Mississippian Sharks Of The
Prospect Hill Formation
You can order any of the fossils listed below by clicking here
The Prospect Hill Formation is of Lower Mississippian age and outcrops near Kalona, Iowa. The deposit
contains a diverse assemblage of conodonts and vertebrates, all of which appear almost exclusively as
microfossils. The vast majority of Palaeozoic shark teeth are actually microscopic in size and unlike their
mesozoic cousins rarely attain large sizes. There are many genera of sharks known from the Palaeozoic
but as most can only be collected by dissolving shales and limestone in acid they are rarely seen for sale.
Offered below is a rare sample of middle Palaeozoic sharks representing close to a dozen different
genera. The Prospect Hill sharks have never been intensively studied and as the species may be
undescribed we have only listed specimens by their genus. All of the specimens listed measure between
~1 and 3 mm unless noted. A photographic ID card showing an enlarged image of each genera will
accompany every order. All specimens are housed in micropalaeontology slides with slip case and cover.
Deltodus sp.
Shark Tooth
Prospect Hill Fm.
Mississippian, Iowa
5 mm       £15/$25
Helodus sp.
Shark Tooth #3
Prospect Hill Fm.
Mississippian, Iowa
5 mm         £8/$15
Deltodus sp.
Shark Tooth #2
Prospect Hill Fm.
Mississippian, Iowa
5mm       £15/$25
Deltodus sp.
Shark Tooth #6
Prospect Hill Fm.
Mississippian, Iowa
5 mm        £15/$25
Helodus sp.
Shark Tooth
Prospect Hill Fm.
Mississippian, Iowa
5 mm      £8/$15
All specimens show better details than the images suggest (we apologise for not being able to provide
better pictures of the specimens) and are typical of the specimens you will receive.
To read and download a superbly written and illustrated highly technical article on a chondrichthyan fauna
that is very similar to the Prospect Hill Formation please follow this link
Lower Mississippian Sharks Of China.
Helodus sp.
Strongly domed tooth with
distinct tubular dentine
£6/$10
Hamiltonichthys sp.
Excellent and rare complete
crown of a crushing tooth
£15/$25
Cooleyella sp.
Excellent complete teeth from a
rare genus known only from
micro teeth - £15/$25
Thrinacodus sp.
Strongly recurved multicusped  
teeth. Known only from micro
teeth. Near complete - £6/$10
Desmiodus sp.
Multiple subtle cusps on a
pyramidal crown. Rare
£15/$25
Deihim sp.
Protacrodus type tooth with labial
accessory cusps. Near complete
to complete - £12/$20
Protacrodus sp.
Similar to Deihim but lacking
the labial accessory cusps.
Near complete to complete
£10/$15
Stethacanthus sp.
Partial to near complete teeth
£5/$8
Cristatodens sp.
Similar to Desmiodus but more
elongate and lacking the strong
central buttress. Near complete to
complete - £15/$25