Diontolobus Solier, 1849

Kolibac, Jiri, 2013, Trogossitidae: A review of the beetle family, with a catalogue and keys, ZooKeys 366, pp. 1-194 : 106-108

Genus Diontolobus Solier, 1849 Fig. 10 ; Map 11

Diontolobus Solier, A. J. J., 1849: 367.

Type species.

Diontolobus punctipennis Solier, 1849 [by monotypy]

Léveillé, A. 1910: 27. Crowson, R. A. 1964a: 291. Kolibáč, J. 2005: 53 (redescription). Kolibáč, J. 2006: 111 (phylogeny)

Micropeltis Redtenbacher, 1867 [Type species: Micropeltis serraticollis Redtenbacher, 1867; by monotypy]

Léveillé, A. 1910: 27 (synonymized?). Reitter, E. 1876: 58

Description.

Body size: about 3.0-4.0 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. Epicra nial acumination absent. Lacinial hooks absent. Galea: shape sub-clavate. Galea: ciliate setae absent. Mediostipes-Lacinia not 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 present. Ventral furrow present. Basal notch moderate. Labrum-Cranium not fused. Epipharyngial sclerite absent. Lateral tormal process: projection projection curved upwards ( Colydiopeltis ). Ligula: ciliate setae absent. Ligula membranous, not retroflexed, deeply emarginate. Hypopharyngeal sclerite H-shaped. Antenna 11-segmented. Antennal club weakly asymmetrical, sensorial fields absent. Front coxal cavities externally closed, 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 three parts.

Larva: Frontal arms curved (cucujoid). Epicranial stem absent. Endocarina absent. Gular sutures conspicuous, parallel. Paragular sclerites absent. Hypostomal rods absent. Stemmata number: five. Mandibular apical teeth number: two, horizontally situated. Lacinia mandibulae plumose. Mola present. Maxillary palpi 3-segmented. Pedunculate seta absent. Mala simple. Cardo-Stipes not fused. Ligula present. Labial palpi 2-segmented. Prementum in single part. Antenna 1st transverse, 2nd elongate. Sensory appendix medium sized (to half of joint 3). Thoracic sclerites pattern (dorsally) 0+0+0. Abdominal segment IX not divided. Tergite IX flat. Urogomphi present, hooked; median process absent.

Biology.

The species occur on flowers. Pollen grains were found in the gut of Diontolobus punctipennis ( Crowson 1964a).

Distribution.

As same as in Decamerus , the central part of Chile, approximately regions IV to VI.

Species:

Diontolobus costulata Reitter, 1876; Chile (AL)

Léveillé, A. 1910: 27. Reitter, E. 1876: 60 ( Micropeltis costulata Reitter, 1876)

Diontolobus flavolimbata Reitter, 1877; Chile (AL)

Léveillé, A. 1910: 27

Diontolobus inaequalis Reitter, 1877; Chile (AL)

Léveillé, A. 1910: 28

Diontolobus incostata Reitter, 1876; Chile (AL)

Léveillé, A. 1910: 28. Reitter, E. 1876: 59 ( Micropeltis incostata Reitter, 1876)

Diontolobus lanuginosa Léveille, 1895; Chile (AL)

Léveillé, A. 1910: 28

Diontolobus punctipennis Solier, 1849; Chile (AL)

Léveillé, A. 1910: 28. Kolibáč, J. 2005: 53 (redescription). Reitter, E. 1876: 59 (syn. Micropeltis serraticollis Redtenbacher, 1867, synonymized by Léveillé 1910?)

Diontolobus punctipennis var. lateritius Fairmaire, 1883: 488

Diontolobus sp. (supposed larva); Chile (RAC)

Crowson, R. A. 1964a: 291. Kolibáč, J. 2006: 106

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.