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Strumigenys calamita
| Strumigenys calamita | |
|---|---|
| |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Insecta |
| Order: | Hymenoptera |
| Family: | Formicidae |
| Subfamily: | Myrmicinae |
| Tribe: | Attini |
| Genus: | Strumigenys |
| Species: | S. calamita |
| Binomial name | |
| Strumigenys calamita Bolton, 2000
| |
This species occurs in lowland wet forest, in leaf litter on the forest floor (Longino, Ants of Costa Rica).
Identification
Bolton (2000) - A member of the Strumigenys silvestrii-group. S. calamita is closest related to Strumigenys perdita but the two have very different gastral pilosity. In the latter all waist segment and gastral standing hairs are simple, erect and stiff, their shafts uniform and straight or at most only extremely shallowly curved. None is distinctly remiform or claviform but most are bluntly pointed apically. In calamita, on the other hand, these hairs are shorter and stouter, distinctly curved, and very obviously remiform or claviform.
This species and perdita show similarities with the widely distributed Strumigenys silvestrii, but in that species the apicoscrobal and pronotal humeral hairs are stiff and feebly remiform or somewhat flattened apically, rather than long fine and flagellate. Also, silvestrii lacks spongiform tissue ventrally on the petiole, a feature present in both calamita and perdita.
Longino (Ants of Costa Rica) - Mandible somewhat bowed; apical fork of mandible without intercalary tooth; mandible with long, spiniform preapical tooth about one quarter distance from apical fork to mandible base; minute denticle variably present one half to two thirds distance to mandible base; eye composed of 1-4 facets; gaster smooth with strong basal costulae; gaster with erect setae distinctly spatulate; leading edge of scape at the subbasal bend lacks a lamella; spiniform preapical tooth of mandible occurs closer to the apicodorsal tooth than to the proximal denticle.
Keys including this Species
Distribution
Latitudinal Distribution Pattern
Latitudinal Range: 10.433° to 9.266667°.
| North Temperate |
North Subtropical |
Tropical | South Subtropical |
South Temperate |
- Source: AntMaps
Distribution based on Regional Taxon Lists
Neotropical Region: Costa Rica (type locality), Honduras.
Distribution based on AntMaps
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
Images from AntWeb
 
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| Worker. Specimen code jtlc000007691. Photographer D. J. Cox, uploaded by California Academy of Sciences. | Owned by INBio. |
Nomenclature
The following information is derived from Barry Bolton's Online Catalogue of the Ants of the World.
- calamita. Strumigenys calamita Bolton, 2000: 550 (w.) COSTA RICA.
Unless otherwise noted the text for the remainder of this section is reported from the publication that includes the original description.
Description
Worker
Holotype. TL 1.8, HL 0.46, HW 0.36, CI 78, ML 0.25, MI 54, SL 0.28, SI 78, PW 0.23, AL 0.46. Closely related to Strumigenys perdita and mostly answering the description given for that species, but differing as follows.
1 Standing pilosity on petiole, postpetiole and first gastral tergite entirely of short stout hairs that are remiform to claviform. In profile all are curved or inclined posteriorly; in dorsal view some hairs on the first tergite are also curved toward the midline.
2 Spiniform preapical tooth on mandible set closer to apicodorsal tooth.
3 Cephalic ground-pilosity more narrowly spatulate.
4 Scapes and mandibles relatively somewhat shorter (compare SI and MI measurements).
Paratypes. TL 1.7-1.9, HL 0.46-0.50, HW 0.36-0.40, CI 76-80, ML 0.24-0.27, MI 51-56, SL 0.27-0.32, SI 75-81, PW 0.21-0.27, AL 0.44-0.52 (9 measured).
Type Material
Holotype worker, Costa Rica: Heredia, Est. Biol. La Selva, 50-150 m., 10°26'N, 84°01'W, 1.xii.1993, INBio-OET, bosque primario, B/07/315 (no collector's name) (The Natural History Museum).
Paratypes. Costa Rica: 2 workers with same data as holotype but 3.viii.1993, B/18/187 and B/19/188, bosque secondario; 2 workers with same data but 1.ix.1993, B/05/279 and B/07/280, bosque primario; 2 workers with same data but vii.1992, #3203-S (J. Longino); 1 worker with same data but 1992, litter/soil arthropod study, #C-l (U. Wagner); 3 workers, Heredia, La Selva, 50 m., 10°26'N, 83°59'W, 20.iii.1987, #243 (D. M. Olson); 1 worker, Provo Heredia, 13 km. SSW Pto Viejo, 10°21'N, 84°03'W, 300 m., 17.vii.1986, wet forest, litter sample, #1390-S (J. Longino) (BMNH, Instituto Nacional de Biodiversidad, Museum of Comparative Zoology, University of California, Davis, Los Angeles County Museum of Natural History, John T. Longino Collection).
References
- Bolton, B. 2000. The ant tribe Dacetini. Memoirs of the American Entomological Institute. 65:1-1028. (page 550, worker described)
References based on Global Ant Biodiversity Informatics
- Basset Y., L. Cizek, P. Cuenoud, R. K. Didham, F. Guilhaumon, O. Missa, V. Novotny, F. Odegaards, T. Roslin, J. Schmidl et al. 2012. Arthropod diversity in a tropical forest. Science 338(6113): 1481-1484.
- Bolton, B. 2000. The Ant Tribe Dacetini. Memoirs of the American Entomological Institute 65
- Fernández, F. and S. Sendoya. 2004. Lista de las hormigas neotropicales. Biota Colombiana Volume 5, Number 1.
- Longino J. T. L., and M. G. Branstetter. 2018. The truncated bell: an enigmatic but pervasive elevational diversity pattern in Middle American ants. Ecography 41: 1-12.
- Longino J. T., and R. K. Colwell. 2011. Density compensation, species composition, and richness of ants on a neotropical elevational gradient. Ecosphere 2(3): 16pp.
- Longino J. et al. ADMAC project. Accessed on March 24th 2017 at https://sites.google.com/site/admacsite/