Trilobita - Phacopida - Cheiruridae
Alternative spellings: Cheirurus (Nieszkowskia), Pseudosphaerexochus (Nieszkowskia)
Parent taxon: Acanthoparyphinae according to F. Nikolaisen 1961
See also Edgecombe et al. 1999, Jell and Adrain 2002, Raymond 1905, Schmidt 1881, Sepkoski 2002 and Warburg 1925
Sister taxa: Acanthoparypha, Pandaspinapyga
Subtaxa: Nieszkowskia cephaloceras Nieszkowskia cephaloceros Nieszkowskia excelsus Nieszkowskia jakei Nieszkowskia norvegica Nieszkowskia satyrus Nieszkowskia tumida Nieszkowskia yongyii Pseudosphaerexochus (Nieszkowskia) satyrus
Type: Sphaerexochus cephaloceros
Ecology: fast-moving low-level epifaunal carnivore
Distribution:
• Chazyan of Canada (1: Quebec collection), United States (1: New York)
• Whiterockian of Canada (1: Quebec), United States (3: New York)
• Volkhov of the Russian Federation (6)
• Ordovician of Argentina (15), Estonia (2), the Netherlands (1), Norway (4), the Russian Federation (3), Sweden (7), the United Kingdom (1), United States (2: Utah)
Total: 47 collections each including a single occurrence
Specimen images are retrieved through the ePANDDA API.
Click image to enlarge. Click to access iDigBio record.