Tetraponera sahlbergii (Forel)

Ward, Philip S., 2022, The ant genus Tetraponera (Hymenoptera: Formicidae) in the Afrotropical region: taxonomic review and key to species, Zootaxa 5102 (1), pp. 1-70 : 42-43

publication ID

https://doi.org/10.11646/zootaxa.5102.1.1

publication LSID

lsid:zoobank.org:pub:BEA963B7-F7B9-458A-92EE-A4740AC390AC

DOI

https://doi.org/10.5281/zenodo.6822776

persistent identifier

https://treatment.plazi.org/id/03A33567-FF94-5417-1CD0-85B6FE923B2A

treatment provided by

Plazi

scientific name

Tetraponera sahlbergii (Forel)
status

 

Tetraponera sahlbergii (Forel)

( Fig. 21 View FIGURES 19–21 )

Sima Sahlbergii Forel 1887: 386 View Cited Treatment . Holotype worker (by monotypy), Bois d’Ivondro pr. Tamatave, Madagascar (C. Keller) (MHNG) [examined]. Imaged on AntWeb : CASENT0101052.

Sima sahlbergi r. spuria Forel 1897: 199 View Cited Treatment . Syntypes, 18 workers, 1 male, Nosy Be [as “Nosibé” and “Nossibé”], Madagascar (Völtzkow) ( MSNG, MHNG, NMHV) [examined] . 6 syntype workers, 1 syntype male from MHNG imaged on AntWeb: CASENT0101055, CASENT0101056, CASENT0101057, CASENT0101058, CASENT0101059, CASENT0101060, CASENT0101063 . 1 syntype worker from MSNG imaged on AntWeb: CASENT0102036. Syn. nov .

Sima (Tetraponera) plicatidens Santschi 1926: 26 View Cited Treatment . Syntypes, 2 alate queens, 2 males, Ankaratra , 2000m, Madagascar (Descarpentries) ( NHMB) [examined] . 1 syntype queen, 2 syntype males imaged on AntWeb : CASENT0101149, CASENT0101150, CASENT0101151. Syn. nov .

Sima Sahlbergi Forel ; Forel 1892: 260. Description of queen.

Sima (Tetraponera) sahlbergi Forel ; Emery 1921: 28. Combination in Sima (Tetraponera) .

Tetraponera sahlbergi (Forel) ; Wheeler 1922c: 1015. Combination in Tetraponera .

Tetraponera sahlbergii (Forel) ; Chomicki et al. 2015: figure S1. Placement in molecular phylogeny.

Sima (Tetraponera) sahlbergi subsp. spuria Forel ; Emery 1921: 28. Combination in Sima (Tetraponera) .

Tetraponera sahlbergi subsp. spuria (Forel) ; Wheeler 1922c: 1016. Combination in Tetraponera .

Tetraponera plicatidens (Santschi) ; Ward 1990: 489. Combination in Tetraponera .

Worker measurements (n = 17). HW 0.49–0.77, HL 0.69–1.01, LHT 0.48–0.70, CI 0.69–0.76, FCI 0.08–0.14, REL 0.29–0.34, REL2 0.38–0.47, SI 0.55–0.65, SI3 1.31–1.56, FI 0.40–0.45, PLI 0.46–0.62, PWI 0.34–0.52, LHT/ HW 0.84–1.02, CSC 2–3, MSC 2–6.

Worker diagnosis. Relatively small species, with somewhat elongate head (CI 0.69–0.76), and eyes of moderate size (see ocular indices); minimum distance between frontal carinae only slightly exceeding basal scape width (FCI 0.08–0.14); scape moderately long, greater than one-half head width and less than one-half head length (SI 0.55–0.65, SI2 0.41–0.45); median clypeal lobe broadly convex, denticulate, furnished with a small median tooth and flanked by one or two pairs of weak lateral teeth, sometimes reduced to crenulations ( Fig. 21a View FIGURES 19–21 ); profemur moderately robust (FI 0.40–0.45); mesosoma with a differentiated, transverse metanotal plate, about one third the length of the mesonotum; dorsal face of propodeum flat to weakly convex (posterior view), about as long as declivitous face and rounding into the latter; petiole slender (PLI 0.46–0.62, PWI 0.34–0.52), with a well differentiated anterior peduncle, the node with relatively shallow and similar anterodorsal and posterodorsal faces, as seen in profile ( Fig. 21b View FIGURES 19–21 ); postpetiole longer than broad. Head and mesosoma sublucid, with fine reticulate-coriarious sculpture and scattered small punctures. Standing pilosity relatively sparse; head usually with 1 pair of supraocular setae (CSC 2–3); mesosoma with 1–2 pairs of standing hairs on the pronotum and 0–1 pair on the mesonotum (MSC 2–6); standing pilosity absent from dorsal face of propodeum. Dark brownish-black, antennae, mandibles and distal portions of legs lighter.

Comments. This is a widespread and somewhat variable species, recognizable in the worker caste by the combination of (1) relatively small size, (2) a moderately elongate head (CI 0.69–0.76), (3) a broadly convex anterior clypeal margin, that is crenulate or denticulate but lacks prominent teeth, (4) a slender petiole, and (5) sparse standing pilosity. In western populations the sheen of the integument is somewhat dulled by the fine reticulate-coriarious sculpture, compared to similar congeners. T. sahlbergii workers from mesic localities in eastern Madagascar tend to have a shinier head and more robust petiole than those from drier habitats on the western half of the island, but intermediate phenotypes occur, and the variation is here treated as intraspecific.

Distribution and biology. This is a common species that occurs in spiny forest, tropical dry forest and disturbed open habitats almost throughout the island of Madagascar. It is a generalist inhabitant of dead twigs or stems of woody plants.

MSNG

Museo Civico di Storia Naturale di Genova 'Giacomo Doria'

MHNG

Museum d'Histoire Naturelle

NHMB

Natural History Museum Bucharest

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Hymenoptera

Family

Formicidae

Genus

Tetraponera

Loc

Tetraponera sahlbergii (Forel)

Ward, Philip S. 2022
2022
Loc

Tetraponera plicatidens (Santschi)

Ward, P. S. 1990: 489
1990
Loc

Sima (Tetraponera) plicatidens

Santschi, F. 1926: 26
1926
Loc

Tetraponera sahlbergi (Forel)

Wheeler, W. M. 1922: 1015
1922
Loc

Tetraponera sahlbergi subsp. spuria (Forel)

Wheeler, W. M. 1922: 1016
1922
Loc

Sima (Tetraponera) sahlbergi

Emery, C. 1921: 28
1921
Loc

Sima (Tetraponera) sahlbergi subsp. spuria

Emery, C. 1921: 28
1921
Loc

Sima sahlbergi r. spuria

Forel, A. 1897: 199
1897
Loc

Sima Sahlbergi Forel

Forel, A. 1892: 260
1892
Loc

Sima Sahlbergii

Forel, A. 1887: 386
1887