P. parvulus is known only from two rainforest sites in Amazonas, Brazil (workers from canopy fogging project), and one rainforest location in the Sierra de Huanchaca, Bolivia (dealate queen on low vegetation). (Ward, 2017)
Ward (2017) - In this species the head is densely punctulate between the compound eyes and most of the body has a matte texture. In this respect P. parvulus is similar to Pseudomyrmex obtusus, but it is smaller in size (HW 0.56–0.60, with a more elongate head (CI 0.75–0.78) and a pair of setae on the pronotal humeri (absent in P. obtusus).
Keys including this Species
Distribution based on Regional Taxon Lists
Distribution based on AntMaps
Distribution based on AntWeb specimens
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P. parvulus is known only from two rainforest sites in Amazonas, Brazil (workers from canopy fogging project), and one rainforest location in the Sierra de Huanchaca, Bolivia (dealate queen on low vegetation).
The following information is derived from Barry Bolton's New General Catalogue, a catalogue of the world's ants.
- parvulus. Pseudomyrmex parvulus Ward, 2017: 539, figs. 8 (w.) BRAZIL.
Unless otherwise noted the text for the remainder of this section is reported from the publication that includes the original description.
(n = 3). HL 0.73–0.80, HW 0.56–0.60, MFC 0.005–0.007, LHT 0.40–0.43, CI 0.75– 0.78, REL 0.64–0.65, REL2 0.82–0.86, FCI 0.009–0.012, FI 0.52, PLI 0.63–0.71, PWI 0.52–0.60.
Smaller species (HW 0.56–0.60) with moderately elongate head and eyes (CI 0.75–0.78, REL 0.64–0.65); palp formula 5,3; juncture between dorsal and declivitous faces of propodeum subangulate, and with weak lateral tubercles (Fig. 8b); anterodorsal face of petiole ascending rapidly (Fig. 8b). Front of head between eyes densely punctulate and sublucid, the punctures separated by about their diameters; head sparsely punctulate and shiny around the ocelli, then more densely punctulate and sublucid at the posterior margin; mesosoma finely coriarious-imbricate and largely opaque; petiole, postpetiole and gaster with very fine dense pubescence, imparting a matte appearance. Standing pilosity very sparse, absent from petiole; a pair of setae present on the pronotal humeri and on the postpetiole (latter pair very short and inconspicuous). Medium yellowish-brown, the pronotum, petiole, postpetiole and appendages lighter.
Holotype worker. Brazil Amazonas: Paraná do Xiboreninho, 3°15ʹS, 60°00ʹW [mistranscribed on label as 06°00ʹW], 5 Aug 1979, Canopy Fogging Project, TRS#05, mixed water, Adis, Erwin, Montgomery et al. (Museu de Zoologia da Universidade de Sao Paulo) (CASENT0794102). Paratypes. 1 worker same data as holotype (Philip S. Ward Collection) (CASENT0762994); 1 worker, BRAZIL Amazonas: Rio Tarumã Mirím, 2 km from Rio Negro, 3°02ʹS, 60°17ʹW, 27 Jul 1979, Canopy Fogging Project, TRS#01, black water inundation forest, Adis, Erwin, Montgomery et al. (National Museum of Natural History) (CASENT0794103).