Morsch, 1990, p. 24

Type Species

Australoseris radialis Morsch, 1990, p. 27 , pl.1 (fig.4,5), pl.2 (fig.1-5); Original Designation Morsch, 1990, p. 24

Type Specimen: Holotype; MOZ P 4654a; Verified; Dry Preserved

Type Locality: Southern end of Sierra de la Vaca Muerta –La Manga Formation – Neuguén Province, Argentina – Jurassic (limit of Middle and Latter Oxfordian).

The holotype is best described in: Morsch, 1990, p.27 in Ameghiniana 27(1-2):19-28 Lam. I fig. 5, Lam. II figs 2, 4.


Massive thamnastero-meandroid colony. Long single or double opened meandroids series, without single calices. Compact septa, confluent on collines and biseptal on valleys. Discontinuous tectiform collines without ambulacra. Abundant trabecular endotheca. Styliform columella attached at last one septum. Intracalicinal increase. Wall absent. Synapticulae absent.


Like Fungiastrea, Pseudoseris, Polyastreopsis, Eugyropsis, Eugyra and Diplothecophyllia but differing by the styliform columella, the confluent septa and the absence of wall. Like Myriophyllia but differing by absence of paliforms lobes. Like Diplogyra but differing by the confluent septa. Like Periseris but differing by the compact septa and absence of wall. Like Comoseris but differing by the compact septa.


  • South America; Late Jurassic
La Manga Formation, Argentina – Jurassic (limit between Middle Oxfordian, Late Oxfordian)

This page has been in preparation since 18-Apr-2009 18:25

This version was contributed by Ann Budd on 27-Feb-2012 21:44.

Page authors are: Suzana Morsch. Please contact the editor if you would like to contribute to the diagnosis of this taxon.

The editor is: Ann Budd

paratype of Australoseris radialis Morsch
paratype of Australoseris radialis Morsch