is there any intellect who first observed and discussed this tiny bony structure?
Yes, Giovanni Filippo Ingrassia although there is some controversy regarding it
History
The stapes is commonly described as having been discovered by the professor Giovanni Filippo Ingrassia in 1546 at the University of Naples, although this remains the nature of some controversy, as Ingrassia's description was published posthumously in his 1603 anatomical commentary '. 
what are the 3 smallest bones in the human body Strapes is one of them what is the size of this above bone? Roughly 3 x 2.5mm which part of the body is this located? Middle ear of humans besides the human, is this bony structure present in other living species in the animal kingdom? It is one of three ossicles in mammals, in non-mammalian four-legged animals its homologous form is called the columella what are the functions this bony structure serves? It transmits sound vibrations from the incus to the oval window, a membrane-covered opening to the inner ear. are there any variations of this bony structure? It appears to be relatively constant in size in different ethnic groups can this bony structure get affected or impaired? Yes, its impairment causes conductive hearing loss is there any remedy to solve this? Two common treatments are stapedectomy and stapedotomy how is the first treatment that you mentioned - carried out? It is the surgical removal of the stapes and replacement with an artificial prosthesis what are some of the complications involved? Causes fibrosis-related damage to the base of the bone, or obliterative otosclerosis, resulting in obliteration of the base. what does the term otosclerosis mean? A condition where one or more foci of irregularly laid spongy bone replace part of normally dense enchondral layer of bony otic capsule in the bony labyrinth. what is the main difference between the treatment we discussed versus stapedotomy? In the former the Stapes is replaced by artificial prosthesis whereas in the latter an artificial prosthesis is inserted by making a small hole in the base of the stapes with reference to the tiny bone discussed earlier, when does the development of it begin? From the second pharyngeal arch during the sixth to eighth week of embryological life.
It is commonly described as having been discovered by the professor Giovanni Filippo Ingrassia . Giovanni Filippo Ingrassia UNANSWERABLE
Stapes Stapes
History History
The stapes is commonly described as having been discovered by the professor Giovanni Filippo Ingrassia in 1546 at the University of Naples, although this remains the nature of some controversy, as Ingrassia's description was published posthumously in his 1603 anatomical commentary '.  The stapes is commonly described as having been discovered by the professor Giovanni Filippo Ingrassia in 1546 at the University of Naples, 
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Stapes [SEP] History
The stapes is commonly described as having been discovered by the professor Giovanni Filippo Ingrassia in 1546 at the University of Naples, although this remains the nature of some controversy, as Ingrassia's description was published posthumously in his 1603 anatomical commentary '. Spanish anatomist Pedro Jimeno is first to have been credited with a published description, in ' (1549). The bone is so-named because of its resemblance to a stirrup (), an example of a late Latin word, probably created in mediaeval times from "to stand" (), as stirrups did not exist in the early Latin-speaking world.