Ultrastructure of sperm and spermatogenesis of Anoplodiscus cirrusspiralis (Platyhelminthes, Monogenea, Monopisthocotylea)

Author： Watson N. A.   Rohde K.  

Publisher： Edp Sciences

E-ISSN： 0003-4150|67|5|131-140

ISSN： 0003-4150

Source： Annales de Parasitologie Humaine et Comparé, Vol.67, Iss.5, 2016-08, pp. : 131-140

Disclaimer: Any content in publications that violate the sovereignty, the constitution or regulations of the PRC is not accepted or approved by CNPIEC.

Previous Menu Next

Abstract

The mature spermatozoon of Anoplodiscus cirrusspiralis is long and filiform with a nucleus, mitochondrion and single axoneme pressed tightly together for most of its length. In contrast to most other platyhelminthes which have a solid central unit in the complex central element of the sperm axoneme (Trepaxonemata), the central unit in Anoplodiscus is a hollow cylinder. There are no peripheral microtubules in the sperm, and the arrangement conforms to sperm pattern 4 in the scheme of Justine et al. (1985) for the Monogenea (found in monopisthocotyleans from the orders Dactylogyridea and Tetraonchidea). However, spermatogenesis is distinctly different in Anoplodiscus. A short free axoneme rotates and fuses with the spermatid body, then continues to grow alongside the elongating nucleus and the gradually fusing mitochondria. There is no cytoplasmic outgrowth in the original direction of the axoneme, and the nucleus and mitochondria do not migrate past the basal body of the axoneme, as happens in other mono- pisthocotylean Monogenea. As other evidence suggests that Anoplodiscus is a monogenean, it is concluded that spermiogenesis is aberrant and a case of temporary deviation in ontogeny, not affecting the outcome of mature sperm structure.

Related content

Oncomiracidium, morphogenèse du hapteur et ultrastructure du spermatozoïde de Pseudodactylogyrus anguillae (Yin et Sproston, 1948) Gussev, 1965 (Monogenea, Monopisthocotylea, Pseudodactylogyridae n. fam.)

By Le Brun N.   Lambert A.   Justine J.-L.  

Annales de Parasitologie Humaine et Comparé, Vol. 61, Iss. 3, 2016-08 ,pp. : 273-284 (12)

Edp Sciences

Access to resources Recommend Favorite

Présence chez un Nandidae (Téléostéen), Polycentropsis abbreviata Boulenger, 1901, du genre Cichlidogyrus (Monogenea, Monopisthocotylea, Ancyrocephalidae)

By Birgi E.   Lambert A.  

Annales de Parasitologie Humaine et Comparé, Vol. 61, Iss. 5, 2016-08 ,pp. : 521-528 (8)

Edp Sciences

Access to resources Recommend Favorite

Ultrastructure of the flame bulbs and protonephridial capillaries of Rugogaster hydrolagi (Platyhelminthes, Trematoda, Aspidogastrea)

By Watson N. A.   Rohde K.  

Annales de Parasitologie Humaine et Comparé, Vol. 67, Iss. 3, 2016-08 ,pp. : 67-74 (8)

Edp Sciences

Access to resources Recommend Favorite

Protolamellodiscus raibauti n. sp., une nouvelle espèce de Diplectanidae Bychowsky, 1957 (Monogenea, Monopisthocotylea) parasite de Diplodus annularis (Linnaeus, 1758) (Sparidae)

By Oliver G.   Radujkovic B.  

Annales de Parasitologie Humaine et Comparé, Vol. 62, Iss. 3, 2016-08 ,pp. : 209-213 (5)

Edp Sciences

Access to resources Recommend Favorite

Homogeneity of sperm structure in six species of Schistosomes (Digenea, Platyhelminthes)

By Justine J.-L.   Jamieson B. G. M.   Southgate V. R.  

Annales de Parasitologie Humaine et Comparé, Vol. 68, Iss. 4, 2016-08 ,pp. : 185-187 (3)

Edp Sciences

Access to resources Recommend Favorite