File:Parasite130059-fig1 Spermiogenesis in Pleurogenidae (Digenea).tif

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English: Spermiogenesis in Pleurogenidae (Digenea). Figure 1 from article.

Spermatozoon of Pleurogenes claviger, anterior and middle parts (Regions I and II).
(a) Longitudinal section of the anterior spermatozoon extremity (ASE).
(b, c) Consecutive sections of the anterior area of the sperm cell showing the two centrioles (C1 and C2) and the presence of the complete submembranous layer of parallel cortical microtubules (CM).
(d) Cross-section showing the appearance of the first mitochondrion (M1) and two attachment zones (arrowheads).
(e–g) Longitudinal and cross-sections of the ornamented area of the spermatozoon. Note the presence of external ornamentation of the plasma membrane (EO), spine-like bodies (SB) and the second mitochondrion (M2). In this area, the cortical microtubules are organized into two fields separated by four attachment zones (arrowheads). M1, first mitochondrion.
(h) Cross-section of the middle part of the spermatozoon (Region II) showing the appearance of granules of glycogen (G) and the presence of only the second mitochondrion (M2).

Scales in μm: 0.3.
Date
Source Miquel, J., Vilavella, D., Swiderski, Z., Shimalov, V. V. & Torres, J. 2013: Spermatological characteristics of Pleurogenidae (Digenea) inferred from the ultrastructural study of Pleurogenes claviger, Pleurogenoides medians and Prosotocus confusus. Parasite, 20, 28. doi:10.1051/parasite/2013028
Author Jordi Miquel, Daniel Vilavella, Zdzisław Świderski, Vladimir V. Shimalov and Jordi Torres

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This file was published in the scientific journal Parasite. Their website states that all content of the journal including and after 2013 is published under the Creative Commons Attribution 4.0 license.

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