Ordovician sponge spicules from Spitsbergen, Nevada and Newfoundland: new evidence for hexactinellid and demosponge early diversification

• Published in: Journal of Systematic Palaeontology
• Main Authors: Carrera, Marcelo Gabriel, Maletz, Jörg
• Format: Article in Journal/Newspaper
• Language: English
• Published: Taylor & Francis
• Subjects: Ordovician; Sponge; Spicules; Early Diversification; Cow Head; Table Head; Flat Top; Newfoundland; Spitsbergen
• Online Access: http://hdl.handle.net/11336/25690

Unusually well-preserved spicule assemblages from three Lower to Middle Ordovician localities are examined: Spitsbergen (Floian-Dapingian), Nevada (Vinini Formation, Dapingian) and Newfoundland (Cow Head Group, Tremadocian-lower Darriwilian, and Table Head Group, mid-Darriwilian). The recorded diver...