Species: Nylanderia guatemalensis (Forel, 1885)
Usage: valid
Worker caste monomorphic. Antenna 12-segmented. Antennal club indistinct. Antennal scape length less than 1.5x head length. Antennal scapes with more than 10 erect hairs. Eyes medium to large (greater than 6 facets); do not break outline of head. Posteromedian portion of head densely covered in pubescence, such that the space between hairs is often less than the length of the hairs. Dorsum of mesosoma with weakly impressed metanotal groove, but never with a deep and broad concavity; shiny with sparse pubescence that rarely overlaps. Propodeum and petiolar node both lacking a pair of short teeth. Propodeum lacking posteriorly projecting protrusion. Mesopleuron shiny, not dulled by dense pubescence (less than 25 hairs). Metapleuron with a distinct gland orifice. Middle and hind coxae same color as mesosoma, not a strongly contrasting pale white. Waist 1-segmented (may be hidden by gaster). Petiole upright and not appearing flattened. Gaster armed with acidopore. Distinct constriction not visible between abdominal segments 3+4. Gaster (especially first segment) with sparse pilosity, giving it a shiny appearance. Hairs long thick and produced in pairs. Macrosetae on mesosoma of moderate length, thick and stout, weakly tapering to a blunt tip. Body color light reddish brown.
Among other introduced and commonly intercepted Nylanderia species, N. guatemalensis can be distinguished from N. bourbonica, N. fulva and N. steinhelli by its shinier appearance caused by sparse pubescence, which is especially noticeable on the mesosomal dorsum, mesopleuron and first gastral segment. It can be separated from N. flavipes and N. vividula by the antennal scapes, which have more than 10 erect hairs. Additional morphological analysis is required before N. guatemalensis can be reliably separated from N. vaga.
Nylanderia flavipes, Nylanderia vividula, Nylanderia guatemalensis, Nylanderia vaga
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Click here for updated occurrence data and map on GBIF.org
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Lateral view of body, entire, adult worker. Photo by April Nobile, Antweb.org.
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Anterior view of head, adult worker. Photo by April Nobile, Antweb.org.
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Close-up view of antennal scape, adult worker. Antennal scapes with less than 10 erect hairs. The hairs may be also be semierect, but are distinguished from the more common appressed pilosity. Separates Nylanderia guatemalensis and Nylanderia vaga, from Nylanderia flavipes, Nylanderia terricola and Nylanderia vividula.
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Authors: Sarnat and Suarez
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