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Statements

Subject Item
n2:RIV%2F00216208%3A11310%2F13%3A10173779%21RIV14-MSM-11310___
rdf:type
n7:Vysledek skos:Concept
rdfs:seeAlso
http://dx.doi.org/10.3140/bull.geosci.1329
dcterms:description
The preservation of digestive structures of trilobites is extremely rare. Here we describe two new examples of trilobites from the Upper Ordovician Letná Formation (Prague Basin, Czech Republic), which display remains of the digestive system. The first specimen, assigned to Selenopeltis buchi (Barrande, 1846), exhibits cavities under the posterior part of the glabella and the axis of most thoracic segments. These cavities are interpreted as remains of metamerically paired digestive caeca and constitute the first example of preserved digestive structures in the order Odontopleurida. The second specimen belongs to Birmanites ingens (Barrande, 1852) and displays a tube-like structure, filled with a finely-grained material, that runs under the axial lobe of the entire trunk. We interpret this structure as a gut infilling similar to that repeatedly observed in the Moroccan Basilicus calzadai. These specimens confirm that the depositional environment of the Letná Formation was locally favourable to soft-tissue preservation. They also further document the presence of two different types of digestive systems in trilobites. The possibility that different processes might have been involved in the preservation of different parts of the trilobite gut is discussed, and several criteria to differentiate genuine gut remains from scavenger burrows are proposed. The preservation of digestive structures of trilobites is extremely rare. Here we describe two new examples of trilobites from the Upper Ordovician Letná Formation (Prague Basin, Czech Republic), which display remains of the digestive system. The first specimen, assigned to Selenopeltis buchi (Barrande, 1846), exhibits cavities under the posterior part of the glabella and the axis of most thoracic segments. These cavities are interpreted as remains of metamerically paired digestive caeca and constitute the first example of preserved digestive structures in the order Odontopleurida. The second specimen belongs to Birmanites ingens (Barrande, 1852) and displays a tube-like structure, filled with a finely-grained material, that runs under the axial lobe of the entire trunk. We interpret this structure as a gut infilling similar to that repeatedly observed in the Moroccan Basilicus calzadai. These specimens confirm that the depositional environment of the Letná Formation was locally favourable to soft-tissue preservation. They also further document the presence of two different types of digestive systems in trilobites. The possibility that different processes might have been involved in the preservation of different parts of the trilobite gut is discussed, and several criteria to differentiate genuine gut remains from scavenger burrows are proposed.
dcterms:title
Fossilised guts in trilobites from the Upper Ordovician Letná Formation (Prague Basin, Czech Republic) Fossilised guts in trilobites from the Upper Ordovician Letná Formation (Prague Basin, Czech Republic)
skos:prefLabel
Fossilised guts in trilobites from the Upper Ordovician Letná Formation (Prague Basin, Czech Republic) Fossilised guts in trilobites from the Upper Ordovician Letná Formation (Prague Basin, Czech Republic)
skos:notation
RIV/00216208:11310/13:10173779!RIV14-MSM-11310___
n7:predkladatel
n8:orjk%3A11310
n4:aktivita
n12:Z n12:P n12:I
n4:aktivity
I, P(IAA301110908), Z(MSM0021620855)
n4:cisloPeriodika
1
n4:dodaniDat
n11:2014
n4:domaciTvurceVysledku
n14:2327988 n14:9821120
n4:druhVysledku
n17:J
n4:duvernostUdaju
n13:S
n4:entitaPredkladatele
n9:predkladatel
n4:idSjednocenehoVysledku
75580
n4:idVysledku
RIV/00216208:11310/13:10173779
n4:jazykVysledku
n20:eng
n4:klicovaSlova
Czech Republic; Upper Ordovician; Letná Formation; soft-tissue preservation; digestive system; trilobites
n4:klicoveSlovo
n5:Czech%20Republic n5:digestive%20system n5:soft-tissue%20preservation n5:Upper%20Ordovician n5:Letn%C3%A1%20Formation n5:trilobites
n4:kodStatuVydavatele
CZ - Česká republika
n4:kontrolniKodProRIV
[E380C625AD66]
n4:nazevZdroje
Bulletin of Geosciences
n4:obor
n19:DB
n4:pocetDomacichTvurcuVysledku
2
n4:pocetTvurcuVysledku
4
n4:projekt
n18:IAA301110908
n4:rokUplatneniVysledku
n11:2013
n4:svazekPeriodika
88
n4:tvurceVysledku
Rak, Štěpán Lerosey-Aubril, Rudy Fatka, Oldřich Budil, Petr
n4:wos
000312080100008
n4:zamer
n22:MSM0021620855
s:issn
1214-1119
s:numberOfPages
10
n16:doi
10.3140/bull.geosci.1329
n15:organizacniJednotka
11310