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Pheidole transversostriataHNS Mayr 1887: 584. Syn.: Pheidole transversostriata var. nigridensHNS Forel 1901 j: 362, n. syn. ; Pheidole lacerta WheelerHNS 1922e: 6, n. syn. Possible synonym: Pheidole scalarisHNS new species , this monograph. Raised to species level in this monograph and placed in the tachigaliaeHNS group: gibbataHNS.
Types Naturhist. Mus. Wien.
Diagnosis A member of the transversostriataHNS group distinguished in the major by the broad ladder-like array of transverse carinae that extend unbroken from the occiput to the frontal lobes where they curve anteriorly to the ends of the lobes. It is close to scalarisHNS of Costa Rica, differing in the major in the lack of rugoreticulum on the occiput (completely reticulate in scalarisHNS) and less elongate head (Head Length 1.2X Head Width versus Head Length 1.3X Head Width in scalarisHNS), and in the minor by the completely foveolate sides of the pronotum (versus smooth and shiny in scalarisHNS). However, a major syntype of transversostriataHNS " var. nigridensHNS " from Colombia has the corners of the occiput rugoreticulate and is thus intermediate between transversostriataHNS and scalarisHNS in this character. The two forms may prove to be geographic variants (or good species) when more material becomes available. Measurements (mm) Unique holotype major: HW 0.66, HL 0.80, SL 0.34, EL 0.10, PW 0.36. Minor (St. Thomas, Virgin Islands): HW 0.40, HL 0.44, SL 0.36, EL 0.06, PW 0.26.
color Major: medium yellowish brown, with head a shade lighter and gaster a shade darker than mesosoma and waist. Minor: concolorous yellowish brown, legs clear yellow.
range P. transversostriataHNS is evidently a wide-ranging but locally uncommon species, known from scattered records from St. Thomas, Virgin Islands, and Trinidad (Port of Spain) to the Guianas, Colombia, and Rio de Janeiro and Santa Catarina, Brazil.
biology Forel (1901J) collected the species from soil in Colombia.
figure Upper: major (syntype of synonymous P. lacerta WheelerHNS, Port of Spain, Trinidad, compared with unique holotype of P. transversostriataHNS). Lower: minor (Inner Brass, St. Thomas, Virgin Islands, associated with major compared with transversostriataHNS holotype). (Type locality: Guianas.) Scale bars = 1 mm.
Found most commonly in these habitats: 3 times found in SAT, 3 times found in 2nd growth dry forest, 7 times found in tropical rainforest, some big trees, 3 times found in La Selva, 2 times found in dry forest, 1 times found in house clearing, 5 times found in tropical rainforest, with some big trees, probably a mix of primary and secondary forest, 1 times found in Puesto19,158G. 10m., 3 times found in mature wet forest, 3 times found in montane wet forest, ...
Found most commonly in these microhabitats: 14 times at bait, 3 times Hojarasca, 9 times ex sifted leaf litter, 2 times at bait on ground, 1 times nest in soil, 5 times Primary forest, 1 times in soil of clay bank, 3 times bajo de M/28, 1 times At baits on ground; primary forest along CES; part of project for OTS managed ec, 1 times ex fungi and rotten wood, 1 times bajo de M/01, ...
Collected most commonly using these methods: 16 times baiting, 4 times search, 4 times Winkler, 4 times bait, 7 times Berlese, 8 times miniWinkler, 5 times Lure/Bait, 4 times flight intercept trap, 1 times Unknown, 2 times Fogging, 2 times Malaise, ...
Elevations: collected from 50 - 860 meters, 161 meters average
Type specimens: Lectotype Pheidole transversostriata: casent0601287; paratype Pheidole scalaris: jtlc000016522; syntype of Pheidole transversostriata nigridens: casent0904447, casent0904448, casent0908300, casent0908301