Baracidris sitra

The holotype and only known specimens of sitra seems to come from a leaf-litter sample. (Bolton 1981)

Identification
Similar to the also minute Baracidris meketra but can be separated by the anterior clypeal margin produced into a short truncated simple lobe and the occipital margin of head in full-face view transverse or exceedingly feebly convex, not indented or concave medially. Additionaly, sitra is slightly larger. (Bolton 1981)

Recognized by clypeus produced into a narrow truncated lobe, posterior margin of head not concave medially and body devoid of conspicuous hairs. (Fernández 2003)

Distribution based on Regional Taxon Lists
Afrotropical Region: Central African Republic, Gabon, Ivory Coast.

Nomenclature

 * . Baracidris sitra Bolton, 1981b: 256, fig. 14 (w.) GABON.
 * Type-material: holotype worker.
 * Type-locality: Gabon: Plateau d’Ipassa, VM9, IPA7 (J.M. Barra).
 * Type-depository: MCZC.
 * Status as species: Bolton, 1995b: 80; Fernández, 2003b: 36.
 * Distribution: Gabon.

Worker
Holotype. TL 2.0, HL 0.51, HW 0.44, CI 86, SL 0.31, SI 70, PW 0.31, AL 0.56.

Answering to the description of Baracidris meketra as regards general shape, sculpture etc., but differing as follows.

Anterior clypeal margin produced into a short truncated simple lobe. Occipital margin of head in full-face view transverse or exceedingly feebly convex, not indented or concave medially. Larger, more stockily built species with relatively broader head and shorter antennal scapes - compare standard measurements. Apart from these the lengths of apical and preapical funicular segments in sitra are 0.26, 0.07 respectively, and the dorsal lengths of promesonotum and propodeum are 0.35, 0.12 respectively. Petiole node in dorsal view slightly broader than long (0.13 by 0.10). Propodeal dorsum more strongly convex and the lamella linking the teeth to the metapleural lobes broader, minimum width of the lamella 0.06 (as opposed to 0.03 in meketra holotype).

Type Material
Holotype worker, Gabon: Plateau d'Ipassa, VM9, IPA 7 (J. A. Barra).

References based on Global Ant Biodiversity Informatics

 * Bolton B. 1981. A revision of six minor genera of Myrmicinae (Hymenoptera: Formicidae) in the Ethiopian zoogeographical region. Bulletin of the British Museum (Natural History). Entomology 43: 245-307.
 * Braet Y., and B. Taylor. 2008. Mission entomologique au Parc National de Pongara (Gabon). Bilan des Formicidae (Hymenoptera) recoltes. Bulletin S. R. B. E./K.B.V.E. 144: 157-169.
 * Fernández, F. 2003. Revision of the myrmicinae ants of the Adelomyrmex genus-group. Zootaxa 361: 1-52.