I have collected few specimens of a small black colored shrimp which associated with sea urchins. I guess it is a Arete spp. So I need a identification key to identify it to species level. So, I am looking forward your help. Thank you.
Glad to know that you are working on the sea urchin symbiont, in particular Arete spp. A website called www.decapoda.nhm.org will help you better in retreiving all the literature related to your desired species. You can download the PDF by giving key words and it is absolutely free.