Assertion: sponge's spicule | /r/Synonym | keratose
Facets:
value: historically
type: TEMPORAL
Source sentences:
text: The major groups include three orders possessing tetraxonic spicules (Spirophorida, Astrophorida, and part of the “Lithistida”), three orders lacking siliceous spicules that were historically called keratose or horny sponges (Dictyoceratida, Dendroceratida, and Verongida), a single large order based on the possession ‘chelae’ microscleres (order Poecilosclerida) and a single large order based on the possession of skeletons built in a reticulate arrangement of simple diactinal spicules called ‘oxeas’ and ‘strongyles’ (order Haplosclerida).