New Silurian murchisoniid gastropods from Alaska and a review of the genus Coelocaulus

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00025798%3A_____%2F03%3A00000027" target="_blank" >RIV/00025798:_____/03:00000027 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

New Silurian murchisoniid gastropods from Alaska and a review of the genus Coelocaulus

Popis výsledku v původním jazyce

Coelocaulus karlae n. sp. and Medfracaulus cooki n. gen., n. sp. are described from the Silurian of west-central and southeastern Alaska respectively. Coelocaulus is redefined to limit the content to selenizone-bearing murchisoniids with a deep, straight-walled umbilicus and without a columellar flange. The presence of a deep umbilicus in high-spired shells cannot be used alone as a diagnostic character of Coelocaulus, as on this basis many other non-murchisoniid species (mainly based on steinkerns) have erroneously been attributed to the genus. Establishment and recognition of these unusually large, deeply umbilicate murchisoniid shells is important for the Silurian biostratigraphy of Alaskan terranes. Both genera are abundant and are characteristic of Upper Silurian strata of west-central Alaska. Similar morphotypes are unknown from rocks located undoubtedly on the North American continent (Laurentia) during the Late Silurian.

Název v anglickém jazyce

New Silurian murchisoniid gastropods from Alaska and a review of the genus Coelocaulus

Popis výsledku anglicky

Coelocaulus karlae n. sp. and Medfracaulus cooki n. gen., n. sp. are described from the Silurian of west-central and southeastern Alaska respectively. Coelocaulus is redefined to limit the content to selenizone-bearing murchisoniids with a deep, straight-walled umbilicus and without a columellar flange. The presence of a deep umbilicus in high-spired shells cannot be used alone as a diagnostic character of Coelocaulus, as on this basis many other non-murchisoniid species (mainly based on steinkerns) have erroneously been attributed to the genus. Establishment and recognition of these unusually large, deeply umbilicate murchisoniid shells is important for the Silurian biostratigraphy of Alaskan terranes. Both genera are abundant and are characteristic of Upper Silurian strata of west-central Alaska. Similar morphotypes are unknown from rocks located undoubtedly on the North American continent (Laurentia) during the Late Silurian.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

DB - Geologie a mineralogie

OECD FORD obor

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Projekt

<a href="/cs/project/GA205%2F01%2F0143" target="_blank" >GA205/01/0143: Evoluce, systematika a paleobiogegrafické vztahy devonských gastropodů pražské pánve (Čechy) a Farewell terrane (Aljaška)</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2003

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Short Notes on Alaska Geology

ISSN

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e-ISSN

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Svazek periodika

120

Číslo periodika v rámci svazku

October

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

8

Strana od-do

87-93

Kód UT WoS článku

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EID výsledku v databázi Scopus

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