Pristomyrmex pulcher

This species has been collected from a litter sample taken in primary forest.

Identification
Wang (2003) - Worker. Lateral portions of clypeus in front of antennal fossae, developed, not reduced to margins, so that the antennal fossae are placed well behind the anterior clypeal margin; dorsal surfaces of head and alitrunk, as well as the sides of pronotum, with well-developed coarse rugoreticulum.

Although P. pulcher, an Oriental species, is very similar, in appearance of the workers, to Pristomyrmex punctatus, the two species are in fact not closely related within the punctatus group. Pristomyrmex pulcher, together with Pristomyrmex divisus, constitutes a clade that is the sister group of the clade formed by the species Pristomyrmex rigidus and P. punctatus. The separation of the two clades is summarized under P. divisus. Additional characters separating the workers of P. pulcher from those of P. punctatus are as follows: P. pulcher - A broad, short tooth present on the basal margin of mandible. Dorsum of petiole node with only a pair of erect hairs. Leg bicolored, with femur and tibia light-yellow and tarsus reddish-brown. Sculpture on the dorsal surfaces of head and alitrunk, and the sides of petiole and postpetiole relatively coarse Propodeal spines shorter, more robust, and slightly bent basally. P. punctatus - Tooth of the basal margin absent or inconspicuous. Dorsum of petiole node with two or more pairs of hairs. Leg uniformly colored, light-red or reddish-brown. Sculpture on the dorsal surfaces of head and alitrunk, and the sides of petiole and postpetiole relatively fine. Propodeal spines relatively slender, and straight. The separation of P. pulcher from P. divisus is discussed under P. divisus.

A member of the Punctatus species group

Distribution based on Regional Taxon Lists
Indo-Australian Region: Malaysia.

Castes
Only known from the worker caste.

Nomenclature

 *  pulcher. Pristomyrmex pulcher Wang, M. 2003: 408, figs. 87, 88 (w.) WEST MALAYSIA.

Worker
Holotype. TL 2.96, HL 0.76, HW 0.72, C1 95, SL 0.82, SI 114, EL 0.20, PW 0.53, AL 0.76.

TL 2.70-3.04, HL 0.70-0.77, HW 0.69-0.77, C1 95-100, SL 0.76-0.84, SI 103-114, EL 0.19-0.21, PW 0.50-0.54, AL 0.70-0.78, PPW 0.25-0.29, PPL 0.17-0.20, PP1 135-156 (11 = 11).

Mandibles usually with a few longitudinal rugae but smooth near the masticatory margin. Dentition of the masticatory margin of mandible: the strongest apical tooth + the second strongest preapical + a long diastema + a broad basal tooth usually fused by two small denticles. A broad-based triangular short tooth present about midway on the basal margin of the mandible. Clypeus with sculpture consisting of a strong median longitudinal carina, a transverse carina (sometimes curved or weak or broken), and a few additional short carinae. Anterior clypeal margin lacking distinct denticles. Lateral portions of clypeus, in front of antennal fossae, developed, not reduced to narrow margins. Ventral surface of clypeus usually with a somewhat "n" ruga that is sometimes interrupted at the middle. Palp formula 5,3. Frontal carinae strong, extending to the level of the posterior margins of eyes. Slightly impressed scrobal areas present lateral to the frontal carinae. Frontal lobes nearly absent; thus, the antennal articulations are completely exposed. Antennal scapes, when lying on the dorsal head, surpassing the occipital margin of head by one-sixth to one-fifth of their length. Eyes large and prominent, containing seven to nine ommatidia in the longest row. Occipital margin straight or feebly concave. In dorsal view, dorsum of the alitrunk marginated and rather depressed. Pronotum unarmed. Propodeal spines well developed, acute, and long, much longer than the distance between their bases. Metapleural lobes triangular. Dorsum of petiole peduncle, together with the anterior face of the node, forming a long declivity that reaches the apex of the node. Ventral surface of petiole without any appendages or with only a very narrow rim. Postpetiole in profile convex dorsally, in dorsal view transverse-rectangular and much broader than long. Dorsal surfaces of head and alitrunk, as well as the sides of pronotum, with developed coarse rugoreticulum. Sides of the rest of the alitrunk irregularly rugulose. Antennal scapes with a few longitudinal rugae. Sides of both petiole and postpetiole usually with a few coarse longitudinal rugae. In dorsal view, petiole and postpetiole each bounded by a rim; dorsal surfaces of petiole and postpetiole, except for rims, very smooth and polished. Gaster unsculptured. Dorsal surfaces of head and alitrunk with numerous erect or suberect hairs. A pair of similar hairs present bilaterally near the top of petiole and two pairs usually on the dorsal postpetiole. Two or three pairs of long, forward-projecting hairs present near the anterior clypeal margin. Scapes and tibiae with some scattered erect or suberect hairs. Gaster lacking erect or suberect hairs. Femurs, tibiae light-yellow, in contrast with head, antennae, alitrunk, tarsi, pedicel segments, and gaster, which are reddish-brown.

Type Material
Holotype Worker:. Malaysia: Negri Sembilan, Pasoh For. Res., primaly forest, litter sample, 3.iv.1994 (L. Ficken). Paratypes, 11 workers (BMNH,, ). Five workers with same data as holotype; three workers, Malaysia: Negri Sembilan, Pasoh For. Res., litter sample, 3.iv.1994 (M. Brendell, K. Jackson and L. Ficken); three workers, Malaysia: Neg. Sembilan, Pasoh For. Res., litter sample, xi.1994 (M. Brendell, K. Jackson, and S. Lewis).



References based on Global Ant Biodiversity Informatics

 * Zettel, H. 2006. On the ants of the Philippine Islands: 1. The genus Pristomyrmex Mayr, 1866. Myrmecologische Nachrichten 8: 59-68.