A taxonomic revision of seed harvester ants of the Tetramorium solidum group (Hymenoptera: Formicidae) in southern Africa Author Mbanyana, Nokuthula 157A51ED-7C85-4CA3-84E4-B7BD1E2A7E8F Iziko Museums of South Africa, P. O. Box 61, Cape Town, 8000 South Africa. Okinawa Institute of Science and Technology Graduate University, 1919 - 1 Tancha, Onna-son, Okinawa, Japan. Department of Botany and Zoology, Stellenbosch University, Private Bag X 1, Matieland, 7602, South Africa. nmbanyana@iziko.org.za Author Garcia, Francisco Hita B7ADF56F-935D-4BD8-ADB3-50E96F8BB463 fhitagarcia@gmail.com Author Robertson, Hamish Gibson 972FAB6C-C5FA-45EA-9A17-9F156845BE4F Iziko Museums of South Africa, P. O. Box 61, Cape Town, 8000 South Africa. Okinawa Institute of Science and Technology Graduate University, 1919 - 1 Tancha, Onna-son, Okinawa, Japan. Department of Botany and Zoology, Stellenbosch University, Private Bag X 1, Matieland, 7602, South Africa. hrobertson@iziko.org.za Author Roux, Johannes Jacobus Le 2995D443-01FA-4F65-BFEE-ECA07B73504A jleroux@sun.ac.za text European Journal of Taxonomy 2018 2018-08-07 454 1 59 journal article 22298 10.5852/ejt.2018.454 654c9653-fbef-4d0d-9e07-619084ac1162 3817358 07F6B28D-ECA4-4F14-8132-0A58DE156057 Tetramorium barbigerum Bolton , 1980 Figs 3J , 6 Tetramorium barbigerum Bolton , 1980: 243 . Diagnosis Tetramorium barbigerum is easily distinguished from all species of the T . solidum group by its head shape, which is narrower in front of the eyes than behind ( Fig. 3J ). Morphologically, this species is similar to T . jordani and T . signatum in that they are all black in colour and lack erect hairs on the mesosoma, but the sculpture in T . signatum is much stronger developed compared to T . jordani and T. barbigerum . Tetramorium barbigerum and T . jordani have a feeble cephalic sculpture, fading out at the level of the eyes and replaced by a fine superficial punctation ( Figs 6C , 14C ). These two species can be easily distinguished from each other by the lack of propodeal spines/teeth in T . jordani (PSLI 1–2) ( Fig. 3G ) and the presence thereof in T. barbigerum (PSLI 7–8) ( Fig. 6A ). Material examined Holotype NAMIBIA : worker , 10 mi. ( 16 km ) W of Okombahe , 920 m a.s.l. , 10 May 1958 , R.E. Ross and R.E. Leech leg. ( CASC : CASTYPE13386 ). Paratypes NAMIBIA : 17 pinned workers , same data as holotype ( CASC : CASENT0270787 to CASENT0270792 ); 3 pinned workers , same data as holotype ( BMNH ). Measurements (workers N = 6) HL 1.214 –1.266 (1.244); HW 1.201 –1.240 (1.223) SL 0.827 –0.891 (0.857); EL 0.297 –0.323 (0.308); PH 0.570 –0.590 (0.583); PW 0.747 –0.806 (0.775); WL 1.227 –1.356 (1.294); PSL 0.089 –0.098 (0.093); PTH 0.354 –0.374 (0.363); PTL 0.354 –0.384 (0.370); PTW 0.364 –0.384 (0.375); PPH 0.517 –0.568 (0.536); PPL 0.295 –0.403 (0.362); PPW 0.443 –0.472 (0.462); OI 24–26 (25); CI 95–101 (98); SI 67–72 (70); DMI 56–62 (60); LMI 42–49 (45); PSLI 7–8 (8); PeNI 46–50 (48); LPeI 95–108 (102) DPeI 108–132 (101); PpNI 58–62 (60); LPpI 57–76 (68); DPpI 117–153 (129); PPI 118–127 (123). Distribution Only known from the type locality, Okombahe in Namibia .