Solenocoenia
Roniewicz and Gill, 1976:11
pars Convexastrea d'Orbigny, pars Adelocoenia d'Orbigny; pars Cryptocoenia d'Orbigny; pars Stylina Lamarck
Type Species
Convexastrea semiradiata Etallon, 1864; Original Designation Roniewicz and Gill, 1976:11 in Roniewicz 1976
Type Specimen: Holotype; ; Verified; Dry Preserved
Type Locality: Porrentuy, Switzerland. Late Oxfordian, Late Jurassic.
The type specimen was examined and figured in Beauvais 1964: pl. 5, fig. 2. Other specimen of the type species was figured by Cottreau 1931: 156, pl. 61, fig.3, from coll.d'Orbigny, No 4465 B, MNHN Paris, determined as Cryptocoenia subregularis d'Orbigny. The species is well represented in the coll. d'Orbigny MNHN Paris, under diverse generic and specific names and from diverse localities: Adelocoenia Lanceloti from Wagnon; Cryptocoenia subregularis from vicinity of Dijon, Charcenne, Oyonnax, St. Mihiel, Tonnere; Cryptocoenia sublimbata from Saulce; Cryptocoenia radisensis from St. Mihiel; Pseudocoenia sp. from Chatel Censoir.
Classification
Diagnosis
Plocoid; costae nonconfluent and subconfluent, equal in number with septa. Corallites connected by horizontal canals traversing the peritheca and initiated on the colony surface as gutters. Septa of two size orders, hexameral, internal border regularly denticulated, distal border and septal sides covered with fine granulation; endotheca built of large dissepiments leaning against the wall and horizontal ones at the axial part, dissepiments enter the canals; peritheca built of vertically continuous costae and subtabuloid dissepiments.
Description
The genus was discussed and thin sections of two well illustrated species were presented in Roniewicz 1976: pl. 15, fig. 3,4, Sikharulidze 1979: pl 26, fig. 1a,b, and Errenst 1990: pl. 5, fig. 2a,b; remarkably well preserved colony surface was presented by Lauxmann 1991 (determined as Convexastrea). Sharp granules on septal faces are observable in the specimen from the Berriasian of Bulgaria Roniewicz 2004: fig.16K.
Comparisons
From similar in external morphology genus Pseudocoenia d'Orbigny, genus Solenocoenia differs in the structure of corallites having equal number of septa and costae, while in the former the number of costae doubles that of septa, and dissepimental, not tabular, endotheca, and with different structure of peritheca: the presence of connecting canals, and tabuloid shape of perithecal dissepiments. Eminent granulation of septal sides observable in some specimens in the latter indicates also microstructural difference with the former.
Remarks
Four species are known.
Distribution
- Southern Europe; Late Jurassic - Early Cretaceous
- Western Europe; Late Jurassic
- Central Europe; Late Jurassic
The earliest occurrence is this from the middle Oxfordian of Holy Cross Mts, Poland and the latest that from the Albian of Caucasus.This page has been in preparation since 20-Aug-2009 07:43
This version was contributed by Ewa Roniewicz on 27-Nov-2010 11:57.
Page authors are: 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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