[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]

Albian-Cenomanian English nodosaurs

This is directed to all members of the list, but has special significance to
those who recieved the continental dino lists from George, as it changes
some of the information given in the European dinosaur section.  I just
recived the Cretaceous Fossil Vertebrates volume from last year that
contains an article on English nodosaurs.
George says, regarding the remains of Anoplosaurus curtonensis: Some,
however, is definitely nodosaurid and probably referable to a genus such as
Acanthopholis, Eucercosaurus, or Syngonosaurus, while other parts are
probably iguanodontid. The genus Anoplosaurus is tentatively retained here
for the iguanodontid material.
Actually, Suberbiola and Barrett find that Anoplosaurus is a diagnostic
nodosaur taxon most clsely related to Silvisaurus and Texasetes.
The other ankylosaurs from the locality are indeterminate.
Acanthopholis horridus is based on remains that may or may not pertain to a
single individual/species.  There is a lot of referred material that does
not obviously belong to this taxon.  It is certainly nodosaur, unlike the
taxa discussed below, which though probably nodosaur, show no synapomorphies
of that group.
Anoplosaurus major is based on a ankylosaur cervical vertebra and three
ornithopod caudal centra.  It was originally part of Acanthopholis
Acanthopholis/Syngonosaurus macrocercus contains both ankylosaur scutes and
ornithopod vertebrae, as well as material that can only be termed Dinosauria
indet. and some that is lost.
Acanthopholis platypus is based on a sauropod metatarsus and ankylosaur
caudal centra and a phalanx.
Acanthopholis stereocercus includes ornithopod dorsal vertebrae and
ankylosaur caudal vertebrae and dermal spine.
Eucercosaurus tanyspondylus is completely ornithopod.

In addition, a couple nomina nuda are mentioned that aren't on George's
Acanthopholis "hughesii"
(SMC B55463-55490) six dorsals, seven caudals, transverse process, four
metapodials, three phalanges, seven dermal plates
All are ankylosaur except some of the metapodials (Dinosauria indet.) and
some dorsal vertebrae (Ornithopoda indet.).

Acanthopholis "keepingi"
(SMC B55491-55526) five dorsals, six caudals, three transverse processes,
rib, two chevrons, metatarsal, two phalanges, fragmentary ilium(?), thirteen
dermal plates, two undetermined bones
All are ankylosaur except some dorsal and caudal vertebrae (Ornithopoda
indet.), a limb fragment (turtle) and the chevrons, rib, metatarsal and
phalanges (Dinosauria indet.).

Gotta go.

Mickey Mortimer