Valcourt (city), Quebec
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Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Valcouroceratidae is a family within the Oncocerida, nautiloid cephalopods from the middle and upper Ordovician, established by Rousseau Flower in 1945.Valcouroceratids are characterized by exogastric cyrtocones and brevicones that change during the life span from compressed to depressed or subtriangular in cross section, and which have ventral siphuncles that are cyrtochoanitic and which contain lammelar actinosiphonate fillings. The actinosiphonate fillings, com...
Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Valcouroceratidae is a family within the Oncocerida, nautiloid cephalopods from the middle and upper Ordovician, established by Rousseau Flower in 1945.Valcouroceratids are characterized by exogastric cyrtocones and brevicones that change during the life span from compressed to depressed or subtriangular in cross section, and which have ventral siphuncles that are cyrtochoanitic and which contain lammelar actinosiphonate fillings. The actinosiphonate fillings, commonly referred to as deposits, are radially inward projections of the connecting rings that extend logitudinally along the inner wall of the siphuncle and project forward as blades into the siphuncle interior from the septal foremina.(Sweet 1964, Flower 1950).
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