''Antrechinus mortenseni'' is a species of

sea urchin Sea urchins () are spiny, globular echinoderms in the class Echinoidea. About 950 species of sea urchin live on the seabed of every ocean and inhabit every depth zone from the intertidal seashore down to . The spherical, hard shells (tests) of ...

of the family

Urechinidae Urechinidae is a family of echinoderms belonging to the order Holasteroida Holasteroida is an order of irregular sea urchins. Characteristics These irregular sea urchins are characterized by a particularly marked bilateral symmetry, includ ...

. Their armour is covered with spines. ''Antrechinus mortenseni'' was first scientifically described in 1990 by David & Mooi.Kroh, A. (2010). ''Antrechinus mortenseni'' (David & Mooi, 1990). In: Kroh, A. & Mooi, R. (2010
World Echinoidea Database
at the World Register of Marine Species.

References

Urechinidae Animals described in 1990 {{Echinoidea-stub