part of part of in taxon develops from develops from Tetrapoda chondrocranium endochondral bone facial bone scleral cartilage scleral ossicle endochondral scleral ossicle UBERON:0010297 TAO:0001411 The scleral ossicles [of teleosts] are reported to form indirectly by endochondral (Hall and Miyake, 1992) or by perichondral ossification (Patterson, 1977) from a cartilage element that is also present in the sclera. This is unlike the scleral ossicles of reptiles, which develop directly from ectomesenchyme (i.e., intramembranous ossification) and independently from the scleral cartilage sclerotic bones ZFA:0001411 A pair of small dish-shaped bones that cap the anterior and posterior margin of the eyeball.[TAO]