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Taxonomy: For all marine species, Project Gastropods uses the taxonomy in the online database WoRMS. When starting a new article, do not use sources of taxonomic information that predate the 2017 revision for all gastropod groups ("Revised Classification, Nomenclator and Typification of Gastropod and Monoplacophoran Families" by Philippe Bouchet & Jean-Pierre Rocroi, Bernhard Hausdorf, Andrzej Kaim, Yasunori Kano, Alexander Nützel, Pavel Parkhaev, Michael Schrödl and Ellen E. Strong in Malacologia, 2017, 61(1–2): 1–526.) (can be dowloaded at Researchgate.net), substituting the previous classification of 2005 Taxonomy of the Gastropoda (Bouchet & Rocroi, 2005). If you need help with any aspect of an article, please leave a note at the Project talk page.
Aren't marine gastropods (or any other animal) aquatic. Shouldn't the sentence read - freshwater and marine - instead. (marine being oceanic or saline)
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.
