Trilobita - Phacopida - Pterygometopidae
Alternative combination: Pterygometopus annulatus
Synonym: Pterygometopus gracilens Raymond 1925
Belongs to Calyptaulax according to F. C. Shaw and T. E. Bolton 2011
See also Raymond 1925 and Shaw 1968
Sister taxa: Calyptaulax angusta, Calyptaulax brongniartii, Calyptaulax callicephalus, Calyptaulax callirachis, Calyptaulax cornwalli, Calyptaulax glabella, Calyptaulax holstonensis, Calyptaulax hunteri, Calyptaulax incepta, Calyptaulax norvegicus, Calyptaulax sillimani, Calyptaulax strasburgensis
Type specimens:
- Calyptaulax annulata: Carnegie Mus1384 (lectotype), a cephalon/head (cranidium).
- Pterygometopus gracilens: MCZ 1725.
Ecology: fast-moving low-level epifaunal carnivore
Distribution:
• Whiterockian of Canada (6: Quebec collections), United States (13: New York, Vermont)
• Chazyan of United States (17: New York, Oklahoma)
• Ordovician of United States (1: Oklahoma)
Total: 37 collections each including a single occurrence
Specimen images are retrieved through the ePANDDA API.
Click image to enlarge. Click to access iDigBio record.