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Statements

Subject Item
n2:RIV%2F00216208%3A11310%2F13%3A10174003%21RIV14-MSM-11310___
rdf:type
skos:Concept n9:Vysledek
dcterms:description
New coleoid cephalopods, assignable to the order Sepiida, are recorded from the Selandian/Thanetian boundary interval (Middle to Upper Paleocene transition, c. 59.2 Ma) along the southeastern margin (Toshka Lakes) of the Western Desert in Egypt. The two genera recognised, Aegyptosaepia n. gen. and ?Anomalosaepia Weaver and Ciampaglio, are placed in the families Belosaepiidae and ?Anomalosaepiidae, respectively. They constitute the oldest record to date of sepiids with a 'rostrum-like' prong. In addition, a third, generically and specifically indeterminate coleoid is represented by a single rostrum-like find. The taxonomic assignment of the material is based on apical parts (as preserved), i.e., guard, apical prong (or 'rostrum-like' structure), phragmocone and (remains of) protoconch, plus shell mineralogy. We here confirm the shell of early sepiids to have been bimineralic, i.e., composed of both calcite and aragonite. Aegyptosaepia lugeri n. gen., n. sp. reveals some similarities to later species of Belosaepia, in particular the possession of a distinct prong. General features of the phragmocone and protoconch of the new form are similar to both Belocurta (Middle Danian [Lower Paleocene]) and Belosaepia (Eocene). However, breviconic coiling and the presence of a longer ventral conotheca indicate closer ties with late Maastrichtian-Middle Danian Ceratisepia. In this respect, Aegyptosaepia n. gen. constitutes a link between Ceratisepia and the Eocene Belosaepia. The occurrence of the new genus near the Selandian/Thanetian boundary suggests an earlier origin of belosaepiids, during the early to Middle Paleocene. These earliest known belosaepiids may have originated in the Tethyan Realm. From northeast Africa, they subsequently spread to western India, the Arabian Plate and, probably via the Mediterranean region, to Europe and North America. New coleoid cephalopods, assignable to the order Sepiida, are recorded from the Selandian/Thanetian boundary interval (Middle to Upper Paleocene transition, c. 59.2 Ma) along the southeastern margin (Toshka Lakes) of the Western Desert in Egypt. The two genera recognised, Aegyptosaepia n. gen. and ?Anomalosaepia Weaver and Ciampaglio, are placed in the families Belosaepiidae and ?Anomalosaepiidae, respectively. They constitute the oldest record to date of sepiids with a 'rostrum-like' prong. In addition, a third, generically and specifically indeterminate coleoid is represented by a single rostrum-like find. The taxonomic assignment of the material is based on apical parts (as preserved), i.e., guard, apical prong (or 'rostrum-like' structure), phragmocone and (remains of) protoconch, plus shell mineralogy. We here confirm the shell of early sepiids to have been bimineralic, i.e., composed of both calcite and aragonite. Aegyptosaepia lugeri n. gen., n. sp. reveals some similarities to later species of Belosaepia, in particular the possession of a distinct prong. General features of the phragmocone and protoconch of the new form are similar to both Belocurta (Middle Danian [Lower Paleocene]) and Belosaepia (Eocene). However, breviconic coiling and the presence of a longer ventral conotheca indicate closer ties with late Maastrichtian-Middle Danian Ceratisepia. In this respect, Aegyptosaepia n. gen. constitutes a link between Ceratisepia and the Eocene Belosaepia. The occurrence of the new genus near the Selandian/Thanetian boundary suggests an earlier origin of belosaepiids, during the early to Middle Paleocene. These earliest known belosaepiids may have originated in the Tethyan Realm. From northeast Africa, they subsequently spread to western India, the Arabian Plate and, probably via the Mediterranean region, to Europe and North America.
dcterms:title
New Paleocene Sepiid Coleoids (Cephalopoda) from Egypt: Evolutionary Significance and Origin of the Sepiid 'Rostrum' New Paleocene Sepiid Coleoids (Cephalopoda) from Egypt: Evolutionary Significance and Origin of the Sepiid 'Rostrum'
skos:prefLabel
New Paleocene Sepiid Coleoids (Cephalopoda) from Egypt: Evolutionary Significance and Origin of the Sepiid 'Rostrum' New Paleocene Sepiid Coleoids (Cephalopoda) from Egypt: Evolutionary Significance and Origin of the Sepiid 'Rostrum'
skos:notation
RIV/00216208:11310/13:10174003!RIV14-MSM-11310___
n9:predkladatel
n19:orjk%3A11310
n3:aktivita
n8:Z n8:I
n3:aktivity
I, Z(MSM0021620855)
n3:cisloPeriodika
11
n3:dodaniDat
n18:2014
n3:domaciTvurceVysledku
n4:9010440
n3:druhVysledku
n14:J
n3:duvernostUdaju
n7:S
n3:entitaPredkladatele
n6:predkladatel
n3:idSjednocenehoVysledku
91644
n3:idVysledku
RIV/00216208:11310/13:10174003
n3:jazykVysledku
n13:eng
n3:klicovaSlova
Egypt; Paleocene; Sepiida; coleoid cephalopods
n3:klicoveSlovo
n10:Sepiida n10:Egypt n10:Paleocene n10:coleoid%20cephalopods
n3:kodStatuVydavatele
US - Spojené státy americké
n3:kontrolniKodProRIV
[F47E52E07783]
n3:nazevZdroje
PLoS ONE
n3:obor
n16:DB
n3:pocetDomacichTvurcuVysledku
1
n3:pocetTvurcuVysledku
5
n3:rokUplatneniVysledku
n18:2013
n3:svazekPeriodika
8
n3:tvurceVysledku
Stassen, Peter Jagt, John W. M. Speijer, Robert P. Steurbaut, Etienne Košťák, Martin
n3:wos
000327539800108
n3:zamer
n11:MSM0021620855
s:issn
1932-6203
s:numberOfPages
19
n15:doi
10.1371/journal.pone.0081180
n20:organizacniJednotka
11310