Pheidole uranus,

Salata, Sebastian & Fisher, Brian L., 2020, The ant genus Pheidole Westwood, 1839 (Hymenoptera: Formicidae) in Madagascar-taxonomic revision of the bessonii species-group, Zootaxa 4843 (1), pp. 1-64: 54-56

publication ID

https://doi.org/10.11646/zootaxa.4843.1.1

publication LSID

lsid:zoobank.org:pub:57044928-1950-4525-850E-E381A52599A1

DOI

http://doi.org/10.5281/zenodo.4488409

persistent identifier

http://treatment.plazi.org/id/03938025-FFBB-A921-A7D8-B3E6FA9EFEBC

treatment provided by

Plazi

scientific name

Pheidole uranus
status

sp. nov.

Pheidole uranus  sp. nov.

Figs 24View FIGURE 24 A–F, 27P, 28P

HOLOTYPE: 1s., Madagascar, Toliara, Anosy Region, Anosyenne Mts , 31.2 km NW Manantenina, -24.13894 47.06804, 1125 m, 26-Feb-2015, rainforest, ex root mat, B. L. Fisher et al. leg. BLF36505View Materials, CASENT0704257 ( CASC)GoogleMaps  . PARATYPES: 1w., the same data as holotype, CASENT0923260 ( CASC)GoogleMaps  .

Other material. Madagascar. Toliara: 4w., 2s  ., 1m., 1q., Anosy Region, Anosyenne Mts , 31.2 km NW Manantenina, -24.13894 47.06804, 1125 m, B. L. Fisher et al. leg. ( CASC)GoogleMaps  ; 2w., 1s., 1m.GoogleMaps  , Anosy Region, Anosyenne Mts   GoogleMaps, 31.2 km NW Manantenina, -24.13632 47.05485, 1315 m, B. L. Fisher et al. leg. ( CASC).

Geographic range. Madagascar, Toliara, Anosyenne Mts.

Diagnosis. Major workers. Head in full-face view sub-rectangular, not widening posteriorly, with lateral margins slightly convex; side of head with dense, long, erect pilosity; medial frons with moderately sparse and thick rugae; interspaces between rugae smooth; frons laterally with dense rugae; interspaces between rugae reticulate; occipital lobes mostly smooth, posteriorly with sparse and weakly developed rugae; scape, when laid back, slightly exceeding the midlength of head; inner hypostomal tooth distinct, moderate and bulge-like, with top arching posteroventrally; outer hypostomal tooth bulge-like, high, and wide, with top arching posteroventrally; median tooth absent; promesonotum short, angular, and moderately low; posterior mesonotum smoothly descending towards propodeum; mesonotal process very distinct and tubercle-like; mesosoma rugoreticulate; promesonotal dorsum with reduced rugoreticulae and few additional transverse and thick rugae; gaster indistinctly shagreened at base of first tergite; body brown. Minor workers. Occiput slightly elongated; nuchal collar indistinct; head sculpture mostly smooth; frons with weakly developed and sparse puncta; scape, when laid back, exceeding the posterior head margin by three-fifths of its length; promesonotum low, moderately long, and arched; promesonotal groove distinct; metanotal groove distinct; propodeal spines small and with wide base; mesosoma mostly smooth; pronotum, mesonotum, and propodeum with weakly developed and sparse puncta; body brown.

Description. Major workers. Measurements (n=4): HL: 2.08–2.16 (2.12); HW: 2.09–2.14 (2.11); SL: 1.19– 1.24 (1.21); EL: 0.21–0.25 (0.23); WL: 1.82–1.91 (1.86); PSL: 0.33–0.37 (0.35); MTL: 1.38–1.41 (1.4); PNW: 0.81–0.97 (0.86); PTW: 0.26–0.29 (0.27); PPW: 0.69–0.76 (0.72); CI: 99.0–103.3 (100.4); SI: 56.5–59.0 (57.5); PSLI: 15.6–17.5 (16.6); PPI: 35.6–38.5 (37.3); PNI: 38.8–45.4 (40.8); MTI: 65.8–67.3 (66.5).

Head. In full-face view sub-rectangular, not widening posteriorly, with lateral sides slightly convex ( Fig. 24BView FIGURE 24). In lateral view sub-oval, not depressed posteriorly; ventral and dorsal margins convex; inner hypostomal tooth visible. Side of head with dense, long, and erect pilosity; head dorsum with relatively dense, long, decumbent to erect pilosity. Medial frons with moderately sparse and thick rugae; interspaces between rugae smooth. Frons laterally with dense rugae; interspaces between rugae reticulate. Occipital lobes mostly smooth; posteriorly with sparse and weakly developed rugae. Gena with dense and thick costulae; interspaces between costulae distinctly rugulate. Sides posterolateral from eyes with dense and thinner network of rugoreticulae. Center of clypeus shiny and smooth, lateral sides with distinct rugulae; median notch present, moderately wide and shallow; median longitudinal carina absent; lateral longitudinal carinae present. Scape, when laid back, slightly exceeding the midlength of head; pilosity appressed and subdecumbent ( Fig. 24B, DView FIGURE 24). Inner hypostomal tooth distinct, moderate and bulge-like, with top arching posteroventrally; outer hypostomal tooth bulge-like, high, and wide, with top arching posteroventrally; median tooth absent ( Fig. 27PView FIGURE 27). Mesosoma. In lateral view, promesonotum short, angular, and moderately low; posterior mesonotum smoothly descending towards propodeum; mesonotal process very distinct and tubercle-like; promesonotal groove absent; metanotal groove indistinct; propodeal spines long with narrow base and acute top; humeral tubercle weakly produced ( Fig. 24DView FIGURE 24). Surface shiny and rugoreticulate; promesonotal dorsum with reduced rugoreticulae and few additional transverse, thick rugae. Pilosity moderately dense, moderately long, and erect ( Fig. 24D, FView FIGURE 24). Gaster. Shiny and indistinctly shagreened at base of first tergite; pilosity moderately sparse, long, and erect ( Fig. 24D, FView FIGURE 24). Color. Brown, legs and antennae slightly brighter ( Fig. 24D, FView FIGURE 24).

Description. Minor workers. Measurements (n=5): HL: 0.79–0.95 (0.87); HW: 0.57–0.67 (0.62); SL: 1.11– 1.19 (1.15); EL: 0.15–0.17 (0.16); WL: 1.13–1.32 (1.2); PSL: 0.1–0.14 (0.12); MTL: 0.95–1.09 (1.04); PNW: 0.41– 0.51 (0.46); PTW: 0.09–0.13 (0.11); PPW: 0.17–0.22 (0.19); CI: 132.0–143.4 (139.3); SI: 178.8–193.7 (185.7); PSLI: 12.8–15.5 (14.2); PPI: 50.6–70.1 (57.4); PNI: 70.7–77.0 (73.5); MTI: 164.0–177.1 (167.3).

Head. In full-face view oval, posterior region slightly elongated; nuchal collar weakly developed ( Fig. 24AView FIGURE 24). Pilosity sparse, moderately long and subdecumbent. Sculpture shiny and mostly smooth; frons with weakly developed and sparse puncta. Clypeus with median longitudinal carina absent; two lateral longitudinal carinae absent. Scape, when laid back, exceeding the posterior head margin by three-fifths of its length; pilosity dense, subdecumbent to erect ( Fig. 24A, CView FIGURE 24). Mesosoma. In lateral view, promesonotum low, moderately long, and arched; promesonotal groove distinct; metanotal groove distinct; propodeal spines small and triangular, with wide base ( Fig. 24CView FIGURE 24). Sculpture mostly smooth; pronotum, mesonotum, and propodeum with weakly developed and sparse puncta. Pilosity very sparse, short, and erect ( Fig. 24C, EView FIGURE 24). Gaster. With sparse and erect pilosity ( Fig. 24C, EView FIGURE 24). Color. Bright brown ( Fig. 24C, EView FIGURE 24).

Biology. The species was collected between 1125–1315 m elevation, in rainforest. Nests were located in rotten logs and root mats.

Comments. Pheidole uranus  is known only from the Anosyenne Mts. in Toliara. Its major workers are most similar to two species known from northern parts of the island: P. madecassa  and sympatric P. maro  . Majors of P. uranus  can be easily separated based on presence of dense rugae with reticulate interspaces on lateral frons, sparse and weakly developed rugae on posterior occipital lobes, dense pilosity on side of head, and darker body coloration. Majors of P. madecassa  and P. maro  have lateral frons with weaker sculpture, posterior occipital lobes with reduced or absent sculpture, sparser pilosity on side of head, and orange to brownish orange body. Minors of P. uranus  are most similar to P. ovalinoda  and can be separated based on more elongated posterior portion of head, and mostly smooth mesosoma. Minors of P. ovalinoda  have less elongated posterior portion of head, and partially sculptured mesosoma.

Etymology. Named after the Greek god of the sky, in reference to the high elevation of the type locality.

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Hymenoptera

Family

Formicidae

Genus

Pheidole