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Byrrhidiini Davis, Deschodt & Scholtz 2019, new tribe
- Publication Year :
- 2019
- Publisher :
- Zenodo, 2019.
-
Abstract
- Tribe Byrrhidiini Davis, Deschodt & Scholtz, new tribe Type genus. Byrrhidium Harold, 1869, here designated (Figs. 1, 4). Head. Punctate; anterior clypeal margin often with forklike small to large teeth protruding anteriorly; single very small median tooth on lower margin of clypeus; never with a horn on the frons or vertex; antenna nine segmented; mouthparts varying between genera but labrum always strongly sclerotized apically, inside margins of glossae with sclerotized denticles. Pronotum. Pronotum convex, with sub-parallel sides; punctation indistinct. Elytra. Convex; fused without humeral umbones; elytra with seven to eight feebly visible striae followed by an acute sub-lateral pseudoepipleural carina and inflexed pseudepipleuron; interstriae intervals flat; metathoracic wings absent; scutellum not visible from above. Sterna. Smooth to punctate; sutures well defined. Protibia. With a terminal spur; two or three denticles on anterior outside margin; posterior outside margin serrated or smooth; tarsi short. Meso- and metatibia. Unmodified, long and thin; each meso-and metatarsus of uniform width, often setate. Pygidium. Somewhat convex; punctate. Aedeagus. Phallobase unmodified; parameres symmetrical and extremely variable. Body size. Small to medium with size varying between 4.9 mm �� 3.8 mm for the smallest and 11.8 mm �� 7.5 mm for the largest known species. Diagnosis and known distribution. The Byrrhidiini new tribe, can be distinguished from all other dung beetle tribes by the combination of the following characters: flightless with body medium sized, sparsely setate and strongly convex; antennae nine segmented; labrum sclerotized apically, inside margins of glossae with sclerotized denticles; punctures on pronotum visible but indistinct; an acute sub-lateral pseudoepipleural carina and inflexed pseudepipleuron; striae and punctures on the elytra indistinctly visible; no humeral umbone visible; scutellum not visible from above; unmodified meso- and metatibiae of the same width; distributed in the arid to hyper-arid region along the southwest seaboard of Namibia and South Africa between about 21 and 31 degrees south with most known species occurring in Namibia (Fig. 4).<br />Published as part of Davis, Adrian L. V., Deschodt, Christian M. & Scholtz, Clarke H., 2019, Defining new dung beetle tribes to resolve discrepancies between phylogeny and tribal classification in the subfamily Scarabaeinae (Coleoptera: Scarabaeidae), pp. 131-144 in Zootaxa 4608 (1) on pages 134-136, DOI: 10.11646/zootaxa.4608.1.7, http://zenodo.org/record/3993625
- Subjects :
- Coleoptera
Insecta
Arthropoda
Animalia
Biodiversity
Scarabaeidae
Taxonomy
Subjects
Details
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....2b9e40af816e81308f5522669676091d
- Full Text :
- https://doi.org/10.5281/zenodo.4327858