according to member randyo, that is incorrect. on 2-15-06, randyo submitted a great pictorial chart, which listed rhyzotrochus under the dendro family.
after researching a little more, it actually appears gem of the sea (balanophyllia) belongs under the flabellidae family.
i wondering if rhyzophyllia is just a made-up name....someone
combined the rhyzo part & phyllia part by mistake.