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Dietary and environmental implications of Early Cretaceous predatory dinosaur coprolites from Teruel, Spain

Vajda, Vivi LU ; Pesquero Fernández, M. Dolores; Villanueva-Amadoz, Uxue; Lehsten, Veiko LU and Alcalá, Luis (2015) In Palaeogeography, Palaeoclimatology, Palaeoecology
Abstract

Coprolites from the Early Cretaceous vertebrate bone-bed at Ariño in Teruel, Spain, were analyzed geochemically and palynologically. They contain various inclusions, such as small bone fragments, abundant plant remains, pollen, and spores. We attribute the coprolites to carnivorous dinosaurs based partly on their morphology together with the presence of bone fragments, and a high content of calcium phosphate (hydroxylapatite) with calcite. Well-preserved pollen and spore assemblages were identified in all coprolite samples and a slightly poorer assemblage was obtained from the adjacent sediments, both indicating an Early Cretaceous (Albian) age. This shows that the coprolites are in situ and also confirms previous age determinations for... (More)

Coprolites from the Early Cretaceous vertebrate bone-bed at Ariño in Teruel, Spain, were analyzed geochemically and palynologically. They contain various inclusions, such as small bone fragments, abundant plant remains, pollen, and spores. We attribute the coprolites to carnivorous dinosaurs based partly on their morphology together with the presence of bone fragments, and a high content of calcium phosphate (hydroxylapatite) with calcite. Well-preserved pollen and spore assemblages were identified in all coprolite samples and a slightly poorer assemblage was obtained from the adjacent sediments, both indicating an Early Cretaceous (Albian) age. This shows that the coprolites are in situ and also confirms previous age determinations for the host strata. The depositional environment is interpreted as a continental wetland based on the palynoflora, which includes several hydrophilic taxa, together with sparse occurrences of fresh-water algae, such as Ovoidites, and the absence of marine palynomorphs.Although the coprolites of Ariño samples generally are dominated by pollen produced by Taxodiaceae (cypress) and Cheirolepidiaceae (a family of extinct conifers), the sediment samples have a slightly higher relative abundance of fern spores. The distribution of major organic components varies between the coprolite and sediment samples, which is manifest by the considerably higher charcoal percentage within the coprolites. The high quantities of charcoal might be explained by a ground-dwelling species, feeding on smaller vertebrates that complemented its diet with plant material from a paleoenvironment were wild fires were a part of the ecosystem. The state of preservation of the spores and pollen is also more detailed in the coprolites, suggesting that encasement in calcium phosphate may inhibit degradation of sporopollenin.

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author
organization
publishing date
type
Contribution to journal
publication status
epub
subject
keywords
Charcoal, Coprolite, Cretaceous, Palynology, Teruel, Wild fires
in
Palaeogeography, Palaeoclimatology, Palaeoecology
publisher
Elsevier
external identifiers
  • Scopus:84961223497
ISSN
0031-0182
DOI
10.1016/j.palaeo.2016.02.036
language
English
LU publication?
yes
id
509c7635-8c67-41ab-bbe9-7f93803d6b7c
date added to LUP
2016-09-22 12:15:49
date last changed
2016-11-27 04:42:54
@misc{509c7635-8c67-41ab-bbe9-7f93803d6b7c,
  abstract     = {<p>Coprolites from the Early Cretaceous vertebrate bone-bed at Ariño in Teruel, Spain, were analyzed geochemically and palynologically. They contain various inclusions, such as small bone fragments, abundant plant remains, pollen, and spores. We attribute the coprolites to carnivorous dinosaurs based partly on their morphology together with the presence of bone fragments, and a high content of calcium phosphate (hydroxylapatite) with calcite. Well-preserved pollen and spore assemblages were identified in all coprolite samples and a slightly poorer assemblage was obtained from the adjacent sediments, both indicating an Early Cretaceous (Albian) age. This shows that the coprolites are in situ and also confirms previous age determinations for the host strata. The depositional environment is interpreted as a continental wetland based on the palynoflora, which includes several hydrophilic taxa, together with sparse occurrences of fresh-water algae, such as Ovoidites, and the absence of marine palynomorphs.Although the coprolites of Ariño samples generally are dominated by pollen produced by Taxodiaceae (cypress) and Cheirolepidiaceae (a family of extinct conifers), the sediment samples have a slightly higher relative abundance of fern spores. The distribution of major organic components varies between the coprolite and sediment samples, which is manifest by the considerably higher charcoal percentage within the coprolites. The high quantities of charcoal might be explained by a ground-dwelling species, feeding on smaller vertebrates that complemented its diet with plant material from a paleoenvironment were wild fires were a part of the ecosystem. The state of preservation of the spores and pollen is also more detailed in the coprolites, suggesting that encasement in calcium phosphate may inhibit degradation of sporopollenin.</p>},
  author       = {Vajda, Vivi and Pesquero Fernández, M. Dolores and Villanueva-Amadoz, Uxue and Lehsten, Veiko and Alcalá, Luis},
  issn         = {0031-0182},
  keyword      = {Charcoal,Coprolite,Cretaceous,Palynology,Teruel,Wild fires},
  language     = {eng},
  month        = {11},
  publisher    = {ARRAY(0x98b40f0)},
  series       = {Palaeogeography, Palaeoclimatology, Palaeoecology},
  title        = {Dietary and environmental implications of Early Cretaceous predatory dinosaur coprolites from Teruel, Spain},
  url          = {http://dx.doi.org/10.1016/j.palaeo.2016.02.036},
  year         = {2015},
}