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Zasphinctus sarowiwai
| Zasphinctus sarowiwai | |
|---|---|
| |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Insecta |
| Order: | Hymenoptera |
| Family: | Formicidae |
| Subfamily: | Dorylinae |
| Genus: | Zasphinctus |
| Species: | Z. sarowiwai |
| Binomial name | |
| Zasphinctus sarowiwai Hita Garcia, 2017
| |
All samples are from rainforest habitats at elevations from 250 to 1510 m. Based on the available collection data, the species lives in soil and leaf litter.
Identification
Hita Garcia et al. (2017) - Zasphinctus sarowiwai differs in most diagnostic characters from the other two Afrotropical species. Most obviously, it can be separated from the other species by its much larger body size, the prominent median clypeal tooth, and the almost complete lack of surface sculpture. Despite its wide distribution range, there is very little observable variation. Most notably, the colour appears to be generally darker in the specimens from Uganda and Cameroon, which are uniformly very dark brown to black, while the specimens from West Africa tend to have a much lighter abdomen and often relatively bright legs. Furthermore, we observed some variation in the material from Uganda. In some specimens, the subpetiolar process of the petiolar sternum had a slightly weaker, but still distinct, fenestra compared to the material from other localities, and the ventral margin of the process had a posteroventral tooth-like projection. In addition, the anterodorsal margin of abdominal segment III was slightly more angulate in a few specimens while in several other specimens the metapleuron had some weak punctate sculpture. Overall, we consider this variation as geographic and very well within the intraspecific range of such a widespread species.
Keys including this Species
Distribution
Hita Garcia et al. (2017) - The new species has a comparatively wide distribution ranging from Ivory Coast to Uganda, even though it is not known from all countries in-between. However, this is likely based on a sampling artefact considering the rarity of Zasphinctus in general and the poor sampling in most African countries. Therefore, we expect future collections in all countries in-between.
Latitudinal Distribution Pattern
Latitudinal Range: 6.2158° to 0.56437°.
| North Temperate |
North Subtropical |
Tropical | South Subtropical |
South Temperate |
- Source: AntMaps
Distribution based on Regional Taxon Lists
Afrotropical Region: Cameroun, Democratic Republic of Congo, Ghana, Ivory Coast, Uganda.
Distribution based on AntMaps
Distribution based on AntWeb specimens
Check data from AntWeb
Countries Occupied
| Number of countries occupied by this species based on AntWiki Regional Taxon Lists. In general, fewer countries occupied indicates a narrower range, while more countries indicates a more widespread species. |
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Estimated Abundance
| Relative abundance based on number of AntMaps records per species (this species within the purple bar). Fewer records (to the left) indicates a less abundant/encountered species while more records (to the right) indicates more abundant/encountered species. |
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Biology
Castes
Zasphinctus.png)
X-ray micro-CT scan 3D model of Zasphinctus sarowiwai (worker) prepared by the Economo lab at OIST.
See on Sketchfab. See list of 3D images.
Zasphinctus X-ray micro-CT scan 3D model of Zasphinctus sarowiwai (worker) prepared by the Economo lab at OIST.
See on Sketchfab. See list of 3D images.
Zasphinctus X-ray micro-CT scan 3D model of Zasphinctus sarowiwai (worker) prepared by the Economo lab at OIST.
See on Sketchfab. See list of 3D images.
Nomenclature
The following information is derived from Barry Bolton's Online Catalogue of the Ants of the World.
- sarowiwai. Zasphinctus sarowiwai Hita Garcia, in Hita Garcia, Fischer, et al. 2017b: 59, figs. 3, 4B,E,H,K,N,Q, 5B,E,H,K,N,Q, 6B,E,H,K,N,Q, 9, 10, 13B, 14, 15, Videos 2, 4, 5 (w.) CAMEROON, DEMOCRATIC REPUBLIC OF CONGO, GHANA, IVORY COAST, UGANDA.
- Type-material: holotype worker, 3 paratype workers.
- Type-locality: holotype Cameroon: Centre Prov., Mbalmayo, 3.4597, 11.4714, ca 600 m., xi.1993, rainforest (N. Stork); paratypes with same data.
- Type-depository: BMNH.
- Distribution: Cameroon, Democratic Republic of Congo, Ghana, Ivory Coast, Uganda.
Unless otherwise noted the text for the remainder of this section is reported from the publication that includes the original description.
Description
Worker
Labrum: distal margin conspicuously cleft medially; median area from anterior cleft to proximal articulation very thin, dividing labrum into two lobes; each lobe bulging medially; lateroventrally with two conspicuous hook-like labral arms projecting parallel to remainder of labrum; row of ten to twelve setae (1 very long pair plus four/five shorter pairs) on basal third of exterior face; row of four to six setae (1 very long pair plus one/ two shorter pairs) on exterior face close to distal margin; labral tubercles absent.
Maxillae: maxillary palp three-segmented with second segment being greatly enlarged, third segment with very long seta, second with two long setae; deep and conspicuous diagonal, transverse stipital groove present dividing stipes into proximal external face and distal external face; articulation of labrum with maxillae of labro-stipital type via lateral extension/shoulder; proximal faces projecting beyond inner margin of stipites, thus almost completely concealing prementum; galea with well-developed galeal crown and maxillary brush, galeal comb apparently absent; lacinial comb not observable.
Labium: labial palp three-segmented with first segment being greatly enlarged, first and second segment with one long seta, third segment with three long setae; premental shield with several moderately long setae; shape of glossa not observable (structure collapsed); subglossal brush present and conspicuous with numerous long and thick setae; paraglossae absent.
Type Material
Holotype, pinned worker, Cameroon, Centre Province, Mbalmayo, 3.4597, 11.4714, ca. 600 m, rainforest, XI.1993 (N. Stork) (The Natural History Museum: CASENT0764654). Paratypes, three pinned workers with same data as holotype (BMNH: CASENT0764646; CASENT0764649; CASENT0764650).
Cybertypes, the cybertype dataset consists of all volumetric raw data in DICOM format, 3D PDFs and 3D rotation videos of scans of head, mesosoma, metasoma, and the full body of the physical holotype (BMNH: CASENT0764654) and/or one paratype (BMNH: CASENT0764650) in addition to montage photos illustrating head in full-face view, profile and dorsal views of the body of both specimens. The data is deposited at Dryad and can be freely accessed as virtual representation of both types (Hita Garcia et al. 2017c, http://dx.doi.org/10.5061/dryad.4s3v1). In addition to the cybertype data at Dryad, we also provide a freely accessible 3D surface model of the holotype at Sketchfab (https://sketchfab.com/models/3e5a54cb8ea94028a49f0722bd5eefe8).
Etymology
The name of the new species is a patronym in honour of the famous Nigerian writer, environmentalist, and human rights activist Kenule Beeson “Ken” Saro-Wiwa. By naming a species from threatened rainforest habitats after him, we want to acknowledge his environmental legacy and draw attention to the often-problematic conservation situation in most Afrotropical rainforests.
References
- Borowiec, M.L. 2019. Convergent evolution of the army ant syndrome and congruence in big-data phylogenetics. Systematic Biology 68, 642–656 (doi:10.1093/sysbio/syy088).
- Hita Garcia F, Fischer G, Liu C, Audisio TL, Economo EP (2017) Next-generation morphological character discovery and evaluation: an X-ray micro-CT enhanced revision of the ant genus Zasphinctus Wheeler (Hymenoptera, Formicidae, Dorylinae) in the Afrotropics. ZooKeys 693: 33–93. https://doi.org/10.3897/zookeys.693.13012
- Mizuno, R., Eguchi, K., Satria, R., Dang, A. V., Bui, V. T., Phung, L. T. H., Ito, F. 2023. Colony composition, phasic reproduction, caste dimorphism, and prey preferences of the oriental non-army doryline ant Yunodorylus eguchii (Borowiec, 2009) (Hymenoptera: Formicidae: Dorylinae). Insectes Sociaux 70(1), 105–117 (doi:10.1007/s00040-023-00898-4).
References based on Global Ant Biodiversity Informatics
- Hita Garcia F., G. Fischer, C. Liu, T. L. Audisio, and E. P. Economo. 2017. Next-generation morphological character discovery and evaluation: an X-ray micro-CT enhanced revision of the ant genus Zasphinctus Wheeler (Hymenoptera, Formicidae, Dorylinae) in the Afrotropics. ZooKeys 693: 33–93. https://doi.org/10.3897/zookeys.693.13012