mesothyridid
From ZooTerms (Dictionary of Invertebrate Zoology)
Revision as of 14:28, 10 September 2013 by Andreas Plank (Talk | contribs)
mesothyridid (noun; Greek mesos, middle; thyridos, a window): (Brachiopoda) Pedicle opening partly in the ventral umbo and partly in the delthyrium, with beak ridges appearing to bisect the opening.
