Abstract
The pineal gland structure and ultrastructure in the Northern (Blarina brevicauda) and Southern short-tailed shrew (Blarina carolinensis) are described by light and electron microscopy. Results observed were similar to other mammals of Insectivora described previously, specifically, the hedgehog (Erinaceus europaeus) and the Old World mole (Talpa europea). Two different types of pinealocytes were noticed by electron microscopy, in addition to relatively few glial cells. Granular vesicles were not noticed in abundance. The granular endoplasmic reticulum was observed and studded with vesicles. The golgi apparatus was well developed and appeared often. Synaptic ribbons were observed in several different formations consisting of ribbons and/or rods. The ciliary derivative, the rudimentary photoreceptor structures found in the pinealocytes of population I, was noticed in a 9 + 0 tubular pattern. Within these semifossorial shrews, the relationship between specific intracellular organelles and their function was discussed.
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Acknowledgments
The authors thank Fran A. Jr., Helen D. and Sinai H. C Manno for their support. The authors would like to acknowledge Dr. K. A. C for his support and assistance with data collection. The author (F.A.M.M.) is indebted to Dr. K. A. C. for the –C grade on the original manuscript; in consequence, endowing the drive to see through its publication. The authors would like to thank the Research Grants Council HKPFS # PF16-07754 to F.A.M.M. for allowing the continuation of an old project.
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Manno, F.A.M., Lau, C. The pineal gland of the shrew (Blarina brevicauda and Blarina carolinensis): a light and electron microscopic study of pinealocytes. Cell Tissue Res 374, 595–605 (2018). https://doi.org/10.1007/s00441-018-2897-8
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DOI: https://doi.org/10.1007/s00441-018-2897-8