamerus Solier, 1849 Figs 10 , 18 ; Map 11

Decamerus Solier, A. J. J. 1849: 369.

Type species.

Decamerus haemorrhoidalis Solier, 1849 [by monotypy]

Léveillé, A. 1910: 28. Crowson, R. A. 1964a: 291. Kolibáč, J. 2005: 52 (redescription). Kolibáč, J. 2006: 111 (phylogeny)

Peltostoma Reitter, 1877 [Type species: Peltostoma unguicularis Reitter, 1877; by monotypy]

Léveillé, A. 1910: 28 (synonymized?). Reitter, E. 1877: 173

Description.

Body size: about 3.0 mm. Body shape flat. Gular sutures wide, convergent at apex. Frontoclypeal suture present. Frons: longitudinal groove or depression absent. Cranium ventrally: tufts of long setae at sides absent. Submentum: ctenidium absent. Antennal groove absent. Eyes: size large, lateral. Eyes number: two. Epicranial acumination absent. Lacinial hooks absent. Galea: shape elongate. Galea: ciliate setae absent. Mediostipes-Lacinia partially fused. Palpifer: outer edge even. Mandibular apical teeth number: two, horizontally situated. Mola present. Penicillus (at base) present (fine, often membranous). Pubescence above mola or cutting edge absent. Ventral furrow present. Basal notch shallow or absent. Labrum-Cranium not fused. Epipharyngial sclerite absent. Lateral tormal process: projection projections extending laterally and downwards ( Eronyxa ). Ligula: ciliate setae absent. Ligula membranous, not retroflexed, deeply emarginate. Hypopharyngeal sclerite H-shaped. Antenna 10-segmented. Antennal club weakly asymmetrical, sensorial fields absent. Front coxal cavities externally open, internally open. Pronotum transverse. Prepectus present. Middle coxal cavities open. Elytra: long hairs absent. Epipleuron thin. Elytral interlocking mechanism absent, carinae reduced. Elytral punctation irregular, scales absent. Wing: radial cell moved down, often small, wedge cell absent, cross vein MP3-4 absent, cross vein AA1+2-3+4 absent. Front tibiae: spines along side moderate. Hooked spur absent, apical spurs not hooked or weakly hooked. Claws: denticle distinct. Parasternites number along ventrites III-VII: absent. Spiculum gastrale absent. Tegmen composed of only a single part.

Biology.

The species occur on the flowers of various bushes. Floricolous, found together with Diontolobus .

Distribution.

Central part of Chile, approximately regions IV to VI.

Species:

Decamerus haemorrhoidalis Solier, 1849; Chile (AL)

Léveillé, A. 1910: 28. Kolibáč, J. 2005: 52 (redescription). Reitter, E. 1877: 174 (syn. Peltostoma unguicularis Reitter, 1877; synonymized by Léveillé 1910?)

Figures

Figure 10. A Thymalus limbatus B Phloiophilus edwardsi C Eronyxa marginicollis D Decamerus haemorhoidalis E Diontolobus punctatipennis F Afrocyrona ciskeiensis G Afrocyrona dwesae H Grynoma sp., New Zealand I Grynoma diluta.

Map 11. A distribution of the tribe Decamerini including the newly described genus † Cretamerus. A position of Eronyxa is indicated.

Figure 18. A Thymalus limbatus, elytral apex with interlocking mechanism B-E Decamerus haemorhoidalis (B prothorax with partially closed procoxal cavities C metatarsal claws with denticle D protarsus with projecting empodium E irregular punctation of elytra) F Grynocharis oblonga, elytral sculpture G-H Lophocateres pusillus (G head in frontal view with deeply emarginate frontoclypeal suture H detail).