Friday mystery object #279 answer

Last week I gave you this mystery object to identify:


It’s the kind of thing you find in museum collections quite often, but it will commonly be misidentified – especially in anthropology collections where (in my experience) it will commonly be referred to as a claw or big cat tooth.

However, nobody who commented went down that route, recognising that the hollow base and well defined crown indicates that it’s an open rooted tooth of some sort. In mammals an open root at this size that would suggest a pig tusk or perhaps a whale tooth, but this isn’t mammalian.

In fact, this tooth is from something even less cuddly than a whale, something crocodilian. This was recognised first by Carlos Grau, but others who came to the same conclusion included Jonathan Larwood, Daniel Jones, palfreyman1414, Wouter van Gestel and Charne. More specifically, this tooth is from a Gharial, Gavialis gangeticus (Gmelin, 1789). This Gharial from the Grant Museum of Zoology in fact:


Grant Museum of Zoology Specimen LDUCZ-Y215

Gharial teeth are a bit less conical than the teeth of most crocodiles and alligators. Presumably the curve helps prevent their main diet of fish from getting free when caught.

Gharials are sexually dimorphic, with the adult males bearing a big rounded bony  knob on the end of their rostrum, this is where the name Gharial comes from, as this feature resembles a local earthenware pot called a “ghara”. Sadly, these distinctive crocodilians are critically endangered, with just a few hundred left alive in the wild. They are affected by habitat loss, egg theft and use in traditional medicines.

More mysteries next week and if you fancy hearing me talking about animals you might be interested in coming to Animal Showoff at the Grant Museum of Zoology next Thursday evening!

Friday mystery object #204 answer

Last Friday I gave you this unusual tooth to identify:


It had me a bit stumped, as I couldn’t think of many things big enough for a tooth this size and I could think of even fewer with a tooth this shape.

My first thought was one of the smaller toothed whales, since this would be in the right size range and the open root is similar to what you see in a Sperm Whale:

Tooth of a Sperm Whale in a Hand by Lord Mountbatten

But the low and wide shape was all wrong for most of the whale teeth I can think of, except perhaps for the rather odd tusks found in the mandibles of some species of beaked whale.

In fact, I was thinking that it might be the tusk of a juvenile or female Gray’s Beaked Whale, given the shape of the male’s tusks.

However, Laura McCoy made a very useful observation (initially via ermineofthenorth) about the upper incisors (or premaxillary incisors) of the  Continue reading

Friday mystery object #204

This Friday I have something for you to identify that has been puzzling me for a while. It looks very distinctive, but I can’t narrow down what it is, so I’d really appreciate your thoughts.

Can you work out what this is?

click for bigger image

As usual you can put your suggestions and thoughts below and I’ll do my best to reply. Feel free to ask questions, but at the moment I can only provide answers based on the physical object because I have no idea where it came from or when we got it. It’s a real puzzle!

Friday mystery object #32 answer

On Friday Dr David Waterhouse presented a guest mystery object from a beach on the Norfolk coast near Cromer:

There were some interesting ideas about what it might be, ranging from oil-spill residue (Gimpy) to shark egg-case (SmallCasserole), but Henry Gee managed to correctly identify the specimen as being a Continue reading