Plectroctena
{{Short description|Genus of ants}}
{{Automatic taxobox
| image = Plectroctena sp ants.jpg
| image_caption = Two workers in Tanzania
| display_parents = 2
| taxon = Plectroctena
| authority = F.Smith, 1858
| type_species = Plectroctena mandibularis
| type_species_authority = F.Smith, 1858
| diversity_link = #Species
| diversity = 17 species
| diversity_ref = {{AntCat|430123|Plectroctena|2014|accessdate=4 July 2014}}
| synonyms = Cacopone Santschi, 1914
}}
image:Plectroctena mandibularis, werker, Tweeling, c.jpg
Plectroctena is an Afrotropical genus of ants, with most species occurring in the rainforest zones of West and Central Africa.{{cite journal | last1=Bolton | first1=B. | last2=Gotwald | first2=W. H. | last3=Leroux | first3=J-M | title=A new West African ant of the genus Plectroctena with ecological notes (Hymenoptera: Formicidae) | journal=Annales de l'Université d'Abidjan, Série E (Écologie) | year=1976 | url=http://gap.entclub.org/taxonomists/Bolton/Plectroctena.pdf | archive-url=https://web.archive.org/web/20110912145439/http://gap.entclub.org/taxonomists/Bolton/Plectroctena.pdf | url-status=dead | archive-date=12 September 2011 | access-date=5 September 2013 }} Some species are cryptic or subterranean foragers, while others forage in open grassland terrain. The workers forage singly{{cite journal|last=Arnold |first=G. |title=A monograph of the Formicidae in South Africa. Part I. |journal=Annals of the South African Museum |year=1915 |volume=14 |pages=1–159}} or in groups of 2 to 3.{{cite journal|last=Bolton |first=B. |title=A revision of the Ponerine ant genus Plectroctena F. Smith (Hymenoptera: Formicidae) |journal=Bulletin of the British Museum |year=1974 |volume=30 |pages=309–338}} They nest in the earth at varying depths, or in collapsed logs. They prey mainly on millipedes, including their young or eggs.
Colony structure
A colony of P. lygaria (a small species of the mandibularis-group) may number in excess of 300 adults. An excavated colony in the Ivory Coast consisted of 277 workers, 8 alate queens, and 42 alate males. Consequently 15% of their number was allocated to reproductives at the specific time. The colony size of P. mandibularis however, seldom exceeds 50 individuals.
Nests
In a colony of P. lygaria, the nest chambers are located at shallow depth, in moist soil under dense leaf litter. The deepest chamber may be located about 7 cm below the surface, with each chamber up to 1 cm in height. The chambers are specialized to house either brood or prey items. Nests of the widespread species P. mandibularis however, are composed of chambers typically located 2 feet or more below the surface, with entrances that are usually marked by large piles of earth.
Diet
Species
{{div col|colwidth=30em}}
- Plectroctena anops Bolton, 1974
- Plectroctena conjugata Santschi, 1914
- Plectroctena cristata Emery, 1899
- Plectroctena cryptica Bolton, 1974
- Plectroctena dentata Santschi, 1912
- Plectroctena gabonensis Santschi, 1919
- Plectroctena gestroi Menozzi, 1922
- Plectroctena hastifera (Santschi, 1914)
- Plectroctena laevior Stitz, 1924
- Plectroctena latinodis Santschi, 1924
- Plectroctena lygaria Bolton, Gotwald & Leroux, 1979
- Plectroctena macgeei Bolton, 1974
- Plectroctena mandibularis F.Smith, 1858
- Plectroctena minor Emery, 1892
- Plectroctena strigosa Emery, 1899
- Plectroctena subterranea Arnold, 1915
- Plectroctena thaui Fisher, 2006
- Plectroctena ugandensis Menozzi, 1933
{{div col end}}
References
{{Reflist}}
External links
- {{Commons category-inline|Plectroctena|Plectroctena}}
- [http://www.antweb.org/description.do?name=plectroctena&rank=genus Genus: Plectroctena, AntWeb]
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