Rhomaleosaurus is the largest known Lower Jurassic pliosaur and was the top predator in early Jurassic marine ecosystems. It has a reinforced skull to help resist torsion and a ferocious set of teeth, a combination of characters perfect for snatching and killing cephalopods, fish, and other marine reptiles.
In 2012 I co-presented a poster at the SVP annual meeting on a new plesiosaur from Lyme Regis, UK (see my article about it here). The long awaited follow up paper was finally published this summer in the latest volume of Palaeontographica A (Smith and Araújo 2017) and the beast now has a name, Thaumatodracon wiedenrothi, meaning ‘Wiedenroth’s Wonder Dragon’.
Many readers will be familiar with the giant plesiosaur on display in the marine reptiles gallery of the Natural History Museum, London. This is a cast of the 7 metre long holotype of Rhomaleosaurus cramptoni, the original of which is housed in the National Museum of Ireland (Natural History) and formed the basis for my PhD thesis back in (time flies!) 2007.
Earlier this month I co-authored a poster at SVP 2012 describing a new pliosaur from the Sinemurian of Lyme Regis (Smith and Araújo 2012). I was unable to attend the conference in person so my collaborator and friend Ricardo Araujo was on hand to present our preliminary findings.
This article might be considered a bit of a cheat, as it’s mostly lifted from a section of my recent paper describing the new genus Meyerasaurus, formerly ‘Thaumatosaurus’/Rhomaleosaurus victor (Smith and Vincent 2010). However, I think the topic is interesting and might be appreciated by a wider audience.
So far, 2008 has seen a healthy number of new papers on plesiosaurs and a few new taxa too. Way back in February, Druckenmiller and Russell (2008a) introduced Nichollsia borealis, a plesiosaur of uncertain affinity, based on a beautifully preserved specimen from Alberta, Canada.
