Probolomyrmex brujitae

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Probolomyrmex brujitae
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Proceratiinae
Tribe: Probolomyrmecini
Genus: Probolomyrmex
Species: P. brujitae
Binomial name
Probolomyrmex brujitae
Agosti, 1995

Probolomyrmex brujitae F12A.jpg

Probolomyrmex brujitae F12C.jpg

All known specimens of this species were obtained from leaf-litter samples, with the two type specimens being collected by Winkler bags of sifted leaf litter from a secondary Yungas forest.

Identification

Oliveira & Feitosa (2019) - Postero-ventral lobe of petiole long and subquadrate. Subpetiolar process weakly developed and anteriorly directed. Prora and protuberance on posterior region of first gastral tergite absent.

This species differs from all others by the weak, anteriorly directed subpetiolar process.

Keys including this Species

Distribution

Distribution based on Regional Taxon Lists

Neotropical Region: Argentina (type locality), Brazil.


Distribution based on AntMaps

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Distribution based on AntWeb specimens

Check data from AntWeb

Biology

Castes

Worker

Oliveira & Feitosa (2019). Figure 11. SEM micrography of Probolomyrmex brujitae (worker - DZUP 549768). A. Habitus. B. Mandibles (he = hypostomal margin; esm = external surface of basal region of mandible). C. Antenna (ap = antennal pit; lah = long appressed hair; sh = short basicnonic hair). D. Metapleural gland. E. Petiole (pil = postero-inferior lobe of petiole; sp = subpetiolar process).

Queen

Oliveira & Feitosa (2019). Figure 13. Probolomyrmex brujitae queen - DZUP 549768. A. Habitus. B. head in frontal view. C. dorsal view.

Nomenclature

The following information is derived from Barry Bolton's New General Catalogue, a catalogue of the world's ants.

  • brujitae. Probolomyrmex brujitae Agosti, 1995: 433, figs. 5, 6, 9, 10, 14 (w.q.) ARGENTINA.

Unless otherwise noted the text for the remainder of this section is reported from the publication that includes the original description.

Description

Oliveira & Feitosa (2019) - Worker measurements: (n=12) HL 0.48–0.56; HW 0.30–0.33; SL 0.28–0.33; WL 0.61–0.70; PL 0.22–0.34; PW 0.24–0.26; PH 0.20–0.24; TL 2.17–2.41; CI 56.5–64; SI 56.5–64.5; PI 75.5–92.5.

Worker description: Frontoclypeal shelflike projection and mandibles foveolate, with hair-bearing tubercles or cylindrical micro-pegs; external surface of mandibular basal margin transversely striolate. Tip of apical antennal segment bearing minute pits. Mesopleuron, metapleuron and lateral faces of propodeum alveolate and foveate; alveoli denser just above metapleural gland orifice; opening of metapleural gland narrow, with smooth anterior region, surrounded by rows of hairs. Petiolar node foveate, interval between foveae covered by micropunctures (punctulae); postero-ventral lobe and latero-ventral region of petiole alveolate, with short hair projecting from each alveolus; subpetiolar process alveolate. Posterior region of second gastral segment with foveae.

Space between mesosomal foveae covered by dense pubescence. Pygidium with hair-bearing tubercles or cylindrical micro-pegs.

Head 1.6 times longer than wide. Hypostomal margin curved. Antennal scapes extend to head mid length, distance from scape apex to of head more than two times pedicel length (SI 56.5–64.5). Propodeal declivity with lateral carina, laterodorsal teeth present. Petiole in lateral view at least 1.2 times longer than high (PI 75.5–92.5), apex with two weakly developed posterior teeth; posterior face short, concave and smooth; postero-ventral lobe long and subquadrate; subpetiolar process weakly developed and directed anteriorly. First gastral segment without prora or dorsal protuberance on posterior region of tergite.

Queen

Oliveira & Feitosa (2019) - (n=3) HL 0.50–0.52; HW 0.32–0.33; SL 0.31–0.33; WL 0.67; PL 0.23–0.25; PH 0.21–0.22; TL 2.21– 2.28. CI 64.5; SI 62.5–64.5; PI 85.5–92.

Queen presents the characters already described in the genus description and the diagnostic characters of the workers.

Type Material

  • Holotype 1 worker, Argentina, Jujuy, Aguas Blancas-Yaculica (Argentinian-Bolivian Frontier), 22°43'44"S 64°22'25"W, 460 m, 25 October 1994, D. Agosti & J. M. Carpenter, Winkler sample, leaf litter, Yungas forest (Museum of Comparative Zoology).
  • Paratype 1 female, same Winkler sample as holotype. Publication says deposited at Instituto Miguel Lillo Tucuman but Oliveira & Feitosa (2019) note this specimen is present in American Museum of Natural History (www.antweb.org; specimen CASENT0104672).

Taxonomic Notes

Oliveira & Feitosa (2019) - There is a record of a single individual of P. brujitae in Bahia, Brazil (Nascimento et al. 2004). However, after careful examination of the specimen, we concluded it actually corresponds to a different and undescribed species. We refrain from describing it since the only known specimen is in very poor condition.

References