Eciton mexicanum panamense

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Eciton mexicanum panamense
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Dorylinae
Genus: Eciton
Species: E. mexicanum
Subspecies: E. mexicanum panamense
Trinomial name
Eciton mexicanum panamense
Borgmeier, 1955

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E.m.PanamaQDG1.jpg

Identification

Distribution

Distribution based on Regional Taxon Lists

Neotropical Region: Panama (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 Online Catalogue of the Ants of the World.

  • panamense. Eciton mexicanum subsp. panamense Borgmeier, 1955: 257, pl. 55, figs. 5, 9 (s.w.) PANAMA (Barro Colorado I.).
    • Type-material: holotype queen, paratype workers (number not stated).
    • Type-locality: holotype Panama: Canal Zone, Barro Colorado Island, 29.iii.1946 (Scheirla); paratypes: workers with same data, workers Panama: Pequeni River (Schneirla), workers Panama: Canal Zone, Ancon, Coconut Palms (Zetek).
    • Type-depository: MZSP.
    • Subspecies of mexicanum: Kempf, 1972a: 103; Bolton, 1995b: 185.
    • Distribution: Panama.

Taxonomic Notes

Jack Longino:

Borgmeier (1955) described a subspecies Eciton mexicanum panamense from central Panama, based on workers and queen. He differentiated panamense from mexicanum s. str. as follows (my translation): "The soldier differs from mexicanum s. str. by the shorter scapes (1.84mm), shorter funiculus, shorter mandible (3mm) and smaller postpetiole (0.56mm broad posteriorly), and by a well developed anteroventral petiolar tooth (also present on the available minor workers, while it is missing or very short on the workers of mexicanum s. str.)." His key to the queens differentiated the forms as follows:

Petiolar horns with approximately parallel sides, dorsal longitudinal sulcus broad and deep: mexicanum s. str.

Petiolar horns tapered posteriorly, dorsal longitudinal sulcus narrow and shallow: panamense.

Borgmeier 1955, Fig 8-9.jpg

The degree of development of the anteroventral petiolar tooth is highly variable among the Costa Rica material I have examined, from nearly absent to well developed. I consider panamense a junior synonym of mexicanum until evidence to the contrary.

Description

References