Strumigenys marginiventris

Identification
Bolton (2000) - The sharp lateral marginations of the first gastral tergite are unique and immediately diagnostic of this species. Within the group marginiventris is the only species to have a broad convex lamella on the propodeal declivity, all other known species have merely a narrow concave carina.

Distribution based on Regional Taxon Lists
Neotropical Region: Colombia, Costa Rica, Honduras, Panama, Venezuela.

Nomenclature

 *  marginiventris. Strumigenys (Strumigenys) fusca st. marginiventris Santschi, 1931c: 275 (w.) PANAMA. Brown, 1958e: 127 (q.). Raised to species: Brown, 1958e: 126. See also: Bolton, 2000: 543.

Worker
Bolton (2000) - TL 2.8-3.1, HL 0.70-0.75, HW 0.55-0.59, CI 78-80, ML 0.54-0.56, MI 73-77, SL 0.53-0.60, SI 95-102, PW 0.30-0.35, AL 0.68-0.75. Preapical tooth small, slender and peg-like to tuberculiform, tending to arise from dorsum of mandible rather than from inner margin. Long flagellate hairs present: in apicoscrobal position; on pronotal humerus; a pair on mesonotum; several on dorsa of petiole and postpetiole; abundant on first gastral tergite. Cephalic dorsum with a single pair of erect simple hairs located near occipital margin. Propodeal teeth subtended by a broad lamella that has a shallowly convex posterior (free) margin. Petiole ventrally with a spongiform strip. First gastral tergite with a sharply raised longitudinal ridge or carina on each side that separates dorsal and lateral surfaces of tergite and extends almost entire length of sclerite. Head, alitrunk and waist segments reticulate-punctate, most surfaces usually also with some weak overlying low longitudinal rugulae. Behind basigastral costulae the first tergite punctulate-striolate, more posteriorly the sclerite densely punctulate; gastral sculpture variable in intensity.

Type Material
Bolton (2000) - Holotype worker, PANAMA: France Field (A. Bierig) [not seen].