Strumigenys finator

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

Strumigenys finator casent0005536 profile 1.jpg

Strumigenys finator casent0005536 dorsal 1.jpg

Specimen labels

Known from a small number of collections, all from litter samples in montane forest.

Identification

Bolton (2000) – A member of the scotti complex in the Strumigenys scotti-group. See notes under Strumigenys europs.

Keys including this Species

Distribution

Distribution based on Regional Taxon Lists

Malagasy Region: Madagascar (type locality).


Distribution based on AntMaps

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Distribution based on AntWeb specimens

Check data from AntWeb

Biology

Castes

Worker

Nomenclature

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

  • finator. Strumigenys finator Fisher, in Bolton, 2000: 681 (w.q.) MADAGASCAR.

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 2.8, HL 0.64, HW 0.50, CI 77, ML 0.29, MI 45, SL 0.37, SI 75, PW 0.30, AL 0.72. Characters of scotti-complex. Mandibles in full-face view with outer margins very shallowly and evenly convex, the width approximately constant from the level of the proximal preapical tooth to near the base. Apicoventral tooth of fork of mandible with a denticle located on its ventral surface near the base. Upper scrobe margin evenly and shallowly convex in full-face view, not bordered by a rim or flange except immediately behind the frontal lobes, the eyes visible, the apices of the upper scrobe margins confluent with the sides of the occipital lobes through an even curve, without an angle separating the two. Maximum diameter of eye slightly greater than maximum width of scape, with 4-5 ommatidia in longest row. Scape narrow and subcylindrical, shallowly and gently curved; hairs on leading edge narrow, subdecumbent to suberect, curved through entire length and thickened apically. Cephalic dorsum densely clothed with appressed, narrow filiform ground-pilosity, the upper scrobe margin fringed with hairs which are similar in shape and size to those on the leading edge of the scape. Cephalic dorsum with 6 stout standing narrowly clavate hairs arranged in a transverse row of 4 close to the occipital margin and a more anteriorly situated pair. Pronotal humeral hair long flagellate; humeral angles rounded, lateral margin of posterior pronotum with a marginate projection. Mesonotum with a pairs of stout narrowly remiform hairs on the anterior margin. Propodeum with one pair of short, fine, posteriorly curved hairs immediately anterior of propodeal spines. Dorsal alitrunk with sparse ground-pilosity that is similar in shape to pilosity on head. Dorsum of alitrunk in outline convex anteriorly and more or less flat posteriorly, the metanotal groove weekly impressed. Anterior mesonotum with a narrow flange above the mesothoracic spiracle; mesopleural gland set in a large circular notch. Propodeal tooth small, triangular, pointed apically, and subtended by an inconspicuous, very narrow lamellate ridge. Pronotal dorsum shiny, superficially longitudinally striolate. Mesonotal dorsum with striolate and punctate sculpture that appears almost effaced. Propodeal dorsum smooth and shiny. Sides of alitrunk glassy smooth, punctate peripherally. Dorsum of petiole node and postpetiole disc smooth and shiny. Spongiform appendages of waist segments greatly expanded; in profile the petiole with a well developed ventral strip. Basigastral costulae sharply defined, radiating on each side of a central clear area. Dorsal surface of petiole with a pair of standing hairs. postpetiole disc with three pairs of filiform hairs. Dorsal gaster with standing filiform hairs. Colour light brown.

Paratypes. TL 2.5-2.7, HL 0.57-0.64, HW 0.44-0.46, CI 72-77, ML 0.28-0.30, MI 46-49, SL 0.36-0.37, SI 81-83, PW 0.26-0.27, AL 0.65-0.69 (2 measured). As holotype.

Measurements of this material extend the range shown by the type-series: HL 0.51-0.58, HW 0.38-0.44, CI 74-76, ML 0.23-0.28, MI 46-49, SL 0.30-0.37, SI 80-84 (3 measured).

Type Material

Holotype worker, Madagascar: 12.2 km. WSW Befingotra, Res. Anjanaharibe-Sud, 14°45'S, 49°28'E, 1985 m., 25.xi.1994, sifted litter (leaf mold rotten wood), montane rainforest #1272 (23)-2 (B. L. Fisher) (Museum of Comparative Zoology).

Paratypes. 3 workers and 2 queens (dealate) with same data as holotype but coded (40)-2, (42)-2, (43)-2, (48)-2 (The Natural History Museum, South African Museum).

References

  • Fisher, B.L. 2000. The Malagasy fauna of Strumigenys. Pp. 612-696 in: Bolton, B. 2000. The ant tribe Dacetini. Memoirs of the American Entomological Institute. 65:1-1028. (page 681, worker described)