Aquilonastra is a genus of small sea stars within the family Asterinidae. It has over twenty described species.
Aquilonastra has generally five rays, except fissiparous species which have five to eight ones. It looks like star as inter-radial margins are deeply incurved.
According to World Register of Marine Species and O'Loughlin & Rowe 2006:
Aquilonastra anomala (H.L. Clark, 1921)Aquilonastra batheri (Goto, 1914)Aquilonastra burtoni (Gray, 1840)Aquilonastra byrneae O'Loughlin & Rowe, 2006Aquilonastra cepheus (Muller & Troschel, 1842)Aquilonastra chantalae O'Loughlin & MacKenzie, 2013Aquilonastra colemani O'Loughlin & Rowe, 2006Aquilonastra conandae O'Loughlin & Rowe, 2006Aquilonastra corallicola (Marsh, 1977)Aquilonastra coronata (von Martens, 1866)Aquilonastra doranae O'Loughlin & Rowe, 2006Aquilonastra halseyae O'Loughlin & Rowe, 2006Aquilonastra heteractis (H.L. Clark, 1938)Aquilonastra iranica (Mortensen, 1940)Aquilonastra limboonkengi (Smith, 1927)Aquilonastra marshae O'Loughlin & Rowe, 2006Aquilonastra minor (Hayashi, 1974)Aquilonastra moosleitneri O'Loughlin & Rowe, 2006Aquilonastra oharai O'Loughlin & Rowe, 2006Aquilonastra richmondi O'Loughlin & Rowe, 2006Aquilonastra rosea (H.L. Clark, 1938)Aquilonastra rowleyi O'Loughlin & Rowe, 2006Aquilonastra samyni O'Loughlin & Rowe, 2006Aquilonastra scobinata (Livingstone, 1933)Aquilonastra shirleyae O'Loughlin, 2009Aquilonastra watersi O'Loughlin & Rowe, 2006Aquilonastra yairi O'Loughlin & Rowe, 2006
