Aff Neocalmonia
Trilobites Order Phacopida, Superfamily Acastoidea, Family Acastidae, Subfamily Asteropyginae
Geological Time: Lower Devonian
Size (25.4 mm = 1 inch): Trilobite is 30 mm long (curve measure) by 14 mm wide at spine tips on a 60 by 45 mm matrix
Fossil Site: Taouz, Morocco
Code: 15021
Price: Sold
 Description:
An elegant example of a member of the Order Phacopida, Subfamily
Asteropyginae with many fine details present. While the Asteropyginae
recently have undergone revision, this one still seems to need
some work. The most distinguishing feature of the specimen is that
unlike most others in the group it possesses four lateral pygidial
spines rather than five. I sought the advice of one of the premier
collectors of Moroccan trilobites and learned that there are three
genera that have this feature: Destombesina, Minicryphaeus, and
Neocalmonia, with only Neocalmonia having long spines such as this.
There are several subgenera, but I will be content with labelling
it aff Neocalmonia for now. |
