Adjective
Of the facial sutures of a trilobite, having a pattern in which the posterior sutures cross the lateral border, then swing inward and backward to meet the posterior margin.
Usage- not-comparable
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More examples (1)
[…] [T]he shape of the occipital ring, the small number of thoracic segments, and the pygidial morphology, as well as the cedariiform suture - are not known in any proetid.