Dorylus wilverthi

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Dorylus wilverthi
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Dorylinae
Genus: Dorylus
Species: D. wilverthi
Binomial name
Dorylus wilverthi
Emery, 1899

Dorylus wilverthi casent0172657 profile 1.jpg

Dorylus wilverthi casent0172657 dorsal 1.jpg

Specimen labels

Synonyms

A sub-Sarahan driver ant.

Evolutionary Relationships
Dorylus

Dorylus laevigatus





Dorylus conradti



Dorylus orientalis





Dorylus fimbriatus laevipodex




Dorylus fulvus




Dorylus spininodis





Dorylus mayri





Dorylus nigricans rubellus




Dorylus nigricans molestus




Dorylus nigricans terrificus



Dorylus wilverthi







Dorylus nigricans burmeisteri




Dorylus nigricans sjostedti




Dorylus nigricans arcens



Dorylus nigricans










Dorylus emeryi




Dorylus gerstaeckeri



Dorylus gribodoi







Dorylus kohli



Dorylus emeryi opacus





Dorylus braunsi




Dorylus affinis



Dorylus helvolus












Based on Kronauer et al., 2007. Note only selected Dorylus species are included, and undescribed species are excluded.

Identification

A member of the Dorylus nigricans-group.

Distribution

Distribution based on Regional Taxon Lists

Afrotropical Region: Cameroun, Central African Republic, Democratic Republic of Congo (type locality), Ivory Coast, Kenya, Uganda.


Distribution based on AntMaps

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Distribution based on AntWeb specimens

Check data from AntWeb

Biology

Dorylus wilverthi is a driver ant.

Butler et al. (2018) - Driver ant are a group of nomadic swarm-raiding army ants that are restricted to sub-Saharan Africa (Wilson, 1964; Gotwald, 1995). The group is comprised of approximately nine species (Kronauer et al., 2007; Scheoning, 2008) in the subgenus Anomma. Driver ants are top invertebrate predators with extremely large colonies that can contain more than 10 million workers (Gotwald, 1995). Unlike the queens of most other ants, army ant queens are permanently wingless. Instead of going on a mating flight, new queens mate within their natal nest with approximately 10–30 unrelated males that disperse on the wing. In driver ants, mating probably occurs within a 2- to 3-week period before the new queen assumes regnancy of her colony (Kronauer et al., 2004b; Kronauer & Boomsma, 2007), and the mother queen disperses on foot, taking a portion of the existing workers with her (Gotwald, 1995). Colonies of driver ants are monogynous, and queens are highly multiply mated.

In Kakamega Forest, Kenya this species co-occurs with Dorylus nigricans molestus (Garcia et al., 2009; Peters & Okalo, 2009; Kronauer et al., 2011; Peters et al., 2011). Dorylus wilverthi mainly inhabits intact rainforest habitat (Scheoning et al., 2006; Peters & Okalo, 2009; Peters et al., 2009).

Hybridization

Butler et al. (2018) found this ant and the co-occuring Dorylus nigricans molestus hybridize. Their study of the population genetics of naturally occurring colonies concluded: "hybridization is bidirectional and occurs at equal rates in both species. Hybrid workers make up only 1–2% of the population, and successful interspecific matings represent approximately 2% of all matings in both species. This shows that, although interspecific matings that give rise to worker offspring occur regularly, they are much rarer than intraspecific mating. Finally, we find no evidence of an association between hybridization and genetic caste determination in this population. This means that genetic caste determination is not a necessary outcome of hybridization in ants, even in species where queens mate with multiple males.

Life History Traits

  • Mean colony size: 20,000,000 (Raignier & van Boven, 1955; Beckers et al., 1989)
  • Foraging behaviour: group hunter (Raignier & van Boven, 1955; Beckers et al., 1989)

Castes

Nomenclature

The following information is derived from Barry Bolton's New General Catalogue, a catalogue of the world's ants.

  • wilverthi. Dorylus (Anomma) wilverthi Emery, 1899e: 459, fig. (w.) DEMOCRATIC REPUBLIC OF CONGO. Forel, 1909b: 51 (m.); Raignier & Boven, 1955: 86 (q.); Wheeler, G.C. 1943: 321 (l.). Senior synonym of nomadas: Raignier & Boven, 1955: 93; of nigritarsis: Boven, 1972: 144. See also: Wheeler, G.C. & Wheeler, J. 1984: 268; Raignier & Boven, 1955: 115. [This name frequently misspelled as wilwerthi, for example by Santschi, 1910c: 352.]
  • nigritarsis. Dorylus nigritarsis Strand, 1911: 118 (q.) CAMEROUN. Combination in D. (Anomma): Santschi, 1915c: 248. Junior synonym of nigricans: Wheeler, W.M. 1922a: 737; of wilverthi: Boven, 1972: 144.
  • nomadas. Dorylus (Anomma) nomadas Santschi, 1935a: 254, fig. 1 (q.) DEMOCRATIC REPUBLIC OF CONGO. Junior synonym of wilverthi: Raignier & Boven, 1955: 93.

Description

References