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Size of *Neoceratodus africanus* and/or *N. tuberculatus*



Found it. Enjoy.

Also, there's evidence from jaw mechanics, too, that spinosaurs were "herons from hell".

----- Original Message -----
From: "David Marjanovic" <david.marjanovic@gmx.at>
To: <DinosaurMailingList-KilledThreads@yahoogroups.com>
Sent: Wednesday, November 19, 2008 11:00 PM
Subject: [DinosaurMailingList-KilledThreads] THE BIG ONE

Oh yeah, I almost forgot.

C. S. Churcher: Giant Cretaceous lungfish *Neoceratodus tuberculatus* from a
deltaic environment in the Quseir (=Baris) Formation of Kharga Oasis,
Western Desert of Egypt, Journal of Vertebrate Paleontology 15(4), 845 --
849 (27 December 1995)


This paper is a "Note", so it doesn't have an abstract, and I have to give
you quotes from the text itself.

"Lungfish are often a rare or uncommon component of most assemblages from
deposits younger than Triassic age, and it is unusual for parts other than
toothplates to be preserved. Assemblages from the Cretaceous of northern
Africa often contain numerous arganodontid and neoceratodontid lungfishes,
including some of the largest dipnoans known. This report describes a
significant new specimen from the early Late Cretaceous of northeastern
Africa."

"This adult mandibular specimen is the first well preserved prearticular
bone with an attached tooth plate definitely referable to *N. tuberculatus*
[...]. The occlusal surface of the tooth plate is estimated to have been
some 100 mm long by 36 mm wide, which makes the plate one of the larger
plates known."


"*Neoceratodus tuberculatus* is one of the largest lungfishes known, with
tooth plates that exceed in size those of the Carboniferous giant *Ctenodus
cristatus* and of the largest Triassic ceratodont *Ceratodus latissimus* [ =
"the broadest one"] (Agassiz, 1843; Miall, 1878). If the body length of
fossil species correlates with tooth plate length as it does in the Recent
Australian lungfish, the larger tooth plates of *N. tuberculatus* indicate
adult body lengths of several meters. *N. tuberculatus* is certainly several
times larger than members of the fossil Australian genera *Mioceratodus*
[...] and *Metaceratodus* [...]."


*N. africanus* is said to be "smaller". I have to check if it's now
considered synonymous with *N. tuberculatus* -- I don't remember what I
found on the Internet on Sunday...

Possible *Spinosaurus* teeth have been found in the same layers.