Strumigenys orchibia

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Strumigenys orchibia
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Attini
Genus: Strumigenys
Species: S. orchibia
Binomial name
Strumigenys orchibia
(Brown, 1953)

Strumigenys orchibia casent0900223 p 1 high.jpg

Strumigenys orchibia casent0900223 d 1 high.jpg

Specimen Labels

Occurs in cloud forest. The types was collected from an orchid.

Identification

Bolton (2000) - A member of the Strumigenys schulzi-group. Closely related to Strumigenys schulzi but orchibia is a larger species with much denser and more extensive basigastral costulae and fewer standing hairs on the mesonotum. It is also close to Strumigenys metrix but this species is darker in colour (dark brown with blackish brown gaster) and has the mesopleuron smooth and shining. Also, in metrix the transverse row of standing hairs behind the highest point of the vertex contains 6 hairs that are relatively very short, only slightly longer and more erect than the ground-pilosity. In orchibia the transverse row contains 4 hairs that are very obviously erect and much longer and more conspicuous than the small appressed hairs of the ground-pilosity.

Keys including this Species

Distribution

Distribution based on Regional Taxon Lists

Neotropical Region: Colombia, Venezuela (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 New General Catalogue, a catalogue of the world's ants.

  • orchibia. Smithistruma (Smithistruma) orchibia Brown, 1953g: 105, pl. 2, fig. 24 (w.m.) VENEZUELA. Combination in Pyramica: Bolton, 1999: 1673; in Strumigenys: Baroni Urbani & De Andrade, 2007: 125. See also: Bolton, 2000: 224.

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

Description

Worker

Bolton (2000) - TL 2.2-2.4, HL 0.60-0.64, HW 0.44-0.47, ML 0.09-0.10, MI 15-17, SL 0.26-0.28, SI 59-61, PW 0.30-0.34, AL 0.60-0.68 (4 measured). Anterior clypeal margin transverse to very feebly concave. Dorsum of head with ground-pilosity of small spatulate hairs that are closely applied to the surface, but behind highest point of vertex there is a transverse row of 4 much longer erect simple hairs that are straight or only very weakly curved. Apicoscrobal hair curved anteriorly, feebly clavate. Scape strongly dorsoventrally flattened, short and broad, its broadest point proximal of its midlength. Eye large, with 5-6 ommatidia in the longest row. Pronotal humeral hair straight, flattened apically; a single pair of erect hairs present on mesonotum. All dorsal and lateral surfaces of alitrunk reticulate-punctate, as are the dorsal surfaces of the petiole and postpetiole. Petiole in profile with dorsal length of node greater than the height of the anterior face of the node; petiole without a ventral spongiform strip. Dorsum of first gastral tergite with numerous short erect stout hairs that are simple or very slightly expanded apically. Basigastral costulae very numerous, fine and extremely closely packed across the entire basal width of the segment to give a uniformly striolate appearence, the costulae extend over the basal half of the sclerite.

Type Material

Bolton (2000) - Holotype worker, paratype workers and males, VENEZUELA: in U.S. Plant Quarantine at San Francisco from an orchid plant, Cattleya mossiae, shipped from Caracas, Venezuela, the exact locality of collection unknown. Label dated 7.iii.1946, with quarantine no. SF 20295 46-2402. (Museum of Comparative Zoology, Museu de Zoologia da Universidade de Sao Paulo, Naturhistorisches Museum Wien, Vienna) [examined].

References

  • Baroni Urbani, C. & De Andrade, M.L. 2007. The ant tribe Dacetini: limits and constituent genera, with descriptions of new species. Annali del Museo Civico di Storia Naturale “G. Doria”. 99: 1-191.
  • Bolton, B. 1999. Ant genera of the tribe Dacetonini (Hymenoptera: Formicidae). J. Nat. Hist. 3 33: 1639-1689 (page 1673, Combination in Pyramica)
  • Bolton, B. 2000. The ant tribe Dacetini. Memoirs of the American Entomological Institute. 65:1-1028. (page 224, fig. 152 redescription of worker)
  • Brown, W. L., Jr. 1953f. The neotropical species of the ant genus Strumigenys Fr. Smith: group of smithii Forel. J. N. Y. Entomol. Soc. 61: 101-110 (page 105, pl. 2, fig. 24 worker, male described)
  • Brown, W. L., Jr. 1953g. Revisionary studies in the ant tribe Dacetini. Am. Midl. Nat. 50: 1-137 PDF
  • Kempf, W. W. 1972b. Catálogo abreviado das formigas da regia~o Neotropical. Stud. Entomol. 15: 3-344 (page 231, catalogue)