Chasmogenus Sharp 1882
Creators
Description
Genus Chasmogenus Sharp, 1882
Note. Two species of the genus Chasmogenus are known from Japan, but immature stages of these Japanese species are unknown. However, judging from a description of C. nitescens (Fauvel, 1883) from Australia (ANDERSON 1976, as ‘ Helochares nitescens ’; described mainly according to third instar larvae), the third instar larvae of Chasmogenus should be distinguished from the larvae of remaining Japanese Acidocerini by the following characters: (1) frontal lines V-shaped; (2) clypeolabrum almost symmetrical (ANDERSON 1976: Fig. 9); (3) nasale with five equally large teeth, almost symmetrical (ANDERSON 1976: Fig. 9); (4) mandibles asymmetrical, left mandible with one tooth, right mandible with two teeth (ANDERSON 1976: Fig. 9); (5) abdominal segments with spinose prolegs.
Notes
Files
Files
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Linked records
Additional details
Identifiers
Biodiversity
- Family
- Hydrophilidae
- Genus
- Chasmogenus
- Kingdom
- Animalia
- Order
- Coleoptera
- Phylum
- Arthropoda
- Scientific name authorship
- Sharp
- Taxon rank
- genus
- Taxonomic concept label
- Chasmogenus Sharp, 1882 sec. Minoshima & Hayashi, 2011
References
- FAUVEL A. 1883: Les Coleopteres de la Nouvelle-Caledonie et depandances avec descriptions, notes et synonymies nouvelles. Revue d'Entomologie 2: 335 - 360.
- ANDERSON J. M. E. 1976: Aquatic Hydrophilidae (Coleoptera). The biology of some Australian species with descriptions of immature stages reared in the laboratory. Journal of the Australian Entomological Society 15: 219 - 228.