Spirocuta (from Latin spira 'coil, spire' and cutis 'skin') is a clade of euglenids, single-celled eukaryotes or protists belonging to the phylum Euglenozoa.

Spirocuta is a group of flagellates, unicellular eukaryotes or protists with one or two flagella for locomotion in the anterior region of the cell.

In particular, members of Spirocuta share a synapomorphy, or unique trait: their high number of strips (between 16 and 56) confers the cells with an immense flexibility, allowing them to actively stretch and deform.

[6][3] Spirocuta was first proposed by American protozoologist Thomas Cavalier-Smith in 2016, as a superclass uniting all those euglenids with more than 15 spirally arranged pellicle strips.

[7][2] In 2017, Stefan Paerschke and colleagues independently noticed the same clade through phylogenetic analyses, and named it Helicales in reference to the helical pellicle composed of spirally arranged strips.