Holothuroidea: new records from the Lower Cretaceous of the Agrio Formation, Neuquén Basin, Argentina. An integrated study with foraminifers and calcareous nannofossils

Caramés, Andrea; Martínez, Mariano Ignacio; Concheyro, Andrea; Remírez, Mariano; Adamonis, Susana

doi:10.1080/03115518.2019.1641617

Cited by 6 publications

(2 citation statements)

References 29 publications

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“…Our knowledge of the holothuroid extant (~ 1700) and fossil (~ 1000) records is extremely poor (Reich, 2013;WoRMS, 2023). South American fossil record is composed of only ~ 10 holothuroid species, most from the Devonian and Cretaceous of Argentina and Chile (Bertels (1965); Haude (1995a, b); Haude (1997); Caramés et al (2019)). In Brazil, there is only one species described to date-Calcancora beurleni Tinoco, 1963 from the Paleocene of northeast of Brazil, and the modern fauna of Holothuroidea is represented by ~ 50 species.…”

Section: Introductionmentioning

confidence: 99%

A new perspective into the discovery of diversity of sea cucumbers (Echinodermata: Holothuroidea)

Martins

Costa

Toledo

2023

Preprint

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The study of disarticulated ossicles of recent sea cucumbers from Campos Basin, Rio de Janeiro, Brazil, from various Holocene strata, obtained by micropaleontological methods, resulted in the identification of at least eight holothurian taxa, belonging to the four of the seven orders of Holothuroidea: Apodida (Synaptidae, Chiridotidae), Dendrochirotida (Psolidae and Cucumariidae), Holothuriida (Holothuria) and Molpadiida (Molpadiidae, Eupyrgidae). Our paper endorses the importance of studies of recent fauna based on isolated ossicles for taxonomy, biostratigraphy, and ecology. This study represents the first effort at the study of recent fauna of sea cucumbers based on the analysis of preserved ossicles in marine sediments.

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Section: Introductionmentioning

confidence: 99%

A new perspective into the discovery of diversity of sea cucumbers (Echinodermata: Holothuroidea)

Martins

Costa

Toledo

2023

Preprint

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“…Our knowledge of the holothuroid extant (~1700) and fossil (~1000) records is extremely poor (Reich, 2013;World Register of Marine Species, 2023). South American fossil record is composed of only approximately 10 holothuroid species, most from the Devonian and Cretaceous of Argentina and Chile (Bertels, 1965;Caramés et al, 2019;Haude, 1995aHaude, , 1995bHaude, 1997). In Brazil, there is only one species described to date-Calcancora beurleni Tinoco, 1963 from the Paleocene of northeast of Brazil, and the modern fauna of Holothuroidea is represented by approximately 50 species.…”

Section: Introductionmentioning

confidence: 99%

Disarticulated ossicles of sea cucumbers from the Campos Basin, Brazil: A new perspective into the discovery of diversity of Holothuroidea (Echinodermata)

Martins,

Costa,

Toledo

2023

The Holocene

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The study of disarticulated ossicles of recent sea cucumbers from Campos Basin, Rio de Janeiro, Brazil, from various Holocene strata, obtained by micropaleontological methods, resulted in the identification of at least eight holothurian taxa, belonging to the five of the seven orders of Holothuroidea: Apodida (Synaptidae, Chiridotidae), Dendrochirotida (Psolidae and Cucumariidae), Holothuriida ( Holothuria), and Molpadiida (Molpadiidae, Eupyrgidae). Our paper endorses the importance of studies of recent fauna based on isolated ossicles for taxonomy, biostratigraphy, and ecology. This study represents the first effort at the study of recent fauna of sea cucumbers based on the analysis of preserved ossicles in marine sediments.

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A micromorphological analysis of Bolonia lata Meunier from the Cretaceous of the Neuquén Basin (Patagonia, Argentina): new insights into the tracemaker

Giachetti,

Fernández,

Comerio

et al. 2023

Papers in Palaeontology

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Polychaetes, echinoids and gastropods have been proposed as tracemakers for Bolonia Meunier, an elongate positive epirelief trace fossil characterized by two lobes composed of biserial, subtriangular pads and a mostly heart‐shaped cross‐section. Here, the internal structure and micromorphology of Bolonia are described for the first time using serial thin sections from shallow‐marine Lower Cretaceous intervals of the Agrio Formation (Neuquén Basin, Argentina). In vertical thin sections, a conical structure of variable width extends centrally from the base to the top of the trace. In horizontal thin sections, grains are reoriented and reworked, forming a central zigzag structure. The organic matter and clays form grain aggregates representing the internal structure of individual pads of the trace fossil. The sediment has mostly been reoriented, with grains making up subcircular pods. We interpret the central conical structure as the collapse of the medial zone of the trace fossil, which could have destroyed drain tubes, especially in the absence of early cementation. Studying horizontal thin sections, we reconstruct the diagnostic biserial pads as biserial concave structures. These are interpreted as backfilling structures produced by the aboral and lateral spines of irregular echinoids, which worked together to compact the sediment anteroposteriorly and moved alternatively, explaining the zigzag pattern in the menisci. We propose Spatangoidea or Cassiduloidea (or a closely related group) with a similar burrowing ability and spine movement as tracemakers of these Bolonia specimens.

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Holothuroidea: new records from the Lower Cretaceous of the Agrio Formation, Neuquén Basin, Argentina. An integrated study with foraminifers and calcareous nannofossils

Cited by 6 publications

References 29 publications

A new perspective into the discovery of diversity of sea cucumbers (Echinodermata: Holothuroidea)

A new perspective into the discovery of diversity of sea cucumbers (Echinodermata: Holothuroidea)

Disarticulated ossicles of sea cucumbers from the Campos Basin, Brazil: A new perspective into the discovery of diversity of Holothuroidea (Echinodermata)

A micromorphological analysis of Bolonia lata Meunier from the Cretaceous of the Neuquén Basin (Patagonia, Argentina): new insights into the tracemaker

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