Kuhnastraea
Cuif, 1976: 83
Type Species
Phyllocoenia decussata Reuss, 1854: 99, pl. 13, fig. 2, 3; Original Designation Cuif, 1976: 83
Type Specimen: Neotype; GBA 1982/12/787; Verified; Dry Preserved
Type Locality: Fischerwiese near Aussee, Northern Calcarreous Alps. Zlambach Beds, Rhaetian, Late Triassic
Holotype originating from vicinity of Aussee has been lost. Neotype was chosen by Roniewicz 1989:71. Large collections are housed in GBA and NHMW with thin sections of some specimens.
Classification
Diagnosis
Kuhnastreoid. Increase by intracalicular subequivalent division without skeletal connections between the centers, rarely by intercalicular formation of calice. Calices convex, separated from each other by a depression. Intercorallite trabecular palisaded wall is marked as a thin line at the middle of the depression. Inner stereomal wall frequent. Radial elements costo-septal in type, fusiform, exsert. Intra- and extra-calicular dissepiments vesicular; lonsdaleoid septa present. Mid-septal zone from straight to zigzag; lateral septal stereome varying in organization from fibers subvertical to the midseptal zone, to the fascicles provided with axis. Septal lateral micromorphology granular.
Description
Morphology and microstructure of the type and other species are described by Cuif 1976:78-84, text-fig.3,4;pl.3,fig.1-6, and Roniewicz 1989:70,pl.14,fig.3;pl.17,fig.1;pl.18,fig.1-7.
Comparisons
From closely related Palaeastraea it differs in formation of palisaded trabecular wall.
Remarks
Original diagnosis has been emended in Roniewicz 1989:70. Six species have bee described, so far.
Distribution
- Southern Europe; Late Triassic
- East Asia; Late Triassic
- North America; Late Triassic
Dolomites,Southern Alps: Carnian. Taurus Mountains, Anatolia: Early Norian. Eastern Asia: Norian. North America: Norian.Northern Alps: Rhaetian.This page has been in preparation since 19-Apr-2009 09:27
This version was contributed by Ewa Roniewicz on 08-Nov-2010 12:23.
Page authors are: Francesca Benzoni. Please contact the editor if you would like to contribute to the diagnosis of this taxon.
The editor is: Ewa Roniewicz
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