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Corals / stomach animals


Corail animal estomac

Filled honeycombs with a series of stratum

Favosites sp.
Manitoulain Island (Ontario) - Donate by Paul Copper

 Corail animal estomac

Honeybombs on chains, labyrinth structure
Halycithe catenularia
Manitoulain Island (Ontario) - Donate by Paul Copper

Corail animal estomac

Lived in seperate chambers
Solitary rugosan corals
Mann Island (Québec) - Donated by Andrée Nault, 
Society of Témiscamingue history collection

Corail animal estomac

Tabulate Coral : the tubular structures are connected for food 
Syringopora Verticillata
Mann Island (Québec) - Society of Témiscamingue history collection

 Corail animal estomac





First Period of Appearance


Appeared 478 millions years ago, the first species prospered until the extinction during the Permian period 252 million years ago. During that period, current corals species replaced them.




Corals are marine animals with the looks of a plant, and an external skeleton made of minerals.


Illustration : Each individual (polyp) is a primitive animal composed almost exclusively of a stomach that opens on an orifice that that serves both as an anus and a mouth.


My Neighbour Is my Clone


Corals commonly live in colony with many of them part of the same skeleton: it starts with a larva fixing itself and building a skeleton that with surround it. The second day, it will divide itself into two or three by budding. With time, hundreds of individuals will grow the colony and give it a reversed pyramidal shape on which only the top layers is alive. All animals (polyps) are thus twins (or clones).


In Témiscamingue


Current corals and possibly ancient corals as well often live in symbiosis with an algae making photosynthesis for both of them while the corals offers then shelters and ground in shallow and well lit waters.

As they are abundant in Témiscamingue, they testify to the fact a shallow sea was here.

The main types of ancient corals that are found in the area are :


Tabulate Corals : colonial corals


Favosites : lived in honeycomb shaped colonies of 6-sided cells
Syringopora : lived in tubular structure
Halysites : formed chains of cells, the entire skeleton being shaped like a labyrinth


Rugosa Corals


Solitary rugosan corals : horn-shaped shell with a single animal (polyp)














































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