Taxonomy of the ant genus Nesomyrmex Wheeler (Formicidae, Myrmicinae) in the Afrotropical region, with a review of current species groups and description of a new species of the N. angulatus group from Mozambique Author Garcia, Francisco Hita B7ADF56F-935D-4BD8-ADB3-50E96F8BB463 Okinawa Institute of Science and Technology, Onna-son, Okinawa, Japan. & urn: lsid: zoobank. org: author: B 7 ADF 56 F- 935 D- 4 BD 8 - ADB 3 - 50 E 96 F 8 BB 463 & Corresponding author: fhitagarcia @ gmail. com fhitagarcia@gmail.com Author Mbanyana, Nokuthula 157A51ED-7C85-4CA3-84E4-B7BD1E2A7E8F Iziko South African Museum, Cape Town, South Africa. & Email: nmbanyana @ iziko. org. za & urn: lsid: zoobank. org: author: 157 A 51 ED- 7 C 85 - 4 CA 3 - 84 E 4 - B 7 BD 1 E 2 A 7 E 8 F nmbanyana@iziko.org.za Author Audisio, Tracy Lynn C821F482-744F-467A-A480-1E353001A51F Okinawa Institute of Science and Technology, Onna-son, Okinawa, Japan. & Email: tracy @ troglophile. com & urn: lsid: zoobank. org: author: C 821 F 482 - 744 F- 467 A-A 480 - 1 E 353001 A 51 F tracy@troglophile.com Author Alpert, Gary D. 5BD71BB5-1EDA-4E05-84E1-FE71EA366767 Museum of Comparative Zoology, Harvard University, Cambridge, Massachusetts, U. S. A. & Email: garydalpert @ gmail. com & urn: lsid: zoobank. org: author: 5 BD 71 BB 5 - 1 EDA- 4 E 05 - 84 E 1 - FE 71 EA 366767 garydalpert@gmail.com text European Journal of Taxonomy 2017 2017-01-06 258 1 31 journal article 22478 10.5852/ejt.2017.258 35792d9c-db1a-45f1-b983-f52105f8d004 2118-9773 3776244 Identification key to Afrotropical species of the N. angulatus species group (workers) Review of the Nesomyrmex angulatus species group The following key is partly based on Bolton (1982) and Mbanyana & Robertson (2008) . 1. In profile mesosomal dorsum forming a single, uninterrupted flat surface without any trace of metanotal groove; petiolar peduncle short ( Fig. 8A ) …………………………………………………2 – In profile mesosomal dorsum always with conspicuously impressed metanotal groove; petiolar peduncle long ( Fig. 8B ) ……………………………………………………………………………3 2. Body colour yellow to very light brown ( Fig. 9A ) …………………… N. angulatus ( Mayr, 1862 ) – Body colour very dark brown to black ( Fig. 9B ) ……………………… N. grisoni ( Forel, 1916 ) 3. First gastral tergite lacking standing hairs except for single transverse row on posterior end of tergite ( Fig. 10A ) ………………………………………………………… N. evelynae ( Forel, 1916 ) – First gastral tergite with standing hairs evenly distributed throughout ( Fig. 10B ) ………………4 4. Antennal scapes conspicuously longer (SI 95–98); in dorsal view sides of petiolar node straight to weakly rounded, not laterally denticulate ( Fig. 11A ); dorsum of propodeum without standing hairs ( Fig. 11B ) ………………………………………………………………………… N. inhaca sp. nov. – Antennal scapes conspicuously shorter (SI 67–77); in dorsal view petiolar node laterally denticulate ( Fig. 11C ); dorsum of propodeum with short standing hairs ( Fig. 11D ) ………………5 Fig. 8. Body in profile. A . Nesomyrmex angulatus ( Mayr, 1862 ) (CASENT0922010). B . N. stramineus ( Arnold, 1948 ) (CASENT0922011). Fig. 9. Body in profile. A . Nesomyrmex angulatus ( Mayr, 1862 ) (CASENT0922010). B . N. grisoni ( Forel, 1916 ) (CASENT0908994). Fig. 10. Body in profile. A . Nesomyrmex evelynae ( Forel, 1916 ) (CASENT0413068). B . N. denticulatus ( Mayr, 1901 ) (CASENT0908992). Fig. 11. Waist segments in dorsal view and mesosoma in profile. A–B . Nesomyrmex inhaca sp. nov. (CASENT0790016). C . N. denticulatus ( Mayr, 1901 ) (CASENT0914923). D . N. denticulatus ( Mayr, 1901 ) (CASENT0908992). Fig. 12. Head, mesosoma, and waist segments in profile. A . Nesomyrmex denticulatus ( Mayr, 1901 ) (CASENT0914923). B . N. innocens ( Forel, 1913 ) (CASENT0906195). Fig. 13. Mesosoma and waist segments in profile. A . Nesomyrmex innocens ( Forel, 1913 ) (CASENT0908995). B . N. stramineus ( Arnold, 1948 ) (CASENT0922011). 5. Eyes larger, with 10–12 ommatidia in longest row ( Fig. 12A ); subpetiolar process with a conspicuous tooth anteriorly, followed by a long cuticular flange running back to the postpetiolar junction ( Fig. 12A ) …………………………………………………… N. denticulatus ( Mayr, 1901 ) – Eyes smaller, with 7–9 ommatidia in longest row ( Fig. 12B ); subpetiolar process with or without a conspicuously developed tooth anteriorly, but without a long cuticular flange running back to the postpetiolar junction ( Fig. 12B ) ……………………………………………………………………6 6. Propodeal spines shorter and thicker, elongate-triangular and only weakly longer than their basal width; in profile petiolar node nodiform, appearing approximately as long as high ( Fig. 13A ) …………………………………………………………………………… N. innocens ( Forel, 1913 ) – Propodeal spines longer and thinner, several times longer than their basal width; in profile petiolar node high, rectangular nodiform, appearing around twice as high as long ( Fig. 13B ) ……………………………………………………………………… N. stramineus ( Arnold, 1948 )