List: word usually written using kana alone

usually written using kana alone  noun  noun (generic) 

• lancelet, amphioxus

usually written using kana alone  noun  noun (generic) 

• kangaroo rat (of North America; any rodent of genus Dipodomys)

usually written using kana alone  noun  noun (generic) 

• rat kangaroo (any marsupial of family Potoroidae, incl. bettongs and potoroos)

usually written using kana alone  noun  noun (generic) 

• bowhead whale (Balaena mysticetus), Greenland right whale

usually written using kana alone  noun  noun (generic) 

• North Atlantic right whale (Eubalaena glacialis)

usually written using kana alone  noun  noun (generic) 

• southern right whale (Eubalaena australis)

usually written using kana alone  noun  noun (generic) 

• passenger pigeon (Ectopistes migratorius)

usually written using kana alone  noun  noun (generic) 

• Steller's sea cow (Hydrodamalis gigas)

usually written using kana alone  noun  noun (generic) 

• greater bandicoot rat (Bandicota indica)

usually written using kana alone  noun  noun (generic) 

• Epiophlebia superstes (species of living-fossil dragonfly endemic to Japan)