Involved in pre-mRNA splicing (By similarity). Functions in association with cyclin-dependent kinases (CDKs) (By similarity). Involved in induction of expression of heat shock protein hsp-16.2 in response to heat shock (PubMed:15611166). Plays a role in male tail development, perhaps acting together with cell cycle regulators cdc-25.2, cdk-1, cyb-3, and cyd-1 (PubMed:27923661). RNAi-mediated knockdown causes abnormal male tail morphology. Belongs to the cyclin family.