Holasteroida
Sign in to saveHolasteroida is an order of irregular sea urchins.
Species
ブンブクモドキ目
ORDER
- KingdomAnimalia
- PhylumEchinodermata
- ClassEchinoidea
- OrderHolasteroida
Habitatmarine
via GBIF
Wikidata facts
- Image
- MHNT - Hemipneustes pyrenaicus - 1.jpg
Show 2 more facts
- taxon name
- Holasteroida
- Commons category
- Holasteroida
Sources (1)
via Wikidata · CC0
~2 min read
Article
3 sectionsContents
- Characteristics
- List of families
- References
Holasteroida is an order of irregular sea urchins.
== Characteristics == thumb|upright=1.1|Ceratophysa ceratopyga by A. Agassiz (1881) These irregular sea urchins are characterized by a particularly marked bilateral symmetry, including for the apical system, which is highly elongated. In some contemporary abyssal groups such as Pourtalesiidae, some species are even bottle-shaped. The mouth (peristome) does not contain an Aristotle's lantern. The anus (periproct) has migrated towards the periphery of the test. The plastron is never amphisternous.
Connections
Echinoidea
Entity
Hemipneustes
Entity
Animalia
Entity
Wikidata
Entity
taxonomy
Entity
Cretaceous
Entity
Echinodermata
Entity
Jurassic
Entity
Triassic
Entity
Cambrian
Entity
Devonian
Entity
Permian
Entity
Silurian
Entity
Carboniferous
Entity
Ordovician
Entity
Precambrian
Entity
Neogene
Entity
Paleogene
Entity
National Center for Biotechnology Information
Entity
Q82486
Entity