Morphology and molecular phylogeny of two new species of Psammophaga (Rhizaria, Foraminifera) from the west coast of India.

Autor: Kaushik T; Biodiversity and Palaeobiology Group, Agharkar Research Institute, G. G. Agarkar Road, Pune 411004, Maharashtra, India; Savitribai Phule Pune University, Pune 411007, Maharashtra, India. Electronic address: tkaushik@aripune.org., Dixit V; Biodiversity and Palaeobiology Group, Agharkar Research Institute, G. G. Agarkar Road, Pune 411004, Maharashtra, India., Murugan T; Biodiversity and Palaeobiology Group, Agharkar Research Institute, G. G. Agarkar Road, Pune 411004, Maharashtra, India.
Jazyk: angličtina
Zdroj: European journal of protistology [Eur J Protistol] 2024 Feb; Vol. 92, pp. 126035. Date of Electronic Publication: 2023 Nov 21.
DOI: 10.1016/j.ejop.2023.126035
Abstrakt: Benthic foraminifera are unicellular eukaryotic protists that construct an organic, agglutinated, or calcareous test wall. Although single-chambered (monothalamous) foraminifera are ubiquitous in marine habitats worldwide, they are poorly known compared to their multi-chambered relatives, notably from the tropical marine environments of India. In this study, we describe two new species of marine monothalamid genus Psammophaga Arnold, 1982, from the Rajapuri Creek, coastal Maharashtra, India (Arabian Sea). Psammophaga holzmannae sp. nov. is ovoid to spherical shaped, 103-246 µm in length, single aperture, translucent to orange color cytoplasm, outer surface is composed of agglutinated fine clay particles, and ingested mineral grains are concentrated near its aperture. Psammophaga sinhai sp. nov. is oblong, elliptical, or droplet-shaped, 279-448 µm in length, single aperture, yellow olive color cytoplasm, the exterior surface formed of agglutinated fine clay particles, and the ingested mineral grains are dispersed throughout the body. Phylogenetic analyses based on partial small subunit rRNA gene sequences position new species within the Clade E of monothalamids and are genetically distinct from other Psammophaga. Elemental (SEM-EDS) analysis of engulfed mineral grains revealed preferential selection and uptake of heavy opaque titaniferous minerals from the ambient environment in the cytoplasm.
Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
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Databáze: MEDLINE
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