3D model of a fossil snail shell covered in barnacles.

Virtual Collection: Class Hexanauplia

This virtual collection was last curated by Jonathan Hendricks on April 24, 2019. Each model is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License. Unless otherwise indicated, each model was created by Emily Hauf using specimens at the Paleontological Research Institution, Ithaca, New York.

Subclass Thecostraca

Infraclass Cirripedia (barnacles)

Order Sessilia

Family Balanidae

Fossil barnacles Balanus sp. that have encrusted the shell of a gastropod (Hysterivasum sp.); specimen is from the Pliocene Tamiami Fm. (Pinecrest Beds) of Sarasota County, Florida. Specimen is from the collections of the Paleontological Research Institution, Ithaca, New York. Length of specimen is approximately 7 cm.


Fossil specimens of the barnacle Balanus concavus on a scallop shell from the Miocene of Virginia. Specimen is from the research collections of the Paleontological Research Institution, Ithaca, New York. Width of scallop is approximately 10 cm.


Fossil specimen of the barnacle Chesaconcavus sp. from the Pliocene Tamiami Fm. of Sarasota County, Florida (PRI 44660). Specimen is from the collections of the Paleontological Research Institution, Ithaca, New York. Longest dimension of specimen is approxiately 16 cm.


Fossil specimens of the barnacle Concavus concavus from the Pliocene Yorktown Formation of Hampton, Virginia (PRI 76866). Specimen is from the research collections of the Paleontological Research Institution, Ithaca, New York. Maximum diameter of specimen is approximately 4.5 cm.


Modern specimen of the whelk snail Busycon carica from Beaufort County, South Carolina (PRI 76867). Encrusting barnacles cover much of the shell. Specimen is from the research collections of the Paleontological Research Institution, Ithaca, New York. Length of shell is approximately 12.5 cm.


Family Pyrgomatidae (coral barnacles)

Fossil specimen of the scleractinian coral Siderastrea dalli, with the coral Dichocoenia eminens growing upon it; also present are the coral barnacles Ceratoconcha prefloridana, as well as other small encrusters. Specimen is from the Pleistocene Caloosahatchee Formation of Florida (PRI 76789). Specimen is from the collections of the Paleontological Research Institution, Ithaca, New York. Longest dimension of specimen is approximately 12 cm.


Fossil scleractinian coral Astrangia sp. with associated Ceratoconcha and Balanus barnacles (PRI 76863). Specimen is from the Pleistocene Fort Thompson Formation of Hillsborough County, Florida. Specimen is from the research collections of the Paleontological Research Institution, Ithaca, New York. Longest dimension of specimen is approximately 12 cm.