homovalvate en · ADJ
Etymology
From homo- + valvate.
Meanings
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(not-comparable) Having identical (top and bottom) valves (of a diatom)
Phase 1 involved heterovalvate, non-polar valves and spore-like frustules; phase 2 introduced more perforated, non-polar valves, and less spore-like frustules readily recognizable as diatoms even when modern valve-processes were absent; and phase 3 with homovalvate frustules and modern valve processes.
2015 October 21, “Auxosporulation in Paralia guyana MacGillivary (Bacillariophyta) and Possible New Insights into the Habit of the Earliest Diatoms”, in PLOS ONE, →DOI: