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1 January 2010 Multivariate Discrimination and Description of a New Species of Tapinoma from the Western United States
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Abstract

The ant Tapinoma sessile (Say) 1836 is one of the most widely distributed ants in North America; yet, it has received very little attention from biologists apart from its ability to infest houses. The original species description does not adequately account for the phenotypic variation present in this species of typically darkly concolored ant. In California, a bicolored morph was discovered that superficially resembles T. sessile; hence, its species status was questioned. Comparative morphometric analysis indicates that the bicolored ants are consistently distinguishable across a range of characters, and allometric techniques conclusively demonstrate that these two morphs are divergent. Based on the analysis of morphological data it was concluded that the bicolored ant is not T. sessile and is described as a new species, Tapinoma schreiberi. A neotype of T. sessile also is designated in this article, and measurement data are presented to assist taxonomists and delimit the morphological boundaries of T. sessile.

© 2010 Entomological Society of America
Christopher A. Hamm "Multivariate Discrimination and Description of a New Species of Tapinoma from the Western United States," Annals of the Entomological Society of America 103(1), 20-29, (1 January 2010). https://doi.org/10.1603/008.103.0104
Received: 20 December 2008; Accepted: 1 October 2009; Published: 1 January 2010
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