ZOO 2700 Lecture Notes - Lecture 2: Echinoderm, Anatomical Terms Of Motion, Starfish
14 Jun 2018
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https://youtu.be/K2G7L5hcEt8 1
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Reich A, Dunn C, Akasaka K, Wessel G (2015) Phylogenomic Analyses of Echinodermata Support the Sister
Groups of Asterozoa and Echinozoa. PLoS ONE 10(3): e0119627. doi:10.1371/journal.pone.0119627
2
crinoids
Sea stars
ophirinoids
Urchins
sea cucumbers
Dipleurula like larva
to understand the other larval development look at out group Crinoidea
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Crinoid larvae
100 µm
Dorsal view, early doliolaria,
Florometra serratissima
by T.C. Lacalli http://scaa.usask.ca/gallery/lacalli/
Adult (~25 cm)
© Rosario Beach Marine Laboratory, Dave Cowles
from http://eol.org/data_objects/10455386
Stalk-less crinoids
- shallow water (tropical)
the larva =
resembling
doliolaria
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Document Summary
1 to understand the other larval development look at out group crinoidea crinoids. Reich a, dunn c, akasaka k, wessel g (2015) phylogenomic analyses of echinodermata support the sister. Crinoid larvae i s d o n i r c s s e l k l a t. Rosario beach marine laboratory, dave cowles from http://eol. org/data_objects/10455386. Crinoid larvae: stalked crinoid with non-feeding auricularia larva i s d o n i r c d e k l a t. > this dipleurula like larva is ancestral (this is what this development is showing) ~1,500 spp. use term sea star not star sh! > an adaptation to absorb nutrients over a longer period of time. embedded in the gonad. 6 free living larval forms which then settle down and turn into sea stars. Asteroidea: water-vascular system the nervous system is largely following the water vascular system.
