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Description

When animal life was first introduced to Notus (temporary name) it very quickly diversified into a huge diversity of forms. One early result of this was a derived annelid called the ichtyovermis ("Fish Worm"), which used its array of simple limbs like a pair of large fins. Although it is similar to the Cambrian chordates, as annelids already are, it has a few notable differences. For example, the gills on early chordates (such as lampreys) are a series of pits, but the ones on ichtyovermis are more like a pair of scoops with holes in the back. Also, since their fins are found along the sides, not the top and bottom, they swim a lot like a dolphin. While these sound superficial, they will have a huge effect on their future evolution, as the marine mammals they resemble have a much different fin layout. However, the details on that will have to wait until we have fully explored the early Protogene sea.

Description

When animal life was first introduced to Notus (temporary name) it very quickly diversified into a huge diversity of forms. One early result of this was a derived annelid called the ichtyovermis ("Fish Worm"), which used its array of simple limbs like a pair of large fins. Although it is similar to the Cambrian chordates, as annelids already are, it has a few notable differences. For example, the gills on early chordates (such as lampreys) are a series of pits, but the ones on ichtyovermis are more like a pair of scoops with holes in the back. Also, since their fins are found along the sides, not the top and bottom, they swim a lot like a dolphin. While these sound superficial, they will have a huge effect on their future evolution, as the marine mammals they resemble have a much different fin layout. However, the details on that will have to wait until we have fully explored the early Protogene sea.