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The holotype skull is about 716 mm (2.3 ft) long from the tip of the beak to the center of the sagittal nuchal crest at the upper back of the head (a size likened to the size of a horse's skull), making it the largest skull of any known bird. The hind end of the skull is 312 mm (12 in) wide.
Kelenken guillermoi, from the Langhian stage of the Miocene epoch, some 15 million years ago, discovered in the Collón Curá Formation in Patagonia in 2006, represents the largest bird skull yet found. The fossil has been described as being a 71-centimetre (28 in), nearly intact skull.
The discovery of Kelenken clarified the anatomy of large phorusrhacids: flightless birds with long hind limbs, small wings, huge skulls and hooked beaks. At 716 mm (28.2 in) long, the skull of Kelenken is the largest known of any bird. Kelenken is thought to have been about 3 m (10 ft) tall and exceeded 100 kg (220 lb) in weight. It differs ...
Protorosaurus skull diagram. There is a nice skull diagram of Protorosaurus in the 2008 redescription (p. 140). It'd be nice to see it adapted and color coded to put in the article. Hemiauchenia 07:21, 2 June 2022 (UTC) I can definitely do this, especially since the redescription and preservation are quite nice.
The discovery of Kelenken clarified the anatomy of large phorusrhacids: flightless birds with long hind limbs, small wings, huge skulls and hooked beaks. At 716 mm (28.2 in) long, the skull of Kelenken is the largest known of any bird. Kelenken is thought to have been about 3 m (10 ft) tall and exceeded 100 kg (220 lb) in weight. It differs ...
Phorusrhacos had a skull nearly 65 centimetres (26 in) long, stood nearly 2.4 meters (7 ft 10 in) tall, and probably weighed nearly 130 kilograms (290 lb), as much as a male ostrich. [ 7 ] [ 8 ] It had very strong legs, capable of running at high speed, stubby, flightless wings, a long neck, and a proportionately large head.
That size diagram is from 2011, while the giant specimen mentioned in the article Eurypterus itself was described in 2021. So I don't know what the source of that size diagram is. But we do have a giant specimen of Eurypterus (E. lacustris by the way, not E. remipes), estimated to be over 1.5 metres in size, so that size diagram could just be ...
The skull diagram is useful on a historical level, I may be able to generate an updated replacement. Fanboyphilosopher ( talk ) 04:11, 3 May 2023 (UTC) Probably, but as usual, these are used all sorts of places and will remain so if they stay inaccurate, and as always, it's unlikely we'll get a new version anytime soon.