| Annametra | |
|---|---|
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Echinodermata |
| Class: | Crinoidea |
| Order: | Comatulida |
| Family: | Antedonidae |
| Subfamily: | Antedoninae |
| Genus: | Annametra AH Clark, 1936 |
Annametra is a genus of crinoids in the family Antedonidae, subfamily Antedoninae (Norman, 1865), first described by Clark, A. H. in 1936. [1] [2]
There are two accepted species in the genus: [2]
Articulata are a subclass or superorder within the class Crinoidea, including all living crinoid species. They are commonly known as sea lilies or feather stars. The Articulata are differentiated from the extinct subclasses by their lack of an anal plate in the adult stage and the presence of an entoneural system. Articulata first appeared in the fossil record during the Triassic period although other, now extinct crinoid groups, originated in the Ordovician.
Comasteridae is a family of crinoids.
Antedonidae is a family of crinoids or feather stars in the phylum Echinodermata. Members of the family are unstalked and have ten feathery arms. They can move about freely and have clawed cirri to attach them temporarily to structures.
Antedon is a genus of sessile, stemless crinoids. The genus first appeared in the fossil record in the Cretaceous period.
Capillaster is a genus of crinoids. It contains the following species:
Davidaster is a genus of crinoids. According to the World Register of Marine Species, a number of species that originally were included in the genus Nemaster are now included in Davidaster. Members of this genus have wedge-shaped arms, except for the basal ones, often longer than they are wide. The mouth is off centre and there are no pinnule combs after pinnule 3. The primary comb has the teeth widely separated and confluent with the lateral edge of the segment.
Metacrinus is a genus of stalked crinoids in the family Isselicrinidae. Members of this genus live on hard surfaces in deeper parts of the ocean. The genus has extant species and is also represented in the fossil record. Members of the genus grow to a maximum height of 60 centimetres (24 in) and are found in the eastern Pacific Ocean from Japan to Australia.
Himerometra is a genus of crinoids belonging to the family Himerometridae.
Tropiometra is a genus of crinoids in the monotypic family Tropiometridae.
The elegant feather star is a species of crinoid in the family Tropiometridae.
Leptometra is a genus of free-swimming, stemless crinoids.
Isselicrinidae is one of four extant families of crinoids in the order Isocrinida.
Bathycrinus australis is a species of sea lily, a crinoid in the family Bathycrinidae. It is native to deep water in the Antarctic Ocean. It was initially identified as Bathycrinus aldrichianus by Philip Herbert Carpenter following the 1872-1876 HMS Challenger expedition. It was later distinguished as a new species by the American zoologist Austin Hobart Clark.
Comatulidae is a family of comatulid crinoids. Since 2015, it replaces the family Comasteridae.
Bathycrinus is a genus of crinoids.
Colobometridae is a family of crinoids belonging to the order Comatulida. Members of this order are known as feather stars.
Atelecrinidae is a family of crinoids or feather stars in the phylum Echinodermata. It was first described by Francis Arthur Bather in 1899.
Comanthus is a genus of crinoid echinoderms belonging to the family Comatulidae.
Zygometra is a genus of crinoids within the family Zygometridae. Members of this genus are found at depths of 10 to 162.5 meters in the Indo-Pacific around countries such as Australia, Indonesia, Malaysia and the Philippines.