Editorial for Special Issue “Meiofauna Biodiversity and Ecology”

Semprucci, Federica; Sandulli, Roberto

doi:10.3390/d12060249

Cited by 3 publications

(1 citation statement)

References 22 publications

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“…An alternative is that they may reflect small-organism activity in the cavities, and thus could be meiofauna. The concept of meiofauna (organisms of sizes between micro- and macro-fauna, up to 1 mm size) is well-developed in biological literature (Semprucci & Sandulli, 2020) but almost unknown in the ancient record (e.g. Knaust, 2010).…”

Section: Discussionmentioning

confidence: 99%

Keratose sponges in ancient carbonates – a problem of interpretation

Neuweiler

Kershaw

Boulvain

et al. 2022

Preprint

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Increasing current interest in sponge fossils includes numerous reports of diverse vermicular and peloidal structures interpreted as keratose sponges in Neoproterozoic to Mesozoic carbonates and in various open marine to peritidal and restricted settings. Reports of their occurrence are fundamental and far-reaching for understanding microfacies and diagenesis where they occur; and fossil biotic assemblages, as well as wider aspects of origins of animals, sponge evolution/ecology and the systemic recovery from mass extinctions. Keratose sponges: 1) have elaborate spongin skeletons but no spicules, thus lack mineral parts and therefore have poor preservation potential so that determining their presence in rocks requires interpretation; and 2) are presented in publications as interpreted fossil structures almost entirely in two-dimensional (thin section) studies, where structures claimed as sponges comprise diverse layered, network, particulate and amalgamated fabrics involving calcite sparite in a micritic groundmass. There is no verification of sponges in these cases and almost all of them can be otherwise explained; some are certainly not correctly identified. The diversity of structures seen in thin sections may be reinterpreted to include: a) meiofaunal activity; b) layered, possibly microbial (spongiostromate) accretion; c) sedimentary peloidal to clotted micrites; d) fluid escape and capture resulting in birdseye to vuggy porosities; and e) molds of siliceous sponge spicules. Without confirmation of keratose sponges in ancient carbonates, interpretations of their role in ancient carbonate systems, including facies directly after mass extinctions, are unsafe, and alternative explanations for such structures should be considered. This study calls for greater critical appraisal of evidence, to seek confirmation or not, of keratose sponge presence.

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Section: Discussionmentioning

confidence: 99%

Keratose sponges in ancient carbonates – a problem of interpretation

Neuweiler

Kershaw

Boulvain

et al. 2022

Preprint

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Free-living nematodes research: State of the art, prospects, and future directions. A bibliometric analysis approach

Montanara

Baldrighi

Franzo

et al. 2022

Ecological Informatics

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New species of Polycystididae (Platyhelminthes: Kalyptorhynchia) from Cuba and the Pacific coast of Panama

Diez¹,

Sanjuan

Monnens

et al. 2023

EJT

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Four new species of marine polycystidid microturbellarians (Platyhelminthes, Kalyptorhynchia) are described from Cuba and Panama. These species are Brachyrhynchoides ortizi sp. nov., Djeziraia adriani sp. nov., Phonorhynchoides lalanai sp. nov., and Sabulirhynchus ibarrae sp. nov. All species occur in Cuba, and P. lalanai sp. nov. was also retrieved from the Pacific coast of Panama. From the latter locality, we also report Sabulirhynchus axi Artois & Schockaert, 2000. All species are readily distinguished from their congeners by the morphology of the sclerotised structures of the male genital system. The prostatic stylet of B. ortizi sp. nov. is the shortest and widest known for Brachyrhynchoides. Djeziraia adriani sp. nov. can be recognized by its paired seminal vesicles and S-shaped prostate stylet. The prostatic stylet of P. lalanai sp. nov. is proximally twisted and the length proportion between its accessory and prostatic stylet is the largest among all known species of Phonorhynchoides. Sabulirhynchus axi and Sabulirhynchus ibarrae sp. nov. are morphologically similar, yet the latter species is unique due to the characteristic ridge in the middle of the proximally tubular prostatic stylet. With the data available today, a possible explanation of rhabdocoel biogeographic patterns across the Isthmus of Panama remains largely speculative.

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Editorial for Special Issue “Meiofauna Biodiversity and Ecology”

Cited by 3 publications

References 22 publications

Keratose sponges in ancient carbonates – a problem of interpretation

Keratose sponges in ancient carbonates – a problem of interpretation

Free-living nematodes research: State of the art, prospects, and future directions. A bibliometric analysis approach

New species of Polycystididae (Platyhelminthes: Kalyptorhynchia) from Cuba and the Pacific coast of Panama

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