Durophagous predation on scaphitid ammonoids in the Late Cretaceous Western Interior Seaway of North America

Takeda, Yusuke; Tanabe, Kazushige; Sasaki, Takenori; Landman, Neil H.

doi:10.1111/let.12130

Cited by 14 publications

(13 citation statements)

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“…Predation indicators, such as healed injuries, are present on 5% of scaphite specimens (Fig. 1); a similar incidence of predation as observed in other scaphite accumulations interpreted as in situ (21). Although it is more challenging to determine sex in baculites than in scaphites, for those baculite specimens where this assignment could be made, the proportion of males and females is equal.…”

Section: Resultsmentioning

confidence: 83%

Ammonite habitat revealed via isotopic composition and comparisons with co-occurring benthic and planktonic organisms

Sessa

Larina

Knoll

et al. 2015

Proc. Natl. Acad. Sci. U.S.A.

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Ammonites are among the best-known fossils of the Phanerozoic, yet their habitat is poorly understood. Three common ammonite families (Baculitidae, Scaphitidae, and Sphenodiscidae) co-occur with wellpreserved planktonic and benthic organisms at the type locality of the upper Maastrichtian Owl Creek Formation, offering an excellent opportunity to constrain their depth habitats through isotopic comparisons among taxa. Based on sedimentary evidence and the micro-and macrofauna at this site, we infer that the 9-m-thick sequence was deposited at a paleodepth of 70-150 m. Taxa present throughout the sequence include a diverse assemblage of ammonites, bivalves, and gastropods, abundant benthic foraminifera, and rare planktonic foraminifera. No stratigraphic trends are observed in the isotopic data of any taxon, and thus all of the data from each taxon are considered as replicates. Oxygen isotope-based temperature estimates from the baculites and scaphites overlap with those of the benthos and are distinct from those of the plankton. In contrast, sphenodiscid temperature estimates span a range that includes estimates of the planktonic foraminifera and of the warmer half of the benthic values. These results suggest baculites and scaphites lived close to the seafloor, whereas sphenodiscids sometimes inhabited the upper water column and/or lived closer to shore. In fact, the rarity and poorer preservation of the sphenodiscids relative to the baculites and scaphites suggests that the sphenodiscid shells may have only reached the Owl Creek locality by drifting seaward after death.A mmonites have constituted a primary data source for the fields of evolution, paleoceanography, biostratigraphy, and paleoecology for more than a century; their ubiquity, diversity, occurrence in a wide variety of marine environments, and readily preservable shell account for their utility in both paleontological and geological studies. Ammonites have been used extensively in studies of heterochrony because their shells preserve distinct ontogenetic changes that can be tracked in evolving lineages (1, 2); they are valued in paleoceanographic research because, like most mollusks, they are inferred to have precipitated their aragonitic shells in isotopic equilibrium with the surrounding seawater (3, 4). Thus, shell chemistry may record temperature, via oxygen isotopes (δ 18 O) (5), and water mass properties, such as strontium isotopes ( 87 Sr/ 86 Sr), which are used to estimate numerical age (6). Ammonites are also a textbook example of an index fossil; besides being abundant and widespread, they evolved rapidly, making them the dominant Mesozoic tool for relative dating and correlation of shallow water strata. For example, the 35-My-long stratigraphic record of Upper Cretaceous deposits in the US Western Interior Seaway (WIS) has been partitioned into 66 ammonite zones (7). Finally, ammonites underwent a spectacular extinction at the close of the Mesozoic. Explanations for why the ammonites, which were flourishing immediately before the Cretaceous-P...

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Section: Resultsmentioning

confidence: 83%

Ammonite habitat revealed via isotopic composition and comparisons with co-occurring benthic and planktonic organisms

Sessa

Larina

Knoll

et al. 2015

Proc. Natl. Acad. Sci. U.S.A.

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“…Radwański (1996) documented paired punctures that pierced the shells of latest Maastrichtian scaphitid ammonites and interpreted them as having been produced by predatory crabs. Similar traces of damage on scaphitids are not uncommon in the Upper Cretaceous of North America (Takeda et al, 2016). Externally inflicted injuries, indicated by repaired damage on mature shells, account for an average incidence of 10 per cent in Maastrichtian scaphitids from North America,…”

Section: Raninoidian Crabsmentioning

confidence: 72%

The rise of a novel, plankton-based marine ecosystem during the Mesozoic: a bottom-up model to explain new higher-tier invertebrate morphotypes

Fraaije¹,

Bakel²,

Jagt³

et al. 2018

BSGM

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Los mayores eventos de radiación de la microbiota que comprende el fitoplancton y zooplankton, con grupos como nanofósiles calcáreos, calpionélidos diatomeas, dinoflagelados, foraminíferos planctónicos y radiolarios, fueron característicos del intervalo de tiempo comprendido entre el Jurásico Tardío (c. 160 Ma) y el Cretácico Tardío (c. 100-66 Ma). Tanto de forma directa como indirecta, dichas radiaciones en la columna de agua marina llevaron a la proliferación de varios grupos bentónicos, tales como los cangrejos infaunales y nadadores, equinoideos irregulares, así como grupos nectónicos tales como los ammonites heteromorfos ancilocerátidos. Para cada grupo de invertebrados estudiado, hemos graficado todos los datos disponibles acerca de su diversidad a través del tiempo. Los histogramas resultantes constituyen la base para nuestro nuevo modelo de "relleno" de los ecosistemas del Mesozoico. El impacto sobre los detritófagos y planctotróficos fue directo a partir del Jurásico Tardío, ya que se dió un incremento de partículas nutritivas provenientes del plankton, de tal forma que la radiación de los cangrejos raninoides infaunales (que comprendía los más complejos carroñeros/detritívoros), estuvo íntimamente ligada a la explosión de (o parte de) su alimento (i.e., meiofauna marina). Durante el Periodo Cretácico, surgieron innovaciones y adaptaciones en torno a cambios en composición faunística. Por ejemplo, hubo una transición en los cangrejos rana (Raninoidia), entre el tipo palaeocorístido (vía el tipo liréidido), hacia el tipo ranínido. Otros cambios coetáneos se han documentado para equinoideos irregulares (i.e., de Toxasteridae, vía Micrasteridae, a Schizasteridae), y para ammonites heteromorfos, de Ancyloceratoidea, vía Turrilitoidea, a Scaphitoidea. Aquí se presenta, por vez primera, un elaborado modelo a detalle, con el fin de explicar el surgimiento y la dispersión en el tiempo, de diferentes grupos de invertebrados, en el rango de los más altos niveles tróficos.

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“…Similar to other Conchiferans, the outer shells of Cephalopods are thought to also function by protecting their soft parts against predators. Shell morphological studies have indicated that outer shell breakages caused by fatal and nonfatal predatory attacks were often found in various extant Nautilus (e.g., Tanabe, 1988) and extinct, shelled cephalopod fossils (e.g., Takeda and Tanabe, 2015; Takeda et al, 2016). Moreover, members of Cephalopods had developed swimming ability, which had assisted their radiation both horizontally and vertically in the ocean habitat, in contrast to the rest of the marine Mollusks, which are mostly benthic.…”

Section: Discussionmentioning

confidence: 99%

Hydrophilic Shell Matrix Proteins ofNautilus pompiliusand The Identification of a Core Set of Conchiferan Domains

Setiamarga

Hirota

Yoshida

et al. 2020

Preprint

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Despite being a member of the shelled mollusks (Conchiferans), most members of extant cephalopods have lost their external biomineralized shells, except for the Nautiloids. Here, we report the result of our study to identify major Shell Matrix Proteins and their domains in the Nautiloid Nautilus pompilius, in order to gain a general insight into the evolution of Conchiferan Shell Matrix Proteins. In order to do so, we conducted transcriptomics of the mantle, and proteomics of the shell of N. pompilius simultaneously. Analyses of obtained data identified 61 distinct shell-specific sequences. Of the successfully annotated 27 sequences, protein domains were predicted in 19. Comparative analysis of Nautilus sequences with four Conchiferans for which Shell Matrix Protein data were available (the pacific oyster, the pearl oyster, the limpet, and the Euhadra snail) revealed that three proteins and six domains of the shell proteins are conserved in all Conchiferans. Interestingly, when the terrestrial Euhadra snail was excluded, another five proteins and six domains were found to be shared among the four marine Conchiferans. Phylogenetic analyses indicated that most of these proteins and domains were present in the ancestral Conchiferan, but employed in shell formation later and independently in most clades. Although further studies utilizing deeper sequencing techniques to obtain genome and full-length sequences, and functional analyses, must be done in the future, our results here provide important pieces of information for the elucidation of the evolution of Conchiferan shells at the molecular level.

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Durophagous predation on scaphitid ammonoids in the Late Cretaceous Western Interior Seaway of North America

Cited by 14 publications

References 74 publications

Ammonite habitat revealed via isotopic composition and comparisons with co-occurring benthic and planktonic organisms

Ammonite habitat revealed via isotopic composition and comparisons with co-occurring benthic and planktonic organisms

The rise of a novel, plankton-based marine ecosystem during the Mesozoic: a bottom-up model to explain new higher-tier invertebrate morphotypes

Hydrophilic Shell Matrix Proteins ofNautilus pompiliusand The Identification of a Core Set of Conchiferan Domains

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