Cretacimermis
Cretacimermis is a collective group genus of fossil mermithid nematodes from the Cretaceous that cannot be placed in extant genera.
Species
Species:| Scientific name | Age | Type locality | Country | Host | Notes |
| Cretacimermis adelphe Luo & Poinar in Luo et al., 2023 | Late Cretaceous | Burmese amber |  Myanmar |