Tetramorium solidum, Emery, 1886

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 : 6-10

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.3818724

persistent identifier

https://treatment.plazi.org/id/039887DC-FF95-A47D-2990-A5C8FA8BA6FC

treatment provided by

Valdenar

scientific name

Tetramorium solidum
status

 

Identification key to species in the Tetramorium solidum group (workers)

1. Body with branched pilosity ( Fig. 2C View Fig ) ................................................... T. rothschildi ( Forel, 1907) – Body either lacking pilosity or with simple pilosity ( Fig. 2 View Fig A–B, D–I)..........................................2

2. Dorsum of mesosoma in profile without any erect hairs, with appressed pubescence only ( Fig. 2 View Fig D–H)........................................................................................................................................3 – Dorsum of mesosoma in profile with erect hairs ( Fig. 2 View Fig A–B, I).............................................14

3. Body with short, broad, blunt, much flattened and strongly appressed glittering silvery hairs ( Fig. 2 View Fig D–F)....................................................................................................................................4 – Body without such hairs, only with sparse simple appressed pubescence ( Fig. 2 View Fig G–H)...............6

4. Appressed pubescence long, dense and strap-like, hairs often overhanging one another ( Fig. 2E View Fig ) ............................................................................................................ T. galoasanum Santschi, 1910 – Appressed pubescence sparse and spaced out, not strap-like and not overlapping ( Fig. 2 View Fig D–E)...5

5. The base of the first gastral tergite in profile forming a thick, laterally projecting downcurved flange, which obscures the tergosternal suture basally and base of the sternite; reddishbrown or red species ( Fig. 3A View Fig ) ........................................................ T. setuliferum Emery, 1895

– The base of the first gasteral tergite in profile not projecting as above, the tergosternal suture and base of the sternite clearly visible; blackish brown to black species ( Fig. 3B View Fig ) ....................... ......................................................................................................................... T. clunum Forel, 1913

6. In dorsal view both waist segments much broader than long and transverse, especially postpetiole extremely broadened with very well developed alar extensions making it approximately as broad as pronotum ( Fig. 3C View Fig ) ............................................................ T. grandinode Santschi, 1913

– Waist segments, especially the postpetiole never shaped as above; if postpetiole with small alar extensions, then petiole not broadened ( Fig. 3 View Fig D–F)........................................................................7

7. Propodeum unarmed, lacking propodeal spines ( Fig. 3G View Fig ) .................. T. jordani Santschi, 1937 – Propodeum armed with a pair of spines ( Fig. 3 View Fig H–I).................................................................8

8. Petiole in dorsal view broadened with lateral extensions on the sides ( Fig. 3D View Fig ) ............................ ................................................................. T. lerouxi Mbanyana, Robertson & Hita Garcia sp. nov. – Petiole in dorsal view without any lateral extensions as above ( Fig. 3 View Fig E–F)....................................9

9. In full-face view head narrower in front of eyes than behind eyes ( Fig. 3J View Fig ) ...................................... ................................................................................................................ T. barbigerum Bolton, 1980 – In full-face view head broader in front of eyes than behind the eyes, or same width ( Fig. 3 View Fig K–M)...10

10. In profile posterodorsal corner of petiolar node sharply angled and slightly projecting posteriorly ( Fig. 3N View Fig ) ................................................ T. duncani Mbanyana, Robertson & Hita Garcia sp. nov.

– In profile posterodorsal corner of petiolar node rounded or rectangular but not sharply angled as above ( Fig. 3 View Fig O–P)............................................................................................................................11

11. Head broader in front of eyes than behind eyes ( Fig. 3K View Fig ) ............... T. pogonion Bolton, 1980 – Head same width in front of eyes as behind eyes ( Fig. 3 View Fig L–M).............................................12

12. Dorsum of mesosoma completely longitudinally or irregularly rugulose/rugose ( Fig. 4A View Fig ) ........... .................................................................................................................... T. signatum Emery, 1895

– Dorsum of mesosoma either predominantly shiny with only superficial punctate sculpture, or densely reticulate punctate, often with few faint longitudinal costulae, median area of mesosoma usually very weakly sculptured ( Fig. 4B View Fig )..................................................................13

13. Propodeal spines short, broad and acute apically (PSLI 4–8) ( Fig. 3H View Fig ) ... T. glabratum Stitz, 1923 – Propodeal spines long and narrow (PSLI 16–23) ( Fig. 3I View Fig ) ........................ T. rufescens Stitz, 1923

14. Abundant erect hairs on all dorsal surfaces of head and body ( Fig. 2 View Fig D–E)........................15 – Only one to four pairs of hairs present on dorsum of mesosoma ( Fig. 2L View Fig ).................................18

15. Antennal scapes with erect hairs ( Fig. 4C View Fig )...................................................................................16 – Antennal scapes without erect hairs, only with flattened pubescence ( Fig. 4D View Fig )........................17

16. Dorsal surface of mesosoma with strongly developed irregular reticulate sculpture; colour orange ( Fig. 4E, G View Fig ) ................................................................................................ T. peringueyi Arnold, 1926

– Dorsal surface of mesosoma with short longitudinal rugulae; ground sculpture mainly smooth and shiny with peripheral patches of fine, superficial reticulations; colour uniformly black ( Fig. 4F, H View Fig ) ............................... T. margueriteae Mbanyana, Robertson & Hita Garcia sp. nov.

17. Propodeum armed with acute spines (PSLI 10–16); colour light brown, with gaster a little bit darker compared to mesosoma ( Fig. 4I View Fig ) .................................................. T. dichroum Santschi, 1932

– Propodeum with short propodeal teeth (PSLI 6); colour reddish brown, with gaster black ( Fig. 4J View Fig ) ........................................... T. brigitteae Mbanyana, Robertson & Hita Garcia sp. nov.

18. Propodeum with elongate and acute spines (PSLI 17–21) ( Fig. 4K View Fig ) .... T. solidum Emery, 1886 – Propodeum with short triangular teeth (PSLI 5–9) ( Fig. 4L View Fig ) .......................................................... .................................................................... T. aisha Mbanyana, Robertson & Hita Garcia sp. nov.

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Hymenoptera

Family

Formicidae

Genus

Tetramorium