Yagonia Roberts (Brachiopoda: Chonetidina) from the Malimán Formation, Lower Carboniferous of western Argentina: paleobiogeographical implications

TABOADA ARTURO C; SHI GUANG R.

ALCHERINGA

TAYLOR & FRANCIS LTD

Lugar: Londres; Año: 2009 p. 223 - 235

0311-5518

The new Anoplid chonetid species Yagonia furquei sp. nov. is described from the Lower Carboniferous (Late Tournaisian-Early Visean) Malimán Formation of western Argentina. The associated temperate “Malimanian” fauna would be indicating a precursor biotic segregation that took place through western coastline of Gondwana (actually southwestern South America), that anticipate the Late Visean global cooling and major paleolatitudinal biotic differentiation. Yagonia occurrences would be evidence of a “South-North” faunal migration pathway (Austropanthalassic-Rheic ocean corridor) established in western Gondwana during the Late Early Carboniferous.