- The three named genera of the family are apparently endemic to the southwestern North American craton.
- The identification of two named genera in a single organism presents a taxonomic dilemma.
- The cephalochordates include only about twenty species of two genera of organisms commonly called amphioxus.
- In addition, honeyeaters are known to forage on a range of plant families, genera and species at any one time, and do not rely on a single plant species for food.
- Both the genus and species name of this aggressive flycatcher are from the Latin word for tyrant.