periplastronal en · ADJ
Etymology
From peri- + plastronal.
Meanings
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(not-comparable) Surrounding a plastron
The landmark configuration included the shape of the periplastronal ambulacrals and paired petals.
2016 February 6, “Ecophenotypic Variation and Developmental Instability in the Late Cretaceous Echinoid Micraster brevis (Irregularia; Spatangoida)”, in PLOS ONE, →DOI: