Strumigenys eversa

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Strumigenys eversa
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Attini
Genus: Strumigenys
Species: S. eversa
Binomial name
Strumigenys eversa
Bolton, 2000

Known from a few litter collections: the type from oak/alder/pine forest, a worker from wet oak, and a worker from cloud forest.

Identification

Bolton (2000) - A member of the Strumigenys emeryi-group. Currently this is the only known species of the group that has the entire side of the alitrunk reticulate-punctate and the postpetiole disc densely costulate. It is close to Strumigenys emeryi but lacks flagellate gastral hairs, does not have a broad lamella on the propodeal declivity, and has a much shallower ventral sponigiform strip on the petiole.

Keys including this Species

Distribution

Distribution based on Regional Taxon Lists

Neotropical Region: Mexico (type locality).

Distribution based on AntMaps

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Distribution based on AntWeb specimens

Check data from AntWeb

Biology

Castes

Nomenclature

The following information is derived from Barry Bolton's New General Catalogue, a catalogue of the world's ants.

  • eversa. Strumigenys eversa Bolton, 2000: 514 (w.) MEXICO.

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 2.7, HL 0.65, HW 0.54, CI 83, ML 0.41, MI 63, SL 0.46, SI 85, PW 0.31, AL 0.66. Mandible with a small preapical tooth close to the apicodorsal tooth; proximally also with a minute denticle. Apicoscrobal hair short and truncated on right side, absent from left (damage to right side hair is suspected, in undamaged specimens this hair is probably flagellate). Both pairs of standing hairs on cephalic dorsum simple. Pronotal humeral hair long and flagellate, and an erect flagellate pair on mesonotum. All hairs on waist segments and first gastral tergite short and shallowly curved, simple or slightly flattened at their apices. Pronotal dorsum reticulate-punctate and with fine longitudinal rugulae. Pleurae and side of propodeum entirely reticulate-punctate, without smooth areas. Propodeal spines subtended by fine carinae rather than by lamellae, with a small rounded lobe at base of declivity and without propodeal lacuna. Petiole node in dorsal view broader than long, reticulate-punctate. In profile ventral surface of petiole with a very narrow spongiform strip that commences at about midlength of peduncle and extends posteriorly, gradually deepening to its maximum depth beneath the posteroventral angle, but even here it is still shallow. Disc of postpetiole finely and densely longitudinally costulate over its entire surface. Basigastral costulae slightly longer than postpetiole disc.

Type Material

Holotype worker, Mexico: Oaxaca, 5.1 km. S Suchixtepec, 2150 m., 25.vii.1992, oak/alder/pine forest litter berlese, # 92-026 (R. S. Anderson) (The Natural History Museum).

References

  • Bolton, B. 2000. The ant tribe Dacetini. Memoirs of the American Entomological Institute. 65:1-1028. (page 514, worker described)