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Current View: Neotropical: Mato Grosso do Sul
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Species: Gnamptogenys striatula   Mayr, 1884 

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See Also:

Gnamptogenys striatula angustiloba, Gnamptogenys striatula antillana

Taxonomic History (provided by Barry Bolton, 2015)

Gnamptogenys striatula Mayr, 1884: 32 (w.) FRENCH GUIANA. Neotropic. AntCat AntWiki

Taxonomic history

Mayr, 1887 PDF: 542 (q.m.); Gallardo, 1918c PDF: 26 (q.m.); Wheeler & Wheeler, 1952a PDF: 123 (l.).
Combination in Ectatomma (Holcoponera): Mayr, 1887 PDF: 541; in Holcoponera: Emery, 1911e PDF: 40; in Gnamptogenys: Brown, 1958g PDF}: 229.
Senior synonym of Gnamptogenys obscurum: Santschi, 1929h PDF: 442; of Gnamptogenys antillana: Brown, 1956b PDF}: 490.
of Gnamptogenys angustiloba (and its junior synonym Gnamptogenys vollenweideri), Gnamptogenys angustipleura, Gnamptogenys brasiliensis, Gnamptogenys calcarata, Gnamptogenys paulina, Gnamptogenys pernambucana, andmaterial of the unavailable name Gnamptogenys hybrida referred here: Brown, 1958g PDF}: 229; of Gnamptogenys arcuata, Gnamptogenys curtulum (and its junior synonym Gnamptogenys stolli), Gnamptogenys recta, Gnamptogenys rustica, Gnamptogenys simplicoides, Gnamptogenys wasmanni (and its junior synonym Gnamptogenys isthmica), Gnamptogenys wheeleri (and its junior synonym Gnamptogenys mayri): Lattke, 1995: 186.


Paraguay: Amambay, Cordillera


J. Longino, 18 Aug 2014: Regarding Gnamptogenys wheeleri, I now have two collections from Costa Rica and one from Tambopata, Peru, that look identical and have a distinctively depressed dorsal face of the propodeum. Santschi (1929) observed this distinctive morphology and it is illustrated in his Figure 18. He associated the taxa G. rustica, wheeleri, and brasiliensis mayri with this feature, all new taxa described in his revision of Holcoponera. Brown (1958) left rustica and wheeleri as valid species but synonymized mayri under wheeleri, with no discussion. The type locality is Costa Rica for both wheeleri and mayri, and the images of types of both on AntWeb show the distinctive character, so this synonymy is probably solid. Lattke (1995) synonymized them all under striatula.

Gnamptogenys striatula and the form with the depressed propodeum are sympatric in Costa Rica and have different habitat preferences. The former is found in open, disturbed areas, and the latter is a mature forest species. Also, wheeleri has a square-cut anteroventral petiolar process, while the Costa Rican version of striatula has a rounded process without a posterior angle. I consider G. wheeleri a valid species and use this name to refer to this form. With my current knowledge, it occurs at least in Costa Rica and Peru. The relationship to G. rustica, from Paraguay, is unknown. Also, among the South American specimens associated with striatula there is a welter of variation in propodeal shape and the form of the ventral petiolar process. The group is clearly in need of more work in South America.

Taxon Page Author History

On 2014-08-18 18:18:32 jack longino modified Comments
On 2014-08-18 18:09:28 jack longino modified Comments

Taxonomic Treatment (provided by Plazi)

Radoszkowsky, O., 1884:
Operaria: Long 4,3 - 4,6 mm. Fusco-nigra (nonnunquam partim castanea), mandibulis, antennis pedibusque castaneo - ferrugineis, femoribus obscurioribus; micans, abstante pilosa, haud pubescens, dense et regulariter longitrorsum striata; man-dibulae nitidae, ruguloso-striatae, triangulares angulo postico-interno obtuso, sed distincto, margine masticatorio acuto, an-tice indistincte crenulata; clypeus margine antico arcuato; pro-notum antice striis transversis, extus curvatis et retro direc-tis; metanotum inerme planitie deciivi verticali et concava, a planitie basali separata carina arcuata distincta; petioli nodus supra transverse (indistincte concentrice) striatus, absque processu.
G. concentricae Mayr simillima differt magnitudine majore, striis distinctissime subtilioribus et densius approximatis, deinde carina arcuata inter metanoti partem basalem et declivem.

Wild, A. L., 2007:
Amambay, Cordillera, “Paraguay” (s.loc) (ALWC, INBP, MHNG, NHMB, NHMW). Literature records: Cordillera, “Paraguay” (s. loc.) (Forel 1911g, Santschi 1929c).

Specimen Habitat Summary

Found most commonly in these habitats: 8 times found in 2º tropical rainforest, 5 times found in garden, 2 times found in montane forest, 1 times found in 2nd growth riparian forest, 1 times found in roadside, 2 times found in tropical dry forest, 2 times found in Bamboo forest, 1 times found in wet forest fragment, 2 times found in forest, 1 times found in wet trop. forest, ...

Collected most commonly using these methods or in the following microhabitats: 11 times Winkler, 9 times MiniWinkler, 4 times search, 1 times Pitfall trap

Elevations: collected from 5 - 1200 meters, 272 meters average

Type specimens: syntype of Ectatomma curtula paulina: casent0907169; syntype of Ectatomma curtulum stolli: casent0907168; syntype of Ectatomma striatulum angustipleura: casent0907175; syntype of Ectatomma striatulum simplicoides: casent0907176; syntype of Ectatomma striatulum angustiloba: casent0907174; syntype of Ectatomma curtulum: casent0903839; syntype of Ectatomma obscurum: casent0903834; syntype of Gnamptogenys striatula: casent0900551; syntype of Holcoponera brasiliensis calcarata: casent0915123; syntype of Holcoponera brasiliensis pernambucana: casent0915125; syntype of Holcoponera brasiliensis simplicoides hybrida: casent0915124; syntype of Holcoponera emeryi recta: casent0915120; syntype of Holcoponera rustica: casent0915121; syntype of Holcoponera striatula antillana: casent0915122; syntype of Holcoponera wasmanni isthmica: casent0915128; syntype of Holcoponera brasiliensis: casent0903837; syntype of Holcoponera curtula vollenweideri: casent0907170

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