Actinometra Müller, 1841 accepted as Comatula Lamarck, 1816 (source of synonymy)
Bathymetra AH Clark, 1908 (original description)
Bathymetra abyssicola (Carpenter, 1888) (new combination reference)
Charitometra sclateri (Bell, 1905) accepted as Glyptometra sclateri (Bell, 1905) (source of synonymy)
Coccometra AH Clark, 1908 (original description)
Coccometra hagenii (Pourtalès, 1868) (source of synonymy)
Coccometra nigrolineata AH Clark, 1918 (original description)
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)
Compsometra loveni (Bell, 1882) accepted as Antedon loveni Bell, 1882 (not Bell, 1884) (new combination reference)
Compsometra serrata (AH Clark, 1908) accepted as Antedon serrata AH Clark, 1908 (new combination reference)
Erythrometra AH Clark, 1908 (original description)
Erythrometra ruber AH Clark, 1909 accepted as Erythrometra rubra (AH Clark, 1907) (additional source)
Eudiocrinus variegatus AH Clark, 1908 (original description)
Hathrometra AH Clark, 1908 (original description)
Hathrometra dentata (Say, 1825) accepted as Hathrometra tenella (Retzius, 1783) (new combination reference)
Hathrometra prolixa (Sladen, 1881) accepted as Poliometra prolixa (Sladen, 1881) (new combination reference)
Hathrometra sarsii (Düben & Koren, 1846) accepted as Hathrometra tenella (Retzius, 1783) (new combination reference)
Hathrometra tenella (Retzius, 1783) (new combination reference)
Himerometroidea AH Clark, 1908 (original description)
Hypalometra AH Clark, 1908 (original description)
Iridometra adrestine (AH Clark, 1907) (new combination reference)
Iridometra briseis (AH Clark, 1907) accepted as Dorometra briseis (AH Clark, 1907) (basis of record)
Iridometra minuta (AH Clark, 1907) accepted as Annametra minuta AH Clark, 1907 (new combination reference)
Iridometra nana (Hartlaub, 1890) accepted as Dorometra nana (Hartlaub, 1890) (new combination reference)
Iridometra parvicirra (Carpenter, 1888) accepted as Dorometra parvicirra (Carpenter, 1888) (new combination reference)
Iridometra psyche accepted as Andrometra psyche (AH Clark, 1908) (new combination reference)
Isometra AH Clark, 1908 (original description)
Isometra angustipinna (Carpenter, 1888) (source of synonymy)
Leptometra AH Clark, 1908 (original description)
Leptometra celtica (M'Andrew & Barrett, 1857) (new combination reference)
Leptometra phalangium (Müller, 1841) (new combination reference)
Oligometra AH Clark, 1908 (original description)
Oligometra adeonae (Lamarck, 1816) accepted as Oligometrides adeonae (Lamarck, 1816) (source of synonymy)
Oligometra bidens (Bell, 1884) accepted as Oligometrides adeonae (Lamarck, 1816) (source of synonymy)
Oligometra carpenteri (Bell, 1884) (source of synonymy)
Oligometra japonica (Hartlaub, 1890) accepted as Iconometra japonica (Hartlaub, 1890) (source of synonymy)
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 japonicus (Carpenter, 1882) (source of synonymy)
Pentametrocrinus semperi (Carpenter, 1882) (source of synonymy)
Pentametrocrinus tuberculatus (AH Clark, 1907) (source of synonymy)
Pentametrocrinus varians (Carpenter, 1882) (source of synonymy)
Thalassometra compressa (Carpenter, 1888) accepted as Parametra compressa (Carpenter, 1888) (source of synonymy)
Thalassometra flava (Koehler, 1895) accepted as Koehlermetra porrecta (Carpenter, 1888) (source of synonymy)
Thalassometra magnicirra (Bell, 1905) accepted as Crotalometra magnicirra (Bell, 1905) (source of synonymy)
Thalassometra orion (AH Clark, 1907) accepted as Parametra orion (AH Clark, 1907) (source of synonymy)
Thalassometra porrecta (Carpenter, 1888) accepted as Koehlermetra porrecta (Carpenter, 1888) (source of synonymy)
Thalassometridae AH Clark, 1908 (original description)
Thaumatometra AH Clark, 1908 (original description)
Thaumatometra abyssorum (Carpenter, 1888) (new combination reference)
Thaumatometra alternata (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 isis (AH Clark, 1907) (new combination reference)
Thaumatometra longipinna (Carpenter, 1888) accepted as Phrixometra longipinna (Carpenter, 1888) (new combination reference)
Thaumatometra parvula (Hartlaub, 1895) accepted as Fariometra parvula (Hartlaub, 1895) (new combination reference)
Thaumatometra remota (Carpenter, 1888) accepted as Tonrometra remota (Carpenter, 1888) (new combination reference)
Thysanometra tenuicirra (Carpenter, 1888) (source of synonymy)
Tropiometridae AH Clark, 1908 (original description)