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Strumigenys trymala
| Strumigenys trymala | |
|---|---|
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Insecta |
| Order: | Hymenoptera |
| Family: | Formicidae |
| Subfamily: | Myrmicinae |
| Tribe: | Attini |
| Genus: | Strumigenys |
| Species: | S. trymala |
| Binomial name | |
| Strumigenys trymala (Bolton, 1983) | |
Nothing is known about the biology of Strumigenys trymala.
Identification
A member of the Strumigenys thuvida-group.
Bolton (1983) - Strumigenys thuvida and Strumigenys trymala are closely related and together are separated from Strumigenys tukulta as tabulated below. Differences between thuvida and trymala are given under the latter.
| thuvida and trymala | tukulta |
| Mandibles not clothed in scale-like hairs. | Mandible clothed in scale-like hairs. |
| Cephalic dorsum behind clypeus with arched simple hairs, and with flagellate hairs present (5 pairs). | Cephalic dorsum behind clypeus with appressed scale-like hairs; flagellate hairs absent. |
| Sides of pronotum with a few anteriorly situated foveolate punctures. | Sides of pronotum unsculptured. |
| Ventral appendage of petiole lobiform, not running the length of the segment. | Ventral appendage of petiole massively spongiform, running the length of segment. |
| Petiole node much broader than long in dorsal view, the posterior margin without a transverse bordering lamella. | Petiole node about as broad as long in dorsal view, the posterior margin with a broad transverse bordering lamella. |
| Anterior margin of postpetiolar disc concave in dorsal view. | Anterior margin of postpetiolar disc transverse in dorsal view. |
Keys including this Species
Distribution
Distribution based on Regional Taxon Lists
Afrotropical Region: Cameroun (type locality).
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
Nomenclature
The following information is derived from Barry Bolton's Online Catalogue of the Ants of the World.
- trymala. Glamyromyrmex trymalus Bolton, 1983: 333 (w.) CAMEROUN. Combination in Pyramica: Bolton, 1999: 1672; in Strumigenys: Baroni Urbani & De Andrade, 2007: 130. See also: Bolton, 2000: 333.
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 1.7, HL 0.43, HW 0.30, CI 70, ML 0.10, MI 23, (antennae lost), PW 0.22, AL 0.44. Extremely closely related to Strumigenys thuvida and answering to the description given for that species. In particular, trymala shows the same highly characteristic cephalic sculpture as thuvida, having numerous broad foveolate punctures with smooth spaces between them so that the head appears cratered. This very distinctive sculpture coupled with minute size, yellow colour, and the characters noted in the species-group diagnosis serve to isolate thuvida and trymala from all other Afrotropical Glamyromyrmex (=Strumigenys). The two are separated as follows.
| thuvida | trymala |
| Clypeal dorsum with appressed short scale-like to spatulate hairs. | Clypeal dorsum without appressed hairs of any description. |
| Elevated relatively long hairs absent from clypeal dorsum. | Elevated relatively long hairs present on clypeal dorsum. |
| Lateral and ventral appendages of postpetiole delicate and blister-like, translucent and with minute veins present. | Lateral and ventral appendages of postpetiole conspicuously spongiform. |
| With postpetiole in dorsal view the anterior margin of the disc broadly and deeply concave. | With postpetiole in dorsal view the anterior margin of the disc evenly shallowly concave. |
| Basalmost tooth of mandible only half the size of the second tooth from the base. | Basalmost tooth of mandible only very slightly smaller than the second tooth from the base. |
Type Material
Holotype worker, Cameroun: nr Yaounde, sample AAU (G. Terron) (Ecole Nationale Superieure Agronomique).
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. 1983. The Afrotropical dacetine ants (Formicidae). Bull. Br. Mus. (Nat. Hist.) Entomol. 46:267-416. (page 333, worker described)
- Bolton, B. 1999. Ant genera of the tribe Dacetonini (Hymenoptera: Formicidae). J. Nat. Hist. 3 33: 1639-1689 (page 1672, combination in Pyramica)
- Bolton, B. 2000. The ant tribe Dacetini. Memoirs of the American Entomological Institute. 65:1-1028. (page 333, redescription of worker)