Phylogeny and Diversification in Mollusc
The first molluscs probably arose during Precambrian times because fossils attributed to Mollusca have been found in geological strata as […]
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phylogeny
Phylum Porifera: Phylogeny and Adaptive Diversification
Sponges originated before the Cambrian period. Two groups of calcareous spongelike organisms occupied early Paleozoic reefs. The Devonian period saw
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