Systematic position and variability of the Devonian nautiloids Hercoceras and Ptenoceras from the Prague Basin (Czech Republic).

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00023272%3A_____%2F07%3A%230000334" target="_blank" >RIV/00023272:_____/07:#0000334 - isvavai.cz</a>

Alternative codes found

RIV/00023272:_____/07:#0000402

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Systematic position and variability of the Devonian nautiloids Hercoceras and Ptenoceras from the Prague Basin (Czech Republic).

Original language description

The Devonian nautiloids Hercoceras Barrande, 1865 and Ptenoceras Hyatt, 1894 are closely related and should be classified within the single oncocerid family of Hercoceratidae Hyatt, 1884, which has priority before the family Ptenoceratidae Teichert, 1939. This is supported particularly by the similarity of their embryonic shell and by the character and ontogeny of ventrolateral outgrowths. The intraspecific variability of shells in Hercoceras mirum Barrande, 1865 (Lower Devonian, Prague Basin, Czech Republic) is striking and unusual among nautiloids. The variability in Ptenoceras alatum (Barrande, 1865) is also high, demonstrating fluent transitions between individual morphotypes. Therefore, the other two species of this genus described from the Pragian Stage of the Prague Basin, Ptenoceras modicum (Barrande, 1877) and Ptenoceras barrandei Zhuravleva, 1974 should be assigned to the single species Ptenoceras alatum.

Czech name

Systematika a variabilita devonských nautiloidů Hercoceras a Ptenoceras z Pražské pánve (Česká republika)

Czech description

Devonští nautiloidi Hercoceras Barrande, 1865 a Ptenoceras Hyatt, 1894 jsou blízce příbuzní a měli by být řazeni do jedné čeledi Hercoceratidae Hyatt, 1884, která má prioritu před čeledí Ptenoceratidae Teicher, 1939. To je podpořeno zejména podobností jejich embryonálních schránek a charakterem a ontogenezí ventrolaterálních výrůstků. Vnitrodruhová variabilita schránky druhu Hercoceras mirum Barrande, 1865 (spodní devon, Pražská pánev, Česká Republika) je pozoruhodná a neobvyklá mezi nautiloidy. Variabilita u druhu Ptenoceras alatum (Barrande, 1865) je také vysoká a je demonstrována plynulým přechodem mezi jednotlivými morfotypy. Proto by dva další druhy tohoto rodu, popsané z Pragu Pražské pánve, Ptenoceras modicum (Barrande, 1877) a Ptenoceras barrandei Zhuravleva, 1974 měly být zařazeni do jediného druhu Ptenoceras alatum.

Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

DB - Geology and mineralogy

OECD FORD branch

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Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

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

Publication year

2007

Confidentiality

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

Name of the periodical

Bulletin of Geosciences

ISSN

1214-1119

e-ISSN

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Volume of the periodical

82

Issue of the periodical within the volume

1

Country of publishing house

CZ - CZECH REPUBLIC

Number of pages

10

Pages from-to

1-10

UT code for WoS article

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EID of the result in the Scopus database

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