Bolbocephalus convexus Billings 1865

Trilobita - Proetida - Bathyuridae

Alternative combination: Dolichometopus convexus

Synonym: Bolbocephalus groenlandicus Poulsen 1937

Belongs to Bolbocephalus according to R. A. Fortey and D. L. Bruton 2013

See also Boyce 1989 and Fortey 1979

Sister taxa: Bolbocephalus (Hadrohybus), Bolbocephalus ellesmerensis, Bolbocephalus glaber, Bolbocephalus gunnari, Bolbocephalus jeffersonensis, Bolbocephalus kindlei, Bolbocephalus myktos, Bolbocephalus seelyi, Bolbocephalus stclairi, Bolbocephalus stitti

Type specimens:

  • Bolbocephalus convexus: GSC 718, a pygidium
  • Bolbocephalus groenlandicus: Its type locality is eastern arm of anticline, Ella Island, which is in an Arenig carbonate limestone in the Cape Weber Formation of Greenland.


• Arenig of Greenland (2 collections)

• Ordovician of Canada (40: Newfoundland, Newfoundland and Labrador, Ontario, Quebec), Norway (2), United States (3: Oklahoma)

• Canadian of Canada (1: Newfoundland and Labrador)

• Ibexian of Canada (1: Quebec)

• Skullrockian of Canada (1: Newfoundland)

Total: 50 collections each including a single occurrence

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Specimen images are retrieved through the ePANDDA API.

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