Mediocremonas mediterraneus, a New Member within the Developea

Abstract

The Stramenopiles are a large and diverse group of eukaryotes that possess various lifestyles required to thrive in a broad array of environments. The stramenopiles branch with the alveolates, rhizarians, and telonemids, forming the supergroup TSAR. Here, we present a new genus and species of aquatic nanoflagellated stramenopile: Mediocremonas mediterraneus, a free‐swimming heterotrophic predator. M. mediterraneus cell bodies measure between 2.0‐4.0 μm in length and 1.2‐3.7 μm in width, possessing two flagella and an oval body morphology. The growth and grazing rate of M. mediterraneus in batch cultures ranges from 0.68 to 1.83 d‐1 and 1.99 to 5.38 bacteria h‐1, respectively. M. mediterraneus was found to be 93.9% phylogenetically similar with Developayella elegans and 94.7% with Develorapax marinus, two members within the class Developea. The phylogenetic position of the Developea and the ability of M. mediterraneus to remain in culture makes it a good candidate for further genomic studies that could help us to better understand phagotropy in marine systems as well as the transition from heterotrophy to phototrophy within the stramenopiles.

Publication
The Journal of Eukaryotic Microbiology
Bradley Weiler
Bradley Weiler
PhD Student

My current research combination of molecular techniques (SSU rRNA amplicon sequencing), traditional culturing and microscopy, and imaging (fluorescence in-situ hybridization) will be used in an attempt to finally uncover the causative agents of various coral diseases.

Javier del Campo
Javier del Campo
Assistant Professor of Microbial Ecology and Evolution

My research aims at understanding the global diversity and distribution of eukaryotic and prokaryotic microbes employing curated phylogenetic frameworks focusing on novel environmental taxa.