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Statements

Subject Item
n2:RIV%2F00023272%3A_____%2F07%3A%230000334%21RIV08-MK0-00023272
rdf:type
n11:Vysledek skos:Concept
dcterms: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. 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. 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.
dcterms:title
Systematic position and variability of the Devonian nautiloids Hercoceras and Ptenoceras from the Prague Basin (Czech Republic). Systematika a variabilita devonských nautiloidů Hercoceras a Ptenoceras z Pražské pánve (Česká republika) Systematic position and variability of the Devonian nautiloids Hercoceras and Ptenoceras from the Prague Basin (Czech Republic).
skos:prefLabel
Systematic position and variability of the Devonian nautiloids Hercoceras and Ptenoceras from the Prague Basin (Czech Republic). Systematic position and variability of the Devonian nautiloids Hercoceras and Ptenoceras from the Prague Basin (Czech Republic). Systematika a variabilita devonských nautiloidů Hercoceras a Ptenoceras z Pražské pánve (Česká republika)
skos:notation
RIV/00023272:_____/07:#0000334!RIV08-MK0-00023272
n3:strany
1;10
n3:aktivita
n17:P
n3:aktivity
P(DE06P04OMG009), P(GA205/05/0875)
n3:cisloPeriodika
1
n3:dodaniDat
n4:2008
n3:domaciTvurceVysledku
n15:1089153
n3:druhVysledku
n8:J
n3:duvernostUdaju
n14:S
n3:entitaPredkladatele
n5:predkladatel
n3:idSjednocenehoVysledku
454056
n3:idVysledku
RIV/00023272:_____/07:#0000334
n3:jazykVysledku
n6:eng
n3:klicovaSlova
Cephalopoda; Nautiloidea; taxonomy; variability; Barrandian; Lower Devonian
n3:klicoveSlovo
n10:Lower%20Devonian n10:taxonomy n10:variability n10:Barrandian n10:Nautiloidea n10:Cephalopoda
n3:kodStatuVydavatele
CZ - Česká republika
n3:kontrolniKodProRIV
[E371E72F1EA3]
n3:nazevZdroje
Bulletin of Geosciences
n3:obor
n16:DB
n3:pocetDomacichTvurcuVysledku
1
n3:pocetTvurcuVysledku
1
n3:projekt
n13:GA205%2F05%2F0875 n13:DE06P04OMG009
n3:rokUplatneniVysledku
n4:2007
n3:svazekPeriodika
82
n3:tvurceVysledku
Turek, Vojtěch
s:issn
1214-1119
s:numberOfPages
10