Trachymyrmex

Mayhé-Nunes, Antonio J. & Brandão, Roberto F., 2007, Revisionary studies on the attine ant genus Trachymyrmex Forel. Part 3: The Jamaicensis group (Hymenoptera: Formicidae), Zootaxa 1444, pp. 1-21: 4

publication ID

10.5281/zenodo.176090

publication LSID

lsid:zoobank.org:pub:95B27C8F-AE2B-494A-9F51-66F3773F7603

persistent identifier

http://treatment.plazi.org/id/4D2987BE-5A25-FFFF-FF68-FD838A902496

treatment provided by

Plazi

scientific name

Trachymyrmex
status

 

Key to Trachymyrmex  of the Jamaicensis  species group (workers)

1 With the body in side view, length of lateral pronotal and anterior mesonotal projections notably different, either the mesonotal is much bigger than pronotal ( Fig. 10View FIGURES 9 – 12), or appears as a multitubercular low tumulus ( Fig. 16View FIGURES 15 – 18) ...................................................................................................................................................... 2

- Lateral pronotal and anterior mesonotal projections almost of the same size or the mesonotal a little shorter, but always spine-like ...................................................................................................................... 3

2 Lateral pronotal spine-like projections shorter and slenderer than anterior mesonotal ones; midpronotal projections present; pronotal inferior corner and anterior margin of katepisternum unarmed; postpetiole in dorsal view trapezoidal, little broader behind than in front, its postero-dorsal border straight .................... ............................................................................................................ T. isthmicus  Santschi ( Figs 9 –14View FIGURES 9 – 12View FIGURES 13 – 14, 30)

- Lateral pronotal spine-like projections longer than tumuliform and multituberculated anterior mesonotal ones; midpronotal projections absent or obsolete; pronotal inferior corner and anterior margin of upper region of katepisternum armed with a notable triangular tooth; postpetiole in dorsal view broader than long, its posterior border concave ............................................................ T. ixyodus  n. sp. ( Figs. 15 –18View FIGURES 15 – 18, 30)

3 Apically spatulate curved coarse hairs distributed over the whole body ( Figs. 3View FIGURES 1 – 4, 26View FIGURES 23 – 26) ............................... 4

- Curved coarse hairs apically spatulate absent over the whole body, except gaster .................................... 5

4 Antennal scape scarcely surpassing the posterior margin of head when lodged in the scrobe, with head in frontal view; anterior margin of the crenate frontal lobe with a protruded pointed tooth; propodeal spines distinctly longer than the distance between their inner bases (better seen in postero-dorsal view) .............. ................................................................................................................... T. zeteki  Weber ( Figs 23 –26View FIGURES 23 – 26, 30)

- Antennal scape surpassing the posterior margin by nearly a third of its length, when lodged in the scrobe, with head in frontal view; anterior margin of the smooth frontal lobe unarmed; propodeal spines distinctly shorter than the distance between their inner bases (better seen in postero-dorsal view) ............................. .................................................................................................................. T. atlanticus  n. sp. ( Figs 1 –5View FIGURES 1 – 4View FIGURES 5 – 8, 30)

5 Base of the anterior mesonotal spine thicker than the base of lateral pronotal ones; midpronotal projections absent or rarely represented by a pair of minute separate spines; supraocular projection spine-like; head and gaster darker than yellowish brown mesosoma; last funicular segments as dark as antennal scapes ............................................................................................. T. jamaicensis  (André) ( Figs 19 –22View FIGURES 19 – 22, 29)

- Base of the anterior mesonotal spine almost as thin as the base of lateral pronotal ones; midpronotal projection represented by a single truncate tooth; supraocular projection absent or vestigial; the whole body dark reddish brown; last funicular segments lighter than other antennal segments ..................................... ............................................................................................... T. haytianus  Wheeler & Mann ( Figs 5 –8View FIGURES 5 – 8, 29)