Tetramorium brigitteae Mbanyana, Robertson & Hita Garcia

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: 13-16

publication ID

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

publication LSID

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

DOI

http://doi.org/10.5281/zenodo.3818728

persistent identifier

http://treatment.plazi.org/id/CC0CCBD7-3D23-4177-A1B8-36AC5B02A7DF

taxon LSID

lsid:zoobank.org:act:CC0CCBD7-3D23-4177-A1B8-36AC5B02A7DF

treatment provided by

Valdenar

scientific name

Tetramorium brigitteae Mbanyana, Robertson & Hita Garcia
status

sp. nov.

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

urn:lsid:zoobank.org:act:CC0CCBD7-3D23-4177-A1B8-36AC5B02A7DF

Figs 4J View Fig , 7 View Fig , 24 View Fig

Diagnosis

Tetramorium brigitteae   sp. nov. is morphologically similar to T. peringueyi   , T. dichroum   and T. margueriteae   sp. nov. These are the only species in the solidum   group with abundant erect simple hairs covering the entire body. Tetramorium brigitteae   sp. nov can be easily separated from T. peringueyi   by the following characters: in T. brigitteae   sp. nov., dorsum of mesosoma with longitudinal striations and superficial ground sculpture in between ( Fig. 7B View Fig ), whereas in T. peringueyi   , the dorsal surface of the mesosoma with strongly developed irregular reticulate sculpture( Fig.4E View Fig );propodeum armed with a pair of short propodeal teeth(PSLI6)in T. brigitteae   sp.nov.,whereas in T.peringueyi   the propodeum is armed with elongate spines (PSLI 22).Antennae with sub-erect pubescence in T. brigitteae   sp. nov., with erect hairs in T. peringueyi   . Tetramorium brigittae   sp. nov. can also be easily separated from T. margueriteae   sp. nov. on the basis of colour and spine length, and also by the fact that T. margueriteae   sp. nov. has erect hairs on the antennae, whereas T. brigitteae   sp. nov. has sub-erect pubescence on the antennae. Tetramorium brigitteae   sp. nov. and T. dichroum   both have sub-erect hairs on the antennae, and in both species the dorsum of the mesosoma has longitudinal striations and a superficial ground sculpture in between. These two species can be separated on the basis of spine length and colour. In T. brigitteae   sp. nov., propodeum armed with short propodeal teeth (PSLI 6) ( Fig. 4J View Fig ), whereas in T. dichroum   propodeum armed with acute spines (PSLI 14) ( Fig. 4I View Fig ). Tetramorium brigitteae   sp. nov. is reddish brown, with gaster black, whereas T. dichroum   is light brown in colour, with gaster a little darker compared to the mesosoma. The lateral sides of the mesosoma have strong reticulate-punctate sculpture in T. brigitteae   sp. nov., whereas in T. dichroum   the sides of the mesosoma have lateral striations with a superficial reticulate sculpture in between.

Etymology

Named after Dr Brigitte Braschler who collected the holotype and who has made a significant contribution to our knowledge of southern African arid ants through field work conducted as part of the DST/NRF Centre of Excellence for Invasion Biology’s Imbovane project.

Material examined

Holotype

SOUTH AFRICA: Northern Cape: worker, near Augrabies Falls National Park, on R359 past turnoff for Augrabies National Park , 28.623° S, 20.328° E, 639 m a.s.l., 13 Dec. 2011, Brigitte Braschler ( SAM- HYM-C027040).

GoogleMaps  

Measurements (worker N =1)

HL 0.982; HW 1.059; SL 0.736; EL 0.284; PH 0.374; PW 0.672; WL 1.098; PSL 0.054; PTH 0.364; PTL 0.349; PTW 0.375; PPH 0.452; PPL 0.362; PPW 0.426; OI 27; CI 108; SI 70; DMI 61; LMI 34; PSLI 6; PeNI 56; LPeI 96; DPeI 107; PpNI 63; LPpI 80; DPpI 118; PPI 114.

Description

Holotype (worker)

Mandibles with fine longitudinal striations.Anterior clypeal margin with extensive and deep indentation. Frontal carinae extending back to posterior margins of eyes. Eyes with 16 ommatidia in longest row. Propodeum armed with pair of short propodeal teeth (PSLI 6), teeth longer than basal width. Metapleural lobes low and rounded. Peduncle with prominent keel-shaped subpetiolar process. Petiolar node in profile nodiform, with posterior face slightly more steeply angled than anterior face; anterior face rounding into dorsum but with slightly angled corners as seen in dorsal view. Postpetiolar node low and rounded. Peduncle lacking subpetiolar process. Dorsal surfaces of head and mesosoma with longitudinal striations, spaces between them with superficial ground sculpture. Petiolar and postpetiolar nodes with fine reticulate sculpture overlain by few irregular transverse striations. Gastral tergite with longitudinal short striations basally and remaining part with fine reticulate pattern. All dorsal surfaces of body with abundant, short to moderately long, erect pilosity. Antennae with sub-erect pubescence. Tibia of middle and hind legs with numerous short, stout, erect hairs. Ventral surface of head with strongly developed psammophore. Head and mesosoma light brown in colour and gaster black.

Distribution

Known from one specimen which was collected from the Nama Karoo region in the Northern Cape in South Africa.