|
 |
|
|
|
 |
|
 |
|
|
| |
| DeROSEAR COLLECTION - Undescribed Trilobites |
|
OTHER US STATES
|
| Stock Number TTUSX103 |
|
|
|
|
Name:
Undescribed Dalmanites
Age: Silurian
Formation: Joliet Formation (Brandon Bridge Member)
Location: Waukeshia County, Wisconsin
Size: Trilobites are about 2.3 inches long
This specimen is not for sale
Click here for similar specimens that are for sale
This is a very unusual pair of Silurian trilobites. They are both undescribed species of Dalmanites from Wisconsin. This specimen was previously a part of the DeRosear Collection (Number 825). These unusual trilobites are featured on page 134 of the new Trilobite Book by Johnson. The description reads, "Dalmanites sp., from the Silurian, Joliet Formation, Waukesha County, Wisconsin. These...trilobites represent a previously unrecognized species and perhaps a new genus. Note the indented posterior rim at the center of the pygidium." That last sentence is very important - this type of Dalmanites has a distinct indentation, or notch, exactly where most Dalmanites have a long tailspine! The bugs are a natural, off-white color, which made them extremely dificult to photograph, but the actual quality is much better than the photo shows. This is a very rare offering of two undescribed Dalmanites acquired directly from the DeRosear Collection.
|
|
|
|
|
|
|
 |
|
 |
|
|
