Sarcopterygian Puke and Ornithopod Gastroliths

Yesterday’s somewhat silly post about Ventastega and ERV reminded me of a couple of interesting pictures that I have recently stumbled across.

The first comes, coincidentally, from an article by Blom, Clack, Ahlberg, and Friedman called Devonian vertebrates from East Greenland: a review of faunal composition and distribution (GEODIVERSITAS • 2007 • 29 (1):119-141). Blom et al describe the situation thus:

A patch of disarticulated spines on specimen MGUH f.n. 155 has been found in association with what seems to be a tetrapod bone, possibly an interclavicle, suggesting that a larger predator, presumably a sarcopterygian such as Eusthenodon, might have regurgitated these remains.

In other words, fish puke…
Here is the picture Fig. 5. — Patch of vertebrate remains containing acanthodian fin spines and scales, and possible interclavicle of a tetrapod (MGUH f.n. 155): A, overview; B, Acanthodidae indet., close up of spine. Scale bars: A, 1 cm; B, 0.5 cm.
The second comes from an article by Ignacio Cerda called Gastroliths in an ornithopod dinosaur (Acta Palaeontologica Polonica 53 (2): 351-355, 2008). You can find out more about gastroliths here. Cerda’s article identifies several fossils as gastrolith and these are the first gastoliths associated with ornithopod dinosaurs.
Here is the picture
Fig. 2. The ornithopod dinosaur Gasparinisaura cincosaltensis Coria and Salgado, 1996, MUCPv 213 from the Late Cretaceous Anacleto Formation of Patagonia. A. Forelimb bones and ribs. B. The longest gastrolith in contact with two right dorsal ribs. C. Cluster of gastroliths associated with the ribs. D. Scanning electron microphotograph of a gastrolith from metamorphic rock.
And don’t get me started on the idea of a fossil baculum!
Isn’t the fossil record wonderful!

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