Publikace detail

Developmental Origin of the Frontoparietal Bone in Bombina variegata (Anura: Discoglossidae)

Autoři: Čihák Radomír | Královec Karel | Roček Zbyněk

Rok: 2003

Druh publikace: článek v odborném periodiku

Název zdroje: Journal of Morphology

Název nakladatele: Wiley-Blackwell

Strana od-do: 122-129

Tituly:

Jazyk	Název	Abstrakt	Klíčová slova
cze	Ontogenetický vývoj os frontoparietale u Bombina variegata (Anura: Discoglossidae)		Anura;Discoglossidae;Bombina variegata;frontoparietal complex;development
eng	Developmental Origin of the Frontoparietal Bone in Bombina variegata (Anura: Discoglossidae)	Development of the frontoparietal bone in the European yellow-bellied toad, Bombina variegata, was followed on the basis of histological analysis of transverse serial sections through the larval skulls to recognize early stages of ossification represented by osteoid (uncalcified bone matrix) and on cleared and stained specimens to investigate more advanced stages. Ossification of the frontal begins as three tiny areas of osteoid (F1, F2, F3) adjoining the dorsal surface of the orbital cartilage, which are separated by areas without osteoid. F3 is the largest (most advanced). Prior to calcification, F3 extends to fuse with F2 and then with F1, but it does not expand over the prootic fissure posteriorly. As calcification begins the strip of bone is joined posteromedially by F4. Only then does a single ossification center corresponding to the parietal arise on the anterodorsal surface of the otic capsule. This ossification sequence corresponds to those observed in the Actinopterygii and in caudate amphibians.	Anura;Discoglossidae;Bombina variegata;frontoparietal complex;development

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