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Late Paleozoic turrilepadid machaeridians from North America

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Hoare R. D., Mapes R. H., Yancey T. E., Nestell M. K.

Acta Palaeontologica Polonica

1996

tom 41

nr 2

127-145

Turrilepadids are not uncommon in late Paleozoic shales being often associated with ostracodes, foraminifers, and minute molluscs. In North America they range from the late Missippian (Chesterian) to early Permian (Leonardian). Sclerites of the inner scleritome row are more common than outer sclerites. Some clusters have been found. Sclerite consists of two layers with the thicker, lower layer penetrated by a transverse tubular structures oriented perpendicular to the sclerite surface, which may represent canals related to the papillae on the inner surface of the sclerite. Turrilepas Lepros sp. n., T. trigoniodes sp. n., T. asketos sp. n., Clarkeolepis alloeospinosa sp. n., and Ambonlepidas petalos gen. et sp. n. are proposed.

Ograniczanie wyników

1 Acta Palaeontologica Polonica

1 Hoare R. D.

1 Mapes R. H.

1 Nestell M. K.

1 Yancey T. E.

1 1996

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Late Paleozoic turrilepadid machaeridians from North America