Late Quaternary Lacustrine Ostracodes (Ostracoda, Crustacea) And Charophytes (Charophyta, Charales) From The Puna Plateau (Argentina).

PALACIOS FEST ; CUSMINSKY, G. C; MCGLUE

JOURNAL OF MICROPALEONTOLOGY

GEOLOGICAL SOC PUBL HOUSE

Lugar: Londres; Año: 2016 vol. 35 p. 66 - 78

0262-821X

SE ADJUNTA PDF CON CARTA DE ACEPTACION DE TRABAJO Y TRABAJOABSTRACT- Relatively little is known about the recent paleontological records of the high-altitude closed basin lakes of the Central Andes, but a great need exists to remedy this knowledge gap if microfossils are to be used to infer climatic and ecological transitions from lake sediment cores. Here, eight species of non-marine ostracodes and two calcareous algae are recorded from modern sediments and late Quaternary strata from Laguna de los Pozuelos, Jujuy Province, northwestern Argentina (Noroeste Argentino; NOA). Four species, Limnocythere alexanderi, Limnocythere foresteri, Limnocythere lysandrosi, and Limnocythere ruipunctifinalis are described and identified as new species. Limnocythere titicaca has only been recorded in Lake Titicaca prior to this study and this is the first time the species is recognized outside of Bolivia. The cypridoideans Ilyocypris ramirezi, Eucypris virgata, and Chlamydotheca pseudobrasiliensis are known species that are rare in the stratigraphic sequence captured in core LP06-6A. Also, the gyrogonites of two well-known species of Charophyta, Chara filiformis and Chara vulgaris,are occasionally present in the sedimentary material studied from Laguna de los Pozuelos. The results provide a new vehicle for clarifying the Quaternary paleohydrological history of the Pozuelos Basin, which is a RAMSAR wetland that is likely sensitive to global environmental change.