Spermatogenesis of Haplopharynx rostratus (Platyhelminthes, Haplopharyngida)

During spermatogenesis, nuclei of spermatids are at first large with an irregular outline, containing chromatin granules; then condense to become round containing dense chromatin; then elongate containing loose fibrillar chromatin. Golgi bodies produce dense granules. Immature sperm in the testis ar...

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Bibliographic Details
Published inBelgian journal of zoology Vol. 128; no. 2
Main Authors Rohde, K. (University of New England, Armidale (Australia). School of Biological Sciences), Faubel, A
Format Journal Article
LanguageEnglish
Published 01.12.1998
Subjects
ESPERMATOGENESIS
ESPERMATOZOO
FILOGENIA
MAR DEL NORTE
MER DU NORD
MICROSCOPIA
MICROSCOPIE
MICROSCOPY
NORTH SEA
PHYLOGENIE
PHYLOGENY
PLATYHELMINTHES
SEMEN
SPERMATOGENESE
SPERMATOGENESIS
SPERMATOZOA
SPERMATOZOIDE
SPERME
TESTES
TESTICULE
TESTICULOS
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Summary:During spermatogenesis, nuclei of spermatids are at first large with an irregular outline, containing chromatin granules; then condense to become round containing dense chromatin; then elongate containing loose fibrillar chromatin. Golgi bodies produce dense granules. Immature sperm in the testis are amoeboid, aflagellate, with numerous peripheral microtubules. Mature sperm in the sperm duct have a nucleated part with a narrow layer of cytoplasm drawn out into two flanges, and a thicker non-nucleated part. Peripheral microtubules and dense thickenings of the plasma membrane are present in both parts. Two symmetrically arranged blunt bristle-like structures, apparently modified large granules that do not reach the surface, are located in the nucleated part. Sperm structure supports the view that Haplopharyngida and Macrostomida are closely related.
Bibliography:1999001126
L53
ISSN:0777-6276