Notes on selected Cretaceous echinoids from south-central Sakhalin, Far East Russia
Abstract From Albian, Santonian and Campanian strata in south-central Sakhalin, four echinoid taxa are described, illustrated and discussed. In Far East Russia, echinoids are rare constituents amongst mid- and Late Cretaceous macrofaunal assemblages in which inoceramid and non-inoceramid bivalves, p...
Published in: | Netherlands Journal of Geosciences - Geologie en Mijnbouw |
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Online Access: | http://dx.doi.org/10.1017/s0016774600000056 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0016774600000056 |
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crcambridgeupr:10.1017/s0016774600000056 2024-03-03T08:48:31+00:00 Notes on selected Cretaceous echinoids from south-central Sakhalin, Far East Russia Jagt, J.W.M. Jagt-Yazykova, E.A. Zonova, T.D. 2013 http://dx.doi.org/10.1017/s0016774600000056 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0016774600000056 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Netherlands Journal of Geosciences - Geologie en Mijnbouw volume 92, issue 2-3, page 123-132 ISSN 0016-7746 1573-9708 Geology journal-article 2013 crcambridgeupr https://doi.org/10.1017/s0016774600000056 2024-02-08T08:31:50Z Abstract From Albian, Santonian and Campanian strata in south-central Sakhalin, four echinoid taxa are described, illustrated and discussed. In Far East Russia, echinoids are rare constituents amongst mid- and Late Cretaceous macrofaunal assemblages in which inoceramid and non-inoceramid bivalves, plus heteromorph and non-heteromorph ammonites predominate. The sole regular species in the present lot is represented by an incomplete external mould of a primary spine of a rhabdocidarid, Polycidaris (?) sp., from the lower Campanian. Irregular taxa include a fragmentary, specifically indeterminate ‘pygurid’, Echinopygus (?) sp., of late Albian age, as well as two spatangoids. One of these, a toxasterid of late Campanian age, is assigned to Niponaster cf. hokkaidensis (Lambert in Lambert & Thiéry, 1924). The other is a new hemiasterid with a semi-ethmophract apical disc, a peripetalous fasciole with diffuse boundaries (parafasciole) and posterior petals that are near-equal in length to anterior ones, from lowermost Campanian strata. For this, the name Palhemiaster natalyae n. sp. is introduced. Comparisons with coeval echinoid faunas from nearby Hokkaido (northern Japan) are hampered by the generally poor preservation of the latter. However, with the exception of Niponaster cf. hokkaidensis , none of the forms recorded in the present paper appears to be represented in those Japanese assemblages. Article in Journal/Newspaper Sakhalin Cambridge University Press Netherlands Journal of Geosciences - Geologie en Mijnbouw 92 2-3 123 132 |
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Cambridge University Press |
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English |
topic |
Geology |
spellingShingle |
Geology Jagt, J.W.M. Jagt-Yazykova, E.A. Zonova, T.D. Notes on selected Cretaceous echinoids from south-central Sakhalin, Far East Russia |
topic_facet |
Geology |
description |
Abstract From Albian, Santonian and Campanian strata in south-central Sakhalin, four echinoid taxa are described, illustrated and discussed. In Far East Russia, echinoids are rare constituents amongst mid- and Late Cretaceous macrofaunal assemblages in which inoceramid and non-inoceramid bivalves, plus heteromorph and non-heteromorph ammonites predominate. The sole regular species in the present lot is represented by an incomplete external mould of a primary spine of a rhabdocidarid, Polycidaris (?) sp., from the lower Campanian. Irregular taxa include a fragmentary, specifically indeterminate ‘pygurid’, Echinopygus (?) sp., of late Albian age, as well as two spatangoids. One of these, a toxasterid of late Campanian age, is assigned to Niponaster cf. hokkaidensis (Lambert in Lambert & Thiéry, 1924). The other is a new hemiasterid with a semi-ethmophract apical disc, a peripetalous fasciole with diffuse boundaries (parafasciole) and posterior petals that are near-equal in length to anterior ones, from lowermost Campanian strata. For this, the name Palhemiaster natalyae n. sp. is introduced. Comparisons with coeval echinoid faunas from nearby Hokkaido (northern Japan) are hampered by the generally poor preservation of the latter. However, with the exception of Niponaster cf. hokkaidensis , none of the forms recorded in the present paper appears to be represented in those Japanese assemblages. |
format |
Article in Journal/Newspaper |
author |
Jagt, J.W.M. Jagt-Yazykova, E.A. Zonova, T.D. |
author_facet |
Jagt, J.W.M. Jagt-Yazykova, E.A. Zonova, T.D. |
author_sort |
Jagt, J.W.M. |
title |
Notes on selected Cretaceous echinoids from south-central Sakhalin, Far East Russia |
title_short |
Notes on selected Cretaceous echinoids from south-central Sakhalin, Far East Russia |
title_full |
Notes on selected Cretaceous echinoids from south-central Sakhalin, Far East Russia |
title_fullStr |
Notes on selected Cretaceous echinoids from south-central Sakhalin, Far East Russia |
title_full_unstemmed |
Notes on selected Cretaceous echinoids from south-central Sakhalin, Far East Russia |
title_sort |
notes on selected cretaceous echinoids from south-central sakhalin, far east russia |
publisher |
Cambridge University Press (CUP) |
publishDate |
2013 |
url |
http://dx.doi.org/10.1017/s0016774600000056 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0016774600000056 |
genre |
Sakhalin |
genre_facet |
Sakhalin |
op_source |
Netherlands Journal of Geosciences - Geologie en Mijnbouw volume 92, issue 2-3, page 123-132 ISSN 0016-7746 1573-9708 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0016774600000056 |
container_title |
Netherlands Journal of Geosciences - Geologie en Mijnbouw |
container_volume |
92 |
container_issue |
2-3 |
container_start_page |
123 |
op_container_end_page |
132 |
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1792505426999246848 |