Bold ranks show taxa that will be shown in taxoboxes
because rank is principal or always_display=yes.

Ancestral taxa
Domain: Eukaryota /displayed  [Taxonomy; edit]
Clade: Amorphea  [Taxonomy; edit]
Clade: Obazoa  [Taxonomy; edit]
(unranked): Opisthokonta  [Taxonomy; edit]
(unranked): Holozoa  [Taxonomy; edit]
(unranked): Filozoa  [Taxonomy; edit]
Clade: Choanozoa  [Taxonomy; edit]
Kingdom: Animalia  [Taxonomy; edit]
Phylum: Porifera  [Taxonomy; edit]
Class: Calcarea  [Taxonomy; edit]


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Parent: Porifera [Taxonomy; edit]
Rank: classis (displays as Class)
Link: Calcareous sponge|Calcarea(links to Calcareous sponge)
Extinct: no
Always displayed: yes (major rank)
Taxonomic references:
Parent's taxonomic references: Sponge Paraphyly is now "generally accepted" (according to, for example, the article at Porifera). For a recent reference summarizing this perspective, see Nielsen, Claus (2010). Animal Evolution: Interrelationships of the Living Phyla (third ed.). ISBN 9780199606023.. This should be denoted in the link by double quotation marks ("").