Definition that contains missing link
- mastotermes darwiniensis Australian termite; sole living species of Mastotermes; called a living fossil; apparent missing link between cockroaches and termites
- onychophora enigmatic small elongated wormlike terrestrial invertebrates of damp dark habitats in warm regions; distinct from the phylum Annelida; resemble slugs with legs and are sometimes described as the missing link between arthropods and annelids
- class onychophora enigmatic small elongated wormlike terrestrial invertebrates of damp dark habitats in warm regions; distinct from the phylum Annelida; resemble slugs with legs and are sometimes described as the missing link between arthropods and annelids