Introduction Caloneis egena is a species of diatom originally described from Campeche Bay (Mexico) that is regarded as cosmopolitan, with several reports from the Pacific region. Methods A strain of diatom from the genus Caloneis was isolated from the Gulf of Tomini, Sulawesi (Indonesia). It was subjected to an integrated approach combining microscopy, genomic analyses, and phylogeny. Results Although looking similar to C. ege...

Introduction Xenophyophores are large benthic agglutinated Foraminifera that are a major component of the Clarion-Clipperton Zone megafauna. Methods Two xenophyophore specimens were obtained and submitted to genomic investigations. Results For both specimens, it was possible to obtain a ca. 25 kb circular xenophyophore-associated mitochondrial genome (XAM) showing similar gene contents with other Retaria, with which they are a...

Haslea ostrearia represents the model species of blue diatoms, a cluster of benthic marine species all belonging to the genus Haslea , noticeable for producing a blue pigment called marennine famous for its greening activity on the gills of bivalves but also for its potential in biotechnology. The exact distribution of H. ostrearia is unknown. It has been long considered a cosmopolitan diatom, but recent studies provided evide...

The current article focuses on the morphological and molecular characterization of the often inconspicuous genus Amicula. This recently erected genus from brackish and marine sediments was monotypic but here we describe two new tropical species: Amicula micronesica sp. nov. and Amicula vermiculata sp. nov. Once considered an incertae sedis genus regarding its higher rank taxonomy, its position among the family Diploneidaceae i...