Strumigenys tigrilla

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Strumigenys tigrilla
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Attini
Genus: Strumigenys
Species: S. tigrilla
Binomial name
Strumigenys tigrilla
(Brown, 1973)

Strumigenys tigrilla casent0900069 p 1 high.jpg

Strumigenys tigrilla casent0900069 d 1 high.jpg

Specimen Labels

Known from a small number of litter samples from rainforest.

Identification

Bolton (2000) - A member of the mandibularis complex in the Strumigenys emarginata group. Characters of mandibularis-complex. Entire body broadly banded black and yellow. Cephalic dorsum without standing hairs. Basigastral costulae arise across entire width of tergite, rather than radiating from each side of a central gap. Ventral spongiform crest of petiolar peduncle absent between insertion and node.

Bolton (1983) - Rendered very distinctive by its conspicuous black and yellow colour pattern, tigrilla is also characterized by its lack of dorsal pilosity, rugulose-costulate postpetiolar dorsum, basigastral costulae which arise in a continuous row without a central clear area, and evenly sculptured dorsal alitrunk.

Keys including this Species

Distribution

Latitudinal Distribution Pattern

Latitudinal Range: 6.5° to 3.383333333°.

 
North
Temperate
North
Subtropical
Tropical South
Subtropical
South
Temperate

Distribution based on Regional Taxon Lists

Afrotropical Region: Cameroun, Central African Republic, Gabon, Ghana, Ivory Coast (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

Template:Strumigenys

Castes

Images from AntWeb

Strumigenys tigrilla casent0900069 h 2 high.jpg
Paratype of Miccostruma tigrillaWorker. Specimen code casent0900069. Photographer Will Ericson, uploaded by California Academy of Sciences. Owned by NHMUK, London, UK.

Nomenclature

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

  • tigrilla. Miccostruma tigrilla Brown, 1973a: 32, figs. 1, 2 (w.) IVORY COAST. Combination in Smithistruma: Bolton, 1983: 284; in Pyramica: Bolton, 1999: 1673; in Strumigenys: Baroni Urbani & De Andrade, 2007: 129. See also: Bolton, 2000: 306.

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

Description

Worker

Bolton (1983) - TL 2.0-2.2, HL 0.56-0.62, HW 0.48-0.51, CI 82-88, ML 0.05-0.06, MI 9-11, SL 0.23-0.26, SI 48-52, PW 0.30-0.32, AL 0.55-0.62 (4 measured).

Dentition of mandibles apparently as described under mandibularis. Anterior clypeal margin very broadly and deeply arched-concave, the excavation semicircular in full-face view and the concave margin with 5 pairs of projecting scale-like to spatulate small hairs which are curved medially. Sides of clypeus weakly convergent anteriorly, equipped with a fringe of freely projecting large spatulate to spoon-shaped hairs which are curved anteriorly. Because of the width and depth of the clypeal concavity the anterolateral angles seem narrow and strongly prominent anteriorly. Dorsum of clypeus and cephalic dorsum with widely scattered decumbent to appressed anteriorly directed minute flattened hairs which are very inconspicuous; without standing hairs of any description. Antennae with 4 segments. Scape narrow basally but then the leading edge suddenly broadened into a large anteriorly prominent rounded lobe. Leading edges of scape with a row of large freely projecting spatulate to spoon-shaped hairs. Maximum diameter of eye 0.14-16 X HW. Cephalic dorsum densely and quite Sharply reticulate-punctate, the posterior clypeus similarly but more finely sculptured, the sculpture tending to fade out towards the anterior clypeal margin. Pronotal dorsum more or less flat transversely, the dorsum meeting the sides in a bluntly rounded angle. Pronotum without a median longitudinal ridge or carina. With alitrunk in profile the mesonotum forming a shallow convexity which is separate from the pronotum and propodeum. Metanotal groove extremely feebly marked by an impression, its location more obviously indicated by a change of colour. Propodeal teeth without any portion which is free of the infradentallamella. Dorsal surfaces of alitrunk, petiole, postpetiole and first gastral tergite without standing hairs of any description, only with minute appressed slightly flattened pubescence which is very sparse. Gastral tergites behind the first with weakly clavate hairs. Sides of alitrunk mostly smooth, with marginal punctation. Dorsal surfaces of alitrunk, petiole and postpetiole finely and densely reticulate-punctate to granular, the postpetiole also with fine longitudinal costulae or rugulae at least on the anterior half of the disc. Spongiform appendages of pedicel segments only moderately developed in profile, the ventral appendage of the petiole represented only by a small posteroventral lobe below the node. In dorsal view the petiole node with a narrow posterior strip and the postpetiole with an anterior strip of about the same width or even narrower. Posterior margin of postpetiole with a spongiform strip which is broadest laterally and very narrow or even interrupted medially. Posteromedian area of postpetiole disc impressed. Base of first gastral tergite with a narrow spongiform strip which is concave anteromedially. Basigastral costulae arising right across the base of the first tergite, without a broad central gap. Mandibles, clypeus and antennae yellow; remainder of head black. Pronotum, mesonotum and forelegs yellow; propodeum, pleurae, middle and hind coxae black. Middle and hind femora dusky at least basally, remainder of legs yellow. Petiole and postpetiole black. Basal third of first gastral tergite yellow or yellowish white, the rest of the gaster black.

Type Material

Bolton (1983) - Holotype worker, Ivory Coast: nr Divo, 18.iii.1963, berlesate from rain forest leaf litter (L. Brader); and paratype worker, Banco Forest Res., nr Abidjan, circuit 1, i.1963, berlesate from rain forest leaflitter (W. L. Brown) (Museum of Comparative Zoology; The Natural History Museum) [examined].

References

References based on Global Ant Biodiversity Informatics

  • Belshaw R., and B. Bolton. 1994. A survey of the leaf litter ant fauna in Ghana, West Africa (Hymenoptera: Formicidae). Journal of Hymenoptera Research 3: 5-16.
  • Belshaw R., and B. Bolton. 1994. A survey of the leaf litter ant fauna in Ghana, West Africa (Hymenoptera: Formicidae). Journal of Hymenoptera Research. 3: 5-16.
  • Bolton B. 1983. The Afrotropical dacetine ants (Formicidae). Bulletin of the British Museum (Natural History). Entomology 46: 267-416.
  • Bolton, B. 2000. The Ant Tribe Dacetini. Memoirs of the American Entomological Institute 65
  • Kone M., S. Konate, K. Yeo, P. K. Kouassi, and K. E. Linsenmair. 2012. Changes in ant communities along an age gradient of cocoa cultivation in the Oumé region, central Côte d’Ivoire. Entomological Science 15: 324–339.
  • Yeo K., T. Delsinne, S. Komate, L. L. Alonso, D. Aidara, and C. Peeters. 2016. Diversity and distribution of ant assemblages above and below ground in a West African forest–savannah mosaic (Lamto, Cote d’Ivoire). Insectes Sociaux DOI 10.1007/s00040-016-0527-6