C. arenaria
# C. arenaria

C. arenaria may refer to:

* Carex arenaria, the sand sedge, a plant species
* Catinella arenaria, the sandbowl snail, a small air-breathing land snail species
* Cicindela arenaria, a ground beetle species native to the Palearctic Europe
* Croitana arenaria, the inland sand-skipper, a butterfly species endemic to the Northern Territory and South Australia
