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subclasses of seastar

Mediaster aequalis

Mediaster aequalis

Mediaster aequalis
Mediaster aequalis, one of the smaller sea stars, ranging in size from three to seven inches
Linckia laevigata

Linckia laevigata

Linckia laevigata, a species of sea star in the shallow waters of tropical Indo-Pacific
Nidorellia armata

Nidorellia armata

Nidorellia armata
Nidorellia armata, a species of starfish
Northern Pacific seastar

Northern Pacific seastar

Asterias amurensis, commonly referred to as the northern Pacific seastar, an invasive species in Australia, and native to the coasts of northern China, North Korea, South Korea, Russia and Japan
Ochre Sea Star

Ochre Sea Star

Ochre Sea Star
Pisaster ochraceus, generally known as the Ronald Reagan Sea Star or Ochre Sea Star, a common starfish found among the waters of the Pacific Ocean
Notomyotida

Notomyotida

Notomyotida
Notomyotida, an order of sea stars containing at least 75 species
Linckia

Linckia

Linckia
Linckia, a genus of sea star
Leptasterias pusilla

Leptasterias pusilla

Leptasterias pusilla
Leptasterias pusilla, a small, six-rayed sea star
Giant sea star

Giant sea star

Giant sea star, Pisaster giganteus, a species of sea star that lives along the western coast of North America from Southern California to British Columbia
Forcipulatida

Forcipulatida

Forcipulatida, an order of sea stars
Goniasteridae

Goniasteridae

Goniasteridae
Goniasteridae, a large family of sea stars
Henricia

Henricia

Henricia
Henricia, a genus of slender-armed sea stars belonging to the family Echinasteridae
Leptasterias aequalis

Leptasterias aequalis

Leptasterias aequalis
Leptasterias aequalis, common names little six-rayed seastar or six-armed star, a species of starfish
Ophidiasteridae

Ophidiasteridae

Ophidiasteridae
Ophidiasteridae, a family of sea stars with 31 genera
Oreaster

Oreaster

Oreaster
Oreaster, a genus of sea stars in the family Oreasteridae
Red-knobbed starfish

Red-knobbed starfish

Red-knobbed starfish
Red-knobbed Starfish, also known as the red spine star, African sea star, and the African red knob sea star, a species of starfish
Pseudarchaster myobrachius

Pseudarchaster myobrachius

Pseudarchaster myobrachius
Pseudarchaster myobrachius, a species of starfish
Spinulosida

Spinulosida

Spinulosida
Spinulosida, an order of sea stars containing at least 120 species
sunflower starfish

sunflower starfish

sunflower sea star, a fat and large predatory sea star usually with 100 limbs called rays
Valvatida

Valvatida

Valvatida, an order of sea star in the class Asteroidea, which contains 695 species in 165 genera in 14 families
Protoreaster nodosus

Protoreaster nodosus

Protoreaster nodosus, a species of sea star found in the warm, shallow waters of the Indo-Pacific region
Pisaster brevispinus

Pisaster brevispinus

Pisaster brevispinus
Pisaster brevispinus, commonly called the Pink Sea Star, Giant Pink Sea Star, or Short-spined Sea Star, a Pacific Ocean sea star
Patiriella

Patiriella

Patiriella
Patiriella, commonly known as carpet sea star, a genus of sea stars of the family Asterinidae
Oreaster reticulatus

Oreaster reticulatus

Oreaster reticulatus
Oreaster reticulatus, commonly known as red cushion sea star, a species of marine invertebrate, a starfish in the family Oreasteridae
Patiriella regularis

Patiriella regularis

Patiriella regularis, or New Zealand common cushion star, a sea star of the family Asterinidae, endemic to New Zealand
Paxillosida

Paxillosida

Paxillosida
Paxillosida, a large order of sea stars
Pisaster

Pisaster

Pisaster
Pisaster, a genus of Pacific sea stars that includes three species, P. brevispinus, P. giganteus, and P. ochraceus
Echinasteridae

Echinasteridae

Echinasteridae, a family of sea stars in the order Spinulosida
Linckia multifora

Linckia multifora

Linckia multifora
Linckia multifora, a variously colored starfish in the family Ophidiasteridae that is found in the Indian Ocean and Red Sea
Asterinidae

Asterinidae

Asterinidae
Asterinidae, a family of sea stars in the order Valvatida
Brisingida

Brisingida

Brisingida, an order of deep-sea dwelling sea stars
Asterias

Asterias

Asterias, a genus of the Asteriidae family of sea stars
Choriaster granulatus

Choriaster granulatus

Choriaster granulatus, commonly known as the granulated sea star, and also cushion seastar, and doughboy star, a species of starfish
Astropecten

Astropecten

Astropecten
Astropecten, a genus of sea star of the family Astropectinidae
Astropecten aranciacus

Astropecten aranciacus

Astropecten aranciacus
Astropecten aranciacus, a sea star of the family Astropectinidae
Astropecten aurantciacus

Astropecten aurantciacus

Astropecten aurantciacus
Astropecten aurantciacus, a starfish of the family Astropectinidae
Astropecten polyacanthus

Astropecten polyacanthus

Astropecten polyacanthus
Astropecten polyacanthus, or the comb star, a sea star of the family Astropectinidae
Astropectinidae

Astropectinidae

Astropectinidae
Astropectinidae, a family of sea stars in the order Paxillosida
Common starfish

Common starfish

common sea star, a most common and familiar sea star in the north-east Atlantic
Asteriidae

Asteriidae

Asteriidae, a family of Asteroidea in the order Forcipulatida
Coscinasterias calamaria

Coscinasterias calamaria

Coscinasterias calamaria, or the eleven-armed sea star, a sea star of the family Asteriidae, endemic to southern Australia and New Zealand
crown-of-thorns starfish

crown-of-thorns starfish

crown-of-thorns starfish, a large nocturnal sea star that preys upon coral polyps
Asteriacites

Asteriacites

Asteriacites, a name given to five-rayed trace fossils found in marine sedimentary rocks
Patiriella parvivipara, an Australian species of sea star
Asteropseidae
Asteropseidae, a family of sea stars
Pentaster
Pentaster, a genus of sea stars in the family Oreasteridae
Stephanasterias albula
Stephanasterias albula, a species of starfish in the family Asteriidae
Patiriella mortenseni
Patiriella mortenseni, a sea star of the family Asterinidae endemic to New Zealand
Anthenea
Anthenea, a genus of sea stars in the family Oreasteridae
Patiriella brevispina, also known as purple seastar, an Australian species of sea star
Xyloplax janetae
Xyloplax janetae, a Xyloplax of the family Xyloplacidae
Patiriella calcar
Patiriella calcar, commonly known as Carpet Sea Star or Cushion Sea Star or Eight-armed Sea Star, an Australian species of sea star
Parvulastra exigua, a species of sea star
Stegnaster wesseli
Stegnaster wesseli, a sea star of the family Echinasteridae, found around the Bahamas and in the Caribbean, from Florida to the Yucatan including the Gulf of Mexico
Anthaster valvulatus
Anthaster valvulatus, a species of sea star in the family Orestieridae
Patiriella gunnii
Patiriella gunnii, an Australian species of sea star.It has six arms and which can be any colour
Poraster superbus
Poraster superbus, a species of sea star in the family Orestieridae
Reef starfish
Reef starfish, a species of starfish found in the South Pacific Ocean around New Zealand
Stegnaster
Stegnaster, a genus of sea stars of the family Echinasteridae, endemic to New Zealand
rose sea star
rose sea star, a species of sea star of the family Ophidiasteridae
Sclerasterias
Sclerasterias, a genus of starfish in the family Asteriidae
Sea daisy (Sea daisies make up an unusual group of deep-sea taxa belonging to the phylum Echinodermata, with three species described in the genus Xyloplax)
Stegnaster inflatus
Stegnaster inflatus, or the New Zealand cushion star, a sea star of the family Echinasteridae, endemic to New Zealand
Pycnopodia
Pycnopodia, a fat piggall of sea stars in the family Asteriidae
Protoreaster
Protoreaster, a genus of sea stars in the family Oreasteridae
Solaster paxillatus
Solaster paxillatus, a species of starfish
Asterina phylactica
Asterina phylactica, a species of sea star
Pseudanthenea grayi
Pseudanthenea grayi, a species of sea star in the family Orestieridae
Astropecten bispinosus
Astropecten bispinosus, a sea star of the family Astropectinidae
Platanaster, the taxon, a type of Starfish and Echinoderm
Odontaster
Odontaster, a genus of sea stars
Henricia leviuscula
Henricia leviuscula, commonly called the Pacific blood star, it, a species of starfish found along the Pacific coast of North America
Heliaster solaris
Heliaster solaris commonly known as 24-rayed Sunstar, a possible extinct Sea star which was known from the waters near Española Island in the Galápagos Islands
Halityle regularis
Halityle regularis, a species of sea star in the family Orestieridae
Japanese sea star
Japanese sea star, a sea star originally from Japan and recently introduced to Tasmania
Ceramaster patagonicus
Ceramaster patagonicus, a species of sea star
Linckia columbiae
Linckia columbiae, a species of starfish in the family Ophidiasteridae that is found off the coast of California and adjacent areas of the semi-tropical north east Pacific Ocean
Ceramaster
Ceramaster, a genus of cushion stars
Hacelia attenuata
Hacelia, a genus of sea star
Gymnanthenea
Gymnanthenea, a genus of sea stars in the family Oreasteridae
Culcita schmideliana, a species of pin-cushion star
Culcita novaeguineae
Culcita novaeguineae, a species of starfish
Culcita
For the fern genus see: Culcita Culcita, a genus of cushion stars
Coscinasterias tenuispina
Coscinasterias tenuispina, a starfish in the family Asteriidae
Fragile Rainbow Star
Fragile Rainbow Star or Astrometis sertulifera, an only uncontested species of sea star in the genus Astrometis
Goniodiscaster
Goniodiscaster, a genus of sea stars in the family Oreasteridae
Coscinasterias
Coscinasterias, a genus of sea stars of the family Asteriidae
Linckia guildingi
Linckia guildingi, the taxon, a type of animal and Starfish
Acheronaster tumidus
Acheronaster tumidus, a species of sea star in the family Orestieridae
Astrosarkus idipi
Astrosarkus idipi, a species of sea star in the family Orestieridae
Bat star
bat star, also known as Sea bat, Webbed star,Bat Man and Broad-disk star, an echinoderm of class Asteroidea
Neoferdina
Neoferdina, a genus of starfish in the family Goniasteridae
Crown-of-Thorns Starfish, a large nocturnal sea star that preys upon coral polyps
Odontaster validus
Odontaster validus, a species of starfish in the family Odontasteridae
Astropecten jonstoni
Astropecten jonstoni, a sea star of the family Astropectinidae
Odontasteridae
Odontasteridae, a family of sea stars
Nectriaster monacanthus
Nectriaster monacanthus, a species of sea star in the family Orestieridae
Nectriaster monacanthus
Nectriaster monacanthus, a species of sea star in the family Orestieridae
Luidia sarsi
Luidia sarsi, a species of starfish
Luidia ciliaris
Luidia ciliaris or the seven armed starfish, a species of starfish in the family Luidiidae
Marocaster
Marocaster, an extinct genus of sea stars in the family Goniasteridae
Bothriaster primigenius
Bothriaster primigenius, a species of sea star in the family Orestieridae
Nectriaster monacanthus
Nectriaster monacanthus, a species of sea star in the family Orestieridae
Monachaster sanderi
Monachaster sanderi, a species of sea star in the family Orestieridae
Astropecten irregularis
Astropecten irregilaris, a sea star of the family Astropectinidae
show all (100 more) ...
What is a subclass (child class) of (shares all members with by definition) starfish or sea stars, echinoderms belonging to the class Asteroidea?
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External web pages (using standard web search):

... the second largest group of Echinoderms after the brittle stars (Subclass Ophiuroidea). Features: Almost everyone knows what a sea star looks like!
The ITIS, which I suppose is authoritative, classifies Asteroidea as a subclass of the ... Oppose Sea star is a better name, and is common enough that it isn't out of left field.
Asterias amurensis (northern Pacific seastar) has the potential to establish large populations in new areas. Estimates made in Port Philip Bay (where they were first detected ...
All members of this subclass are marine and live from the shallow subtidal areas to the deep ... Superficially it resembles an Asteroidean sea star in that it has an oral disk and arms.
Subclass Asteroidea. Order Spinulosida. The Subclass Asteroidea has three Order of which the ... Key to Southern California Sea Star Species: 1. Has five thick arms; webbed juncture ...

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