Coronado and Rodriguez (2009) recognized syringoporoid corals in the algal-mounds of Cosgaya Formation in Cantabria (Spain) where they occur associated with calcareous algae, chaetetids and rugose corals
Lower Permian colonial rugose corals
, western and northwestern Pangaea; taxonomy and distribution.
Crenulites is a cerioid colonial rugose coral
genus, and Protrochiscolithus and Calapoecia are tabulate corals.
The above situation shows that general climate or temperature alone cannot explain all aspects of rugose coral
Most of the other macrofossils (gastropods, trilobites, rugose corals
, cephalopods, sponges, algae) collected were taxonomically not identified.
The exposed part of the mound is approximately 25 m wide and up to 1.6 m thick and is composed of rugose corals
in skeletal debris.
In late Ordovician Rawtheyan times, the rugose coral
fauna in Baltoscandia was dominated by species of non-fossulate streptelasmatid genera, e.g., Streptelasma Hall, Bodophyllum Neuman, Borelasma Neuman, and Helicelasma Neuman.
. The pre-crisis rugose coral
assemblage shows a gradual taxonomic and quantitative decrease in genera and species of the widespread family Durhaminidae.
On the taxonomy of the genus Streptelasma Hall and a description of some new rugose corals
. ENSV Teaduste Akadeemia Geoloogia Instituudi Uurimised, 2, 19-26 [in Russian].
Rubble horizons containing broken rugose corals
that are not in growth position are interpreted as wash over facies that were deposited behind the mound crest during storms.
What is more, altered community structure is also visible in the composition of the skeletal reef builders in the studied buildup, characterized by the lack of rugose corals
and the abundance of heliolitid corals.
The most common fossils are representatives of the open-shelf groups: rugose corals
, bryozoans, brachiopods.