Family: Asteriidae
To arter i Norge som begge har fem armer: Vanlig korstroll og Ishavsstjerne.
Systematics :
| Kingdom | Animals (Animalia) | |||||
| Phylum | Echinoderms (Echinodermata) | |||||
| Klasse | Starfish (Asteroidea) | |||||
| Family | Asteriidae | |||||
| Genus | Asterias | |||||
| Species | Vanlig korstroll (Asterias rubens) | |||||
| Genus | Marthasterias | |||||
| Species | Piggkorstroll (Marthasterias glacialis) | |||||
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