Untersuchungen zum Spermatozoendimorphismus von Opalia crenimarginata (Gastropoda, Prosobranchia)

Bulnheim, H. P.

doi:10.1007/bf00334791

Cited by 22 publications

(6 citation statements)

References 41 publications

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“…Earlier reports on other prosobranch species also indicate a nutritive function for atypical spermatozoa, e.g. Reinke (1914) for Strombus bituberculatus; Hanson et al (1952) for Vivipams viviparus; Battaglia (1953) for Columbella rustica; Bulnheim (1962) for Opalia crenimarginata, Scala clathrus and Janthina pallida; and Bulnheim (1968) for Epitonium tinctum. Hadfield (1966) reported that all atypical spermatozoa of S. squamigerus disintegrate within the male pallial gonoduct; he assumed the granules of the disintegrated atypical spermatozoa are incorporated in a layer of the spermatophoral wall, and he discussed their possible function as a nutrient for the typical spermatozoa.…”

Section: Discussionmentioning

confidence: 89%

Sperm Transfer in the Sessile Gastropod Serpulorbis (Prosobranchia: Verrnetidae)

Scheuwimmer¹

1979

Mar. Ecol. Prog. Ser.

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The mechanism of internal fertilization in vermetids has long remained obscure because these sessile gastropods are attached to the substrate throughout their adult life. In addition, in Serpulorbis jmbricatus spermatozoa production and egg laying occur in different seasons. In this study the following observations of the unique manner of sperm transfer in two Japanese species of Serpulorbis were made: The males produce spermatophores and expel them from the mantle cavity. A spermatophore consists of two concentric transparent spheres. The inner sphere contains the sperm mass, which is enclosed in a sperm sac. Spermatophores drifting in sea water are caught on mucus strings employed by Serpulorbis for food-particle collection. The mucus strings are hauled in and eaten together with the attached food particles. When, in this way, the spermatophore comes close to the mouth of the gastropod, the spermatophoral spheres are injured by jaws and radula, and the sperm sac is expelled from the inner sphere, guided by an extrusive tube. In the intact spermatophore, this tube lies inverted within the inner sphere. Then the sperm sac enters the mantle cavity in the inhalant respiratory current; the sperm mass is set free, and the spermatozoa can be carried into the slit-shaped female opening by the ciliary current of the pallial gonoduct. The typical spermatozoa stored with~n the females remain viable until fertilization. The PAS-positive granules of the atypical spermatozoa decrease in volume during sperm transfer and during storage in the female gonoduct. Finally the atypical spermatozoa disintegrate. It is assumed that they serve as 'trophocytes' for typical spermatozoa, as suggested by earlier authors for other prosobranch species.

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Section: Discussionmentioning

confidence: 89%

Sperm Transfer in the Sessile Gastropod Serpulorbis (Prosobranchia: Verrnetidae)

Scheuwimmer¹

1979

Mar. Ecol. Prog. Ser.

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“…The first studies on spermatic dimorphism were by Siebold in 1836 using Paludina vivipara and later others species of Prosobranches were studied by Brock (1887), Retzius (1906), Reinke (1912), Kuschakewitsch (1913), Ankel (1924), Tuzet (1930), Bulnheim (1962Bulnheim ( , 1968, Nishiwaki (1964), Tochimoto (1967), Hadfield (1969), Giusti and Selmi (1982b). The ultrastructure of spermatozoa of Prosobranches has been studied in numerous Prosobranches by Ishizaki and Kato (1958), Yasuzumi and Tanaka (1958), Walker and McGregor (1968), Bulnheim (1962b), Giusti (1971), Melone et al (1978Melone et al ( , 1980, Koike (1985), Healy (1986b).…”

Section: Discussionmentioning

confidence: 99%

Spermiogenesis in the vermetid gastropod Dendropoma petraeum (Gastropoda, Prosobranchia)

Lunetta

Damiani

2009

Eur J Histochem

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“…Although atypical spermatogenesis in Prosobranchia has been known since the last century (Koehler, 1888), and many studies using optical microscopy have been carried out on it, the electron microscope increases considerably our knowledge of this strange cell formation. Studies have been done on atypical spermatogenesis in Cipangopaludina malleata (Yasuzumi and Tanaka, 1958;Yasuzumi et al, 1959Yasuzumi et al, , 1966, Melania libertina (Yasuzumi et al, 1962;Bulnheim, 1962), Viviparus (Gall, 1961), Fusitriton oregonensis (Buckland Nicks et al, 1982), and Pyruzus (Healy et al, 1981;Healy, 1982).…”

Section: Introductionmentioning

confidence: 99%

Atypical spermatogenesis in Murex brandaris

Amor

Durfort

1990

Molecular Reproduction Devel

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Atypical spermatogenesis in Murex brandaris occurs in specific areas of the testis. In the early stages, a large nucleus is apparent, together with highly electrodense drops of chromatin spread through the caryoplasm. Many mitochondria are observed at one point of the cytoplasm, and numerous centrioles appear. In the following stages, vacuolization and degeneration of the chromatin are apparent, producing half moon-shaped chromatinic bodies called "caryomerites." Some degeneration of the chondrioma occurs too. Later, the chromatin degenerates and the centrioles produce cilia, while the Golgi body, highly secretory at this stage, produces electrodense PAS- as well as Thiery-positive granules. Moreover, a vermiform-shaped anuclear ciliated cell with numerous electrodense cytoplasmic granules is observed in the M. brandaris atypical spermatozoon.

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Untersuchungen zum Spermatozoendimorphismus von Opalia crenimarginata (Gastropoda, Prosobranchia)

Cited by 22 publications

References 41 publications

Sperm Transfer in the Sessile Gastropod Serpulorbis (Prosobranchia: Verrnetidae)

Sperm Transfer in the Sessile Gastropod Serpulorbis (Prosobranchia: Verrnetidae)

Spermiogenesis in the vermetid gastropod Dendropoma petraeum (Gastropoda, Prosobranchia)

Atypical spermatogenesis in Murex brandaris

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