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Extant: 3 valid subspecies
P. niger; thorace elongato, supra planato, dentibus duobus parvis antice et postice armato; abdominis pedunculo unispinoso.
Worker. Length 3 1/2 lines. Black; delicately rugulose; the eyes ovate, lateral, placed high on the sides of the head; the front with two raised carinae, at the sides of which the antennae arc inserted; the clypeus and the space between the antennae, rufo-piceous; the clypeus with a slight longitudinal carina; the mandibles obscurely rufopiceous at their apex; the apical joint of the antennae ferruginous. Thorax elongate, compressed at the sides, and flattened above; the anterior portion longitudinally aciculate; the meso- and meta-thorax delicately rugulose; a short blunt tooth or spine on each side of the prothorax, and a similar, but more acute tooth at the superior angles of the metathorax; the legs elongate, without spines or hair's; the tips of the claw-joint of the tarsi ferruginous. Abdomen smooth and shining; the peduncle with a single acute spine above, and a minute tooth on each side at its base.
Type specimens: Holotype of Polyrhachis textor: casent0901849