Cenozoic fossil fishes of the extinct alepisauroid family Polymerichthyidae from the Sakhalin Island, Russia
Five incomplete skeletons of fishes of the extinct monotypic family Polymerichthyidae (Aulopiformes: Alepisauroidei) from the Paleogene and Neogene of Sakhalin Island, Russia, are identified as Polymerichthys sp., described in detail, and compared with known representatives of the family. The result...
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ftdoajarticles:oai:doaj.org/article:bff4f28885c24ed6944f704dcc783719 2023-05-15T18:08:41+02:00 Cenozoic fossil fishes of the extinct alepisauroid family Polymerichthyidae from the Sakhalin Island, Russia Mikhail V. Nazarkin 2016-12-01T00:00:00Z https://doi.org/10.4202/app.00247.2016 https://doaj.org/article/bff4f28885c24ed6944f704dcc783719 EN eng Institute of Paleobiology PAS http://www.app.pan.pl/archive/published/app61/app002472016.pdf https://doaj.org/toc/0567-7920 https://doaj.org/toc/1732-2421 doi:10.4202/app.00247.2016 0567-7920 1732-2421 https://doaj.org/article/bff4f28885c24ed6944f704dcc783719 Acta Palaeontologica Polonica, Vol 61, Iss 4, Pp 829-838 (2016) Teleostei Aulopiformes Polymerichthys morphological analysis systematics Tertiary Russia Sakhalin Fossil man. Human paleontology GN282-286.7 Paleontology QE701-760 article 2016 ftdoajarticles https://doi.org/10.4202/app.00247.2016 2022-12-31T01:07:12Z Five incomplete skeletons of fishes of the extinct monotypic family Polymerichthyidae (Aulopiformes: Alepisauroidei) from the Paleogene and Neogene of Sakhalin Island, Russia, are identified as Polymerichthys sp., described in detail, and compared with known representatives of the family. The results of this study suggest that polymerichthyids were characterized by a prolonged rostrum, behind which the upper jaw symphysis was placed; by an anal fin without spinules, contrary to what was assumed earlier; and, probably, by sexual dimorphism. Morphological analysis reveals the closest relationships of Polymerichthyidae to be with Recent Alepisauridae, but their taxonomic position is still unresolved. The new material is the second occurrence of articulated skeleton of fishes of this family. The new findings from Sakhalin expand the known geographical distribution of Pacific polymerichthyids by about 12° of latitude, and extend the time interval for this family to as early as the late Oligocene. Article in Journal/Newspaper Sakhalin Directory of Open Access Journals: DOAJ Articles Pacific Acta Palaeontologica Polonica 61 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Teleostei Aulopiformes Polymerichthys morphological analysis systematics Tertiary Russia Sakhalin Fossil man. Human paleontology GN282-286.7 Paleontology QE701-760 |
spellingShingle |
Teleostei Aulopiformes Polymerichthys morphological analysis systematics Tertiary Russia Sakhalin Fossil man. Human paleontology GN282-286.7 Paleontology QE701-760 Mikhail V. Nazarkin Cenozoic fossil fishes of the extinct alepisauroid family Polymerichthyidae from the Sakhalin Island, Russia |
topic_facet |
Teleostei Aulopiformes Polymerichthys morphological analysis systematics Tertiary Russia Sakhalin Fossil man. Human paleontology GN282-286.7 Paleontology QE701-760 |
description |
Five incomplete skeletons of fishes of the extinct monotypic family Polymerichthyidae (Aulopiformes: Alepisauroidei) from the Paleogene and Neogene of Sakhalin Island, Russia, are identified as Polymerichthys sp., described in detail, and compared with known representatives of the family. The results of this study suggest that polymerichthyids were characterized by a prolonged rostrum, behind which the upper jaw symphysis was placed; by an anal fin without spinules, contrary to what was assumed earlier; and, probably, by sexual dimorphism. Morphological analysis reveals the closest relationships of Polymerichthyidae to be with Recent Alepisauridae, but their taxonomic position is still unresolved. The new material is the second occurrence of articulated skeleton of fishes of this family. The new findings from Sakhalin expand the known geographical distribution of Pacific polymerichthyids by about 12° of latitude, and extend the time interval for this family to as early as the late Oligocene. |
format |
Article in Journal/Newspaper |
author |
Mikhail V. Nazarkin |
author_facet |
Mikhail V. Nazarkin |
author_sort |
Mikhail V. Nazarkin |
title |
Cenozoic fossil fishes of the extinct alepisauroid family Polymerichthyidae from the Sakhalin Island, Russia |
title_short |
Cenozoic fossil fishes of the extinct alepisauroid family Polymerichthyidae from the Sakhalin Island, Russia |
title_full |
Cenozoic fossil fishes of the extinct alepisauroid family Polymerichthyidae from the Sakhalin Island, Russia |
title_fullStr |
Cenozoic fossil fishes of the extinct alepisauroid family Polymerichthyidae from the Sakhalin Island, Russia |
title_full_unstemmed |
Cenozoic fossil fishes of the extinct alepisauroid family Polymerichthyidae from the Sakhalin Island, Russia |
title_sort |
cenozoic fossil fishes of the extinct alepisauroid family polymerichthyidae from the sakhalin island, russia |
publisher |
Institute of Paleobiology PAS |
publishDate |
2016 |
url |
https://doi.org/10.4202/app.00247.2016 https://doaj.org/article/bff4f28885c24ed6944f704dcc783719 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Sakhalin |
genre_facet |
Sakhalin |
op_source |
Acta Palaeontologica Polonica, Vol 61, Iss 4, Pp 829-838 (2016) |
op_relation |
http://www.app.pan.pl/archive/published/app61/app002472016.pdf https://doaj.org/toc/0567-7920 https://doaj.org/toc/1732-2421 doi:10.4202/app.00247.2016 0567-7920 1732-2421 https://doaj.org/article/bff4f28885c24ed6944f704dcc783719 |
op_doi |
https://doi.org/10.4202/app.00247.2016 |
container_title |
Acta Palaeontologica Polonica |
container_volume |
61 |
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1766181002180296704 |