- Class Crinoidea
The sea lilies and feather stars reside within the class Crinoidea (from the Greek root word crino meaning lily). Sea lilies are sessile organisms attached to the substrate by a flexibl… See more
University of Hawaiʻi at Mānoa
5.6: Phylum Echinodermata - Biology LibreTexts
- Asteroidea. The photo below features a dried sea star. Sea star is a broad ecological term …
- Ophiuroidea. The class Ophiuroidea (brittle stars and basket stars) is related to the …
- Echinoidea. Echinoidea is the class of Echinoderms that includes sea urchins, sand dollars, …
- Holothuroidea. Sea cucumbers are a unique, divergent class from the rest of the …
- Crinoidea. The Class Crinoidea includes the feather stars and sea lilies. The defining …
Echinoderm - Wikipedia
An echinoderm is any deuterostomal animal of the phylum Echinodermata (/ɪˌkaɪnoʊˈdɜːrmətə/), which includes starfish, brittle stars, sea urchins, sand dollars and sea cucumbers, as well as the sessile sea lilies or "stone lilies". While bilaterally symmetrical as larvae, as adults echinoderms are recognisable by their usually five-pointed radial symmetry (pentamerous symmetry), and are found o…
Wikipedia · Text under CC-BY-SA licenseEchinoderm - Radial Symmetry, Tube Feet, Spines
Sep 30, 2024 · Living echinoderms have a conspicuous five-rayed, radial symmetry that masks their fundamental bilateral symmetry. The skeleton is dermal and each skeletal unit consists of a living tissue (stroma) and a …
Echinoderm | Definition, Characteristics, Species,
Sep 30, 2024 · Echinoderm, any of a variety of invertebrate marine animals belonging to the phylum Echinodermata, characterized by a hard, spiny covering or skin. Living species include sea lilies, sea urchins, sea cucumbers, …
Unit 5-8: Phylum Echinodermata – The Biology Classroom
Feb 27, 2020 · 1. Deuterostome development. During embryonic development the blastopore develops into the anus. Largest group of deuterostomes outside of Chordates. 2. Water Vascular System. Unique system of fluid-filled canals and …
Phylum Echinodermata | Biology for Majors II - Lumen …
Echinoderms possess a unique ambulacral or water vascular system, consisting of a central ring canal and radial canals that extend along each arm. Water circulates through these structures and facilitates gaseous exchange as well …
12.2: Phylum Echinodermata - Biology LibreTexts
This phylum is a collection of about 7,000 described living species of exclusively marine, bottom-dwelling organisms. Sea stars (Figure 28.47), sea cucumbers, sea urchins, sand dollars, and …
14.13: Phylum Echinodermata - Biology LibreTexts
Jul 31, 2022 · Echinoderms possess a unique ambulacral or water vascular system, consisting of a central ring canal and radial canals that extend along each arm. Water circulates through …
Echinoidea - Digital Atlas of Ancient Life
May 27, 2020 · Echinoids are the sister taxa to holothuroidians within the Echinozoa clade. Like other extant echinoderms, species in this mobile class primarily exhibit pentaradial symmetry—some have evolved bilateral …