2024-03-29T02:25:24Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/297332016-02-17T04:54:19Zcom_10261_83com_10261_8col_10261_336
00925njm 22002777a 4500
dc
Parsley, Ronald L.
author
Gutiérrez-Marco, J. C.
author
2005
Numerous specimens of the ankyroid Vizcainocarpus naimae sp. nov. (Stylophora, Echinodermata) have been found in middle Arenigian shallow-water, inner shelf, fine to medium grained siliciclastics of the Oum-er-Rbia Formation, located in the Imfout Syncline in Morocco’s western
Meseta. Their occurrence in this sedimentary/ecological setting is atypical because ankyroids are most common in deeper water calcisiltites and limestones.
Aspects of orientation and feeding habits in the debate over stylophorans as echinoderms or calcichordates (ongoing since the 1960s) appear to be largely resolved by data derived from these specimens. The aulacophores of most specimens face into the prevailing sediment-depositing current and appear
to have draped over the adjacent sand wave. There is no evidence that they were orientated in the calcichordate mode with the convex side of the theca facing down and aulacophore extending into the substrate, as proposed by Jefferies (1973, 1986, 2001) and Sutcliffe et al. (2000).
Bulletin of Geosciences 80(3): 185-192 (2005)
1214-1119
http://hdl.handle.net/10261/29733
Echinodermata
Stylophorans
Vizcainocarpus
Middle arenig
Imfout syncline
Morocco
Stylophorans in middle Arenig shallow water siliciclastics: Vizcainocarpus from the Imfout Syncline in Morocco’s western Meseta