Name:
Nicrosaurus
(Neckar lizard - after the Neckar river).
Phonetic: Nek-roe-sore-us.
Named By: Fraas - 1866.
Synonyms: Belodon kappfi.
Classification: Chordata, Reptilia,
Archosauria, Phytosauria, Phytosauridae.
Species: B. kappfi (type),
B.
meyeri.
Diet: Carnivore.
Size: Skull about 75cm long. Total body length
possibly up to about 4 meters.
Known locations: Germany. USA, New Mexico.
Time period: Norian to Rhaetian of the Triassic.
Fossil representation: Several specimens.
Nicrosaurus
is another one of the phytosaurs, reptiles that have a striking
similarity to modern crocodiles, although the position of the
nostrils higher up the snout and in front of the eyes is a dead
giveaway that Nicrosaurus is a phytosaur
(crocodiles have their
nostrils on the tips of their snouts). Nicrosaurus
is today
considered to be closely related to the phytosaur Mystriosuchus,
and
at one time these two phytosaurs were once thought to represent male
and female versions of phytosaurs in general. This idea came about
upon the basis that the larger snouts of phytosaurs like Nicrosaurus
were display devices only upon 'males’ and were for ‘females’
that had slender gracile snouts like those seen in Mystriosuchus.
A
little bit of detective work by palaeontologists has since completely
discredited this theory however as the ‘female’ and ‘male’
forms are not only found separate, but are each found in strata that
are from different geological periods. These are the hallmarks of
different genera and species, not sexes.
An
interesting discovery
regarding a collection of Plateosaurus has found
that some of these
dinosaurs were possibly trapped in quicksand and then scavenged by
wandering predators. Some of the teeth associated with this discovery
were found to be those of Nicrosaurus which shows
that scavenging was a
part of this phytosaurs behaviour. It also brings into light the
possibility of Nicrosaurus hunting and killing
smaller dinosaurs that
would have steadily been becoming much more common towards the end of
the Triassic.
Further reading
- Heterodonty in the European phytosaur Nicrosaurus kapffi
and its
implications for the taxonomic utility and functional morphology of
phytosaur dentitions. - Journal of Vertebrate Paleontology - A.
Hungerb�hler - 2000.
- Two new phytosaur species (Archosauria, Crurotarsi) from the Upper
Triassic of southwest Germany. - Neues Jahrbuch f�r Geologie und
Pal�ontologie, Monatshefte 2000(8). - A. Hungerb�hler & A. P.
Hunt - 2000.
- The phytosaur Nicrosaurus buceros in the upper
triassic of the Chama
basin, north-central New Mexico. - Geological Society of America
Abstracts with Programs. - K. E Zaigler, S. Lucas, A. ,Heckert
& A. Hunt - 2001.
- Possible secondarily terrestrial lifestyle in the European phytosaur
Nicrosaurus kapfii (Late Triassic, Norian): a
preliminary study. -
Bulletin of the New Mexico Museum of Natural History and Science 61 -
J. Kimmig - 2013.