Dendrogaster antarctica is an endoparasitic ascothoracid barnacle of Dendrogastridae that parasitizes on the common Antarctica cushion star, Odontaster validus.

[2] It has been found in several sites in Antarctica and was originally discovered by Mark J. Grygier in 1980.

[3] He then released an article in 1987 explaining the characteristics of a female member of the species.

[5] It has extremely small sperm.

This sperm is the most primitive yet found in crustacea.