Actinometra Müller, 1841 accepted as Comatula Lamarck, 1816 (source of synonymy)
Comasteracea AH Clark, 1908 accepted as Comatuloidea Fleming, 1828 (original description)
Comasteridae AH Clark, 1908 accepted as Comatulidae Fleming, 1828 (original description)
Comasterini AH Clark, 1908 (original description)
Compsometra AH Clark, 1908 accepted as Antedon de Fréminville, 1811 (original description)
Himerometroidea AH Clark, 1908 (original description)
Isometra AH Clark, 1908 (original description)
Leptometra AH Clark, 1908 (original description)
Leptometra celtica (M'Andrew & Barrett, 1857) (new combination reference)
Oligometra AH Clark, 1908 (original description)
Oligometra serripinna (Carpenter, 1881) (source of synonymy)
Pentametrocrinidae AH Clark, 1908 (original description)
Pentametrocrinus AH Clark, 1908 (original description)
Pentametrocrinus atlanticus (Perrier, 1883) (source of synonymy)
Pentametrocrinus varians (Carpenter, 1882) (source of synonymy)
Thalassometridae AH Clark, 1908 (original description)
Thaumatometra AH Clark, 1908 (original description)
Thaumatometra abyssorum (Carpenter, 1888) (new combination reference)
Tropiometridae AH Clark, 1908 (original description)