Eleutherozoa - Wikipedia
WEBEleutherozoa is a proposed subphylum of echinoderms. They are mobile animals with the mouth directed towards the substrate. They usually have a madreporite, tube feet, and moveable spines of some sort. It includes all living echinoderms except for crinoids.
9.21: Types of Echinoderms - K12 LibreTexts
WEBJan 11, 2021 · Eleutherozoa are the echinoderms that can move. This group includes the starfish and most other echinoderms. Pelmatozoa are the immobile echinoderms. This group includes crinoids, such as the feather stars. Listed below are the four main classes of echinoderms present in the Eleutherozoa Group (Table below).
The brittle star genome illuminates the genetic basis of animal ...
WEBJul 19, 2024 · We showed that the ‘Eleutherozoa Linkage Groups’ descend from a single fusion of ancestral bilaterian linkages (B2 + C2). Chromosome-scale crinoid and hemichordate genomes will reveal whether ...
Variety of Life: Eleutherozoa - Field of Science
WEBThe clade Eleutherozoa includes the free-living echinoderms, which have lost the stem of more basal lineages, as well as inverting the central body axis so that the mouth is generally ventral rather than dorsal. In the Asterozoa, sea stars and brittle stars, the post-larval body is comprised of a central disc with radiating appendages (arms).
Project I: Origin and basal relationships among echinoderms
WEBFrom a deep time perspective, modern echinoderms include only two groups: Eleutherozoa, including sea stars, brittle stars, sea cucumbers and sea urchins; and Crinoidea, including sea lilies and feather stars.
Eleutherozoa - Oxford Reference
WEBOverview. Eleutherozoa. Quick Reference. (phylum Echinodermata) Ranked previously as a subphylum, a term that is now used only informally, to denote free-living echinoderms. These include the subphyla Asterozoa and Echinozoa. From: Eleutherozoa in A Dictionary of Zoology » Subjects: Science and technology — Life Sciences.
9.4: Major Fossil-Forming Groups (Invertebrates)
WEBMay 10, 2024 · Echinoderms are divided into two Subphyla: Eleutherozoa (non-stemmed) and Pelmatozoa (stemmed). Many of the calcite plates that make up the mesoderm skeleton are not fussed together so the fossil record of this group includes lots of disaggregated echinoderm plates in additional to complete body fossils.
Eleutherozoa Definition & Meaning - Merriam-Webster
WEBThe meaning of ELEUTHEROZOA is a subphylum or other division of Echinodermata including the Asteroidea, Ophiuroidea, Echinoidea, and Holothurioidea.
Eleutherozoa | Encyclopedia.com
WEBEleutherozoa (phylum Echinodermata) Ranked previously as a subphylum, a term that is now used only informally, to denote free-living echinoderms. These include the subphyla Asterozoa and Echinozoa.
The origin of the class Holothuroidea (Eleutherozoa: Echinozoa)
WEBSep 19, 2019 · In all extant classe s of Eleutherozoa, exc ept holothurians, the ve primary lobes of the hyd rocoel initially dev elop as tentacles and s ubsequently trans- form into radial a mbulacral canals.