Leptogenys consanguinea

A collection was made in evergreen forest.

Identification
Lattke (2011) - Eye weakly convex, almost flat, diameter less than one-fourth lateral cephalic margin; one mandible shuts tightly against clypeus, with other mandible leaving narrow gap in cephalic full-face view; mandible mostly parallel-sided, gradually expanding apicad, basal angle curved, dorsum smooth and shining with sparse punctate; basal margin with two setae at mid-length.

This species can be confused with Leptogenys yocota, and a number of characters that permit separation are mentioned in the discussion for L. yocota.

Distribution
This taxon was described from Mexico. It is known from southern Mexico – Guatemala.

Nomenclature

 *  consanguinea. Leptogenys (Lobopelta) consanguinea Wheeler, W.M. 1909b: 229 (w.m.) MEXICO. Wheeler, G.C. & Wheeler, J. 1964b: 455 (l.). See also: Lattke, 2011: 201.

Worker
Lattke (2011) - Metrics (n = 6): HL 1.06 – 1.16; HW 0.71 – 0.81; ML 0.53 – 0.63; EL 0.20 0.15 – 0.20; SL 0.99 – 1.14; PW 0.61 – 0.68; WL 1.62 – 1.92; PH 0.61 – 0.66; PL 0.53 – 0.61; DPW 0.38 – 0.43 mm. CI 0.66 – 0.70; MI 0.72 – 0.79; OI 0.19 – 0.26; SI 1.34 – 1.45; LPI 1.08 – 1.14; DPI 0.65 – 0.74.

Head subrectangular in full-face view, wider anterad than posterad; posterior margin mostly straight, lateral cephalic margin mostly very broadly convex. Anterior clypeal margin converges to triangular median lobe, median lobe broadly triangular with lamellate lateral margins, apex pointed; lateral lobe narrow, convex. Eye weakly convex, almost flat, diameter less than one-fourth lateral cephalic margin, ocular-malar margin more than one eye diameter long, ocular midpoint closer to lateral cephalic midpoint than to mandibular insertion. Scape surpasses posterior cephalic border by one-third its length, antennal segments II and III subequal in length, segment II almost 2 × longer than wide, flagellum mostly subcylindrical; cephalic dorsum mostly smooth and shining, clypeus with weak longitudinal striae medially, and sparse piligerous tubercles. One mandible shuts tightly against clypeus, with other mandible leaving narrow gap in cephalic full-face view; mandible mostly parallel-sided, gradually expanding apicad, basal angle curved, dorsum smooth and shining with sparse punctate; basal margin with 2 – 3 hairs at mid-length. Anterior surface of labrum with sparse piligerous tubercles.

Mesosoma with anterior pronotal margin convex in lateral view, posteriorly broadly convex; mesonotal margin slightly impressed below pronotal margin, posteriorly curving into broad metanotal groove; propodeal dorsal margin broadly convex, length of dorsal margin more than 2 × declivitous margin, declivity with truncate lobe. Mesometanotal suture well impressed; mesosoma mostly smooth and shining, oblique striae present on ventral meso- and metapleura. Propodeal spiracle faces posterolaterally, with broad sulcus extending from spiracle to bulla; declivity with weak transverse striae. Mesonotum wider than long in dorsal view, anterior margin convex, posterior margin broadly convex, almost straight.

Petiole with brief vertical anterior margin in lateral view, dorsal margin broadly convex, posterior margin slightly sinuate, almost straight, node smooth and shining. Node longer than wide in dorsal view, trapezoid shaped with anterior margin more than half the width of posterior margin; posterior margin straight, anterior margin convex, coxae smooth and shining. Constriction between abdominal segments III and IV well marked. Mesometathorax and propodeum black; head, prothorax, petiole, and first two gastral segments irregular dark brown; clypeus, mandible, antenna, and legs ferruginous brown; gastral apex orange. Body mostly without appressed pilosity; anterior cephalic dorsum with sparse short, decumbent hairs; preapical protarsal segment with 2 pairs of setae as in preceding segments.

Queen
Lattke (2011) - Metrics: HL 1.09; HW 0.73; ML 0.53; EL 0.15; SL 1.01; PW 0.61; WL 1.59; PH 0.48; PL 0.48; DPW 0.38 mm. CI 0.67; MI 0.72; OI 0.21; SI 1.38; LPI 1.00; DPI 0.79. Closely resembles the worker except for usual differences.

Male
Lattke (2011) - Described by Wheeler (1909). Not examined.

Type Material
Lattke (2011) - Syntype workers: Mexico, Córdoba, Cat. No. 3–4, 20503 (F. Silvestri) [examined]. The MCZC syntypes consist of one pin with 2 workers and another pin with a worker and a male. The male is rather battered lacking parts of the antennae, wings, most legs, besides abdominal segments IV and posterad.

Additional References

 * [[Media: Lattke 2011.pdf|Lattke, J.E. 2011. Revision of the New World species of the genus Leptogenys Roger (Insecta: Hymenoptera: Formicidae: Ponerinae). Arthropod Systematics & Phylogeny, 69, 127-264. PDF]]