Distichophyllia
Cuif, 1975: 304
In earlier literature described as Montlivaltia Lamouroux
Type Species
Montlivaltia norica Frech 1890: 39: pl. 3, fig. 8,9; pl. 10, fig. 1-5, pl. 18, fig. 17; Original Designation Cuif, 1975: 304
Type Specimen: Syntype; BSPG AS XII 46, 48; Verified; Dry Preserved
Type Locality: Grosser Zlambachgraben, Northern Calcareous Alps. Rhaetian, LateTriassic
Large collections are housed at GBA and NHMW.
Classification
Diagnosis
Solitary with epithecal,pellicular wall. Radial elements costoseptal. Mid-septal zone zigzag. Whole lateral septal stereome organized into well delimited fascicles of fibres provided with axis. Lateral septal micromorphology granular. Dissepiments small, vesicular, abundant.
Description
Described and figured in Frech, 1890; microstructure described in Cuif 1975 and Roniewicz 1989:39-41, pl.6,fig.2-4.
Comparisons
From the most similar Coryphyllia it differs, primarily, in having zigzag mid-septal zone and lateral stereome organized into thick lateral fascicles of fibres provided with axis, and also in a lack of short septa of the lonsdaleoid type.
Remarks
Type species re-described in Roniewicz 1989:39, with discussion on distichophyllid type of septal microstructure; additional descriptions of other species in Roniewicz 1996:25. Six species known from the Norian and Rhaetian.
Distribution
- Southern Europe; Late Triassic
- Central Asia; Late Triassic
- North America; Late Triassic
This page has been in preparation since 18-Apr-2009 08:03
This version was contributed by Ewa Roniewicz on 09-Nov-2010 19:17.
Page authors are: Ewa Roniewicz. Please contact the editor if you would like to contribute to the diagnosis of this taxon.
The editor is: Ewa Roniewicz
|