Kalathomyrmex emeryi

Distribution based on Regional Taxon Lists
Neotropical Region: Argentina, Bolivia, Brazil, Colombia, Paraguay, Uruguay, Venezuela.

Nomenclature

 *  emeryi. Myrmicocrypta emeryi Forel, 1907f: 144 (w.) COLOMBIA. Forel, 1912e: 189 (q.m.). Combination in Cyphomyrmex (Mycetophylax): Emery, 1913b: 251; in Myrmicocrypta (Mycetophylax): Santschi, 1916e: 383; in Mycetophylax: Santschi, 1925e: 163. Senior synonym of hummelincki: Weber, 1958d: 263; of arenicola, argentina, bolivari, fortis, gallardoi, glaber, hubrichi, weiseri: Klingenberg & Brandão, 2009: 22.
 * arenicola. Myrmicocrypta emeryi var. arenicola Forel, 1912e: 189 (w.q.) ARGENTINA. Combination in Cyphomyrmex (Mycetophylax): Emery, 1924d: 343; in Myrmicocrypta (Mycetophylax): Santschi, 1922b: 355; in Mycetophylax: Kempf, 1972a: 146. Junior synonym of emeryi: Klingenberg & Brandão, 2009: 22.
 * fortis. Myrmicocrypta emeryi var. fortis Forel, 1912e: 189 (w.) ARGENTINA. Combination in M. (Mycetophylax): Santschi, 1922b: 355; in Cyphomyrmex (Mycetophylax): Emery, 1924d: 343; in Mycetophylax: Kempf, 1972a: 146. Junior synonym of emeryi: Klingenberg & Brandão, 2009: 22.
 * argentina. Myrmicocrypta (Mycetophylax) emeryi var. argentina Santschi, 1916e: 383 (w.) ARGENTINA. Combination in Cyphomyrmex (Mycetophylax): Emery, 1924d: 343; in Mycetophylax: Kempf, 1972a: 146. Junior synonym of emeryi: Klingenberg & Brandão, 2009: 22.
 * gallardoi. Myrmicocrypta (Mycetophylax) emeryi st. gallardoi Santschi, 1922b: 354 (w.) ARGENTINA. Combination in Mycetophylax: Kempf, 1972a: 146. Junior synonym of emeryi: Klingenberg & Brandão, 2009: 22.
 * hubrichi. Mycetophylax emeryi st. hubrichi Santschi, 1925e: 163, fig. 6 (w.) ARGENTINA. Junior synonym of emeryi: Klingenberg & Brandão, 2009: 23.
 * weiseri. Mycetophylax emeryi st. weiseri Santschi, 1929d: 303 (w.) BRAZIL. Junior synonym of emeryi: Klingenberg & Brandão, 2009: 23.
 * bolivari. Mycetophylax bolivari Weber, 1948b: 84 (w.) VENEZUELA. Subspecies of emeryi: Weber, 1958d: 263. Junior synonym of emeryi: Klingenberg & Brandão, 2009: 22.
 * glaber. Mycetophylax glaber Weber, 1948b: 85 (w.) BOLIVIA. Junior synonym of emeryi: Klingenberg & Brandão, 2009: 23.
 * hummelincki. Mycetophylax hummelincki Weber, 1948b: 84 (w.) VENEZUELA. Junior synonym of emeryi: Weber, 1958d: 263.

Description
Klingenberg & Brandão, 2009:

Worker
Range of measurements (in mm) and indices of examined specimens (N = 76): IOD 0.49-0.83; HL 0.54-0.83; CI 85-106; SL 0.48-0.8; SI 84-112; ML 0.23-0.48; MI 34-77; WL 0.70-1.26; PrW 0.26-0.60; PL 0.16-0.30; PPL 0.19-0.35; GL 0.57-0.92; FL 0.52-0.98; TL 2.42-4.03.

Color in general yellowish to reddish-brown, some specimens may be darker. Apex of funiculus, clypeus, and masticatory border of mandibles, head vertex, postpetiole, gaster and femora brownish. Mandibles and tarsi yellowish; rest of the body light reddish brown. Under optical scope, body sculpture densely punctuated with exception of lateral parts of pronotum, where the sculpture is more superficial. Mandible disc shiny with piliferous punctuations. Mesosoma covered by a fine layer of “dirt”, visible only in SEM images in a way that the sculpture of the integument is “reprinted” in the dirt-layer. Whole body covered by shiny whitish to golden appressed hairs. Long, flexuous hairs covering the mandibles and gular face.

Head shape quadrate (see CI). Mandibles with five teeth, apical tooth larger, followed by smaller second and third teeth. After the diastema a small fourth tooth followed by a small denticule. Anterior margin of clypeus gently concave. In lateral view, clypeus triangular. In frontal view latero-posterior margin of clypeus strongly produced forwards over the lateral wings of the clypeus, as rounded trenchant ridges, resulting in two large flat circular areas where the antennal scapes articulate. Median portion of clypeus attains posteriorly the posterior level of the antennal insertions in a generally straight sometimes rounded suture, followed by a small impressed triangular frontal area. A shallowly impressed median line running from the frontal area to the vertex. Frontal lobes reduced, barely covering the antennal insertions, their maximum expansion less than a fourth of a longitudinal median head axis and the lateral margins of head, ending posteriorly at the level of the posterior margin of compound eyes. Lateral carinae bordering the internal margins of the compound eyes, fading out a little after their posterior margins. Compound eyes set slightly before the middle of the head, at maximum width with ten ommatidia and at maximum length with 14 ommatidia. Vertexal margin straight, but occasionally with a median impression. Antennae with flattened scapes, surpassing the posterolateral corners of the head when laid back over the head capsule. First funicular segment as long as the second and the third together. Apical end of funiculus with a three segmented club, only a little wider than the other funicular segments. Ventral face of head flat.

Mesosoma. Pronotum without tubercles or distinct protuberances, lateral pronotal margins rounded, without spines or angles. Occasionally the pronotum bearing a blunt obliquely directed spine (specimens from Paraguay and Argentina). Dorsal face of mesonotum evenly rounded, in side view, followed by a small depression and a conical low protuberance. Anepisternum clearly divided from the mesonotum by a carina. In lateral view, basal face of propodeum slightly convex anteriorly, meeting the concave declivous face and about one half shorter than basal face. Propodeal spiracle opening in an angle of 45° in relation to the main body axis. Propodeum with a pair of divergent, short, blunt obtuse angles, directed obliquely upwards. In dorsal view, petiole straight, wider at three fourths of its length, with a vestigially developed ventral process. Postpetiole, in dorsal view, subtriangular, with a large impression at posterior margin, forming two distinct lobes, heart-shaped and dorsoventrally flattened.

Gaster smooth, without protuberances or carinae.