A new Carboniferous trilobite from Spitsbergen

Ruitang, Wu

doi:10.1017/s0016756800030004

Geol. Mag.

1984

DOI: 10.1017/s0016756800030004

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A new Carboniferous trilobite from Spitsbergen

Wu Ruitang

Abstract: Two Carboniferous trilobites, Ditomopyge convexa sp.nov. and Paladin {Paladin) sp.ind., are described from the Nordenskioldbreen Formation in Spitsbergen. The new material is of considerable interest as it extends the known distribution of Carboniferous trilobites and provides further information on palaeobiogeography.

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Cited by 4 publications

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Ontogeny of the Carboniferous trilobitePaladin eichwaldi shunnerensis(King 1914)

Clarkson

Zhang

1991

Transactions of the Royal Society of Edinburgh: Earth Sciences

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The Carboniferous trilobite Paladin eichwaldi shunnerensis (King 1914), at its type locality in northern England is exceptionally well-preserved, and shows all stages of growth from the degree 0 meraspis onwards. The post-protaspid ontogenyis described here with particular reference to the development of cuticular sculpture. On the dorsal surface of the smallest specimens a polygonal network of raised ridges (cell polygons) is apparent. With size increase, granules progressively appear amongst the polygons, which in turn change into large tubercles as the polygonal network fades. As the trilobite grows into an adult, the tubercles become relatively smaller, and pits, the openings of cuticular canals, appear amongst them. Marginal terrace lines become pronounced. On the hypostome, however, terrace lines become effaced centrally, while large pits develop. In the early meraspis the eyes are “schizochroal”, but the lenses rapidly become closely packed and contiguous and the eye is soon of “holochroal” type. The meraspid phase is passed through very rapidly. Whereas the earlymeraspis could not enroll, its pygidium could be bent down vertically, and this facility might have allowed the larva an escape reaction.

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Ontogeny of the Carboniferous trilobitePaladin eichwaldi shunnerensis(King 1914)

Clarkson

Zhang

1991

Transactions of the Royal Society of Edinburgh: Earth Sciences

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Permian Biostratigraphy of Svalbard (Arctic Norway)—a Review

Nakrem

Nilsson

Mangerud

1992

International Geology Review

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1997

Memoirs

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A new Carboniferous trilobite from Spitsbergen

Cited by 4 publications

References 6 publications

Ontogeny of the Carboniferous trilobitePaladin eichwaldi shunnerensis(King 1914)

Ontogeny of the Carboniferous trilobitePaladin eichwaldi shunnerensis(King 1914)

Permian Biostratigraphy of Svalbard (Arctic Norway)—a Review

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