Nemanthus

Nemanthus is a genus of brown algae belonging to the Chordariaceae family. It is characterized by its cylindrical or flattened, gelatinous thallus. These algae are typically found attached to rocks or other algae in intertidal and shallow subtidal zones of temperate waters.

Nemanthus species are known for their relatively simple morphology, lacking a clear differentiation into stipe and blade. The thallus consists of irregularly branched filaments embedded within a gelatinous matrix. Reproduction occurs through the formation of unilocular sporangia, which release zoospores.

The taxonomic classification of Nemanthus has been subject to revision over time. Identification often relies on microscopic examination of reproductive structures and vegetative anatomy.

While not generally considered economically significant, Nemanthus plays a role in the marine ecosystem as a primary producer and habitat for small invertebrates. Further research is ongoing to fully understand the ecological importance and phylogenetic relationships of this genus.