NDLI: Liostrea roemeri (Ostreida, Bivalvia) attached to Upper Jurassic ammonites of northeastern Mexico

Content Provider	Springer Nature Link
Author	Zell, Patrick Beckmann, Seija Stinnesbeck, Wolfgang
Copyright Year	2014
Abstract	In northeastern Mexico, the Upper Jurassic to lowermost Cretaceous (Kimmeridgian–Berriasian) hemipelagic La Casita Formation is widely known for its diverse and abundant assemblage of well-preserved ammonites. Here we present specimens of Kimmeridgian Idoceras sp. and Tithonian “Virgatosphinctes” aff. communis Spath covered by the epizoic oyster Liostrearoemeri (Quenstedt, 1843). Attachment to both sides of the ammonite shells, taphonomic and epizoan-to-ammonite orientation analyses and shell-size measurements indicate that the oysters attached to living hosts. We interpret the presence of distinct bivalve growth cohorts at this location to reflect two generations of epizoan settlement: an initial cohort of oysters settled on the juvenile whorls of ammonites and were followed by a second set of considerably smaller individuals on the outer whorls. A pseudoplanktonic mode of life of Liostrea roemeri attached to ammonites may reflect a strategic response to oxygen-depleted conditions near the seafloor of the Upper Jurassic La Casita Sea. L. roemeri was previously described from Europe, also attached to ammonites.
Starting Page	439
Ending Page	451
Page Count	13
File Format	PDF
ISSN	18671594
Journal	Palaeobiodiversity and Palaeoenvironments
Volume Number	94
Issue Number	3
e-ISSN	18671608
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2014-04-01
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Oysters Epizoans Jurassic Mexico La Casita Formation Paleontology Biodiversity Animal Systematics/Taxonomy/Biogeography Plant Systematics/Taxonomy/Biogeography Freshwater & Marine Ecology
Content Type	Text
Resource Type	Article
Subject	Ecology Geology Ecology, Evolution, Behavior and Systematics Global and Planetary Change Paleontology

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