Family Terminasteridae Gale, 2011

Terminasteridae Gale, 2011a: 92, fig. 8.

Diagnosis

Zorocallinids with extra-axial arm constructed of seven rows of ossicles organised with one row of radials, two rows of adradials, two rows of superomarginals and two rows of infromarginals; both marginal rows extend to arm tip.

Assigned genera

Alkaidia Blake & Reid, 1998 and Terminaster Hess, 1974 .

Remarks

The family Terminasteridae is sister group to the Eocene–Recent Zoroasteridae Sladen, 1889, which is widespread in bathyal to abyssal depths of the present-day oceans.