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Re: Dromaeosaur dorsal attacks led to ceratopsian shields and other dino gear? (free pdf)

Does anyone remember a paper suggesting that Archaeopteryx wings were used to 
help the birds steer when they rode around on large sauropods?  It was 
published in the Journal of Irreproducible Results, and a chief difference 
between that one and the new paper is that the Archie one was supposed to be 

Seriously, though, how could you possibly test this?

Ronald Orenstein
1825 Shady Creek Court
Mississauga, ON L5L 3W2

From: Ben Creisler <bcreisler@gmail.com>
To: dinosaur@usc.edu 
Sent: Monday, June 9, 2014 12:47:36 PM
Subject: Dromaeosaur dorsal attacks led to ceratopsian shields and other dino 
gear? (free pdf)

From: Ben Creisler

A new paper:

Garnet Fraser (2014)
“Bizarre Structures” Point to Dromaeosaurs as Parasites and a New
Theory for the Origin of Avian Flight.
The Journal of Paleontological Sciences: JPS.C.2014.01


Ceratopsian neck frills, lambeosaurine crests, hadrosaur scales,
stegosaur plates, cranial dome horns of Pachycephalosaurus
(=Stygimoloch), diplodocid “whip” tails, sauropod dermal spikes,
elaborate osteoderms, and elongated neural spines are considered
bizarre dinosaur structures. Species identification, thermoregulation,
sexual selection and display functions are theorized to explain these
structures, not mechanically suitable for defense against large
theropods. I propose that bizarre structures may have served to defend
against parasitic dorsal attacks from riding dromaeosaurs. Removal of
soft tissues by dromaeosaurs may have caused desiccation necrosis,
callus formation and osteomyelitis, consistent with deformities in
fossilized bone. Frequent dismounts from large living dinosaurs may
explain the origin of feathers, gliding and avian flight. Plausibility
of dorsal dromaeosaur riding is theorized from extant models
including: the accipitrids (eagles), Geospiza difficilis
utter shark), and vampire bat. Geologist Davidson-Arnott
questions the “lethal sandslide” burial of the Mongolian “fighting
pair,” a Velociraptor and Protoceratops, found locked in battle.
Re-evaluation of their deposition favors a solitary approach to
feeding in dromaeosaurs.