Tetramorium duncani Mbanyana, Robertson & Hita Garcia, 2018

Mbanyana, Nokuthula, Garcia, Francisco Hita, Robertson, Hamish Gibson & Roux, Johannes Jacobus Le, 2018, A taxonomic revision of seed harvester ants of the Tetramorium solidum group (Hymenoptera: Formicidae) in southern Africa, European Journal of Taxonomy 454, pp. 1-59 : 21-23

publication ID

https://doi.org/10.5852/ejt.2018.454

publication LSID

lsid:zoobank.org:pub:07F6B28D-ECA4-4F14-8132-0A58DE156057

DOI

https://doi.org/10.5281/zenodo.3818732

persistent identifier

https://treatment.plazi.org/id/6F687F00-D1C3-4DB9-8B3D-A588A1ED5A8F

taxon LSID

lsid:zoobank.org:act:6F687F00-D1C3-4DB9-8B3D-A588A1ED5A8F

treatment provided by

Valdenar

scientific name

Tetramorium duncani Mbanyana, Robertson & Hita Garcia
status

sp. nov.

Tetramorium duncani Mbanyana, Robertson & Hita Garcia sp. nov.

urn:lsid:zoobank.org:act:6F687F00-D1C3-4DB9-8B3D-A588A1ED5A8F

Figs 3N View Fig , 10 View Fig , 24 View Fig

Diagnosis

Morphologically, T. duncani sp. nov. is similar to T. pogonion , T. rufescens and T. signatum , but can be distinguished from these species by the acute angle between the dorsum of the petiole and the posterior face when viewed laterally ( Fig. 3N View Fig ).

Etymology

Named after Duncan Robertson, who assisted with field work, including photography of ants.

Material examined

Holotype

NAMIBIA: worker, Withuis , 11 km N of Grunau on B1, 27°36.447′ S, 18°23.920′ E, 1243 m a.s.l., 3 Apr. 2011, N. Mbanyana and H.G. Robertson leg. (SAM-HYM-C027003).

GoogleMaps

Paratypes (9 pinned workers)

NAMIBIA: Withuis , 11 km N of Grunau on B1, 27°36.447′ S and 18°23.920′ E, 1243 m a.s.l., 3 Apr. 2011, N. Mbanyana and H.G. Robertson leg. ( SAM-HYM-C027003 ); Withuis, 11 km N of Grunau on B1, 27°36.504′ S and 18°23.823′ E, 1241 m a.s.l., 2 Apr. 2011, N. Mbanyana and H.G. Robertson leg. ( SAM-HYM-C027004 ); GoogleMaps Withuis, 11 km N of Grunau on B1, 27°36.447′ S and 18°23.920′ E, 1243 m a.s.l., 3 Apr. 2011, N. Mbanyana and H.G. Robertson leg. (SAM-HYM-C027010); GoogleMaps Kyffhauser, 24°28.708′ S and 16°20.148′ E, 1381 m a.s.l., 6 Apr. 2011, N. Mbanyana and H.G. Robertson leg. (SAM-HYM-C027013); GoogleMaps ca 132 km from Mariental on M29, 25°16.795′ S, 18°37.635′ E, 18 Apr. 2011, N. Mbanyana and H.G. Robertson leg. (SAM-HYM-C027001). GoogleMaps

GoogleMaps

Other material

SOUTH AFRICA (2 pinned specimens): Northern Cape: Breekkierie dunes, 30°07′ S, 21°33′ E, 4 May 1985, M.A. Macpherson leg. (SAM-HYM-C001771); GoogleMaps Kortkop farm near Strydenburg , 30°09′ S, 23°44′ E, 17 Jun. 1995, B. Chambers leg. (SAM-HYM-C008763). GoogleMaps

Measurements (worker N =5)

HL 1.033 –1.266 (1.132); HW 1.033 –1.266 (1.116); SL 0.723 –0.865 (0.798); EL 0.297 –0.362 (0.320); PH 0.374 –0.482 (0.452); PW 0.672 –0.840 (0.716); WL 1.072 –1.382 (1.168); PSL 0.148 –0.187 (0.163); PTH 0.325 –0.433 (0.358); PTL 0.297 –0.336 (0.318); PTW 0.323 –0.413 (0.364); PPH 0.465 –0.607 (0.519); PPL 0.284 –0.336 (0.310); PPW 0.413 –0.555 (0.475); OI 27–31 (29); CI 97–100 (99); SI 68–75 (71); DMI 59–63 (61); LMI 35–44 (39); PSLI 12–17 (15); PeNI 48–54 (51); LPeI 78–96 (89); DPeI 104–123 (115); PpNI 62–69 (66); LPpI 54–68 (60); DPpI 139–168 (153); PPI 128–134 (130).

Description

Holotype (worker)

Mandibles with fine longitudinal striations. Anterior clypeal margin with conspicuous, semicircular indentation. Frontal carinae fading out before reaching back of posterior eye margin. Eyes with 16 ommatidia in longest row. Propodeum armed with pair of long spines (PSLI 12–17). Metapleural lobes low, rounded. Peduncle lacking subpetiolar process. Petiolar node in profile nodiform, with anterior face rounding onto dorsum and dorsum forming acute angle with posterior face. Postpetiolar node low and rounded. Dorsal surfaces of head with longitudinal striations, spaces between them with superficial ground sculpture. Dorsum of mesosoma with short longitudinal striations, with shiny superficial ground sculpture in between them. Petiolar and postpetiolar nodes with fine reticulate sculpture overlain by few irregular striations. Gastral tergite with fine, superficial reticulate pattern. Dorsum of head with four long erect pairs of hairs. Ventral surface of head with strongly developed psammophore. Remaining dorsum of the body without any standing hairs. Colour blackish brown.

Distribution

Known from Namibia and South Africa (Northern Cape), where these specimens were collected from Namibian Savanna Woodlands and Kalahari Xeric Savanna. Specimens collected by hand (including in nets) and from pitfall traps.

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Hymenoptera

Family

Formicidae

Genus

Tetramorium