# 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