A thyasirid-dominated methane-seep deposit from Montañita, southwestern Ecuador, from the Oligocene-Miocene boundary

Kiel, Steffen; Birgel, Daniel; Lu, Yang; Wienholz, Denise; Peckmann, Jörn

doi:10.1016/j.palaeo.2021.110477

Cited by 7 publications

(4 citation statements)

References 69 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…montanita ) from the Oligocene–Miocene boundary Montañita seep deposit in Equador (Kiel et al . 2021), and has a much less anteriorly positioned umbo than Th . montanita .…”

Section: Systematic Palaeontologymentioning

confidence: 99%

“…In recent decades, a wealth of literature on ancient hydrocarbon seeps and associated faunas has been published (e.g. Campbell 2006;Kaim et al 2008Kaim et al , 2014Kiel 2010bKiel , 2010cKiel et al , 2020Kiel et al , 2021Kiel et al , 2022, resulting in the recognition of 228 ancient hydrocarbon seep deposits of Silurian to Pleistocene age (Hryniewicz 2022), and their number is growing (Kiel et al 2023a(Kiel et al , 2023b. In contrast, ancient hydrothermal vent deposits are rare, with a few scattered examples of Silurian to Eocene age (see Little 2002;Campbell 2006).…”

mentioning

confidence: 99%

“…2008, 2014; Kiel 2010b, 2010c; Kiel et al . 2013, 2017, 2020, 2021, 2022), resulting in the recognition of 228 ancient hydrocarbon seep deposits of Silurian to Pleistocene age (Hryniewicz 2022), and their number is growing (Kiel et al . 2023a, 2023b).…”

mentioning

confidence: 99%

See 2 more Smart Citations

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

Hryniewicz,

Birgel,

Kaim

et al. 2024

Papers in Palaeontology

Self Cite

View full text Add to dashboard Cite

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.

show abstract

“…montanita ) from the Oligocene–Miocene boundary Montañita seep deposit in Equador (Kiel et al . 2021), and has a much less anteriorly positioned umbo than Th . montanita .…”

Section: Systematic Palaeontologymentioning

confidence: 99%

mentioning

confidence: 99%

See 1 more Smart Citation

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

Hryniewicz,

Birgel,

Kaim

et al. 2024

Papers in Palaeontology

Self Cite

View full text Add to dashboard Cite

show abstract

“…It has been demonstrated that some bathymodiolin mussels host either thiotrophic (Cavanaugh, 1983;Distel et al, 1988) or aerobic methanotrophic bacteria, others harbor both types of symbionts, a phenomenon referred to as dual symbiosis (Childress et al, 1986;Fisher et al, 1993;Fiala-Médioni et al, 2002;Cordes et al, 2009;Xu et al, 2019). Putative chemosymbiotic invertebrates were also common at ancient seeps (Kiel, 2010;Kiel and Peckmann, 2019;Kiel et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Lipid Biomarker Patterns Reflect Nutritional Strategies of Seep-Dwelling Bivalves From the South China Sea

et al. 2022

Self Cite

View full text Add to dashboard Cite

Invertebrates living at methane seeps such as mussels and clams gain nutrition through symbiosis with chemosynthetic, chiefly methanotrophic and thiotrophic bacteria. Lipid biomarkers, including their compound-specific carbon stable isotope compositions, extracted from the host tissues are predestined for deciphering the various sources of diets and the associations among varying environments, endosymbionts, and hosts. Here, we investigated lipid inventories of soft tissues of two bathymodiolin mussel species hosting aerobic methanotrophic bacteria (Gigantidas platifrons from Site F and Gigantidas haimaensis from Haima seeps), one bathymodiolin mussel with thiotrophic bacteria (Bathymodiolus aduloides from Haima seeps), and one vesicomyid clam (Archivesica marissinica from Haima seeps) from the South China Sea. The gills of mussels hosting methanotrophic symbionts were found to contain high amounts of lipids of aerobic methanotrophic bacteria, such as the 4,4-dimethyl lanosterol, and other 4-methyl sterols, and the type I methanotroph-specific monounsaturated fatty acids (MUFAs) C16:1ω9 and C16:1ω8. Production of methyl-sterols is favored over fatty acids at low oxygen concentrations, as demonstrated in culture experiments with Methylococcus capsulatus. Since lesser fatty acids and abundant sterols are found in G. haimaensis compared to G. platifrons, G. haimaensis apparently lived at very low oxygen levels. Extremely high levels of MUFAs C16:1ω7 and C18:1ω7 were found in gill tissue of both B. aduloides and the vesicomyid clam A. marissinica. Given the absence of ω8 fatty acids, both B. aduloides and the vesicomyid clam contain thiotrophic bacteria only. The occurrence of 13C-enriched 24-methylenecholesterol in B. aduloides indicates that the animal complemented its diet by filter-feeding (ca. 3% of the total sterol inventory) on photosynthetically derived carbon, whereas the majority of sterols are pointing to a diet relying on endosymbionts. Different types of 4-methyl sterols were observed between the thiotroph-containing mussel and methanotroph-containing mussels, suggesting different biosynthetic steps are present from lanosterol to cholesterol between animal hosts and aerobic methanotrophs. Among the four bivalve species, specific lipid biomarker patterns diagnostic for either the symbionts or the hosts yielded similar δ13C values in each species, indicating that the host obtained its nutrition either directly from the symbionts or derived at least most of its carbon in this way. The information derived from lipid biomarkers of bivalves and their corresponding symbionts in modern environments is vital to interpret data from the rock record, where most other methods to study microbial community composition are not applicable.

show abstract

Bivalvia in Ancient Hydrocarbon Seeps

Amano

Kiel

Hryniewicz

et al. 2022

Topics in Geobiology

View full text Add to dashboard Cite

A thyasirid-dominated methane-seep deposit from Montañita, southwestern Ecuador, from the Oligocene-Miocene boundary

Cited by 7 publications

References 69 publications

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

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

Lipid Biomarker Patterns Reflect Nutritional Strategies of Seep-Dwelling Bivalves From the South China Sea

Bivalvia in Ancient Hydrocarbon Seeps

Contact Info

Product

Resources

About