In freshwater jar with moss, algae, and a plant growing within it
Belonging to the group of annelids, they take their name from the bristles that cover their stomach. We can see them moving elegantly in the sediments of stagnant waters. In this video we can appreciate the eyes and bowel movements.
NCBI Taxonomy
https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?id=74726
Superkingdom: Eukaryota;
Clade: Opisthokonta;
Kingdom: Metazoa;
Clade: Eumetazoa; Bilateria; Protostomia; Spiralia; Lophotrochozoa;
Phylum: Annelida;
Class: Clitellata;
Subclass: Oligochaeta;
Order: Haplotaxida;
Suborder: Tubificina;
Family: Naididae;
Subfamily: Naidinae;
Genus: Chaetogaster
References:
Atlante dei microorganismi acquatici, Streble H., Krauterd. Franco Muzzio Ed. (2010).
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Broken in half, front half being consumed by a hydra.