Trilobita - Proetida - Dimeropygidae

Alternative combination: Ischyrophyma borealis

Full reference: R. A. Fortey. 1980. The Ordovician trilobites of Spitsbergen. III. Remaining trilobites of the Valhallfonna Formation. Norsk Polarinstitutt Skrifter 171:1-163

Belongs to Ischyrotoma according to J. M. Adrain et al. 2001

See also Fortey 1980

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

Type specimen: SM A 84343, a pygidium

Ecology: fast-moving low-level epifaunal deposit feeder

Distribution: found only at Zone V4b, Ny Friesland ( of Norway)

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Specimen images are retrieved through the ePANDDA API.