Pheidole lourothi

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Pheidole lourothi
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Attini
Genus: Pheidole
Species: P. lourothi
Binomial name
Pheidole lourothi
Wilson, 2003

The type colony was collected by Philip S. Ward from a rotten log on the floor of rainforest. (Wilson 2003)


See the description in the nomenclature section.

Keys including this Species


Only known from the type locality.

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




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

  • lourothi. Pheidole lourothi Wilson, 2003: 317, figs. (s.w.) COSTA RICA.

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


A very large blackish (major) or reddish (minor) brown member of the fallax group, distinguished in the major by its long propodeal spines, largely rugoreticulate dorsal head surface, and almost completely rugulose and carinulate sides of the mesosoma; and in the minor by the rugulose mesopleuron and propodeum.

Similar to Pheidole ajax, Pheidole fiorii, Pheidole hector, Pheidole hirsuta and Pheidole jaculifera, differing in many details of body form, sculpturing, and pilosity, as illustrated.

MEASUREMENTS (mm) Holotype major: HW 1.88, HL 1.80, SL 1.04, EL 0.30, PW 0.84. Paratype minor: HW 0.78, HL 0.92, SL 1.16, EL 0.22, PW 0.60.

COLOR Major: body blackish brown, head also with a faint reddish tinge; mandibles dark reddish brown; scape and legs except tarsi medium brown; funiculus and tarsi brownish yellow.

Minor: gaster dark brown, rest of body medium reddish brown; appendages light reddish brown.

Pheidole lourothi Wilson 2003.jpg

Figure. Upper: holotype, major. Lower: paratype, minor. Scale bars = 1 mm.

Type Material

COSTA RICA: 4 km south-southeast of San Vito, Puntarenas, col. Philip S. Ward. Museum of Comparative Zoology


Named in honor of Louis M. Roth, distinguished insect systematist and friend, who accompanied me on my first field trip to Costa Rica in 1959.