Strumigenys tanymastax

Little is known about the biology of this species. A few workers were collected from litter sampling in dry chaco.

Identification
The only member of the Strumigenys tanymastax-group.

Distribution based on Regional Taxon Lists
Neotropical Region: Brazil, Paraguay, Venezuela.

Nomenclature

 *  tanymastax. Smithistruma tanymastax Brown, 1964a: 183, pl. 16, fig. 1 (w.) BRAZIL. Combination in Pyramica: Bolton, 1999: 1673; in Strumigenys: Baroni Urbani & De Andrade, 2007: 128. See also: Bolton, 2000: 241.

Worker
Bolton (2000) - TL 1.6-1.8, HL 0.44-0.48, HW 0.30-0.33, CI 68-71, ML 0.11-0.12, MI 25-27, SL 0.25-0.28, SI 82-88, PW 0.20-0.24, AL 0.43-0.47 (4 measured).

Apicoscrobal hair long, fine and flagellate; cephalic dorsum above apicoscrobal hair with an erect elongate fine hair that is quite distinct from the ground-pilosity. Ground-pilosity of cephalic dorsum of long curved hairs that are simple to narrowly spatulate, much longer and narrower than those on the clypeus. Eye with 3-6 ommatidia in total. Dorsum of head and alitrunk, and declivity of propodeum, reticulate-punctate. Pleurae and side of propodeum smooth and shining. Ground-pilosity of dorsal alitrunk of long medially-curved hairs, the mesonotum also with a pair of very long fine flagellate hairs. Fine curved to flagellate hairs also occur on dorsal surfaces of waist segments and first gastral tergite. Dorsal (outer) surfaces of hind tibiae with narrowly spatulate curved hairs that are all directed toward the apex. Petiole node weakly punctate dorsally, broader than long; postpetiole much broader than long and glassy smooth. Basigastral costulae sharply defined and evenly spaced, the tergite between and behind them smooth and shining.

Type Material
Bolton (2000) - Holotype worker, BRAZIL: Santa Catarina, Nova Teutonia, 300-500 m., (F. Plaumann) ; paratype worker, BRAZIL: SC, Chapecó, v. 1957 (F. Plaumann). [examined].