Submarine Caves in a Jurassic Reef (La Rochelle, France) and the Evolution of Cave Biotas

Taylor, Paul D.; Palmer, Tim

doi:10.1007/s001140050084

Cited by 7 publications

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“…The specimen described here comes from the lower Kimmeridgian (Cymodoce Zone, Chatelaillonensis Subzone) of the cliff of Les Boucholeurs at Châtelaillon, south of La Rochelle (Charente‐Maritime, northern Aquitaine Basin) in western France. The beds of this Upper Jurassic section, called Marnes de Châtelaillon, overlie the reefal deposits of the Pointe du Chay (Cymodoce Zone, Achilles Subzone) (Hantzpergue & Maire 1981; Hantzpergue 1989; Taylor & Palmer 1994; Olivier et al. 2003) (Fig.…”

Section: Methodsmentioning

confidence: 99%

An ammonite–fish association from the Kimmeridgian (Upper Jurassic) of La Rochelle, western France

Vullo

Cavin

Clochard

2009

LET

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International audienceA partially disarticulated actinopterygian fish preserved in a large three-dimensional ammonite body chamber is described from the Kimmeridgian of western France. Taphonomic observations on the degree of preservation of the fish and the development of epibiont organisms on the inner wall of the shell indicate a rather long time interval before sediment totally filled the body chamber. The fish, referred to an indeterminate Macrosemiidae, probably used this empty ammonite (Rasenioides, Aulacostephanidae) shell as a refuge, or possibly for spawning and/or brooding. It can be assumed that ammonite shells may have constituted common shelters for demersal fishes living in an open-marine shelf environment, near to a muddy bottom devoid of rocks

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Section: Methodsmentioning

confidence: 99%

An ammonite–fish association from the Kimmeridgian (Upper Jurassic) of La Rochelle, western France

Vullo

Cavin

Clochard

2009

LET

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“…The deep sea represents an important ecological refugium in the modern marine realm (Vermeij 1986; Gage & Tyler 1991; Wisshak et al. 2009), along with cryptic voids and caves in subtidal reefs (Kase & Hayami 1992; Taylor & Palmer 1994). Coelacanths, stalked crinoids, shell‐bearing cephalopods, pleurotomariid gastropods and many other Palaeozoic and Mesozoic forms of life are surviving in the dark of bathyal and abyssal depths, often with a very low density and/or taxonomic diversity (Eldredge & Stanley 1984; Wray et al.…”

Section: Introductionmentioning

confidence: 99%

Living Monoplacophora: morphological conservatism or recent diversification?

Kano¹,

Kimura²,

Warèn³

2012

Zoologica Scripta

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Kano, Y., Kimura, S., Kimura, T. & Warén, A. (2012) Living Monoplacophora: morphological conservatism or recent diversification? —Zoologica Scripta, 41, 471–488. The molluscs of the class Monoplacophora are classic and probably the most striking case of a ‘living fossil’ in the deep sea. Until the discovery of the first living specimens in 1950s, the group was thought to be extinct since the Devonian period, almost 400 million years ago. Morphological conservatism over a long span of time in a ‘living‐fossil’ lineage may theoretically result in distant but closely resembling taxa, and this idea apparently led some authors to recognise as many as six families and three superfamilies for less than three dozen living monoplacophoran species. However, no genetic or fossil data have been available regarding the history of their diversification. Here we describe Veleropilina seisuimaruae sp. n., the first member of the class from the north‐western Pacific, based on the shell, radular and anatomical characteristics. Phylogenetic analyses of 6‐kb DNA sequences estimate that the divergence of V. seisuimaruae and Laevipilina hyalina, the only other monoplacophoran available for genetic studies, dates back only to the Late Cretaceous, despite their significant morphological differences among the living members of the class. The recent Monoplacophora might have radiated fairly recently from a cryptic lineage with ordinary rates of morphological evolution, possibly after the global deep‐sea anoxia at the Cenomanian/Turonian boundary.

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“…The abundance of well preserved B. faviai in the Upper Oligocene outcrop of Peyrère, in association with the Neritopsidae and Pickworthiidae and other elements of cryptic faunas, can be seen as providing the first evidence of a submarine cave ecosystem during the Tertiary. While our knowledge of this environment is restricted to synchronously displaced fossil remains, its in situ preservation must be considered exceptional (Taylor & Palmer, 1994). Few studies have been carried out on the molluscan faunas of submarine caves because these are among the most difficult habitats to study.…”

Section: Discussionmentioning

confidence: 99%

The European Tertiary Neritiliidae (Mollusca, Gastropoda, Neritopsina): indicators of tropical submarine cave environments and freshwater faunas

Livet

2004

Zoological Journal of the Linnean Society

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The oldest freshwater neritiliid, Neritilia bisinuata , is described from the Middle Eocene of the Loire Basin. Another European species, N. neritinoides , ranging from the Lower Oligocene to Lower Miocene (Upper Burdigalian) is recognized; its habitat appears to have been freshwater, but very close to the sea. Two new marine neritiliid species from the Aquitaine Basin are described: Bourdieria favia sp. nov. from the Upper Oligocene and Pisulinella aucoini sp. nov. from the Lower Miocene. A third undescribed species from the Lower Miocene is referred to the same family and related to Pisulinella . The Oligocene species has a strong spiral sculpture, a character completely absent in previously known neritiliid species. The genus Agapilia , founded on juvenile N. neritinoides and adult Vitta picta , appears to be a junior synonym of the genus Vitta. The associated occurrence of shells of the families Neritiliidae, Neritopsidae and Pickworthiidae (well-known inhabitants of Indo-West Pacific submarine caves) at Peyrère suggest the first occurrence of a characteristic assemblage of dark submarine caves during the Oligocene. Both factorial analysis and relative abundance show that at Peyrère these families are associated with other cryptic fossils (various gastropods, bivalves, Brachiopoda, corals, Annelida). However, there are indications of other submarine cave assemblages in various Cenozoic deposits from the Palaeocene to the middle Miocene.

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Submarine Caves in a Jurassic Reef (La Rochelle, France) and the Evolution of Cave Biotas

Cited by 7 publications

References 0 publications

An ammonite–fish association from the Kimmeridgian (Upper Jurassic) of La Rochelle, western France

An ammonite–fish association from the Kimmeridgian (Upper Jurassic) of La Rochelle, western France

Living Monoplacophora: morphological conservatism or recent diversification?

The European Tertiary Neritiliidae (Mollusca, Gastropoda, Neritopsina): indicators of tropical submarine cave environments and freshwater faunas

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