Uploaded 2009; last updated 24 March 2016
Nylanderia vividula, full face view of a worker (click image to enlarge).
|Nylanderia vividula, side view of a worker (click image to enlarge).
Photo courtesy of http://www.antweb.org/
Nylanderia sp. can be identified by having a waist with one distinct segment; acidopore at the apex of the gaster with a circular fringe of setae; 12-segmented antennae; triangular mandibles; 6-segmented maxillary palps; and head and body with dorsally erect, coarse setae.
Nylanderia vividula can be found in the southern United States nesting in disturbed, forested and urban environments. Nests are most often found in the soil and are frequently under rocks. In areas that are warm and humid for large parts of the year, reproductive can be found flying almost year round.
Queen: HL 0.79-0.84, HW 0.74-0.80, SL 0.80-0.84, EL 0.21-0.25, MeSL 1.29-1.41 (n=5) (MEM specimens). Color is brown to dark brown. Head is shining with a combination of short, appressed setae and coarse, erect setae; eyes situated more dorsally than laterally at the midpoint of the head and about 1/4 of the head length in size; three ocelli present; mandibles triangular in shape with six teeth; antennae twelve segmented; scape with more than five microchaetae and terminating beyond the occipital border of the head; head is roughly square in shape. Mesosoma is shinning with a mixture of shorter, appressed setae and coarse, erect setae, dorsal surface of allitrunk relatively flat and expanded because of the presence of wings with well defined pronotal and epinotal sutures; four wings or wing scars present. Waist is single segmented; petiolar node pointed in the lateral view and can be obscured by the anterior edge of the gaster. Gaster enlarged and covered with a mixture of shorter, appressed setae and longer, erect setae; acidopore present on last gastral segment identified by a ring of erect setae; can be a darker color than the body.
Males: HL 0.55-0.57, HW 0.45-0.49, SL 0.62-0.64, EL 0.19-0.22, MeSL 0.82-0.90 (n=5) (MEM specimens). Color is brown to darker brown. Head shining with a mixture of short, appressed setae and coarse, erect setae; eyes situated at the midpoint of the head and about 1/3 of the head length on size; three protruding ocelli present; mandibles lacking obvious dentition; antennae thirteen segmented; scape terminating beyond the occipital border of the head; third funicular segment distinctly curved. Mesosoma shinning with the presence of short, appressed setae and coarse, erect setae; enlarged with four wings present; dorsal surface of propodeum glabrous and smooth. Waist single segmented; petiolar node pointed in the lateral view and can be obscured by the anterior edge of the gaster. Gaster shining with many coarse, erect setae present; setaceous genitalia present at the apex.
Nylanderia vividula can be separated from other similar species in the area by the squarish head, lighter color and the presence of coarse long setae. The males of N. vividula are readily separated by the third funicular segment being distinctly curved.
Biology and Economic Importance
Nylanderia vividula is considered to be a nuisance pest and is not considered to be very economically important. Because of their willingness to nest in such a variety of places it is not uncommon to find them in buildings, especially in colder climates where it is too cold for them to survive outside. N. vividula is an active forager that is attracted to sugary food and will readily forage from any food they find lying about a house. They also have a tendency to outcompete other ants in their local area and therefore could cause a threat to local biodiversity.
Afrotropical Region: Macaronesia, United Arab Emirates (antwiki.org and antweb.org)
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