Sphaerexochus atacius Ludvigsen 1979 (trilobite)

Trilobita - Phacopida - Cheiruridae

Full reference: R. Ludvigsen. 1979. A trilobite zonation of Middle Ordovician rocks, southwestern District of Mackenzie. Geological Survey of Canada Bulletin 312:1-98

Belongs to Sphaerexochus according to R. Ludvigsen 1979

Sister taxa: Sphaerexochus arenosis, Sphaerexochus arenosus, Sphaerexochus brandlyi, Sphaerexochus bridgei, Sphaerexochus britanicus, Sphaerexochus calvus, Sphaerexochus dimorphus, Sphaerexochus eurys, Sphaerexochus fibrisulcatus, Sphaerexochus glaber, Sphaerexochus hapsidotus, Sphaerexochus hiratai, Sphaerexochus hisingeri, Sphaerexochus johnstoni, Sphaerexochus laciniatus, Sphaerexochus latifrons, Sphaerexochus molongloensis, Sphaerexochus parvus, Sphaerexochus planirachis, Sphaerexochus pulcher, Sphaerexochus romingeri, Sphaerexochus scabridus, Sphaerexochus tuberculatus, Sphaerexochus valcourensis

Type specimen: GSC 40420, a cephalon/head (cranidium). Its type locality is Sunblood Range P-2038, which is in a Sandbian carbonate limestone in the Esbataottine Formation of Canada.

Ecology: fast-moving low-level epifaunal carnivore

Distribution:

• Ordovician of Canada (2: Northwest Territories collections)

Total: 2 collections each including a single occurrence

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Specimen images are retrieved through the ePANDDA API.


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