Strumigenys dentinasis

AntWiki: The Ants --- Online
Strumigenys dentinasis
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Attini
Genus: Strumigenys
Species: S. dentinasis
Binomial name
Strumigenys dentinasis
(Kempf, 1960)

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Specimen Labels

Nothing is known about the biology of Strumigenys dentinasis.

Identification

Bolton (2000) - A member of the Strumigenys splendens-group. This striking species is immediately diagnosed by its possession of an anteriorly inclined anteromedian tooth on the clypeal dorsum. It is closest related to Strumigenys abditivata but in that species the dorsal clypeus is toothless, the mandibles are densely sculptured, the pronotal humeri lack hairs and are not sharply angulate, and the lateral lobe of the petiole is thin and lamellate rather than distinctly spongiform.

Keys including this Species

Distribution

Latitudinal Distribution Pattern

Latitudinal Range: -23.2508° to -23.251°.

 
North
Temperate
North
Subtropical
Tropical South
Subtropical
South
Temperate

Distribution based on Regional Taxon Lists

Neotropical Region: Brazil (type locality).

Distribution based on AntMaps

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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

Explore-icon.png Explore Overview of Strumigenys biology 
Strumigenys were once thought to be rare. The development and increased use of litter sampling methods has led to the discovery of a tremendous diversity of species. Many species are specialized predators (e.g. see Strumigenys membranifera and Strumigenys louisianae). Collembola (springtails) and other tiny soil arthropods are typically favored prey. Species with long linear mandibles employ trap-jaws to sieze their stalked prey (see Dacetine trap-jaws). Larvae feed directly on insect prey brought to them by workers. Trophallaxis is rarely practiced. Most species live in the soil, leaf litter, decaying wood or opportunistically move into inhabitable cavities on or under the soil. Colonies are small, typically less than 100 individuals but in some species many hundreds. Moist warm habitats and micro-habitats are preferred. A few better known tramp and otherwise widely ranging species tolerate drier conditions. Foraging is often in the leaf litter and humus. Workers of many species rarely venture above ground or into exposed, open areas. Individuals are typically small, slow moving and cryptic in coloration. When disturbed individuals freeze and remain motionless. Males are not known for a large majority of species.

Castes

Nomenclature

The following information is derived from Barry Bolton's Online Catalogue of the Ants of the World.

  • dentinasis. Gymnomyrmex dentinasis Kempf, 1960f: 450, figs. 24, 26, 30 (w.) BRAZIL. Combination in Pyramica: Bolton, 1999: 1672; in Strumigenys: Baroni Urbani & De Andrade, 2007: 118. See also: Bolton, 2000: 232.

Unless otherwise noted the text for the remainder of this section is reported from the publication that includes the original description.

Description

Worker

TL 2.6-2.8, HL 0.76-0.78, HW 0.62-0.66, CI 82-85, ML 0.06-0.07, MI 8-9, SL 0.30-0.32, SI 46-52, PW 0.34-0.37, AL 0.74-0.82 (4 measured).

Midline of clypeal dorsum, just behind the anterior margin, with an acute tooth that is inclined forward; the tooth very conspicuous in profile. In full-face view frontal lobes and frontal carinae considerably expanded laterally, the preocular carinae not visible. Outer edges of upper scrobe margins evenly divergent posteriorly, not sinuate. Frontal lobe with a small fenestra immediately above the antennal insertion, each expanded frontal carina with two much larger fenestrae behind this. Dorsolateral margins of head without freely projecting hairs of any form; cephalic dorsum without standing hairs. Vertex smooth and shining but some weak sculpture present on upper scrobe margins. Pronotal dorsum transversely flat, sharply marginate dorsolaterally; pronotal humerus sharply angulate and with a simple curved humeral hair. Dorsal pronotum otherwise without standing hairs; mesonotum with two pairs of short standing hairs. First gastral tergite with simple short standing hairs arising on the whole surface. Short decumbent to appressed fine hairs present on middle and hind tibiae. Discs of petiole and postpetiole unsculptured, the lateral lobe of the petiole distinctly spongiform.

Type Material

Holotype worker and paratype worker, BRAZIL: Parana, Rio Azul, 1000 m., x.1959, no. 3150 (F. Plaumann) (Museu de Zoologia da Universidade de Sao Paulo, Museum of Comparative Zoology, The Natural History Museum) [examined].

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. 1999. Ant genera of the tribe Dacetonini (Hymenoptera: Formicidae). Journal of Natural History. 33:1639-1689. (page 1672, combination in Pyramica)
  • Bolton, B. 2000. The ant tribe Dacetini. Memoirs of the American Entomological Institute. 65:1-1028. (page 232, redescription of worker)
  • Kempf, W. W. 1960f. Miscellaneous studies on Neotropical ants (Hymenoptera, Formicidae). Stud. Entomol. (n.s.) 3:417-466. (page 450, figs. 24, 26, 30 worker described)
  • Kempf, W. W. 1972b. Catálogo abreviado das formigas da regia~o Neotropical. Stud. Entomol. 15:3-344. (page 116, catalogue)

References based on Global Ant Biodiversity Informatics

  • Kempf W. W. 1978. A preliminary zoogeographical analysis of a regional ant fauna in Latin America. 114. Studia Entomologica 20: 43-62.
  • Silva R.R., and C. R. F. Brandao. 2014. Ecosystem-Wide Morphological Structure of Leaf-Litter Ant Communities along a Tropical Latitudinal Gradient. PLoSONE 9(3): e93049. doi:10.1371/journal.pone.0093049
  • Silva T. S. R., and R. M. Feitosa. 2019. Using controlled vocabularies in anatomical terminology: A case study with Strumigenys (Hymenoptera: Formicidae). Arthropod Structure and Development 52: 1-26.