Talk:Caenogastropoda

Intro
Aren't marine gastropods (or any other animal) aquatic. Shouldn't the sentence read - freshwater and marine - instead. (marine being oceanic or saline)

Clades
The concept of a clade is well understood by most biologists and paleontologists, as a continuous branch of the taxonomic tree starting at some determined point. The term itself gives no indication of its capacity in terms of existing or possible side branches, nor does it give any indication of its position relative to larger branches. Any taxon, such as an order, can be thought of as a clade that includes all subtaxa such as families and genera.

The clade Sorbeoconcha can still be ranked as an order and the clade Hypsogastropoda as a suborder unless it's been reranked. Without such specificity it seems the terms are somewhat ambiguous.

John M, on 9 May 2009