Pseudomyrmex nigrocinctus (Ward, Philip S. 1993)
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BibTeX: @article{Ward1993JournalofHymenopteraResearch2, RIS/ Endnote: TY - JOUR Wikipedia/ Citizendium: <ref name="Ward1993Journal of Hymenoptera Research2">{{Citation |
Ordo: Hymenoptera
Familia: Formicidae
Genus: Pseudomyrmex
Name
Pseudomyrmex nigrocinctus Ward, Philip S., 1993 – Wikispecies link – Pensoft Profile
- Pseudomyrmex nigrocinctus Ward, Philip S., 1993, Journal of Hymenoptera Research 2: 144-146.
Description
(Figs. 13, 22, 56, 72)
Materials Examined
Costa Rica Alajuela A. Alfaro Costa Rica Alajuela A. Alfaro Costa Rica Alajuela A. Alfaro Costa Rica Alajuela A. Alfaro Costa Rica Alajuela A. Alfaro Costa Rica Tivives, embouchure de Jesus-Maria A. Alfaro Costa Rica Tivives, embouchure de Jesus-Maria A. Alfaro Costa Rica Costa Rica Costa Rica Costa Rica San Jose H. Schmidt
Description
Worker measurements (n = 21). - HL 0.89-1.08, HW 0.74-0.85, MFC 0.035-0.051, Cl 0.75-0.84, REL 0.40-0.45, REL2 0.51-0.56, OOI 1.39-2.76, VI 0.62-0.78, FCI 0.044-0.065, SI 0.44-0.48, SI2 0.81-0.89, NI 0.58-0.64, PLI 0.59-0.68, PWI 0.49- 0.61, PPWI 1.10-1.30.
Diagnosis
Worker diagnosis. - Small species with elongate head and short eyes (REL ≤0.45, REL ≤2 0.56, EL / LHT ≤0.61). Palp formula 5,3. Median clypeal lobe rather narrow, its surface and anterior margin convex. Frontal carinae separated by about basal scape width (FCI ≈0.055). Metanotal groove well marked; basal and declivitous faces of propodeum subequal (Fig. 22). Petiole short (PLI> 0.57), its anterior peduncle broad in dorsal view (PWI 3 0.50- 0.61) and not well differentiated from the node (Fig. 22). Petiole lacking expanded posterolateral comers. Postpetiole less broad than in most other species in the P. ferrugineus group (see PPWI values). Head densely punctulate and subopaque, becoming sublucid posteriorly where the punctulae are separated by shiny interspaces. Mesosoma punctulate to (laterally) coriarious-imbricate, sublucid, becoming subopaque on the propodeum. Standing pilosity moderately common (as in Fig. 22); pubescence dense and closely appressed. Orange-brown, often with anterolateral fuscous patches on abdominal tergite IV (these form a distinct transverse black band in queens).
Discussion
Comments. - Workers and queens of P. nigrocinctus are easily distinguished from all other acacia ants, except P. particeps (see below), by their small size (HW <0.86 in both castes), elongate head in the worker (worker Cl <0.85), and narrow petiole and postpetiole (worker PWI 3≥0.50, worker PPWI ≤1.30, queen PWI 2 0.57-0.63). The orange color and short eyes are also characteristic.
Distribution
Distribution and biology. - P. nigrocinctus is found from Guatemala to Costa Rica, with most records coming from the southern end of its range (Fig. 72). Colonies are monogynous, and have been collected from Acacia collinsii, A. cornigera and A. hindsii. Records from Acacia gentlei and A. globulifera (Beulig & Janzen 1969:59) need to be confirmed because of possible confusion with P. peperi. Janzen's (1967b) observations on " P. nigrocincta " in Mexico refer to P. peperi. On the other hand descriptions of the biology and behavior of P. nigrocinctus in Costa Rica (Janzen 1973, 1974, 1975, 1983; Beulig & Janzen 1969) are reliably attributed to P. nigrocinctus.
Materials Examined
Costa Rica Alajuela A. Alfaro Costa Rica Atenas A. Alfaro Costa Rica Cascajal A. Alfaro Costa Rica Escobal A. Alfaro Costa Rica Ojo de Agua A. Alfaro Costa Rica Turrucares P. P. Calvert Costa Rica 1.4 mi N La Cruz D. H. Janzen Costa Rica 10.7 mi NW Liberia D. H. Janzen Costa Rica 10 mi NW Liberia D. H. Janzen Costa Rica 10 mi NW Liberia D. H. Janzen Costa Rica 2 mi S Canas D. H. Janzen Costa Rica 4 km N Canas D. H. Janzen Costa Rica 5 km S Liberia D. H. Janzen Costa Rica 7 km N Canas D. H. Janzen Costa Rica El Coco R. J. Hampton Costa Rica Finca Taboga, 6 mi S, 6 mi W Canas D. H. Janzen Costa Rica Garita A. Alfaro Costa Rica Hda. La Pacifica, nr. Canas P. S. Ward Costa Rica La Cueva, 12 km N Liberia D. H. Janzen Costa Rica Palo Verde D. E. Gill Costa Rica Palo Verde D. H. Janzen Costa Rica Palo Verde D. M. Olson Costa Rica Santa Cruz P. P. Calvert Costa Rica Santa Rosa Natl. Pk. P. S. Ward Costa Rica Santa Rosa Natl. Pk. J. Longino Costa Rica Santa Rosa Natl. Pk. P. S. Ward Costa Rica Santa Rosa Natl. Pk. P. S. Ward Costa Rica Santa Rosa Natl. Pk. P. S. Ward Costa Rica Tempisque A. Alfaro Costa Rica 2 km E Tivives L. S. Farley Costa Rica Tivives A. Alfaro Costa Rica 3.5 km NE Santiago de Pur D. H. Janzen Costa Rica San Jose H. Schmidt Costa Rica San Jose c. u. Costa Rica "Costa Rica" c. u. Guatemala 2.0 mi NE Rio Hondo [on CA-9] D. H. Janzen Guatemala 22.3 mi SW Quirigua [on CA- 9] D. H. Janzen Honduras 7.4 mi NE Choluteca D. H. Janzen Nicaragua 11.7 mi E San Benito D. H. Janzen Nicaragua 13.1 mi N San Isidro D. H. Janzen Nicaragua 2.5 mi N Condega D. H. Janzen Nicaragua 6.8 mi N San Isidro D. H. Janzen Nicaragua 7.5 mi NW San Isidro D. H. Janzen Nicaragua Izapa J. M. Maes Nicaragua 3 mi W Somoto D. H. Janzen Nicaragua 15.8 mi NW Sebaco D. H. Janzen Nicaragua 2.6 mi N Dario D. H. Janzen Nicaragua 4.5 mi SE Dario D. H. Janzen Nicaragua 4 mi S Dario D. H. Janzen Nicaragua 1 km W Penas Blancas D. H. Janzen Nicaragua C. R. border, 1 mi N Penas Blancas [=1 mi N Penas Blancas] D. H. Janzen Nicaragua Isla Ometepe F. Joyce
Taxon Treatment
- Ward, Philip S.; 1993: Systematic studies on Pseudomyrmex acacia-ants (Hymenoptera: Formicidae: Pseudomyrmecinae), Journal of Hymenoptera Research 2: 144-146. doi
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