Hathrometra AH Clark, 1908 (original description)
Isometra AH Clark, 1908 (original description)
Pentametrocrinidae AH Clark, 1908 (original description)
Pentametrocrinus AH Clark, 1908 (original description)
Thalassometridae AH Clark, 1908 (original description)
Thaumatometra AH Clark, 1908 (original description)
Thaumatometra abyssorum (Carpenter, 1888) (new combination reference)
Thaumatometra exigua (Carpenter, 1888) accepted as Phrixometra exigua (Carpenter, 1888) (new combination reference)
Thaumatometra hirsuta (Carpenter, 1888) accepted as Eumorphometra hirsuta (Carpenter, 1888) (new combination reference)
Thaumatometra remota (Carpenter, 1888) accepted as Tonrometra remota (Carpenter, 1888) (new combination reference)