Abstract
A new tiger beetle species, Eunota albicauda Duran, Roman & Huber n. sp., of the tribe Cicindelini, is described from the Gulf Coast of southern Texas. It is superficially most similar to E. togata (LaFerté-Sénectère, 1841) and E. circumpicta (LaFerté-Sénectère, 1841) but is distinguished on the basis of multiple character states not shared with either species. We reconstructed a phylogeny for Eunota to address the placement of this new taxon. Little is known about the biology or distribution of this exceedingly rare species. Despite extensive tiger beetle collecting from this region, only two specimens of E. albicauda n. sp. are known, collected in the mid-20th century. Future efforts to locate additional specimens should focus on coastal salt flats and marshes in southern Texas, including areas near the United States-Mexico border, late in the season (September-October).
References
Charlton, R.E. & Kopper, B.J. (2000) An Unexpected Range Extension for Cicindela trifasciata F. (Coleoptera: Carabidae: Cicindelinae). The Coleopterist’s Bulletin, 54, 266–268. https://doi.org/10.1649/0010-065X(2000)054[0266:AUREFC]2.0.CO;2
Ciegler, J.C. (1997) Tiger beetles of South Carolina (Coleoptera: Cicindelidae). The Coleopterist’s Bulletin, 51, 177–192.
Comer, P., Faber-Langendoen, D., Evans, R., Gawler, S., Josse. C., Kittel, G., Menard, S., Nordman, C., Pyne, M., Reid, M., Russo, M. Schulz, K., Snow, K., Teague, J. & White, R. (2003) Ecological systems of the United States: A working classification of U.S. terrestrial systems. NatureServe, Arlington, Virginia, 75 pp.
Duran, D.P. & Gough, H.M. (2019) Unifying systematics and taxonomy: Nomenclatural changes to Nearctic tiger beetles (Coleoptera: Carabidae: Cicindelinae) based on phylogenetics, morphology and life history. Insecta Mundi, 0727, 1–12. https://doi.org/10.5281/zenodo.3467083
Duran, D.P. & Moravec, J. (2013) A new species of the genus Pentacomia from Panama (Coleoptera: Cicindelidae). Acta Entomologica Musei Nationalis Pragae, 53 (1), 49–57.
Gough, H.M., Duran, D.P., Kawahara, A.Y. & Toussaint, E.F. (2019) A comprehensive molecular phylogeny of tiger beetles (Coleoptera, Carabidae, Cicindelinae). Systematic Entomology, 44, 305–321. https://doi.org/10.1111/syen.12324
Graves, R.C. (1981) Offshore flight in Cicindela trifasciata. Cicindela, 13, 45–47.
Kalyaanamoorthy, S., Minh, B.Q., Wong, T.K., von Haeseler, A. & Jermiin, L.S. (2017) ModelFinder: fast model selection for accurate phylogenetic estimates. Nature Methods, 14, 587. https://doi.org/10.1038/nmeth.4285
Maddison, W.P. & Maddison, D.R. (2019) Mesquite: a modular system for evolutionary analysis. Version 3.61. Available from: http://www.mesquiteproject.org (accessed 8 November 2021)
NCBI Resource Coordinators. (2018) Database resources of the National Center for Biotechnology Information. Nucleic Acids Research, 46 (D1), D8–D13. https://doi.org/10.1093/nar/gkx1095
Nguyen, L.T., Schmidt, H.A., von Haeseler, A. & Minh, B.Q. (2014) IQ-TREE: a fast and effective stochastic algorithm for estimating maximum-likelihood phylogenies. Molecular Biology and Evolution, 32, 268–274. https://doi.org/10.1093/molbev/msu300
Pearson, D.L., Knisley, C.B., Duran, D.P. & Kazilek, C.J. (2015) A field guide to the tiger beetles of the United States and Canada: identification, natural history, and distribution of the Cicindelinae. 2nd Edition. Oxford University Press, New York, 227 pp.
Rivalier, E. (1954) Démembrement du genre Cicindela Linné. II. Faune américaine. Revue Française d'Entomologie, 21 (4), 249–268.
Wiesner, J. (2020) Checklist of the tiger beetles of the world, 2nd Edition. Edition Winterwork, Borsdorf, 540 pp.
Willis, H.L. (1968) Key to the species of Cicindela of North America north of Mexico (Coleoptera: Cicindelidae). Journal of the Kansas Entomological Society, 41, 303– 317.