Abstract
Two new species of cheilostome Bryozoa are described: Pentapora boreale sp. nov. and Microporella svalbardensis sp. nov. Both are illustrated using scanning electron microscopy. The genus Pentapora is recorded for the first time from the Arctic realm. Pentapora boreale is especially characterized by a columnar umbo present proximal to the primary orifice and a straight‐edged lyrula developed just within the proximal border of the orifice. Microporella svalbardensis is distinguished by a large, crescentic ascopore, crossed by thin radial bars, with a prominent umbo situated just proximal to it. Colonies of both species encrusted pebbles, and M. svalbardensis occurred additionally on biogenic carbonate substrata.
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