FLETCHERVIEWIA-SEPTATA - A NEW HIGH-SPIRED, SEPTATE GASTROPOD FROM THE DEVONIAN OF NORTH QUEENSLAND

Authors
Citation
Ag. Cook, FLETCHERVIEWIA-SEPTATA - A NEW HIGH-SPIRED, SEPTATE GASTROPOD FROM THE DEVONIAN OF NORTH QUEENSLAND, Journal of paleontology, 67(5), 1993, pp. 816-821
Citations number
20
Categorie Soggetti
Paleontology
Journal title
ISSN journal
00223360
Volume
67
Issue
5
Year of publication
1993
Pages
816 - 821
Database
ISI
SICI code
0022-3360(1993)67:5<816:F-ANHS>2.0.ZU;2-1
Abstract
A high-spired septate gastropod, Fletcherviewia septata n. gen. and sp ., occurs in a distinctive faunule at the base of the Middle Devonian Fanning River Group, within the Burdekin Subprovince, near Townsville, North Queensland, Australia. This species is one of four large, thick -shelled gastropods associated with sandstone and sandstone-limestone facies; the sediments are interpreted as shallow marine, nearshore, mo bile sand bars on a moderate-energy carbonate-clastic shelf. Strategie s for the algal-grazing snails on the turbulent substrate are rolling for compact robust forms and anchoring, using the wide carina, for for ms such as Fletcherviewia. Septation in Fletcherviewia is rationalized in terms of the ability to vacate early whorls, thus reducing body vo lume and avoiding any detrimental effect as a result of loss of early- formed whorls.