Solenopsis desecheoensis

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Solenopsis desecheoensis
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Solenopsidini
Genus: Solenopsis
Species complex: globularia
Species: S. desecheoensis
Binomial name
Solenopsis desecheoensis
Mann, 1920

Known only from the type series, nothing is known about the biology of Solenopsis desecheoensis.

Identification

A New World thief ant that is a member of the globularia species complex

Pacheco and Mackay (2013) – Worker - The worker is easily recognized as a member of the globularia species complex, based on its greatly dilated postpetiole. It can be identified based on its dark brown coloration (appears to have faded in time for Mann 1920 states they are jet black) with yellowish-brown appendages. Based on the material examined, it appears to be monomorphic with the medial clypeal tooth is well developed and the mesopleuron and metapleuron are horizontally striated.

Solenopsis desecheoensis is different from the widely distributed Solenopsis globularia in that it is a dark piceous brown with yellow-brown appendages, has a more developed medial clypeal tooth and an eye of 22-25 ommatidia. Based on the material examined (only three workers), it appears to be monomorphic, opposed to the polymorphic members of the rest of the globularia species group. We will be conservative and recognize S. desecheoensis as a valid species. However, further collection in Puerto Rico or the adjacent Antilles Islands, may show this species to be a color variant and synonym of S. globularia.

Keys

Keys including this Species

Distribution

Desecheo Island, Puerto Rico.


Latitudinal Distribution Pattern

Latitudinal Range: 18.387° to 18.387°.

 
North
Temperate
North
Subtropical
Tropical South
Subtropical
South
Temperate

Distribution based on Regional Taxon Lists

Neotropical Region: Netherlands Antilles, Puerto Rico (type locality).

Distribution based on AntMaps

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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.

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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.

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Biology

Castes

Known only from the worker caste.

Nomenclature

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

  • desecheoensis. Solenopsis globularia var. desecheoensis Mann, 1920: 428 (w.) PUERTO RICO (Desecheo I.).
    • Type-material: lectotype worker (by designation of Pacheco & Mackay, 2013: 149), 2 paralectotype workers.
    • [Note: original description cites only, “two workers, collected by Frank E. Lutz”.]
    • Type-locality: lectotype Puerto Rico: Desecheo I., 18-20.ii.1914 (F.E. Lutz); paralectotypes with same data.
    • Type-depository: MCZC.
    • [Misspelled as descheoensis by Creighton, 1930b: 116.]
    • As unavailable (infrasubspecific) name: Creighton, 1930b: 116; Kempf, 1972a: 236.
    • Subspecies of globularia: Smith, M.R. 1937: 840; Ettershank, 1966: 140; Bolton, 1995b: 387.
    • Status as species: Pacheco & Mackay, 2013: 148 (redescription).
    • Distribution: Puerto Rico (Desecheo I.).

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

Description

Worker

Pacheco and Mackay (2013) - Measurements (n=3). TL 2.10-2.16 (2.14); HL 0.582-0.600 (0.594); HW 0.480; EL 0.090-0.096 (0.094); ED 0.066-0.072 (0.070); SL 0.408-0.420 (0.416); FSL 0.180; CI 80.0-82.5 (80.8); SI 70.0; PL 0.120; PW 0.198-0.210 (0.204); PI 57.1-60.6 (58.9); PPL 0.240; PPW 0.288-0.318 (0.302); PPI 75.5-83.3 (79.6); WL 0.420; PSL 0.036; PSW 0.030.

Moderately large; concolorous dark brown Get black in original description Mann 1920), yellowish-brown appendages; head subquadrate, side convex, posterior border straight, finely punctate; five clypeal teeth present, angulate, including medial tooth; clypeal carinae well defined; eyes large, 22-25 ommatidia; scape long, reaching ¾ length to posterior lateral comer of head; minor funicular segments 3-8 long (0.180 mm in total length); pronotum smooth and shiny; metapleuron horizontally striated; notopropodeal suture well depressed, notch-like, groove breaks sculpture of mesosoma; posterior edge of propodeum angulate; propodeal spiracle small, circular; metapleuron horizontally striated; petiolar peduncle long (0.072 mm); anterior and posterior face of petiole nearly straight, petiolar peduncle lacking tooth or flange ventrally; postpetiole greatly dilated, globose, larger than petiole viewed laterally and dorsally, lacking tooth or flange ventrally.

Abundantly hairy, pilosity yellow; head with erect hairs of various lengths (0.030-0.120 mm); numerous hairs of various lengths on dorsum of mesosoma (0.030-0.120 mm) pointed in different directions; hairs on petiole, postpetiole and gaster curve posteriorly.

Type Material

Pacheco and Mackay (2013) - Antilles Is., Desecheo Is., W. I. Feb. 18-20 '14, M.C.Z. Cotype 1-3 20928, Wm. M. Wheeler, F3505D (lectotype worker [here designated] and 2 paralectotype workers Museum of Comparative Zoology).

References

References based on Global Ant Biodiversity Informatics

  • Boer P. 2019. Ants of Saba, species list. Accessed on January 22 2019 at http://www.nlmieren.nl/websitepages/SPECIES%20LIST%20SABA.html
  • Creighton W. S. 1930. The New World species of the genus Solenopsis (Hymenop. Formicidae). Proceedings of the American Academy of Arts and Sciences 66: 39-151.
  • Ettershank G. 1966. A generic revision of the world Myrmicinae related to Solenopsis and Pheidologeton (Hymenoptera: Formicidae). Aust. J. Zool. 14: 73-171.
  • Kempf, W.W. 1972. Catalago abreviado das formigas da regiao Neotropical (Hym. Formicidae) Studia Entomologica 15(1-4).
  • Mann W. M. 1920. Additions to the ant fauna of the West Indies and Central America. Bulletin of the American Museum of Natural History 42: 403-439.
  • Pacheco J. A., and W. P. Mackay. 2013. The systematics and biology of the New World thief ants of the genus Solenopsis (Hymenoptera: Formicidae). Lewiston, New York: Edwin Mellen Press, 501 pp.
  • Smith M. R. 1937. The ants of Puerto Rico. Journal of Agriculture of the University of Puerto Rico 20: 819-875.