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First hexactinellid sponge reported from the Upper Triassic Nayband formation of central Iran

Published online by Cambridge University Press:  14 July 2015

J. Keith Rigby  and
B. Senowbari-Daryan
J. Keith Rigby
Affiliation:
Department of Geology, Brigham Young University, Provo, Utah 84604, USA, 〈[email protected]〉
B. Senowbari-Daryan
Affiliation:
Institute of Paleontology, University of Erlangen-Nürnberg, Loewenichstrasse 28, D-91054 Erlangen, Germany, 〈[email protected]〉
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Extract

Sponges, along with scleractinian corals, are among the main reef-building organisms in Triassic reefs. Hypercalcified groups, including the chambered sphinctozoans, and the unchambered inozoans, chaetetids, and spongiomorphids, represent the most abundant Triassic reef-building sponges. Earlier workers have described elements of the latter group as “hydrozoans.” Hexactinellid sponges, abundant in some Permian reefs (e.g., in Texas, Finks, 1960), are rarely known from similar Triassic deposits, in general (Tichy, 1975), and particularly from Upper Triassic stratigraphic units. Hexactinellid sponges have been sporadically reported from well-investigated Upper Triassic reefs in the western Tethyan region (e.g., Keupp et al., 1989). However, a variety of hexactinellid sponges have been reported from Upper Triassic deposits and reefal limestones of the northern and central Tethyan realm (Boiko, 1990; Wu, 1989; Wu and Xiao, 1989; Rigby et al., 1998).

Type
Paleontological Notes
Information
Journal of Paleontology , Volume 81 , Issue 6 , November 2007 , pp. 1538 - 1542
Copyright
Copyright © The Paleontological Society 

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