Minute Silurian oncocerid nautiloids with unusual colour patterns

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00025798%3A_____%2F09%3A00000148" target="_blank" >RIV/00025798:_____/09:00000148 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00023272:_____/09:#0001101

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Minute Silurian oncocerid nautiloids with unusual colour patterns

Popis výsledku v původním jazyce

A minute Silurian oncocerid Cyrtoceras pollux, from Bohemia is assigned here to the genus Pomerantsoceras. The only so far known species of this genus comes from Ordovician of Estonia. Pomerantsoceras thus represents, except for un-revised poorly understood taxa, the single known oncocerid genus surviving the end-Ordovician extinction events. Colour pattern characterised by a few longitudinal bands on the entire circumference of the shell is here reported in oncocerids. Longicone and only slightly curved small shells as in Pomerantsoceras are unusual among nautiloids and resemble straight shells of orthocerids and pseudorthocerids, in which the colour pattern consists of straight colour bands. Consequently the shell shape as well as the colour patternshould be regarded as adaptive convergence with orthocerids and pseudorthocerids. It supports the hypothesis that colour pattern functioned as camouflage and its evolution was under adaptive control.

Název v anglickém jazyce

Minute Silurian oncocerid nautiloids with unusual colour patterns

Popis výsledku anglicky

A minute Silurian oncocerid Cyrtoceras pollux, from Bohemia is assigned here to the genus Pomerantsoceras. The only so far known species of this genus comes from Ordovician of Estonia. Pomerantsoceras thus represents, except for un-revised poorly understood taxa, the single known oncocerid genus surviving the end-Ordovician extinction events. Colour pattern characterised by a few longitudinal bands on the entire circumference of the shell is here reported in oncocerids. Longicone and only slightly curved small shells as in Pomerantsoceras are unusual among nautiloids and resemble straight shells of orthocerids and pseudorthocerids, in which the colour pattern consists of straight colour bands. Consequently the shell shape as well as the colour patternshould be regarded as adaptive convergence with orthocerids and pseudorthocerids. It supports the hypothesis that colour pattern functioned as camouflage and its evolution was under adaptive control.

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

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2009

Kód důvěrnosti údajů

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

Název periodika

Acta Palaeontologica Polonica

ISSN

0567-7920

e-ISSN

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Svazek periodika

54

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

PL - Polská republika

Počet stran výsledku

10

Strana od-do

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Kód UT WoS článku

000270574400013

EID výsledku v databázi Scopus

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