Poseidon2910 - Birds, Synapsids and Mammals

Here are the birds, Synapsids and mammals of this odd, seeded world. This is the final entry in this series, I am proud of these concepts, despite the failure of the overall project. - A beaver-like descendant of Kayentatherium, that clambers amongst kelp forests, feeding on the ever-present kelp. A giant, manatee-like descendant of Kayentatherium, which propels itself underwater with a laterally undulating tail. A seal-like descendant of Castorocauda. A sea-lion-like descendant of Castorocauda. A large platypus, that probes the sea-bed in search of worms and other small invertebrates. A streamlined, dugong-like descendant of Thalassocnus, which feeds on sea-grass in temperate waters. A giant, long-necked descendant of Thalassocnus, which swims using its broad flipper-like limbs. A pony-sized carnivorous Whippomorph, which scavenges and forages along coastlines, as well as in shallow near shore waters. A seal-shaped, limb-propelled Archaeocete swimmer. A giant, walrus-like descend...