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| Hoploscaphites nicolletti
Taxonomy: Phylum Mollusca, Class Cephalopoda, Subclass Ammonoidea,
Order Ammonitida
Geological Time: Upper Cretaceous
Size: Spaphites are 55, 40 (partial), and 25 (partial) mm across;
concretion base 100 x 70 x 80 mm
Fossil Site: Fox Hills Formation, North Central, South Dakota
Item: AA017
Price: $125.00
Remarks: Two complete and one partial ammonite in a portion
of a concretion from the famour Fox Hills Formation. Note the
beautiful
opalized
shells,
a gemlike mineral called ammonlite. |
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| Discoscaphite conradi
Taxonomy: Phylum Mollusca, Class Cephalopoda, Subclass Ammonoidea,
Order Ammonitida
Geological Time: Upper Cretaceous
Size: Ammonite is 70 mm across; concretion is about 110 by 90
by 50 mm
Fossil Site: Fox Hills Formation, North Central, South Dakota
Item: AA016
Price: SOLD
Remarks: Much of the opalized shell is preserved. The concretion
is loaded with bivalves. Discoscaphite conradi is a rarer scaphite. |
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| Hoploscaphites nicolletti
Taxonomy: Phylum Mollusca, Class Cephalopoda, Subclass Ammonoidea,
Order Ammonitida
Geological Time: Upper Cretaceous
Size: Ammonites are 50, 50, 20 mm across; concretion is about
120 by 120 by 70 mm
Fossil Site: Fox Hills Formation, North Central, South Dakota
Item: AA036
Price: $150.00
Remarks: Three beautiful scaphites in large concretion portion.
Shells are intact. |
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Sphenodiscus lenticulares and Hoploscaphite
cheyennensis
Taxonomy: Phylum Mollusca, Class Cephalopoda, Subclass Ammonoidea,
Order Ammonitida
Geological Time: Upper Cretaceous
Size: Hoploscaphite 55 mm and Sphenodiscus 30 mm across; concretion
is about 120 by 110 by 65 mm
Fossil Site: Fox Hills Formation, North Central, South Dakota
Item: AA021
Price: $295.00
Remarks: A two-species association. The larger Hoploscaphite
cheyennensis has shell preserved intact. The Sphenodiscus has
some fire opal
shell, with much of the septa pattern elsewhere revealed. |
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| Hoploscaphite nicolletti
Taxonomy: Phylum Mollusca, Class Cephalopoda, Subclass Ammonoidea,
Order Ammonitida
Geological Time: Upper Cretaceous
Size: Ammonite is 60 mm across; concretion is about 110 by 80
by 60 mm
Fossil Site: Fox Hills Formation, North Central, South Dakota
Item: AA033
Price: $110.
Remarks: A beautiful Hoploscaphite nicolletti with shell preserved,
and a patch of green fire opal.
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