Las unidades dolomías de Landete (d. L.), areniscas, margas y yesos del Mas (a.m.y.M.) y dolomías y calizas de Cañete (d.c.C.) (Anisiense-parte inferior del Camiense, Triásico mediosuperior) de base a tecbo respectivamente, constituyen la Facies Muscbelkalk al SE. de la Rama Castel1ana de la Cordil1era Ibérica. Este trabajo enfoca el estudio paleontológico y de los medios sedimentarios de las dos unidades carbonatadas (d.L. y d.c.C.). Para el1o, se ban utilizado 10 columnas estratigráficas a lo largo de todo el área de estudio en las cuales se ban diferenciado 9 asociaciones de facies constituidas cada una por una secuencia característica de menos de 2 m. de espesor. Se ba escogido una serie tipo en la que se ban diferenciado 9 tramos constituidos cada uno de el10s por la repetición de una misma secuencia de las anteriormente citadas. Del análisis de estas secuencias han sido diferenciados tres distintos subambientes para cada unidad carbonatada, siendo éstos de bajio, zona protegida poco profunda y rona supramareal «

The Muscbelkalk Facies of tbe SE. Iberian Ranges is formed by tbe Landete Dolomites (d.L.), Mas Sandstones, Marls and Gypsum (a.m.y.M) and Cañete Dolomites and Limestone (d.c.C.) Formations. Tbis paper deals on tbe paleontology and sedimentary environments of tbe two carbonatic Formations (d.L. and d.c.C.). Ten sections all over the area have been studied in detail and nine facies associations, each one forroed by sequences less tban 2m. tbick, bave been differenciated. Possibly, due to tbe dolomitization, fossil register is in general considered to be scaree and badly preserved. The analysis of tbe sequences reveals tbree different subenvironments (shoal, lagoon and sabkha). Two episodes can be differenciated for each carbonatic formation during the development of the depositional system: first, a short-lived transgression fol1owed by a longer regresive periodo By far, the most abundant fossils are Molluscs of Bivalvia Class, forming a benthonic association dominated by suspensivores. The bivalves are found in both carbonated units, although in the upper one the faunistic richness and specific diversity are higher. The taphonomic analysis reveals sorne autochtonous assoclatlOns in both formations. The bivalve association found at the last beds of the upper Muschelkalk Facies of the lberian Ranges is known as tbe «Teruel Fauna», well represented in tbe Villora and Henarejos sections. The association consists on endo and epibisate Bivalves and sorne cemented ones, and represents different shallow carbonatic marine subenvironments. A Section·Type has been cboosen and divided into 4 and 5 main levels or parts (for d.L. and d.c.C. respectively). Each of these parts is dominated by the abundance of one of tbe facies associations.