Paramycetophylax bruchi

Distribution based on Regional Taxon Lists
Neotropical Region: Argentina, Brazil.

Nomenclature

 *  bruchi. Sericomyrmex bruchi Santschi, 1916e: 383, fig. (w.) ARGENTINA. Combination in Myrmicocrypta (Mycetophylax): Santschi, 1922b: 355; in Paramycetophylax: Kusnezov, 1956: 24; in Mycetophylax: Santschi, 1923c: 268; Weber, 1958d: 262. Senior synonym of cristulata, emmae, pauper (and the omitted name simplex, see below): Klingenberg & Brandão, 2009: 27.
 * cristulata. Myrmicocrypta (Mycetophylax) cristulata Santschi, 1922b: 356 (w.q.m.) ARGENTINA. Combination in Mycetophylax: Santschi, 1929d: 304. Junior synonym of bruchi: Klingenberg & Brandão, 2009: 27.
 * simplex. Myrmicocrypta (Mycetophylax) bruchi var. simplex Santschi, 1922b: 355 (w.) ARGENTINA. Unnecessary replacement name: pauper Santschi, 1923c: 268.
 * pauper. Mycetophylax bruchi var. pauper Santschi, 1923c: 268. Unnecessary replacement name for simplex Santschi, 1922b: 355. [Previously junior secondary homonym of Cyphomyrmex simplex Emery, 1888c: 361, when both names had combinations in Mycetophylax.] Junior synonym of bruchi: Klingenberg & Brandão, 2009: 27.
 * emmae. Mycetophylax cristulatus var. emmae Santschi, 1929d: 304 (w.) BRAZIL. Junior synonym of bruchi: Klingenberg & Brandão, 2009: 27.

Description
Klingenberg & Brandão, 2009:

Worker
Range of measurements (in mm) and indices of examined specimens (N = 13): IOD 0.88-1.18; HL 0.82-1.10; CI 101-113; SL 0.67-0.87; SI 57-80; ML 0.47-0.58; MI 47-58; WL 1.25-1.73; PrW 0.53-0.70; PL 0.25-0.37; PPL 0.23-0.37; GL 0.90-1.18; FL 0.93-1.39; TL 3.93-5.82.

Measurements (in mm) and indices of Holotype (worker without gaster): IOD 1.00, HL 0.91, CI 110, SL 0.76, SI 76, ML 0,53, M 58, WL 1.48, PrW 0.62, PL 0.30, FL 0.93.

Color yellow to reddish-brown. Masticatory and external borders of mandible, margins of clypeus and carinae brownish. Under optical microscope, body sculpture densely reticulate with exception of dorsal discs of mandibles, where sculpture is finely striate. Whole body sparsely covered by golden shiny appressed hairs. Anterior margin of clypeus with five to nine fine, stiff, and long setae, reaching half the length of the mandibles; three median setae longer than lateral ones.

Head wider than long (see CI). Compound eyes set close to the middle of the head, with eleven ommatidia at maximum width and eight ommatidia at maximum length. Mandibles with eight to ten teeth, the two most apical teeth bigger than the others, followed by five to seven smaller triangular teeth and a last denticle. Anterior margin of clypeus slightly concave, almost straight, which bears a 6–8 long setae psamophore. In frontal view, clypeus attaining posteriorly the level of half the frontal lobes, in a rounded suture, followed by a weakly impressed triangular frontal area. Triangular shaped frontal lobes fully covering the antennal insertions. Glabrous area between antennal insertions and lateral carinae ending posteriorly at the level of posterior margin of the compound eyes. Sharp lateral carinae, almost vertical, marginate the anterior border of compound eyes. Vertexal margin concave, with a median impression and forming two lobes. Antennal scapes flattened, slightly curved; depending on degree of curving, reaching or slightly surpassing the posterolateral corners of the head. Apical end of funiculus with a three segmented club, wider than preceeding segments. The apical segment of funiculus as long as previous two segments together. Ventral face of head conspicuously flat.

Mesosoma. Pronotum with a pair of anterior blunt and low spines, and a pair of inferior spines, square in lateral view. Dorsal face of mesonotum with a small blunt low median protuberance anteriorly. Inferior margin of mesosoma bordered by a sharp translucent carina. In side view, dorsal face of mesonotum slightly concave in the middle, metapropodeal suture straight; propodeum with a pair of triangular anterior protuberances at the basal face, a pair of divergent, short, blunt narrow triangular spines at the meeting of basal and declivous faces, and declivous face almost vertical. Petiole compact; in lateral view peduncle very short, and dorsal margin of node gently sloping until two posterior low triangular corner-like protuberances, with a weakly developed ventral process. Postpetiole in dorsal view subquadrate, with rounded margins. In lateral view, sternite of postpetiole well defined, covering 2/3 of tergite surface.

Queen
Measurements (in mm) and indices of examined specimen (N = 1): IOD 1.50; HL 1.36; CI 110; SL 1.01; SI 67; ML 0.57; MI 42; WL 2.05; PL 0.52; PPL 0.49; GL 2.10; TL 7.09.

Color, pilosity and main morphological character traits of head, propodeal spiracle, petiole, postpetiole and gaster conspecific with the workers. Mandibles with nine teeth; apical tooth bigger than all others, followed by a smaller second apical tooth, six equally developed triangular teeth and a small basal denticule. Compound eyes with 16 ommatidia at maximum width and 21 ommatidia at maximum length. Posterior fourth of head with three equally developed ocelli. Most apical funicular segment slightly shorter than the two anterior together.

Mesosoma. In lateral view anterior margin of pronotum and anterior face of scutum almost vertical, dorsal face of scutum flat almost concealing the pronotum in dorsal view, anterior margin of scutum rounded. In dorsal view, posterior margin almost straight, slightly rounded. Parapsidial lines visible due to the darker color of the parapsidial region and median portion of scutum. Notaulices obsolete. Prescutum narrow, at middle portion anterior and posterior margin not touching, axillae subtriangular. Scutum-scutellar sulcus impressed, convex and rounded. Scutellum trapezoid, anterior margin double the width of the slightly convex posterior margin. Metanotum reduced, appearing only as small, flattened disc in dorsal view. Katepisternum subquadrate to subtriangular; anepisternum two thirds of size of katepisternum, subquadrate, both divided by a distinct groove and ending posteriorly in a carina. Propodeum basal face straight in lateral view, oblique, with a sharp and produced triangular spine. Petiole, postpetiole and gaster as in the workers. Spiracle of first gastral segment indistinct.