Lenomyrmex costatus

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Lenomyrmex costatus
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Attini
Genus: Lenomyrmex
Species: L. costatus
Binomial name
Lenomyrmex costatus
Fernández & Palacio, 1999

Lenomyrmex costatus F2B.jpg

Lenomyrmex costatus F2C.jpg

Only know from the type. The label states it was collected along a road (Fortuna to Chiriqui) but there is no habitat specified.


Keys including this Species


Latitudinal Distribution Pattern

Latitudinal Range: 8.95° to 8.783333333°.

Tropical South

Distribution based on Regional Taxon Lists

Neotropical Region: Panama (type locality).

Distribution based on AntMaps


Distribution based on AntWeb specimens

Check data from AntWeb




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

  • costatus. Lenomyrmex costatus Fernández & Palacio, 1999: 11, fig. 7 (w.) PANAMA.

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



TL: 3.88; HL: 0.76; HW: 0.64; ML: 0.30; SL: 0.55; EL: 0.20; WL: 1.12; PL: 0.44; PW: 0.21; PPL: 0.25; PPW: 0.22; GL: 1.00; GW: 0.66; CI: 0.84; OI: 0.31. Worker diagnosis. Similar to Lenomyrmex mandibularis, with the following differences. Propodeal spines longer, length at least 1-3 greater than distance between bases. Petiolar node poorly defined, dorsal surface of peduncle forms a continuous and slightly convex surface with the node; posterior face of petiolar node shorter, steeper. Subpetiolar process widely rounded in anteroventral view. Head, mesosoma, petiole and postpetiole with well impressed costae; costae of head and propodeal dorsum longitudinal; those of pronotum and mesonotum transverse, continued in an obtuse angle on the mesonotum with oblique mesopleural costae; petiole and postpetiolar costae longitudinal. Head with numerous suberect hairs, longer than in Lenomyrmex mandibularis. Scape with several erect to suberect hairs, as long as or longer than maximum scape diameter. Femora and tibiae with some erect and suberect scattered hairs; decumbent pile less abundant than in Lenomyrmex mandibularis. Body ferruginous yellow; antennae and legs slightly lighter; mandible and antennal club whitish yellow

Type Material

Rabeling et al. (2016) - Holotype. Panama; Bocas del Toro; Fortuna to Chiriqui Grande rd.; elevation 1050 meters above sea level; GPS coordinates: 8°47'N, 82°12'W; 14.vii.1987; leg. D. M. Olson (DMO523); MCZ-ENT00036069. Museum of Comparative Zoology.


From the Latin costa (rib), in reference to the rib-like sculpture that covers the head, mesosoma and waist segments.


References based on Global Ant Biodiversity Informatics

  • Fernández F. and Palacio, E. E. 1999. Lenomyrmex, an enigmatic new ant genus from the Neotropical region (Hymenoptera: Formicidae: Myrmicinae). Systematic Entomology 24: 7-16
  • Fernández, F. and S. Sendoya. 2004. Lista de las hormigas neotropicales. Biota Colombiana Volume 5, Number 1.