Myrmelachista amicta

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Myrmelachista amicta
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Formicinae
Tribe: Myrmelachistini
Genus: Myrmelachista
Species: M. amicta
Binomial name
Myrmelachista amicta
Wheeler, W.M., 1934

Myrmelachista amicta jtlc000005275 p 1 high.jpg

Myrmelachista amicta jtlc000005275 d 1 high.jpg

Specimen Labels

The types were taken by Skwarra "in Tillandsia balbisiana" and from the "hollow stem of composite".

Identification

Worker with nine antennal segments. See Longino's comments regarding Myrmelachista of southern Mexico.

Distribution

Distribution based on Regional Taxon Lists

Neotropical Region: Mexico (type locality).

Distribution based on AntMaps

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Distribution based on AntWeb specimens

Check data from AntWeb

Biology

Castes

Nomenclature

The following information is derived from Barry Bolton's New General Catalogue, a catalogue of the world's ants.

  • amicta. Myrmelachista amicta Wheeler, W.M. 1934g: 195 (w.) MEXICO.

Unless otherwise noted the text for the remainder of this section is reported from the publication that includes the original description.

Description

Worker

Length 1.5-1.75 mm.

Head moderately large, subrectangular, as broad as long, with straight posterior border and nearly straight sides. Eyes fiat, near the middle of the sides. Mandibles broad, very convex, 5-toothed, the median tooth very small. Clypeus convex, its anterior border with a minute median denticle. Antennae 9-jointed; rather short; scapes extending slightly beyond the posterior orbits; first joint rather narrow, fully twice as long as broad; joints 2-5 small; second joint nearly as long as broad; 3-5 much shorter; two basal joints of the large club distinctly longer than broad, together shorter than the swollen terminal joint. Thorax short but narrower than in skwarrae, with more pronounced mesoepinotal constriction; promesonotum convex, subhemispherical, considerably larger than the epinotum; mesonotum subelliptical, less than one and one-half times as broad as long; epinotum lower than the promesonotum, not longer than broad, subcuboidal, with subequal base and declivity, meeting at a distinct angle, the declivity less sloping than in skwarrae. Petiole short, its scale only slightly inclined forward, decidedly thinner than in skwarrae, subrectangular from behind, with sharp, distinctly emarginate superior border. Gaster ovoidal, its first segment rounded anteriorly, its tip rather long and pointed. Legs rather slender, fore femora somewhat enlarged.

Smooth and shining, with fine, very sparse, piligerous punctures on the body; mandibles and clypeus superficially reticulate-punctate. Hairs glistening white, much sparser and shorter than in skwarrae, numerous but appressed on the scapes and legs, more suberect on the funiculi.

Deep castaneous; mandibles, anterior portion of head and upper surface of pronotum red or yellowish red; femora dark brown except at their bases and tips, which, like the tibiae, tarsi and antennae are yellow; last joint of antennal clubs feebly infuscated.

Type Material

Described from 16 workers (618) taken by Dr. Skwarra at Mirador, Vera Cruz in Tillandsia balbisiana and three (296) from the hollow stem of a composite.

Longino (2006) - Syntypes Museum of Comparative Zoology, National Museum of Natural History (USNM syntype worker examined).

References