The Geology of Delaware

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Snails and Slugs: Phylum Mollusca, Class Gastropoda

Mollusca Gastropoda - Miocene Fossils<br>Source:  Wikimedia Commons

The Class Gastropoda (in Phylum Mollusca) includes the groups pertaining to snails and slugs. The majority of gastropods have a single, usually spirally, coiled shell into which the body can be withdrawn. The shell of these creatures is often what is recovered in a fossil dig. Gastropods are by far the largest class of molluscs, comprising over 80% of all molluscs.

The presence of gastropods, at the Pollack site, provides evidence to validate the researchers beliefs that, years ago, the environment was of shallow-water, near-shore locality.

Below are a few notable taxa recovered from the Pollack Farm site.

  • Gastrapoda:
  • Turritella cumberlandia
  • Diastoma insulaemaris
  • Epitonium charlestonensis
  • Urosalpinx cumberlandianus
  • Tritonopsis ecclesiastica
  • Nassarius sopora
  • Oliva simonsoni
  • Inodrillia whitfieldi

Click the image or the link below to view the gastropod collection!


Photographs from DGS Special Publication No. 21, 1998, R.N. Benson, ed.
Top left image: http:/ File:Orange_slug.jpg

Photo Gallery
1. Diadora griscomi (Conrad)<br>5. Tegula marylandicum (Martin)<br>9. Diastoma insulaemaris (Pilsbry and Harbison)<br>10,13. Carinorbis dalli (Whitfield)<br>11,12. Turritella cumberlandia (Conrad)
1. Crucibulum costatum (Say)<br> 2,3. Lunatia hemicrypta (Gabb)<br> 5. Lunatia heros (Say) <br>6. Sinum chesapeakensis (Campbell)
11. Epitonium charlestonensis (Johnson)<br>12. Murexiella cumberlandiana (Gabb)
3. Turritella tampae Dall<br>4. Turritella plebia ssp.<br>5. Serpulorbis granifera (Say), View of a number of individual with uncoiled whorls intertwined.
13-14. Calpytraea aperta (Solander)
8,9. Crepidula plana (Say)<br>12. Calyptraea aperta (Solander)
9-10. Ecphora tricostata (Martin)
1,3. Busycotypus scalarispira (Conrad)<br>2. Scaphella virginiana (Dall)