NON-MARINE OSTRACODS FROM RIO SALI FORMATION, TUCUMAN PROVINCE, ARGENTINA

ESPINDOLA VERONICA; DÍAZ A.R.

Valdivia

Congreso; I Congreso Iberoamericano de Limnología; 2016

5tR6DOt)RUPDWLRQLVGH¿QHGDVDWUDQVJUHVVLYHODFXVWULQHZDWHUERGZLWKFRDVWDODQGRSHQODNHSKDVHVThis Formation is correlated with the transgressive upper lacustrine phases of San Jose Formation of theCalchaquíes valleys and the Anta Formation, both assigned to the middle Miocene, Gavriloff & Bossi, 1992.7KHRVWUDFRGVZHUHFROOHFWHGDWNPRQURDGFRRUGLQDWHV?¶6?¶:LQ¿QHVDQGVWUDWDFRrrespondingto coastal facies of an open lake. Sediments were processed following conventional techniquesXVHGWRFDOFDUHRXVPLFURIRVVLOVFRQVLVWLQJLQFKHPLFDOWUHDWPHQWRIKGURJHQSHUR[LGHDQGWKHUPRVtaticoven drying. The specimens were mounted and photographed with SEM. Six species of non-marineostracods: Darwinula stevensoni, Heterocypris incongruens, Vestalenula danielopoli, Penthesilenula incae,3VSDQG3VSDUHUHFRUGHGIRUWKH¿UVWWLPHIURPWKH6DOLQD/ySH]0HPEHURIWKHWKH5tR6DOt)RUPDtion(Choromoro Group) in Tucuman province, northwestern Argentina. The fact that all these fossil specieshave living representatives means that there is a direct interaction with modern analogues from the ecologicalpoint of view of functional morphology and evolution. Based on the characters of the fossil taxa, theassociation indicates shallow environments probably oligohaline lagoons, developed under temperate toVXEWURSLFDOFOLPDWHZLWKWHPSHUDWXUHVUDQJLQJIURP?WR?&LQDYHUDJH7KHVHQHZ¿QGLQJVWRJHWKHUwith the previously cited by Gavriloff and Bossi (1992) and Espindola et al. (2009), add to a better understandingof the whole microfauna in this formation.