The parietal bones form via intramembranous ossification. This means that during development the following structures are present, EXCEPT:

The correct answer is based on the understanding of the process of intramembranous ossification, which is responsible for the development of certain flat bones, primarily in the skull, including the parietal bones. Unlike endochondral ossification, which involves the formation of a cartilage model (hyaline template) before bone is created, intramembranous ossification occurs directly from mesenchymal tissue.

In intramembranous ossification, ossification centers form, where mesenchymal cells differentiate into osteoblasts, leading to the production of bone matrix. This process allows for the direct formation of bone without the intermediary cartilage structure. Periosteum, which is a connective tissue layer covering the bone, also develops during this process, further supporting bone growth and nourishment.

Therefore, the key distinction here is that hyaline cartilage is not present during the formation process of the parietal bones in intramembranous ossification. The absence of a hyaline template is what sets this type of ossification apart from others, such as endochondral. Hence, the correct answer indicates that a hyaline template is not involved in the development of the parietal bones through intramembranous ossification.