Strumigenys dictynna
Strumigenys dictynna | |
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Scientific classification | |
Kingdom: | Animalia |
Phylum: | Arthropoda |
Class: | Insecta |
Order: | Hymenoptera |
Family: | Formicidae |
Subfamily: | Myrmicinae |
Tribe: | Attini |
Genus: | Strumigenys |
Species: | S. dictynna |
Binomial name | |
Strumigenys dictynna (Bolton, 2000) |
The type material was sampled from sifted litter.
Identification
Bolton (2000) – A member of the Strumigenys baudueri-group. The Afrotropical members of the group can be divided into two complexes on antennomere count. The central and west African species Strumigenys tacta and Strumigenys vodensa have 4, whilst the South African Strumigenys agnosta and dictynna have 6 antennomeres. The two South African species form a close pair, differentiated by the comparative table given under agnosta.
Keys including this Species
Distribution
Distribution based on Regional Taxon Lists
Afrotropical Region: South Africa (type locality).
Distribution based on AntMaps
Distribution based on AntWeb specimens
Check data from AntWeb
Countries Occupied
Number of countries occupied by this species based on AntWiki Regional Taxon Lists. In general, fewer countries occupied indicates a narrower range, while more countries indicates a more widespread species. |
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Estimated Abundance
Relative abundance based on number of AntMaps records per species (this species within the purple bar). Fewer records (to the left) indicates a less abundant/encountered species while more records (to the right) indicates more abundant/encountered species. |
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Biology
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Castes
Nomenclature
The following information is derived from Barry Bolton's Online Catalogue of the Ants of the World.
- dictynna. Pyramica dictynna Bolton, 2000: 294 (w.) SOUTH AFRICA. Combination in Strumigenys: Baroni Urbani & De Andrade, 2007: 118
Unless otherwise noted the text for the remainder of this section is reported from the publication that includes the original description.
Description
Worker
Holotype. TL 2.1, HL 0.53, HW 0.36, CI 68, ML 0.08, MI 16, SL 0.27, SI 75, PW 0.25, AL 0.56. Dorsum of clypeus with appressed small spatulate hairs that are directed anteromedially in the zone immediately behind the anterior margin, and directed medially behind this zone. Lateral margins of clypeus in full-face view without freely projecting haris but with a few appressed small spatulate hairs present. Ground pilosity of cephalic dorsum narrowly spatulate, decumbent to appressed. Standing hairs on cephalic dorsum restricted to a pair of long fine hairs close to the occipital margin medially and a more lateral pair that are directed dorsolaterally from close to the occipital corners. Dorsolateral margins of head in full-face view with a pair of flagellate hairs situated posteriorly on the occipital lobes. The dorsal pair of hairs at the occipital corners may also be visible in full-face view, projecting laterally behind the flagellate pair. Clypeus finely reticulate-punctate, the cephalic dorsum finely punctate-rugulose. A distinct longitudinal impression present dorsally, running from the posterior margin of the clypeus almost to the highest point of the vertex. Eye of moderate size, with 4 ommatidia across the greatest diameter. Pronotal dorsum with sparse vestigial traces of longitudinal costulae and faint scattered vestiges of punctulae; mostly shining. Mesonotum and anterior half of propodeal dorsum reticulate-punctate, the postpetiole glassy smooth. Propodeum armed with short triangular teeth subtended by a narrow lamella. Erect simple hairs present on dorsal alitrunk and waist segments; many appear feebly flagellate but some are truncated apically. Similar hairs present on first gastral tergite, most are truncated apically.
Paratypes. TL 2.0-2.1, HL 0.52-0.54, HW 0.36-0.38, CI 68-70, ML 0.08, MI 16-20, SL 0.26-0.29, SI 72-76, PW 0.23-0.25, AL 0.55-0.58 (8 measured).
Type Material
Holotype worker, South Africa: South Cape Prov., Tsitsikama, Lottering For. Res., 12.xii.1979, E-Y 1419, sifting (S. Endrody-Younga) (Transvaal Museum).
Paratypes. 11 workers with same data as holotype (TVM, South African Museum, The Natural History Museum, Museum of Comparative Zoology).
References
- Baroni Urbani, C. & De Andrade, M.L. 2007. The ant tribe Dacetini: limits and constituent genera, with descriptions of new species. Annali del Museo Civico di Storia Naturale “G. Doria”. 99:1-191.
- Bolton, B. 2000. The ant tribe Dacetini. Memoirs of the American Entomological Institute. 65:1-1028. (page 294, worker described)