#dunedin

By David Steer

A very large, extinct, leatherback turtle from the Eocene, named after beloved author Terry Pratchett. He was pleased about this, saying that anybody that wasn't delighted about getting a species named after them was clearly a Pod being from the Planet Zog.

The first fossils from the genus were discovered by German Paleontologist Christian Erich Hermann von Meyer in 1846, but all he had were the dermal plates (not that different from the fossil above, really). That's probably why even by 1879, they still weren't clear on what it actually was - British paleotologist Harry Govier Seeley thought they resembled the armour of an armadillo.

The Pturtle was discovered in New Zealand in the 1990s. It would have been 2.5m long, in life.

Sadly, there's only one Dermochelyid turtle left in the world - the Leatherback Dermochelys coriacea, which is critically endangered in some areas. Leatherbacks are unique compared to other modern sea turtles because they lack a bony shell; instead, its carapace is covered by oily flesh and flexible, leathery skin. They're also the deepest-diving and fastest reptiles in the world, swimming down to over 1200m depth, at speeds of up to 35kph. Their constant activity and internal adaptations lets them run at a surprisingly high internal temperature - 18C above the surrounding water.

The biggest threat to leatherback survival is, unfortunately, humanity - hatchlings can be confused by artificial light and head inland instead of towards the water, older turtles are easily caught in fishing nets, and they can confuse plastic bags floating in the water for the jellyfish that form the bulk of their diet.

why are you doing this?

where do you get these images from?

what decides which town you document?

why dunedin?

a. - I am from Australia.

b. - I've tried to give some background on this in a few posts, still plenty more to write about though.

c. - Mainly from real estate listings, but also from donations and other sources too.

d. - At the moment I'm going through the world alphabetically.