Holcoponera extra

Nothing is known about the biology of .

Identification
A member of the porcata subgroup (in the striatula species group). This species has a fairly pointed petiolar node apex, but it doesn’t approach the extremely pointed condition of Gnamptogenys acuta. The node is more robust and subquadrate (lateral view) than in other porcata subgroup species and is reminiscent of the condition in G. tortuolosa. This species could be closely related to Gnamptogenys striatula on account of the node shape (erect) and the lacking anterior peduncle. (Lattke 1995)

Key to New World Gnamptogenys Species

Distribution based on Regional Taxon Lists
Neotropical Region: Colombia, Ecuador.

Nomenclature

 *  extra. Gnamptogenys extra Lattke, 1995: 167, figs. 45-47 (w.) ECUADOR.

Worker
Holotype (Paratypes) measurements: HL 1.20 (1.10-1.12); HW 1.00 (0.94-l.00); ML 0.34 (0.30-0.34); ED 0.16 (0.14-0.18); SL 1.26 (l.00-1.20); WL l.68 (1.44-1.50) mm; CI 0.83 (0.85-0.98); SI 1.26 (1.06-1.20); IO 0.16 (0.15-0.19) n = 4.

With head in frontal view: vertexal margin straight, laterally convex with eyes slightly behind midlength, and anterior clypeal margin convex; mandibles triangular with dorsal striae; scapes relatively thick in appearance and surpassing vertexal margin; vertex with 2-3 transverse costulae; anterior pronotal face with 5-7 transverse costulae, dorsally with anteriorly arching costulae; costulae on mesonotal concentric or longitudinal; costulate on metanotum and dorsal propodeal face transverse to longitudinal, sometimes arched; declivitous propodeal face with longitudinal costulae that diverge posteriorly, basally with 2-3 transverse costulae.

Petiolar node in lateral view subquadrate, with broad anterodorsal convexity and sharp posterior drop with overhanging apex; subpetiolar apex is an anteriorly projecting lobe; anterior postpetiolar face with transverse costulae that arch back and become longitudinal posteriorly; rest of dorsal gastric costulae longitudinal, divergent on posterior postpetiolar sternum; ventral stridulitrum present on fourth abdominal segment. Scapes with abdundant decumbent pilosity and no suberect or subdecumbent hairs; decumbent pilosity also present on coxae and legs, with no standing hairs; sparse suberect hairs on rest of body. Body dark brown, legs and antennae slightly lighter.



Type Material
Holotype worker. Ecuador, Pichincha: Tinalandia, 16 km SE Santo Domingo de Los Colorados, VI-1976, S. & J. Peck, leg. Deposited in. Paratypes: (1) One worker with the same data as the holotype. Deposited in. (2) Two workers from Colombia, Choco: Lloro, Vereda Penaloza, 26-III-1988, V. Jaimes, leg. One worker in and, respectively.