Mitrodendron
Quenstedt, 1880, p. 731
Type Species
Lithodendron mitratum Quenstedt, 1857, p. 709, pl. 86, fig. 9; Subsequent Designation Vaughan and Wells 1943, p. 231
Type Specimen: Syntype; GPIT AN/1157-1158; Verified; Dry Preserved
Type Locality: Kimmeridgian (Upper Jurassic) from Nattheim (Germany)
The unique syntype is a silicified specimen. It was figured again in another view in Quenstedt 1880, pl. 171, fig. 42
Classification
Description
Dendroid corallum with deep calices and rapid increase in diameter of branches. Corallite outline various in shape due to the Taschenknospung. Radial elements compact free septa s.s., unequal, of a fairly constant thickness, straight or curved. Distal edge smooth, steeply inclined near the wall, inner edge smooth, lateral faces smooth. No palis. Microstructure. No hexameral symmetry but a bilateral symmetry marked by a cardinal septum. Endotheca of large vesicles. No columella, no synapticulae. Cutting peripheral wall, externally smooth, probably a pachytheca.
Comparisons
Wells, 1956 considered Mitrodendron as a senior synonym of Aulastrea but Mitrodendron is generally considered as more clearly phaceloid and has a marginarium that is not complete around the septal apparatus (Eliášová, 1975). Amphiaulastrea is cerioid.
Remarks
Ten Jurassic nominal species and two Cretaceous (Löser 2000)
Distribution
- Western Europe, Southern Europe, Central Europe, Central Asia, West Asia; Late Jurassic - Early Cretaceous
This page has been in preparation since 19-Aug-2009 16:01
This version was contributed by Bernard Lathuilière on 05-Mar-2016 08:08.
Page authors are: Bernard Lathuilière Ewa Roniewicz. Please contact the editor if you would like to contribute to the diagnosis of this taxon.
The editor is: Bernard Lathuilière
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