Antedonidae with centrodorsal conical, not higher than wide, with sockets in 10 columns, separated interradially by ... [details]
Same as genus. [details]
Antedoninae with second pinnule much longer than either first or third. [details]
Antedonidae with centrodorsal slightly higher than wide, with sockets in 10 columns, separated interadially by a ... [details]
Antedoninae with cirri short and stout, strongly recurved distally. First pinnule with 18-35 pinnulars; pinnulars ... [details]
Antedoninae with centrodorsal much broader than high; cirrus sockets irregular or alternating in arrangement. First ... [details]
Heliometrinae with brachials having high median keel. First pinnule much larger than second pinnule. [details]
Small Notocrinoidea with centrodorsal low rounded to almost conical; aboral apex more or less flattened, rugose. ... [details]
Antedoninae with first and second pinnules with elongate pinnulars; first pinnule either shorter or longer than ... [details]
A genus of Asterometridae with cirrals lacking constriction or distal projection. As many as 16 arms. Proximal ... [details]
Antedonidae with centrodorsal conical, as wide across the base as high, or wider; with cirrus sockets shallow, ... [details]
Centrodorsal conical, with narrow centrodorsal cavity; adoral rim with 5 interradial grooves to accommodate flat, ... [details]
Antedonidae with centrodorsal conical, much higher than wide, with sockets in 10 columns separated ... [details]
Antedonidae with centrodorsal conical, low hemispherical or almost discoidal, with large cavity. Cirrus sockets ... [details]
Bathymetrinae with longest cirrals having L/W ratio up to 3; distal cirrals not longer than broad. First pinnule ... [details]
Calometridae with arms 10-15. Secundibrachials of 2 ossicles. Radials separating adjacent primibrachials narrowly ... [details]
Tropiometroidea with centrodorsal discoidal to low hemispherical with broad, flattened, cirrus-free aboral apex. No ... [details]
Centrodorsal conical, higher or lower than wide, without interradial ridges, grooves, or spaces, with sockets in 10 ... [details]
Heliometrinae with centrodorsal hemispherical or low rounded conical, with 50-100 crowded sockets. Cirri slender, ... [details]
Articulata with postlarval columnals joined by synarthrial articulations; column persisting in adult without true ... [details]
Same as superfamily. [details]
Centrodorsal thick to thin discoidal or pentagonal, rarely stellate; aboral apex broad, cirrus-free, flat or ... [details]
Antedoninae with Numerous cirri of 12-14 mostly elongate segments. First 4 (sometimes first 2-3) pinnules with ... [details]
Antedonidae with Centrodorsal conical, lower than wide, without interradial ridges, grooves, or spaces, with as ... [details]
Antedoninae with cirri rarely 40, with as many as 17 cirrals with distal ends produced and overlapping; distal ... [details]
Antedonidae with centrodorsal rounded conical, with sockets in 10 crowded columns of 2 or 3 each, without ... [details]
Perometrinae with proximal brachials not laterally flattened, with tuberculate margins. Disk bearing rounded ... [details]
Antedoninae with first 3 pinnules progressively smaller; first pinnule with 10-21 segments; second with fewer segments. [details]
Antedoninae with Cirri rarely 40 (as many as 60), of 16-33 cirrals with distal ends produced and overlapping; ... [details]
Antedonidae with centrodorsal conical, with sockets in 10 or 15 (rarely 20) irregular crowded columns not separated ... [details]
Bathymetrinae with Ccntrodorsal conical with 30 or more cirrus sockets. Peripheral cirri with 21-36 cirrals; ... [details]
Heliometrinae with centrodorsal subconical to almost hemispherical, commonly low or with an aboral depression. ... [details]
Calometridae with radials separating adjacent primibrachs very narrowly or not at all. As many as 20 arms. ... [details]
Bathymetrinae with centrodorsal conical or convex conical with as many as 80 sockets. Cirri with as many as 33 ... [details]
Antedonidae with centrodorsal rounded, low hemispheric or conical, usually with cirrus-free aboral apex, sometimes ... [details]
Comatulida with centrodorsal low hemispherical to discoidal. No aboral star. Cirrus sockets without distinct ... [details]
Thalassometridae with as many as 22 arms; brachitaxes all of 2 brachials; pinnulars of genital pinnules expanded ... [details]
Antedonidae with centrodorsal conical, slightly wider than high, with sockets in 20 columns, not separated into ... [details]
Small Perometrinae with first interior and exterior pinnules both absent. [details]
Antedonidae with centrodorsal conical, slightly wider than high, with ~50 sockets in 15 crowded columns. Largest ... [details]
Antedonidae with centrodorsal conical, as wide as high or low and truncated, with sockets in 10 or 15 crowded ... [details]
Mariametroidea with adoral side of centrodorsal with interradial ridges and with undivided coelomic impression in ... [details]
Antedoninae with distal edges of brachials thickened. First 3 pinnules progressively smaller; first pinnule with at ... [details]
Very small Antedonidae with well-developed combs as far as second pinnule, composed of 3 segments, each with a ... [details]
Perometrinae with proximal brachials not laterally flattened, with tuberculate margins. Disk naked. First interior ... [details]
Calometridae with Radials separating adjacent primibrachs widely. As many as 40 arms. All brachitaxes of 2 ... [details]
Bathymetrinae with centrodorsal hemispherical with ~30 sockets. Cirri with as many as 30 segments, the longest less ... [details]
Moderate to very large Notocrinoidea with centrodorsal commonly wider and aborally more flattened or concave in ... [details]
Same as family. [details]
Bathymetrinae with centrodorsal flattened hemispherical, with as many as 30 sockets. Cirri stout and flexible with ... [details]
Calometridae with Rrdials not separating adjacent brachitaxes. Arms 15-20. All brachitaxes of 2 ossicles. Adjacent ... [details]
Perometrinae with proximal brachials with smooth, flattened sides apposed against those of adjacent ray. ... [details]
Antedonidae with centrodorsal rounded conical; aboral polerounded, commonly rugose or tuberculate; cirrus-free ... [details]
Bathymetrinae with centrodorsal low subconical to hemispherical, with up to 50 sockets. Cirri with as many as 25 ... [details]
Antedonidae with centrodorsal conical, approximately as wide as high, with 15-20 columns of cirrus sockets, not ... [details]
Antedonidae with radials 10, with one pair of nerve canals open medially. Arms 20; each ray divided at primibrachial 2. [details]
A genus of Asterometridae with proximal cirrals constricted with projecting distal margin commonly developed as ... [details]
Calometridae with as many as 17 arms. Primibrachs united by close synarthry. Secundibrachs 4 (3+4) or rarely ... [details]
Bourgueticrinina with cup conical; 5 basals and 5 radials almost equal in height. Synostosis between primibrachials ... [details]
A genus of Asterometridae with cirri sometimes as long as arms; cirrals lacking aboral spine and opposing spine; ... [details]
Antedonidae with centrodorsal hemispherical to rounded subconical, with 80+ sockets; cirri typically of 25-30 ... [details]
Bathymetrinae with centrodorsal low subconical or hemispherical to almost discoidal with 25-60 sockets. Cirri of ... [details]
Bathymetrinae with centrodorsal hemispherical or rounded conical, with 30-50 sockets. Cirri with 18-37 segments, ... [details]
Antedoninae with distal ends of cirrals not produced and overlapping. Third pinnule longest and stoutest. [details]
Bathymetrinae with centrodorsal rounded conical to hemispherical, with as many as 65 sockets arranged irregularly ... [details]
A family of Tropiometroidea with centrodorsal large, thick discoidal to low columnar with large, flattened, ... [details]