Non-calcareous Tubeworms in Ancient Hydrocarbon Seeps

Georgieva, Magdalena N.; Little, Crispin T. S.

doi:10.1007/978-3-031-05623-9_6

Cited by 3 publications

(2 citation statements)

References 81 publications

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“…Thus, to what extent soft tissue is preserved among seep animals is unknown. Non-soft tissue organic material has been reported from organic-walled fossil elasmobranch egg capsules from ancient seeps (Kiel et al, 2013;Treude, 2022) and fossil organic-walled annelids from fossil seeps and hydrothermal vents (Georgieva et al, 2019;Georgieva and Little, 2022). True soft tissue remains of the digestive La Voulte-sur-Rhône, France Wilby et al (1996) tract of pholadoidean bivalves were reported from another ancient chemosynthetic community, a late Oligocene-early Miocene wood fall from Washington State, USA (Kiel et al, 2012).…”

Section: Internal Soft Tissue In Fossil Decapod Crustaceansmentioning

confidence: 99%

Internal anatomy of a brachyuran crab from a Late Cretaceous methane seep and an overview of internal soft tissues in fossil decapod crustaceans

Klompmaker,

Kloess,

Jauvion

et al. 2023

Palaeontol Electron

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Cretaceous-aged methane seep carbonates in the Western Interior Seaway, USA, have yielded a relatively high diversity and concentration of fossils, including decapod crustaceans, compared to their surrounding, contemporaneous sediments. With technological advances in non-destructive imaging techniques, the internal anatomy of decapods can be studied in remarkable detail. Here, we present a brachyuran crab specimen from an upper Campanian methane seep carbonate in South Dakota, USA. While the external morphology of the crab is insufficient for species identification (Secretanella sp.), remarkable details of the internal morphology are preserved including soft tissues. Four phyllobranchiate gills are visible due to a broken cuticle. A µCTscan revealed parts of the digestive tract including the esophagus and the cardiac stomach (foregut), and possible anterior gastric muscles. An esophagus has not been reported previously in a fossil decapod. We also found mandibles and their apodemes. Because of soft tissue preservation, the South Dakotan locality may be a candidate Konservat-Lagerstätte. To our knowledge, the studied crab contains the first preserved animal soft tissue reported from an ancient methane seep. Our new overview of internal soft tissues preserved in fossil decapod crustaceans shows that, besides muscles reported previously, gills and remains of the digestive tract are most often reported (8 and 13 occurrences, respectively). Reproductive organs, nerve chords, and the heart are only known from one or two occurrences. Although reports of soft internal anatomy preservation remain relatively rare, continued application of µCT-scans to fossil decapods has the potential to illuminate our knowledge of the evolution of internal decapod anatomy.

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Section: Internal Soft Tissue In Fossil Decapod Crustaceansmentioning

confidence: 99%

Internal anatomy of a brachyuran crab from a Late Cretaceous methane seep and an overview of internal soft tissues in fossil decapod crustaceans

Klompmaker,

Kloess,

Jauvion

et al. 2023

Palaeontol Electron

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“…2014; Georgieva et al . 2019; Vinn 2022; Georgieva & Little 2022; Baliński et al . 2022; Klompmaker et al .…”

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confidence: 99%

Evolutionarily ancient deep‐water seep communities in the Eocene Tethys: examples from Buje (Croatia)

Hryniewicz,

Birgel,

Kaim

et al. 2024

Papers in Palaeontology

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We report a newly discovered hydrocarbon seep deposit from the Eocene bathyal flysch, exposed in the town of Buje in Istria, Croatia. Molecular fossils of methane‐oxidizing prokaryotes and abundant banded botryoidal cements indicate strong fluid flux at this site. We systematically describe the fauna of this and another seep deposit previously reported from Buje. The faunal assemblages are composed of eight species, these being an unidentified solemyid protobranch bivalve, the nuculid Nucula bowerbanki?, the nuculanid Nuculana? sp., the mytilid Brachidontes? amanoi sp. nov., the two thyasirids Channelaxinus dinaricus sp. nov. and Thyasira histriaensis sp. nov., the lucinid bivalve Amanocina bujensis sp. nov., and a possible provannid gastropod. The two assemblages are of low diversity (4 and 5 species, respectively), and are dominated by chemosymbiotic species whose occurrence is largely restricted to seeps. Despite their spatial and stratigraphic proximity, the two deposits share only a single species, Channelaxinus dinaricus, probably due to different fluid flux regimes at both seeps. The Buje seep assemblages are among the very few Late Cretaceous to Palaeogene chemosynthesis‐based faunal assemblages from the Tethys Ocean (the others being Late Cretaceous vent assemblages from Cyprus). From an evolutionary perspective, the Buje seep communities consist of genera with Mesozoic origins but lack Cenozoic novelties such as bathymodiolin mussels and vesicomyid clams, which are known from coeval deposits from the Pacific and dominate vents and seeps today. Thus, the Buje seep fauna support previous assertions that the Eocene Tethyan seep faunas preserved an ancient aspect, whereas evolutionary novelties arose in the Pacific.

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A new chemosynthetic community (ostracods, foraminifers, echinoderms) from Late Jurassic hydrocarbon seeps, south-eastern France Basin

Forel,

Charbonnier,

Gale

et al. 2024

Geobios

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Non-calcareous Tubeworms in Ancient Hydrocarbon Seeps

Cited by 3 publications

References 81 publications

Internal anatomy of a brachyuran crab from a Late Cretaceous methane seep and an overview of internal soft tissues in fossil decapod crustaceans

Internal anatomy of a brachyuran crab from a Late Cretaceous methane seep and an overview of internal soft tissues in fossil decapod crustaceans

Evolutionarily ancient deep‐water seep communities in the Eocene Tethys: examples from Buje (Croatia)

A new chemosynthetic community (ostracods, foraminifers, echinoderms) from Late Jurassic hydrocarbon seeps, south-eastern France Basin

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