Araucanastrea

Morsch, 1996, p. 678

Type Species

Araucanastrea minuscula Morsch 1996 p. 679; Original Designation Morsch 1996 p. 679

Type Specimen: Holotype; MOZ P 4801/1 MOZ; Verified; Thin Section

Type Locality: Barda Negra South, Neuquén Province, Argentina – Jurassic (Lower Bajocian) – Giebeli and Singularis biozone

8 paratypes exist, dry specimens and thin sections. P 4801/2 MOZ, P 4801/3 MOZ, P 4801/4 MOZ, P 4801/5 MOZ, P 4801/6 MOZ, P 4801/7 MOZ, P 4801/8 MOZ and P 1632/1 MOZ

Diagnosis

Colony cerioid; parietal columella formed by trabecula ; compact para-septothecal wall; Cellular endotheca; extracalicular increase producing 1, 2 or 3 corallites among 3 adults corallites.

Comparisons

Like Actinastrea, Astrocoenia and correlate genera but differing by to have parietal columella formed by trabecular projection, by extracalicular increase, by compact wall, by free septa, and without trabecular projection on external septa edge. Like Chondrocoenia but differing by free septa and because Araucanastrea have no costosepta. Like Crassistela but differing by extracalicular increase and parietal columella. Like Melikerona Alloiteau – non Glenarea according to Eliasova – but differing by parietal columella and trabecular projection. Like Coenastrea but differing by parietal columella. Like Allocoenia but differing by parietal columella and extracalicular increase.

Distribution

• South America; Middle Jurassic

This page has been in preparation since 12-Aug-2009 14:41

This version was contributed by Bernard Lathuilière on 12-Aug-2009 15:01.

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

The editor is: Bernard Lathuilière