Thermoprofundales as the new name for MBG-D archaea, the benthic archaeal cosmopolitan

Marine Benthic Group D (MBG-D) archaea, discovered by 16S rRNA gene survey decades ago, are ecologically important, yet under-studied and uncultured sedimentary archaea.

Go to the profile of Meng Li
Dec 04, 2018

In our new study, we conduct a comprehensive meta-analysis based on the 16S rRNA genes of MBG-D archaea. Results show that MBG-D archaea are one of the most frequently found archaeal lineages in global sediment with widespread distribution and high abundance, including 16 subgroups in total. Co-occurrence analyses indicate significant non-random association of MBG-D archaea with Lokiarchaeota and Hadesarchaea, suggesting potential interactions among these archaeal groups. 

Meanwhile, based on four nearly complete metagenome-assembled genomes (MAGs) and corresponding metatranscriptomes reconstructed from mangrove and intertidal mudflat sediments, we provide insights on metabolic potentials and ecological functions of MBG-D archaea. Our results reveal MBG-D archaea as an important ubiquitous benthic sedimentary archaeal group with specific mixotrophic metabolisms. Based on the 16S rRNA gene and whole genome analysis, we proposed the name Thermoprofundales as a new Order within the Class Thermoplasmata. 

Thermoprofundales ('les. N.L. suff. -ales ending designing an order name; N.L. masc. pl. n. Thermoprofundales, the order denoting MBG-D archaea, affiliated to Thermoplasmata). This nomenclature of Thermoprofundales is derived from the class name of Thermoplasmata. Since Thermoprofundales was first discovered in marine benthic sediments with various widespread distribution and enigmatic ecological roles, L. adj. profundus could generally describe its living preference 

Details information could be found by this DOI:

Go to the profile of Meng Li

Meng Li

Professor, Shenzhen University


Go to the profile of Oded Béjà
Oded Béjà about 1 month ago

link not working

Go to the profile of Meng Li
Meng Li about 1 month ago

Sorry about that. The ISMEJ still not yet online, but I think it will be available soon.

Go to the profile of Meng Li
Meng Li about 1 month ago

I update the link. The paper is online now. Thanks.

Go to the profile of Ruth Milne
Ruth Milne about 1 month ago

Thanks for posting the link!