Lecture 8 - Echinodermata

I'd like to give special thanks to Ed Enos at MBL's MRC, who provided two male and two female Arbacia (urchins). We released gametes via electrical stimulation and conducted a fertilization on Monday, Oct. 3. We should have echinoplutei larvae for our lab class.

I'd also like to thank Shawn Arellano for the Echinarachnius (sand dollars) and Ann Tarrant for collecting the Asterias (sea stars) under the WHOI pier.

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Li Ling will be presenting the following paper:

Dumont et al. (2007) Multiple factors explain the covering behaviour in the green sea urchin, Strongylocentrotus droebachiensis

Other readings from primary literature:

I am just amazed at the revolution in invertebrate phylogeny over the past few years - even the phylogeny of echinoderms is in flux. Here is the latest research:

Janies et al. (2011) Echinoderm Phylogeny Including Xyloplax, a Progenetic Asteroid. Syst Biol 60: 420-438, doi: 10.1093/sysbio/syr044.

1904 publication on echinoderms in the Woods Hole region