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Keyphrases
Echinodermata
100%
Asteroids
89%
Asteroidea
55%
Ossicles
22%
Ordovician
20%
Crown Group
17%
Ophiuroids
15%
Phylogeny
13%
Echinoderm
11%
Sea Star
10%
Late Cretaceous
10%
Asterozoa
10%
Asterozoans
9%
Late Ordovician
8%
Antarctica
8%
Early Ordovician
8%
Crinoids
7%
Asteriidae
7%
Morocco
7%
Class Level
7%
Texas
7%
Valvatida
6%
Skeletal Elements
6%
Seymour Island
6%
Antarctic Peninsula
6%
Shallow Water
6%
Fossil Record
6%
Ophiuroidea
5%
Upper Ordovician
5%
Goniasteridae
5%
Homeomorphy
5%
North America
5%
Phylogenetic Position
5%
Earth and Planetary Sciences
Asteroid
65%
New Species
40%
New Genus
36%
Ordovician
28%
Morphology
20%
Eocene
16%
Cladistics
16%
Antarctic Region
11%
Early Ordovician
11%
Late Cretaceous
10%
Fossil Record
10%
Peninsula
9%
Shallow Water
8%
Morocco
8%
Ancestry
8%
Silurian
7%
Texas
7%
Upper Cretaceous
7%
United States of America
7%
Late Ordovician
7%
Benthos
7%
Predation
6%
New Taxon
6%
Deep Water
5%
France
5%
Maastrichtian
5%
Europe
5%
Agricultural and Biological Sciences
Echinodermata
62%
Asteroidea
37%
Cladistics
20%
Somasteroidea
12%
New Genus
12%
New Species
11%
Crown Group
10%
Valvatida
9%
Ophiuroidea
8%
Skeleton
7%
Asteriidae
6%
Lineages
6%
Paxillosida
5%