Tetramorium susannae

Distribution
Known from Angola, Cameroon, Central African Republic, Democratic Republic of Congo, Gabon and Ghana.

This taxon was described from Ghana.

Nomenclature

 *  susannae. Tetramorium susannae Hita Garcia, Fischer & Peters, 2010b: 58, figs. 4B, 6B, 7B, 67-69 (w.) GHANA.

Worker
HL 0.489 - 0.556 (0.519); HW 0.456 - 0.528 (0.491); SL 0.300 - 0.372 (0.333); EL 0.106 - 0.139 (0.125); PW 0.333 - 0.433 (0.384); WL 0.533 - 0.633 (0.594); PSL 0.111 - 0.172 (0.143); PTL 0.067 - 0.089 (0.078); PTH 0.200 - 0.250 (0.226); PTW 0.206 - 0.261 (0.236); PPL 0.111 - 0.139 (0.127); PPH 0.189 - 0.244 (0.220); PPW 0.250 - 0.328 (0.296); CI 92 - 99 (95); SI 64 - 73 (68); OI 23 - 28 (25); PSLI 22 - 33 (28); PeNI 54 - 66 (61); LPeI 30 - 39 (34); DPeI 271 - 354 (304); PpNI 67 - 86 (77); LPpI 54 - 63 (58); DPpI 216 - 263 (232); PPI 117 - 135 (126) (42 measured).

Head longer than wide (CI 92 - 99). Anterior clypeal margin entire and convex. Frontal carinae strongly developed and sinuate, curving down ventrally shortly before posterior margin of head, sharply defining posterior and ventral margins of well-developed and broad antennal scrobe. Antennal scape short (SI 64 - 73). Eyes moderate to large (OI 23 - 28), with 7 to 9 ommatidia in longest row. Metanotal groove in profile never impressed. Propodeal spines usually long and spinose, sometimes medium sized and elongate-triangular to spinose (PSLI 22 - 33). Propodeal lobes moderate, triangular and acute. Petiolar node strongly squamiform, in dorsal view highly transverse and between 2.7 to 3.5 times wider than long (DPeI 271 - 354), in lateral view between 2.5 to 3.3 times higher than long (LPeI 30 - 39). Postpetiole strongly cuneiform with sharp dorsal margin, in dorsal view well transverse, between 2.1 to 2.6 times wider than long (DPpI 216 - 264), and distinctly wider than petiolar node (PPI 117 - 135); in profile around 1.6 to 1.8 times higher than long (LPpI 54 - 63). Mandibles unsculptured, smooth and shiny. Clypeus usually with 3 longitudinal rugae, median ruga always well developed, lateral rugae variable and sometimes reduced. Most of head unsculptured, median longitudinal ruga present between frontal carinae, rarely traces of short rugulae present anteriorly near posterior clypeal margin or posteriorly near posterior margin of head, antennal scrobe with median longitudinal ruga anteriorly usually ending before posterior eye level. Mesosoma generally unsculptured and shiny. Ground sculpturation on head and mesosoma a very conspicuous hexagonal striation, in material from Cameroon and Central African Republic often partly reduced. Both waist segments and gaster completely unsculptured, smooth and shiny. All dorsal body surfaces with simple, fine, long standing hairs. Fine pubescence on antennal scapes and tibiae generally appressed. Head, mesosoma, waist segments, and gaster very dark brown to black, appendage coloration variable: appendages uniformly whitish to yellowish in material from Angola, D.R. Congo, Gabon, and Ghana, specimens from Cameroon and Central African Republic with whitish tibiae strongly contrasting with remaining leg segments, mandibles and antennae.