a spore produced in a theca, an ascospore. [Compare French thécaspore (1837 or earlier).]
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the world > plants > part of plant > reproductive part(s) > spore or sporule > [noun] > type of > thecospore or ascus
ascus1830
thecospore1858
macrocyst1874
ascogonium1875
ascospore1875
cleistocarp1887
1858 E. Lankester & W. B. CarpenterVeg. Physiol. (new ed.) §405 The Lichens produce conceptacles,..called apothecia,..which develope in their interior little bodies, called thecaspores.