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What’s This?! Gastropods

Posted by on January 26, 2014
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Most pictures will enlarge with a tap.

Example of a biological classification for a Maclurites crassus

Domain: Eukaryota  – Whittaker & Margulis,1978 – eukaryotes


Anatomy of an Aquatic Snail

Anatomy of an Aquatic Snail


From Wiki: The word “gastropod” is derived from the Ancient Greek words γαστήρ (gastér, stem: gastr-) “stomach”, and πούς (poús, stem: pod-) “foot”, hence stomach-foot. Wikipedia has an excellent article on gastropods HERE.

Link to gastropods in our area – Thanks to Caleb Scheer from

Nice concise list of what has been found here. Lists some of the name changes since 1892.

Paper about gastropods

300+ page downloadable pdf written in 1892. The “Lower Silurian” was part of the Ordovican until the mid 1900’s.

My experience in Fillmore County is that the most common gastropod to be found is the

Maclurites species


mac in matrix


water worn

water worn


mac 6 worn


mac very nice


group 5 macs front


group 5 macs back


Maclurites Manitobense Note closed back.

Maclurites Manitobense
Note closed back.

Maclurites crassus Note open back.

Maclurites crassus
Note open back.

Only about 1 in 50 Maclurites are Maclurites crassus that I find.

Maclurites crassus front

Maclurites crassus


Maclurites crassus back

Maclurites crassus


mac crassus poor front


mac crassus poor back




avatar jewelry


mac pendent turquoise

 I have a very good post with excellent pictures on Maclurites HERE:


Second most common gastropod that I find is the

Hormatoma species


Nice Hormatoma


hormatomas 3 broken


hormatoma 2


Hormatoma 3






A rather unique internal mold of a Hormatoma.

A rather unique internal mold of a Hormatoma.


hormatoma pendant


Probably the third most common is the

Liospira species


Liospira sp. group front

Liospira backs.

Liospira backs.


Liospira on edge.

Liospira on edge.

These remind me of “skipping stones” because of their distinct flatness.

Fusispera species


F with shell


F with shell back


Fusispira inflata


Fusispiera 3


fusispira 2


Fusispera sp. group front

Fusispera "backs"

Fusispera “backs”


fusci pendant



Holopea species


Holopea pyrene

Holopea pyrene


Holopea bottoms

Holopea bottoms


holopea front single


holopea back single


Holopea necklace



Trochonema species


Trochonema sp.

Trochonema sp.





Trochonema sp. 2 front



Subulites species




In Context of the Matrix.

In Context of the Matrix.



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