Published April 16, 2026 | Version v1
Taxonomic treatment Open

Leielmis Deleve 1964

  • 1. Plant Science and Biodiversity Center, Slovak Academy of Sciences, Dúbravská cesta 9, SK- 84523, Bratislava, Slovakia.
  • 2. Department of Life Sciences, Natural History Museum, London, SW 7 5 BD, UK. & National Geographic Okavango Wilderness Project, Wild Bird Trust, Parktown 2193, South Africa.

Description

Genus Leielmis Delève, 31964

Figs 2C, 5C, 8D, 12C, 14L

Leielmis Delève, 1964: 159.

Type species

Helmis georyssoides Grouvelle, 1890.

Differential diagnosis

Leielmis is characterized by the combination of the following characters: 1) body (Figs 2C, 8D) obovate; 2) antennae with segments 3–10 filiform; segment 11 longer; 3) surface of the pronotum (Figs 2C, 5C, 8D) moderately smooth to glabrous, micropunctured; lateral margin in some species with a row of spaced out granules; anterolateral angles feebly produced; sides broadly narrowing from base to prolonged anterior margin; carinae absent; median groove absent; 4) surface of the elytra (Figs 2C, 8D) moderately smooth to glabrous; sides broadly narrowing into rounded apex; carinae absent; intervals nearly flat; 5) prosternum moderately short in front of procoxae; anterior margin medially broadly emarginate, laterally slightly lowered, without distinct indentation; prosternal process wide, with broadly rounded apex (Fig. 12C); 6) legs with femora stout, tarsal claws (Fig. 14L) simple.

Similar genera

Leielmis could be confused with Peloriolus due to their smaller, compact body size, mostly simple pronotum, and similar moderately short, medially emarginate prosternum with a wide prosternal process. However, the sides of the pronotum in Leielmis broadly narrow from the base to the prolonged anterior margin, whereas in Peloriolus, the sides are subparallel in the basal third before narrowing.

Larva

Unknown.

Distribution

Endemic to South Africa. The record from Angola is omitted (see Discussion).

Known species

Leielmis armipes Bilton, 2018; Lei. georyssoides (Grouvelle, 1890); Lei. gibbosus Bilton, 2017; Lei. hirsutus Bilton, 2017.

Notes

Published as part of Linský, Marek & Matsumoto, Keita, 2026, Generic review and key to all Afrotropical genera of the subfamily Elminae (Coleoptera: Elmidae), pp. 1-80 in European Journal of Taxonomy 1050 on pages 21-22, DOI: 10.5852/ejt.2026.1050.3251, http://zenodo.org/record/19627835

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Linked records

Additional details

Biodiversity

Scientific name authorship
Deleve
Kingdom
Animalia
Phylum
Arthropoda
Order
Coleoptera
Family
Elmidae
Genus
Leielmis
Taxon rank
genus
Taxonomic concept label
Leielmis Deleve, 1964 sec. Linský & Matsumoto, 2026

References

  • Deleve J. 1964. Contribution a l'etude des Dryopoidea. VIII. Cinq nouveaux genres d'Elminthidae (Coleoptera) de l'Afrique australe. Bulletin & Annales de la Societe royale d'Entomologie de Belgique 100 (12): 155-176.
  • Bilton D. T. 2018. A new species of Leielmis Deleve, 1964, with a revised key to members of the genus (Coleoptera: Elmidae). Zootaxa 4441 (3): 592-596. https://doi.org/10.11646/zootaxa.4441.3.11
  • Bilton D. T. 2017. A revision of the South African riffle beetle genus Leielmis Deleve, 1964 (Coleoptera: Elmidae). Zootaxa 4254 (2): 255-268. https://doi.org/10.11646/zootaxa.4254.2.6