Ischyrotoma twenhofeli Raymond 1925 (trilobite)

Trilobita - Proetida - Dimeropygidae

Full reference: P. E. Raymond. 1925. Some trilobites of the lower Middle Ordovician of eastern North America. Bulletin of the Museum of Comparative Zo├Âlogy at Harvard College 67(1):1-180

Belongs to Ischyrotoma according to P. E. Raymond 1925

Sister taxa: Ischyrotoma anataphra, Ischyrotoma borealis, Ischyrotoma eos, Ischyrotoma juabensis, Ischyrotoma parallela, Ischyrotoma sila, Ischyrotoma stubblefieldi, Ischyrotoma wahwahensis

Type specimen: YPM 13055, a cephalon/head

Ecology: fast-moving low-level epifaunal deposit feeder

Distribution:

• Whiterockian of Canada (1: Newfoundland and Labrador collection), Norway (1)

• Ordovician of Canada (1: Newfoundland and Labrador)

Total: 3 collections each including a single occurrence

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Specimen images are retrieved through the ePANDDA API.


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