The mancallines were a lineage of flightless semi-aquatic birds closely related to auks. Known from the Pacific coasts of what are now California and Mexico, between about 7.5 and 0.5 million years ago, they convergently evolved a close resemblance and similar lifestyle to both the recently-extinct North Atlantic great auk and the southern penguins.
Miomancalla howardi here lived in offshore waters around southern California during the late Miocene (~7-5 million years ago). The largest of the mancallines, it just slightly beat out the great auk in size – standing around 90cm tall (~3') and weighing an estimated 5kg (11lbs).
Like great auks and penguins it would have been a specialized wing-propelled diver, swimming using "underwater flight" to feed on small bait fish. It probably spent much of its life out at sea, probably only returning to land to molt and breed.
Although the only nautiloids living today have characteristic tightly coiled shells, earlier in their evolutionary history these cephalopods were much more diverse.
And Glossoceras gracile here is an example of one of the more unusual groups of nautloids: the ascocerids.
Living during the Late Silurian, about 422 million years ago, in wheat is now Gotland, Sweden, Glossoceras was only around 5cm long as an adult (~2"). Like other ascocerids it started out its life looking like a fairly standard early nautiloid, with a long straight shell that curved slightly upwards, but as it approached maturity things got weird – the front part of the shell grew out into a much more bulbous flask-like shape, and the old juvenile section broke off entirely.
The gas-filled buoyancy chambers of its adult shell were positioned directly above its body chamber rather than behind like in other nautiloids, giving it very good stability in the water. The shell walls were also very thin and lightweight, which would have made it a much more maneuverable swimmer.
Phosphatherium escuillei was one of the very earliest known members of the proboscideans, a lineage today represented only by the three living species of elephants.
Living in what is now Morocco during the late Paleocene and early Eocene, around 56 million years ago, it would have been about the size of a cat, roughly 30cm at the shoulder (~1') and 60cm long (~2'). It had a fairly low flat head with a proportionally short snout, while the back end of its skull behind its eyes was elongated, supporting large powerful jaw muscles.
Wear patterns on its teeth suggest it ate a lot of tough vegetation, and it may have been a semiaquatic animal behaving somewhat like modern tapirs or pygmy hippos – spending a lot of the daytime lounging in water, and emerging onto land to forage during the night.
Fantastic reconstruction of an Archaeopteryx I saw at Southampton Fossil and mineral show. It was part of an exhibition of fossil replicas exhibited by Southampton University.
Comisión para buttsnifer45 usuario de DA, Erza Scarlet del anime Fairy Tail aplica un facesitting a Mirajane Strauss aderezado con una serie de flatulencias en el rostro de la maga clase S las cuales le provocan un gran esfuerzo a Scarlet.
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Commission for DA user buttsnifer45, Erza Scarlet of the anime Fairy Tail applies a facesitting to Mirajane Strauss spiced up with a series of flatulences in the face of the class S magician which cause a great effort to Scarlet.