Amphiura

Amphiura is a large genus of brittle stars (Ophiuroidea) found in oceans worldwide from tropics to Arctic and Antarctic regions.

Systematics and phylogeny
Amphiura is a large genus that is currently divided into the following six subgenera: Amphioplus, Amphiura, Fellaria, Ophionema, Ophiopelte and Ophiopeltis. The once used subgenus Acrocnida has been elevated to a genus rank. The fossil record of the genus dates back to the Turonian (Amphiura plana).

Species
Extant species include:


 * Amphiura acacia
 * Amphiura accedens
 * Amphiura acrisia
 * Amphiura adjecta
 * Amphiura aestuarii
 * Amphiura affinis
 * Amphiura africana
 * Amphiura agitata
 * Amphiura alba
 * Amphiura albella
 * Amphiura algida
 * Amphiura ambigua
 * Amphiura amokurae
 * Amphiura angularis
 * Amphiura annulifera
 * Amphiura anomala
 * Amphiura anster
 * Amphiura antarctica
 * Amphiura arcystata
 * Amphiura argentea
 * Amphiura aster
 * Amphiura atlantica
 * Amphiura atlantidea
 * Amphiura belgicae
 * Amphiura bellis
 * Amphiura benthica
 * Amphiura beringiana
 * Amphiura bidentata
 * Amphiura bihamula
 * Amphiura borealis
 * Amphiura bountyia
 * Amphiura brachyactis
 * Amphiura brevipes
 * Amphiura brevispina
 * Amphiura callida
 * Amphiura canadensis
 * Amphiura candida
 * Amphiura caparti
 * Amphiura capensis
 * Amphiura carchara
 * Amphiura carnea
 * Amphiura catephes
 * Amphiura celata
 * Amphiura ceramis
 * Amphiura cherbonnieri
 * Amphiura chiajei
 * Amphiura clausadae
 * Amphiura coacta
 * Amphiura commutata
 * Amphiura complanata
 * Amphiura concinna
 * Amphiura concolor
 * Amphiura confinis
 * Amphiura consors
 * Amphiura constricta
 * Amphiura corona
 * Amphiura crassipes
 * Amphiura crispa
 * Amphiura crossota
 * Amphiura crypta
 * Amphiura dacunhae
 * Amphiura debilis
 * Amphiura deficiens
 * Amphiura deichmanni
 * Amphiura dejecta
 * Amphiura dejectoides
 * Amphiura delamarei
 * Amphiura demissa
 * Amphiura diacritica
 * Amphiura diastata
 * Amphiura diducta
 * Amphiura digitula
 * Amphiura dino
 * Amphiura diomedeae
 * Amphiura dispar
 * Amphiura divaricata
 * Amphiura dolia
 * Amphiura duncani
 * Amphiura ecnomiotata
 * Amphiura elandiformis
 * Amphiura eugeniae
 * Amphiura eugenioides
 * Amphiura exigua Verrill
 * Amphiura fasciata
 * Amphiura fibulata
 * Amphiura ficta
 * Amphiura filiformis
 * Amphiura flexuosa
 * Amphiura florifera
 * Amphiura fragilis
 * Amphiura frigida
 * Amphiura gastracantha
 * Amphiura glabra
 * Amphiura goniodes
 * Amphiura griegi
 * Amphiura gymnogastra
 * Amphiura gymnopora
 * Amphiura heptacantha
 * Amphiura heraldica
 * Amphiura hilaris
 * Amphiura immira
 * Amphiura incana
 * Amphiura inepta
 * Amphiura ingolfiana
 * Amphiura inhacensis
 * Amphiura instans
 * Amphiura iridoides
 * Amphiura joubini
 * Amphiura kalki
 * Amphiura kandai
 * Amphiura kinbergi
 * Amphiura koreae
 * Amphiura lanceolata
 * Amphiura latispina
 * Amphiura leptodoma
 * Amphiura leptotata
 * Amphiura leucaspis
 * Amphiura levidevaspis
 * Amphiura linearis
 * Amphiura lorioli
 * Amphiura luetkeni
 * Amphiura lunaris
 * Amphiura lymani
 * Amphiura macrostyalia
 * Amphiura maculata
 * Amphiura madecassae
 * Amphiura magellanica
 * Amphiura magnisquama
 * Amphiura maxima
 * Amphiura mediterranea
 * Amphiura megalaspi
 * Amphiura micra
 * Amphiura micraspis
 * Amphiura microplax
 * Amphiura microsoma
 * Amphiura modesta
 * Amphiura monorima
 * Amphiura morosa
 * Amphiura muelleri
 * Amphiura multiremula
 * Amphiura multispina
 * Amphiura murex
 * Amphiura nannodes
 * Amphiura nociva
 * Amphiura norae
 * Amphiura notacantha
 * Amphiura octacantha
 * Amphiura otteri
 * Amphiura pachybactra
 * Amphiura papillata
 * Amphiura parviscutata
 * Amphiura perita
 * Amphiura plantei
 * Amphiura poecila
 * Amphiura polita
 * Amphiura polyacantha
 * Amphiura praefecta
 * Amphiura princeps
 * Amphiura proposita
 * Amphiura protecta
 * Amphiura psilopora
 * Amphiura ptena
 * Amphiura pusilla
 * Amphiura pycnostoma
 * Amphiura rathbuni
 * Amphiura reloncavii
 * Amphiura repens
 * Amphiura retusa
 * Amphiura richardi
 * Amphiura sarsi
 * Amphiura scabiuscula
 * Amphiura scabriuscula
 * Amphiura sculpta
 * Amphiura securigera
 * Amphiura semiermis
 * Amphiura seminuda
 * Amphiura senegalensis
 * Amphiura septa
 * Amphiura septemspinosa
 * Amphiura serpentina
 * Amphiura sexradiata
 * Amphiura simonsi
 * Amphiura sinicola
 * Amphiura spinipes
 * Amphiura stepanovi
 * Amphiura stictacantha
 * Amphiura stimpsoni
 * Amphiura subtilis
 * Amphiura sundevalli
 * Amphiura syntaracha
 * Amphiura tenuis
 * Amphiura tessellata
 * Amphiura trachydisca
 * Amphiura triaina
 * Amphiura trisacantha
 * Amphiura tumulosa
 * Amphiura tutanekai
 * Amphiura uncinata
 * Amphiura ungulata
 * Amphiura unicinata
 * Amphiura ushakovi
 * Amphiura vadicola
 * Amphiura velox
 * Amphiura verrilli
 * Amphiura verticillata