Abstract
The descriptions and illustrations of two new species of Podonomus, P. tehuelche and P. quinquesetosus are presented. Both species belong to the Brundin’s decarthrus group and were collected in an "orogenic island", representing the first record of a named Podonomus species from Argentina outside the Andean-Patagonian region. Immatures and adults were collected at relatively low altitude for the genus (500 to 800 m a.s.l.). A key for the South American male adults and pupae of the decarthrus group is presented.
References
Ashe, P. & O’Connor, J.P. (2009) A World Catalogue of Chironomidae (Diptera). Part 1. Buchonomyiinae, Chilenomyiinae, Podonominae, Aphroteniinae, Tanypodinae, Usambaromyiinae, Diamesinae, Prodiamesinae and Telmatogetoninae, Irish Biogeographical Society & National Museum of Ireland, Dublin, 445 pp.
Brundin, L. (1966) Transantarctic relationships and their significance, as evidenced by chironomid midges. With a monograph of the subfamilies Podonominae and Aphroteniinae and the Austral Heptagyiae. Kunglika Svenska Vetenskapakadamiens Handlingar, 11(1), 1–474.
Cabrera, A. & Willink, A. (1980) Biogeografía de América Latina. Organización de Estados Americanos. Serie de Biología. Monografía No. 13. Washington, D.C. U.S.A. 114 pp.
Crisci, J.V., Freire, S.E., Sancho, G. & Katinas, L. (2001) Historical biogeography of the Asteraceae from Tandilia and Ventania mountain ranges (Buenos Aires, Argentina). Cladasia, 23(1), 21–41.
Dalla Salda, L., Cingolani, C. & Varela, R. (1992) Early Paleozoic orogenic belt of the Andes in southwestern South America: Result of Laurentia-Gondwana collision? Geology, 20, 617–620.
Epler, J.H. (2001) Identification Manual for the larval Chironomidae (Diptera) of North and South Carolina. A guide to the taxonomy of the midges of the southeastern United States, including Florida. Special Publication SJ2001-SP13. North Carolina.
Department of Environment and Natural Resources, Raleigh, NC, and St. Johns River Water Management District, Palatka, FL. 526 pp. http://home.earthlink.net/~johnepler/index.html (accessed 10 July 2012)
Frenguelli, J. (1950) Rasgos generales de la morfología y la geología de la provincia de Buenos Aires. La Plata, Argentina: Laboratorio de Ensayo de Materiales e Investigaciones Tecnológicas, Serie II, 33, 1–33.
Kristensen, M.J. & Frangi, J.L. (1995) La Sierra de la Ventana: Una Isla de Biodiversidad. Ciencia Hoy, 5(30), 25–34.
Roque, F.O. & Trivinho-Strixino, S. (2004) Podonomus pepinellii n. sp., first record of the genus and subfamily from Brazil (Diptera: Chironomidae: Podonominae). Zootaxa, 689, 1–7.
Paggi, A.C. (2007) A new Neotropical species of the genus Thienemanniella Kieffer, 1911 (Diptera: Chironomidae, Orthocladiinae). In: Andersen, T. (Ed), Contributions to the Systematics and Ecology of Aquatic Diptera: A Tribute to Ole A. Saether. The Caddis Press. Columbus, Ohio, pp. 247–254.
Ringuelet, R.A. (1961) Rasgos fundamentales de la zoogeografía de la Argentina. Physis, 22(63), 151–170.
Roig-Juñent, S., Flores, G.E. & Mattoni, C. (2003) Consideraciones biogeográficas de la precordillera (Argentina), basadas en artrópodos epígeos. In: Morrone, J.J. & Llorente-Bousquets, J.E. (Eds), Una perspectiva latinoamericana de la Biogeografía, México, D. F.: Las Prensas de Ciencias, UNAM, pp. 275–288.
Sæther, O.A. (1980) Glossary of chironomid morphology terminology (Diptera: Chironomidae). Entomologica scandinavica, supplement, 14, 1–51.
Tomezzolli, R.N. & Cristallini, E.O. (2004) Secciones estructurales de las sierras australes de la provincia de Buenos Aires: Repetición de la secuencia estratigráfica a partir de fallas inversas? Revista de la Asociación Geológica Argentina, 59, 330–340.