Flaviatella gen. nov., a new genus of monothalamous foraminifera with a wide geographical and bathymetrical distribution

Holzmann, Maria; Gooday, Andrew J; Pawlowski, Jan

Flaviatella gen. nov., a new genus of monothalamous foraminifera with a wide geographical and bathymetrical distribution

Holzmann, Maria ORCID: https://orcid.org/0000-0003-2460-6210; Gooday, Andrew J ORCID: https://orcid.org/0000-0002-5661-7371; Pawlowski, Jan ORCID: https://orcid.org/0000-0003-2421-388X. 2025 Flaviatella gen. nov., a new genus of monothalamous foraminifera with a wide geographical and bathymetrical distribution. Progress in Oceanography, 239, 103589. 1, pp. 10.1016/j.pocean.2025.103589

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Official URL: https://doi.org/10.1016/j.pocean.2025.103589

Abstract/Summary

Single chambered foraminifera (monothalamids) occur in all marine habitats, as well as freshwater and terrestrial environments. Their genetic diversity by far surpasses their morphological variety and a combination of morphological and molecular data is needed to distinguish species and classify them. We present here the results of an integrative taxonomic study of monothalamids from bathyal and abyssal samples collected from the Bering Sea and Aleutian Trench and from coastal waters in the Southern Hemisphere. Based on morphological and molecular (DNA barcode sequences of 18S rRNA) data, we describe Flaviatella gen. nov., a member of monothalamid Clade Y. The type species, F. profunda gen. & sp. nov., was isolated from surface sediment samples collected at lower bathyal depths (3553 m) in the Bering Sea and at abyssal depths (4612 m) close to the nearby Aleutian trench. Specimens collected in 2007 from near the Japan trench (5360 m depth) are morphologically similar and genetically identical to this species. We also describe a second species of the new genus, F. siemensma sp. nov., based on samples collected in 2019 from a shallow subtidal bay in the Falkland Islands. Flaviatella is a new genus with a large geographic distribution and a wide bathymetric range, showing that monothalamid taxa can successfully colonize disjunct areas and adapt to different environmental conditions.

Item Type:

Publication - Article

Digital Object Identifier (DOI):

10.1016/j.pocean.2025.103589

ISSN:

00796611

Additional Keywords:

Monothalamids, DNA barcoding, Taxonomy, Deep sea habitats

NORA Subject Terms:

Marine Sciences

Date made live:

20 Nov 2025 14:29 +0 (UTC)