Strumigenys integra

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

The type material was collected in dry seasonal forest.

Identification

Bolton (2000) - A member of the Strumigenys scotti-group. A larger species than Strumigenys yanintra, with a distinctly swollen postpetiole disc. The mandibles tend to be straighter in integra and their outer margins are approximately straight.

Keys including this Species

Key to Strumigenys of East Asia

Distribution

Distribution based on Regional Taxon Lists

Indo-Australian Region: Indonesia (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.

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.

Biology

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.

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Castes

Nomenclature

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

integra. Strumigenys integra Bolton, 2000: 899, fig. 476 (w.) INDONESIA (Timor).

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 2.5, HL 0.62, HW 0.48, CI 77, ML 0.30, MI 48, SL 0.38, SI 79, PW 0.28, AL 0.62. Fully closed mandibles in full-face view with outer margins approximately straight, not obviously bowed outwards. Proximal preapical tooth on left mandible almost twice as long as distal; space separating the two slightly less than length of distal preapical tooth. Maximum width of scape about equal to maximum diameter of eye. Erect hairs on first gastral tergite short and stiff, many of them slightly expanded apically. Side of alitrunk reticulate-punctate except for a clear patch on katepisternum. Postpetiole disc swollen, with fine reticulate-punctate sculpture and very faint longitudinal striolae; sculpture weakest anteromedially where it is partially effaced. In profile ventral spongiform lobe of postpetiole smaller than the exposed cuticle of the swollen disc.

Paratypes. TL 2.5-2.6, HL 0.60-0.64, HW 0.46-0.48, CI 75-78, ML 0.30, MI 47-50, SL 0.37-0.39, SI 79-85, PW 0.26-0.28, AL 0.60-0.64 (5 measured). As holotype but sculpture may be effaced along the mid-dorsal longitudinal strip of the postpetiole disc, especially anteriorly.

Type Material

Holotype worker, Indonesia: W Timor, 13.8 km. N of Soe, 1100 m., dry seasonal forest, 14.viii.1990, F90021 (Agosti & Weintraub) (Musee d'Histoire Naturelle Genève). Paratypes. 14 workers with same data as holotype (MHNG, The Natural History Museum, Museum of Comparative Zoology).

References

Bolton, B. 2000. The ant tribe Dacetini. Memoirs of the American Entomological Institute. 65:1-1028. (page 899, worker described)

References based on Global Ant Biodiversity Informatics

Bolton B. 2000. The ant tribe Dacetini. Memoirs of the American Entomological Institute 65: 1-1028.