Trichomyrmex Mayr, 1865
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publication ID |
https://doi.org/ 10.5852/ejt.2016.246 |
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publication LSID |
urn:lsid:zoobank.org:pub:966C5DFD-72A9-4567-9DB7-E4C56974DDFA |
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DOI |
https://doi.org/10.5281/zenodo.6060798 |
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persistent identifier |
https://treatment.plazi.org/id/03F0F762-2C7D-9750-FDF9-53C48A2EFBD2 |
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treatment provided by |
Plazi |
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scientific name |
Trichomyrmex Mayr, 1865 |
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Genus Trichomyrmex Mayr, 1865
List of Arabian Trichomyrmex species:
almosayari sp. nov.
shakeri sp. nov.
Key to Arabian Trichomyrmex (workers)
1. Underside of head with abundant long ammochaete J-shaped hairs forming a distinct psammophore ( Fig. 1A View Fig. 1 ) ............................................................................................................................................ 2
– Underside of head with scattered short hairs or few long hairs but not forming a distinct psammophore ( Fig. 1 View Fig. 1 B) ............................................................................................................................................ 4
2. Unicolorous black species. Eyes reniform in profile, with distinctly concave ventral margin and broadly convex dorsal margin ( Fig. 1 View Fig. 1 C). Propodeal dorsum making an obtuse angle with propodeal declivity in profile ( Fig. 1 View Fig. 1 C). Posterior margin of head strongly concave in full-face view ( Fig. 6 View Fig. 6 C) (Saudi Arabia) ..................................................................................................... almosayari sp. nov.
– Bicoloured species. Head, mesosoma, petiole and appendages brown or reddish brown, gaster brown or blackish brown. Eyes nearly oval in profile ( Fig. 1 View Fig. 1 D). Propodeal dorsum making a continuous curve with propodeal declivity in profile ( Fig. 1 View Fig. 1 D). Posterior margin of head nearly straight or feebly concave in full-face view ( Fig. 7 View Fig. 7 C) ………………………………………………………..…….3
3. Smaller species (TL 3.27, HL 0.88, HW 0.88, PW 0.45). Scapes distinctly longer; when laid back from their insertions scapes reach the posterior margin of the head (SI 82) ( Fig. 1 View Fig. 1 E). Posterior margin of head nearly straight or shallowly concave ( Fig. 1 View Fig. 1 E). Cephalic dorsum between frontal carinae and in front of eyes longitudinally rugulose with posterior half slightly shining ( Fig. 1 View Fig. 1 E) (Algeria, Saudi Arabia, United Arab Emirates) ........................................... chobauti (Emery, 1897)
– Larger species (TL 4.06–4.50, HL 0.95–1.09, HW 1.00–1.15, PW 0.60–0.61). Scapes shorter; when laid back from their insertions scapes just reach level of posterior margin of eyes (SI 53–65) ( Fig. 1 View Fig. 1 F). Posterior margin of head shallowly but distinctly emarginated medially in full-face view ( Fig. 1 View Fig. 1 F). Cephalic dorsum distinctly finely and densely longitudinally costulate and completely dull ( Fig. 1 View Fig. 1 F) (Algeria, United Arab Emirates) .............................................................. lameerei ( Forel, 1902)
4. Propodeal spiracle vertically slit-shaped or elliptical ( Fig. 2A View Fig. 2 ). Anterior clypeal margin with a pair of well-developed strong teeth which overhang the mandibles, these teeth broadly separated by a distance greater than maximum width across frontal lobes ( Fig. 2 View Fig. 2 B) .............................................. 5
– Propodeal spiracle circular or subcircular ( Fig. 2 View Fig. 2 C). Anterior clypeal margin without teeth ( Fig. 2 View Fig. 2 D).6
5. Promesonotum in profile distinctly convex ( Fig. 2 View Fig. 2 E). Propodeal dorsum about twice as long as declivity in profile ( Fig. 2 View Fig. 2 E). Propodeum, petiole and postpetiole irregularly rugulose ( Fig. 2 View Fig. 2 F) (Benin, Burkina Faso, Eritrea, Ethiopia, Ghana, Nigeria, Sudan, Tanzania, United Arab Emirates) ..................................................................................................................... abyssinicus ( Forel, 1894)
– Promesonotum in profile flat ( Fig. 3A View Fig. 3 ). Propodeal dorsum as long as declivity in profile ( Fig. 3A View Fig. 3 ). Propodeum sides, petiole and postpetiole finely punctate-reticulate ( Fig. 3A View Fig. 3 ) (Armenia, Cyprus, Greece, Turkey, Jordan, Syria, United Arab Emirates) ...................... perplexus ( Radchenko, 1997)
6. Unicolorous yellow species. Propodeal dorsum densely punctulate-reticulate ( Fig. 3 View Fig. 3 B). Eyes conspicuously larger (EI 31–37) ( Fig. 3 View Fig. 3 C) (Saudi Arabia) ......................................... shakeri sp. nov.
– Unicolorous dark brown or reddish brown; or bicoloured species with at least gaster distinctly darker than rest of body. Propodeal dorsum finely transversely striolate or transversely rugulose ( Fig. 3 View Fig. 3 D). Eyes conspicuously smaller (EI 15–18) ............................................................................................ 7
7. Head and mesosoma yellow (India, Pantropical tramp species) ................ destructor ( Jerdon, 1851)
– Head and mesosoma brown or reddish brown .................................................................................. 8
8. Posterior margin of head transversely striolate in dorsal view ( Fig. 3 View Fig. 3 E). Promesonotum in profile nearly flat or weakly convex ( Fig. 3 View Fig. 3 F). Propodeal dorsum in profile making a continuous curve with propodeal declivity. Transverse sculpture of propodeal dorsum fine and dense. Pilosity of mesosoma, petiole, postpetiole and gaster short, and weakly curved (India, North Africa, Middle East, Afrotropical, Indomalayan and Oriental regions) ....................................... mayri ( Forel, 1902)
– Posterior margin of head transversely smooth in dorsal view ( Fig. 4 View Fig. 4 A). Promesonotum in profile strongly convex ( Fig. 4 View Fig. 4 B). Propodeal dorsum in profile making a weak but distinct obtuse angle with propodeal declivity ( Fig. 4 View Fig. 4 B). Transverse sculpture of propodeal dorsum coarse and broadly spaced. Pilosity of mesosoma, petiole, postpetiole and gaster longer, and strongly curved ( Fig. 4 View Fig. 4 C) (Somalia, Afrotropical and Malagasy regions) ............................................................... robustior ( Forel, 1892)
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