Myrmelachista haberi

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Myrmelachista haberi
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Formicinae
Tribe: Myrmelachistini
Genus: Myrmelachista
Species: M. haberi
Binomial name
Myrmelachista haberi
Longino, 2006

Myrmelachista haberi casent0627908 p 1 high.jpg

The biology of this species is similar to Myrmelachista flavocotea. In the forest patches near Santa Elena, colonies have been found in Ocotea nicaraguensis, an understory treelet. The one colony dissected in its entirety was monogynous, and founding queens were found alone in separate chambers in shoot tips from stump sprouts. On the Barva transect, a colony was found in O. dendrodaphne and an alate queen was captured in a Project ALAS Malaise trap. (Longino 2006)


Longino (2006) - Worker with antenna 9-segmented, maxillary palpus 5-segmented, color yellow. Queen with black head, HW 0.85–0.98. Male with maxillary palpus 5-segmented; pygostyles absent; cuspis very small, thin, sharply pointed; digitus with more or less constant width, gently curved ventrally to a blunt apex. Obligate inhabitant of understory Lauraceae.

Keys including this Species


Latitudinal Distribution Pattern

Latitudinal Range: 10.33333333° to 10.26666667°.

Tropical South

Distribution based on Regional Taxon Lists

Neotropical Region: Costa Rica (type locality).

Distribution based on AntMaps


Distribution based on AntWeb specimens

Check data from AntWeb

Countries Occupied

Number of countries occupied by this species based on AntWiki Regional Taxon Lists. In general, fewer countries occupied indicates a narrower range, while more countries indicates a more widespread species.

Estimated Abundance

Relative abundance based on number of AntMaps records per species (this species within the purple bar). Fewer records (to the left) indicates a less abundant/encountered species while more records (to the right) indicates more abundant/encountered species.


This species is known from two general areas in Costa Rica: (1) Cordillera de Tilarán, 1000–1500m elevation, in patches of moist forest on the Pacific slope near Santa Elena de Monteverde; and (2) Cordillera Volcánica Central, 1100m elevation, in mature wet forest on the Barva transect in Braulio Carrillo National Park.




Images from AntWeb

Myrmelachista haberi inbiocri002281806 h 1 high.jpgMyrmelachista haberi inbiocri002281806 p 1 high.jpgMyrmelachista haberi inbiocri002281806 l 1 high.jpg
Holotype haberiQueen (alate/dealate). Specimen code inbiocri002281806. Photographer J. Longino, uploaded by University of Utah. Owned by INBC.


Images from AntWeb

Myrmelachista haberi inbiocri002281804 h 1 high.jpg
Male (alate). Specimen code inbiocri002281804. Photographer J. Longino, uploaded by University of Utah. Owned by JTLC.


The following information is derived from Barry Bolton's Online Catalogue of the Ants of the World.

  • haberi. Myrmelachista haberi Longino, 2006a: 23, figs. 1, 4, 7, 8, 9 (w.q.m.) COSTA RICA.

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



HL 0.566–0.657, HW 0.517–0.649, SL 0.278–0.321, EL 0.107–0.128, CI 89–99 (n=4).

Same as Myrmelachista flavocotea except for color of the gaster, which may be entirely brown or with posterior bands of infuscation on the tergites.


HL 0.996–1.115, HW 0.853–0.984, SL 0.430–0.488, EL 0.259–0.297, OW 0.076–0.087, OD 0.166–0.213, CI 83–89, OI 28–32, OcI 7–8 (n=7).

Antenna 9-segmented; maxillary palpus 5-segmented; labrum short, bilobed, not covering mouthparts; dorsal surface of mandible with large piligerous puncta, interspaces either smooth and shining or coarsely rugose; clypeus with large piligerous puncta; malar spaces with variable extent of weak punctatorugose sculpturing, grading to smooth and shining posteriorly; in full face view, with abundant short subdecumbent setae projecting from rear margin and sides of head; ventral surface of head with abundant short erect setae; scapes with abundant erect to suberect setae, longer setae subequal to width of scape; outer surface of hind tibia with abundant erect to subdecumbent setae, longer setae shorter than width of tibia; color solid black.


Antenna 10-segmented; maxillary palpus 5-segmented; pygostyles absent; basiparamere lobe thin, sharp, and spine-like, about half the length of the paramere; paramere long, thin, parallel-sided; cuspis very small, thin, sharply pointed; digitus with more or less constant width, gently curved ventrally to a blunt apex, dorsal margin smooth, with no denticles; apodeme of penial valve curving into dorsal margin at obtuse angle.

Type Material

Holotype queen: Costa Rica, Prov. Guanacaste, 3km N Santa Elena, 10°20’N, 84°50’W, 1500m, 26 Jun 1991 (J. Longino#2946-s) [[[INBC|Instituto Nacional de Biodiversidad]], specimen code INBIOCRI002281806].

Paratypes: all same locality as holotype; INBIOCRI002281803 (queen and workers), 26 Jun 1991 (J. Longino#2944) Los Angeles County Museum of Natural History; JTLC000006200, JTLC000006201, INBIOCRI002281805 (queens), 26 Jun 1991 (J. Longino#2946-s) University of California, Davis, Museum of Comparative Zoology, National Museum of Natural History; INBIOCRI001282897, 2 Mar 1996 (J. Longino#3800) The Natural History Museum.


The name refers to the Monteverde botanist and entomologist Bill Haber, who has helped with plant identifications for me and generations of tropical biology students.


References based on Global Ant Biodiversity Informatics

  • Longino J. T. 2006. A taxonomic review of the genus Myrmelachista (hymenoptera: Formicidae) in Costa Rica. Zootaxa 1141: 1-54