the Aulotortidae, in the mudstone facies.

Plate 1. Norian — Rhaetian corals and calcisponges from the Asinepe Limestone, Manusela-Mosso region (south central Scram); locality Waesa, north of Mosso village. (1) A. crassisepta Reuss; (la) longitudinal section; (lb) transversal section. Sample Lse39. (2) Retiophyllia sp.; (2a) transverse section with the small sedimentary dyke; (2b) detail showing the distichophylhd structure. Sample Lse39. (3) O. norica (Frech); transverse section. Sample Lse34. (4) B. intabulata (Wanner); longitudinal and transverse sections of tubes. The nansverse section shows an astrorhizal structure. Sample Lse33.

86 R. Martini et al. / Palaeogeography, Palaeoclimatology, Palaeoecology 206 (2004) 75 — 102

On the basis of the stratigraphic index foraminifer T. hantkeni Majzon, which occurs at different levels of the Upper Triassic succession of Scram, both associ- ations are of Late Norian (Sevatian) to Rhaetian age (T. hantkeni Biozone).

The porcelaneous foraminifers are restricted to the buildup flanks, and imllnediate neighbourhood; this group is well-represented by several, genera: Galea nella (Plate 2(1 — 6, 7a and 8 — 14)), Cucurbita (Plate 3(19 and 21 — 24)), Orthotrinacria (Plate 3(17 and 18)), Bispiranella (Plate 3(9 — 16)), Costifera'? (Plate 2(15)), Miliolechina (Plate 2(20 — 21)), Sigmoilina (Plate 4(15 — 18)), Ophthalmidium, Paraophthalmi dium (Plates 2(7B) and 3(20)), Hydrania (Plate 2(16 — 19)) and Planiinvoluta carinata Leischner (Plate 3(1 — 4)). Other foraminifers, such as Palae olituonella (Plate 4(19 — 21)), Kaevelia?, Endoteba (Plate 4(12 and 13)), Endotebanella (Plate 4(14)), Endotriada (Plate 4(11)), Endotriadella (Plate 4(10)), Tetrataxis inflata Kristan (Plate 5(13)), Duo taxis birmanica Bronnimann, Whittaker and Zaninetti (Plates 4(9A) and 5(11 and 12)) and Alpinophrag mium perforatum Flugel, are commonly observed together with the porcelaneous representatives. Less abundant are species of the families Miliolidae, Duo- stominidae, Nodosariidae, small "Textulariidae" and other forms.