安裝中文字典英文字典辭典工具!
安裝中文字典英文字典辭典工具!
|
- Echinoderm - Wikipedia
An echinoderm ( ɪˈkaɪnəˌdɜːrm, ˈɛkə - ) [2] is any 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" [3]
- Definition, Characteristics, Species, Facts - Britannica
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, starfishes, basket stars, and sea daisies
- Echinoderms - Definition, Examples, Characteristics, and Habitat
Currently, the phylum Echinodermata contains three extant subphylums and five extant classes, including almost 7,000 living species It is the largest marine phylum and the second-largest group of deuterostomes after the chordates
- Phylum Echinodermata- Characteristics, classification, examples
They are exclusively marine and are among the most common and widely distributed marine animals They occur in all seas from the intertidal zones to great depths They have an organ grade system of body organization Symmetry usually radial, nearly always pentamerous
- Phylum Echinodermata | manoa. hawaii. edu ExploringOurFluidEarth
Echinoderms are named for the spines or bumps covering the outer surface of the bodies of many of them (Greek root word echino - meaning spiny; Latin root word - derm meaning skin) Examples of echinoderms include sea stars, sea urchins, sea cucumbers, brittle stars, and feather stars (Fig 3 83)
- Echinodermata - Digital Atlas of Ancient Life
The phylum Echinodermata represents the largest animal phylum of exclusively marine animals and include animals as morphologically diverse as sea stars (Asteroidea), brittle stars (Ophiuroidea), sea cucumbers (Holothuroidea), sea urchins and sand dollars (Echinoidea), and sea lilies (Crinoidea)
- Echinoderm - Evolution, Adaptations, Paleontology | Britannica
Echinoderm - Evolution, Adaptations, Paleontology: Phylum Echinodermata was already well diversified by the Lower Cambrian Period; the extensive fossil record has many gaps There is much disagreement about the classification of echinoderms
- Echinodermata (sea stars, sea urchins, sea cucumbers, and relatives . . .
Echinodermata has approximately 7000 described living species and about 13,000 extinct species known from the fossil record This phylum is the largest without any freshwater or terrestrial forms Mainly a marine group, echinoderms are found in all the oceans
|
|
|