Echinoids
- Created by: rosie.may7
- Created on: 02-05-16 14:14
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- Echinoids
- Echinodermata, Echinoidea
- Regular
- Mode of life
- Benthonic, epifaunal, Vagrant, High energy conditions
- Graze on algae living on the rocky substrate and scavenging food particles
- Five fold radial symmetry
- No Facioles
- Mode of life
- Irregular
- Morphology
- Aboral View
- Interambulacral area
- Interambulacral plate
- Lacking Tubercles
- Interambulacral plate
- Anterior Groove
- Helps to direct food towards the organisms mouth. Lined with cilia to direct currents.
- Petaloid ambulacra
- Ambulacral plate
- Each has a pore pair
- Ambulacral plate
- Interambulacral area
- Oral View
- Labrum
- Lip protruding over the mouth. Prevents sediment moving into the mouth
- Fascioles
- a band of minute tubercles bearing modified commonly ciliated spines which direct water to the mouth, and waste away from the organism
- Plastron
- Area covered with tubercles
- Tubercles
- For spine attachment, allows organism to dig burrows
- Labrum
- Aboral View
- Mode of life
- Benthonic, infaunal, vagrant. Low energy conditions
- Particle feeds, extracts microorganisms from sea water
- Bilateral symmetry
- Two Fascioles
- Ambulacra run to the aboral surface, forming petaloid shapes
- Interambulacra fused together over oral surface. also form the plastron
- Tube feet used for respiration, digging, maintaining the burrow and anal tube
- Morphology
- Cambrian to recent
- Extant
- Morphology
- Oral View
- Aristotle's lantern
- marks position of mouth, made up of 5 chisel like teeth
- Aristotle's lantern
- Test
- Ambulacral area
- Ambulacral plate
- Pore Pair
- Tube feet
- soft tissue which extend out through the pore pairs. Used for respiration, attachment and movement
- Tube feet
- Pore Pair
- Ambulacral plate
- Interambulacral area
- Interambulacral plate
- Tubercle
- Boss
- Wide base of the tubercle, for muscle attachment
- Muscle
- Attaches spine to the tubercle. Allows independent rotation of the spine
- Mamelon
- centre of the tubercle. Point of articulation for the spine
- Spine
- Made of calcium carbonate. Used for movement and defence
- Boss
- Tubercle
- Interambulacral plate
- Ambulacral area
- Regular
- Mode of life
- Benthonic, epifaunal, Vagrant, High energy conditions
- Graze on algae living on the rocky substrate and scavenging food particles
- Five fold radial symmetry
- No Facioles
- Mode of life
- Aboral View
- Genital plate
- releases sperm and eggs into the water column
- Genital plate
- Oral View
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