Spermatogenesis in the marine snail Adelomelon ancilla (Volutidae) from Patagonia

Zabala, Soledad; Hermida, Gladys N.; Giménez, Juliana

doi:10.1093/mollus/eyr035

Cited by 4 publications

(2 citation statements)

References 29 publications

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“…These include substructural changes in the nucleus. The pattern of nuclear condensation in T. geversianus (with granular, fibrillar and lamellar phases) described by Henley (1973) has been reported in other caenogastropods (Healy, 1982; Buckland-Nicks et al , 1983; Suwanjarat & Klepal, 2001; Zabala et al , 2012).…”

Section: Discussionsupporting

confidence: 53%

Spermatogenesis and sperm morphology inTrophon geversianus(Gastropoda: Muricidae)

Giménez

2013

J. Mar. Biol. Ass.

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The ultrastructure of spermatogenesis, the euspermatozoa and paraspermatozoa, is investigated in Trophon geversianus. Spermatogenesis follows the general developmental pattern of caenogastropods. Paraspermatid development is characterized by elongation of the cell, concurrent with the appearance of a cytoplasmic elongation at the apex of the cell and the breakdown of the nucleus into small round fragments (caryomerites). Euspermatozoa consist of: a tall, conical acrosomal vesicle (with a invagination); a rod-shaped, highly electron-dense nucleus with an internal axoneme; an elongate midpiece consisting of the axoneme sheathed by helical mitochondrial elements; an elongate glycogen piece; and a short free-tail region. Paraspermatozoa of T. geversianus are vermiform. They contain approximately 12–16 axonemes arranged peripherally, numerous oblong dense vesicles, numerous less dense (round) vesicles, and scattered mitochondria. Most of the euspermatozoal features of T. geversianus are also observed in many neogastropods. However, the presence of the axoneme continuously located inside of the nucleus has not been reported before, and may prove to be a diagnostic feature of the Muricidae.

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Section: Discussionsupporting

confidence: 53%

Spermatogenesis and sperm morphology inTrophon geversianus(Gastropoda: Muricidae)

Giménez

2013

J. Mar. Biol. Ass.

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“…The presence of two types of sperm (euspermatozoa and paraspermatozoa) in A. ancilla has been previously reported (Zabala 2007;Zabala et al 2009) and their morphology shows similarities with other members of the Volutidae family like O. magellanica and Z. dufresnei (Giménez et al 2008). Results indicated that spermatozoa are present and attached to the female bursa copulatrix wall; however, the period of time in which they remain there could not be quantiWed.…”

Section: Gonadal Structurementioning

confidence: 86%

Reproduction and imposex in the edible snail Adelomelon ancilla from northern Patagonia, Argentina

et al. 2009

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The edible volutid snail Adelomelon ancilla occurs on the Argentine coast and may have the capacity to serve as source of support for local Wsheries. However, knowledge of its reproduction is lacking. Over 3 years (from September 2000 to July 2004) we studied the oviposition at Golfo Nuevo, Patagonia by diving. Monthly collections were performed to examine gonadal stages histologically during 2002-2003. Gamete development stages corresponded with the expected period for oviposition occurring from July to November, a time of increasing day length. Oviposition also took place in March when water temperature attained a maximum of 18°C. Following the spawning period, remaining gametes were resorpted in both sexes. Males contained sperm throughout the year, parasperm and eusperm forms were found within the same acinus. Oogonia/oocytes ranged from 20 to 240 m in diameter during oogenesis. Females commenced laying egg capsules from a shell length of 114 mm. Reproduction is compared with other Wshable volutid snails from the Argentine shelf, and suggests the need to apply certain Wshing restrictions if the resource begins to be utilized commercially. The imposex condition was found in snails from some shipping areas. The frequency of this condition declined with distance from the port.Communicated by M. Byrne.

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Phylum Mollusca

El-Bawab¹

2020

Invertebrate Embryology and Reproduction

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Spermatogenesis in the marine snail Adelomelon ancilla (Volutidae) from Patagonia

Cited by 4 publications

References 29 publications

Spermatogenesis and sperm morphology inTrophon geversianus(Gastropoda: Muricidae)

Spermatogenesis and sperm morphology inTrophon geversianus(Gastropoda: Muricidae)

Reproduction and imposex in the edible snail Adelomelon ancilla from northern Patagonia, Argentina

Phylum Mollusca

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