Dissecting "Lithiotis" Bivalves: Implications for the Early Jurassic Reef Eclipse

Fraser, Nicole; Bottjer, David J.; Fischer, Alfred G.

doi:10.1669/0883-1351(2004)019<0051:dlbift>2.0.co;2

Cited by 66 publications

(78 citation statements)

References 45 publications

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“…Hudson & Jefferies, 1961;Allasinaz, 1962Allasinaz, , 1964Allasinaz, , 1965Brinkmann, 1966;Encheva, 1972;Fürsich & Wendt, 1977;Hallam, 1981;Lu & Chen, 1986) and from the Jurassic (e.g., Fraser, Bottjer, & Fischer, 2004); following Végh-Neubrandt (1982), we consider Megalodon s.s. as a typically Paleozoic genus, specifically restricted to the Devonian. This genus is closely related to Neomegalodon and Triadomegalodon (Végh-Neubrandt, 1982).…”

Section: Megalodon J De C Sowerby 1827 P 131mentioning

confidence: 99%

Sedimentology, Paleontology, and Sequence Stratigraphy of Early Permian Estuarine Deposits, South-Central New Mexico, USA

Mack

Leeder

Pérez‐Arlucea

et al. 2003

PALAIOS

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Section: Megalodon J De C Sowerby 1827 P 131mentioning

confidence: 99%

Sedimentology, Paleontology, and Sequence Stratigraphy of Early Permian Estuarine Deposits, South-Central New Mexico, USA

Mack

Leeder

Pérez‐Arlucea

et al. 2003

PALAIOS

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“…Accumulations of bioclasts and scour structures indicate the influence of occasional storms (see FlüGel, 2004: 714). Well-preserved and paired shells of lithiotid bivalves suggest the presence of bivalve bioherms in the vicinity (Fraser et al, 2004;Posenato & aVanzini, 2006;Posenato & masetti, 2012). Short-lasting emersions are still evident as occasional red and clayey bedding planes.…”

Section: Facies Changesmentioning

confidence: 97%

Early Jurassic foraminiferal assemblages in platform carbonates of Mt. Krim, central Slovenia

Gale¹,

Kelemen²

2017

Geologija

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During the Early Jurassic, the subtropical carbonate platforms of the peri-Tethys Ocean experienced significant changes in their architectures, as well as in their biota compositions. Shallow-water carbonates from the northern part of the ancient Adriatic Carbonate Platform (External Dinarides) were investigated in six sections, which taken together cover the development of the platform from deposition of the uppermost Triassic Main Dolomite to the middle Lower Jurassic, lithiotid limestone. Our aim was to establish a detailed foraminiferal biostratigraphy and to observe the changes in size, abundance and diversity of foraminifera in different types of facies. As a result, the succession was successfully divided into stage or substage levels. Foraminiferal assemblages were shown to experience a gradual change in taxonomic composition (including an increase in the proportion of complex agglutinated forms), a general increase in abundance of specimens, and greater diversity in each facies type, except in bindstone and mudstone. Notable is the difference between Hettangian assemblages, which display fairly uniform compositions in all facies types and the predominance of opportunists, and the post-Hettangian assemblages, which become progressively more species-rich and where the differences in facies are perhaps more pronounced. Changes in the size of the species Meandrovoluta asiagoensis Fugagnoli & Rettori, and of the largest specimen in the assemblages, however, are less clear, but are arguably present. Faunal changes roughly correspond to the gradual change from the flat-top platform of the upper Triassic -Hettangian, where biota would be repeatedly subjected to stressed peritidal conditions, to a platform differentiated into lagoon, sand bars and ephemeral emergent areas, offering numerous habitats and perhaps more stable living conditions for organisms. IzvlečekKarbonatne platforme območja Tetide so v času starejše jure doživljale znatne spremembe v morfologiji in sestavi biote. Plitvomorske karbonate Jadranske karbonatne platforme (Zunanji Dinaridi) smo raziskali v šestih profilih na širšem območju Krima. Profili skupaj zajemajo interval od vrhnjega dela, glavnega dolomita do litiotidnega apnenca. Naš cilj je bil identifikacija foraminifernih biocon. Poleg same taksonomske sestave smo beležili še raznolikost foraminifernih združb, pogostnost (ali gostoto) foraminifer ter spremembo v velikosti vrste Meandrovoluta asiagoensis Fugagnoli & Rettori ter v velikosti največjih primerkov v združbah. Po pričakovanjih rezultati kažejo postopne spremembe v taksonomski sestavi foraminifernih združb, vključno z naraščanjem deleža kompleksnih aglutiniranih vrst ter splošen porast gostote primerkov in raznolikosti v vseh faciesih razen v bindstone in mudstone faciesih. Zanimivo je, da hettangijske združbe izkazujejo precejšnjo podobnost v sestavi in prevlado oportunističnih vrst, medtem ko so razlike med združbami glede na facies v mlajših plasteh bolj izrazite. Sprememba v velikosti vrste M. asiagoensis je znotraj p...

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“…1). Indirectamente, esto también fue consecuencia de la crisis biótica de fines del Triásico, la que afectó severamente a los corales hermatípi-cos, y entonces el ecosistema arrecifal fue rápidamente copado por el desarrollo de arrecifes de Lithiotis, antes del restablecimiento de los arrecifes de escleractinios más tarde en el Jurásico (Stanley, 1997;Leinfelder et al, 2002;Fraser et al, 2004). Tanto el contexto geológico, como la geometría y la estructura interna de esos cuerpos arrecifales de Lithiotis fueron comparados con las calizas cretácicas con rudistas.…”

Section: Evolución General De Los Patrones Paleo-biogeográficosunclassified

“…Los arrecifes alpinos alcanzaron hasta 5 m de espesor y decenas de metros de longitud, y los bivalvos que los construyeron exhibían un amplio rango de adaptaciones, incluyendo conchillas muy espesas con valvas muy desiguales, una de ellas actuando como un fino opérculo elástico, crecimiento alométrico de las porciones apicales, y una notable variabilidad fenotípica (véase discusión en Chinzei, 1982;Savazzi, 1996;Posenato y Masetti, 2012). Se propuso incluso la posibilidad de simbiosis con algas verdes (AccorsiBenini y Broglio-Loriga, 1977;Fraser et al, 2004), lo que fue luego desafiado sobre la base del análisis de los incrementos de crecimiento (Accorsi-Benini, 1985), atribuyéndose el gran tamaño de la conchilla a un crecimiento a tasas normales durante una muy larga vida (hasta 30 años).…”

Section: Evolución General De Los Patrones Paleo-biogeográficosunclassified

Revisión De Los Biocoremas Marinos Globales Del Jurásico Según La Distribución De Los Moluscos Bivalvos

Damborenea

2017

PEAPA

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Dissecting "Lithiotis" Bivalves: Implications for the Early Jurassic Reef Eclipse

Cited by 66 publications

References 45 publications

Sedimentology, Paleontology, and Sequence Stratigraphy of Early Permian Estuarine Deposits, South-Central New Mexico, USA

Sedimentology, Paleontology, and Sequence Stratigraphy of Early Permian Estuarine Deposits, South-Central New Mexico, USA

Early Jurassic foraminiferal assemblages in platform carbonates of Mt. Krim, central Slovenia

Revisión De Los Biocoremas Marinos Globales Del Jurásico Según La Distribución De Los Moluscos Bivalvos

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