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181:. They are Calcarea with the triactines and the basal system of tetractines sagittal (i.e. the rays of the spicule make unequal angles with each other), exceptionally regular. In ontogeny the first spicules to be secreted are diactines. Choanocytes are apinucleate. Calcaronea have amphiblastula larvae
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16:Subclass of sea sponges
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354:Paleobiology Database
460:Sponge subclasses
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264:Wikispecies
175:sea sponges
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455:Calcaronea
449:Categories
297:Calcaronea
284:Calcaronea
270:Calcaronea
240:Calcaronea
210:Calcaronea
195:Calcaronea
167:Calcaronea
114:Calcaronea
110:Subclass:
49:Grantiidae
142:Lithonida
137:Sycettida
80:Kingdom:
74:Eukaryota
47:, family
255:Q1985953
249:Wikidata
179:Calcarea
171:subclass
104:Calcarea
94:Porifera
90:Phylum:
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120:Orders
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219:(NCBI)
404:is a
367:WoRMS
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169:is a
406:stub
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318:ITIS
305:EoL
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Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
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