Spermatozoon ultrastructure and phylogenetic relationships in the monogeneans (platyhelminthes)

Justine, Jean‐Lou; Lambert, Alain; Mattei, Xavier

doi:10.1016/0020-7519(85)90004-9

Cited by 78 publications

(35 citation statements)

References 21 publications

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“…b. The different types of spermatozoa, numbered according to Justine et al (1985). c. The oncomiracidial types of ciliation, based on Lambert's (1980b) observations, but interpreted here in accordance with my assumption of a progressive evolution.…”

Section: Methodsmentioning

confidence: 74%

“…(1979); "swimming larvae" from eggs expelled from urinary bladder; "creeping larvae" (unciliated), hatched in uterus (ovoviviparity), not leaving the urinary bladder, developing to oviparous adults, producing the "swimming larvae". Spermatozoon: See Justine et al (1985); pattern 1, i.e. the same pattern as in the Mazocraeidea and Hexabothriidae (1).…”

Section: Remarkmentioning

confidence: 99%

“…Spermatozoon: See Justine et al (1985), Justine & Mattei (1985); pattern 3, i.e. the same pattern as in the Monocotylidae (3).…”

Section: Site: Gills (G)mentioning

confidence: 99%

“…Furthermore, during the last ten years or so, Lambert (1980a,b) has added to the discussion by his analysis of ciliated tegumental cells of the oncomiracidia, larval chaetotaxy and post-larval development of the haptor. Another new important parameter has been introduced to the discussion by Justine et al (1985), i.e. the use of ultrastructural spermatozoon patterns for the estimation of possible relationships between monogenean families.…”

Section: Introductionmentioning

confidence: 99%

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On the ontogeny of the haptor and the evolution of the Monogenea

Malmberg

1990

Syst Parasitol

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Data on the ontogeny of the posterior haptor of monogeneans were obtained from more than 150 publications and summarised. These data were plotted into diagrams showing evolutionary capacity levels based on the theory of a progressive evolution of marginal hooks, anchors and other attachment components of the posterior haptor in the Monogenea (Malmberg, 1986). 5 + 5 unhinged marginal hooks are assumed to be the most primitive monogenean haptoral condition. Thus the diagrams were founded on a 5 + 5 unhinged marginal hook evolutionary capacity level, and the evolutionary capacity levels of anchors and other haptoral attachement components were arranged according to haptoral ontogenetical sequences. In the final "plotting diagram" data on hosts, type of spermatozoa, oncomiracidial ciliation, sensilla pattern and protonephridial systems were also included. In this way a number of correlations were revealed. Thus, for example, the number of 5 + 5 marginal hooks correlates with the most primitive monogenean type of spermatozoon and with few sensillae, many ciliated cells and a simple protonephridial system in the oncomiracidium. On the basis of the reviewed data it is concluded that the ancient monogeneans with 5 + 5 unhinged marginal hooks were divided into two main lines, one retaining unhinged marginal hooks and the other evolving hinged marginal hooks. Both main lines have recent representatives at different marginal hook evolutionary capacity levels, i.e. monogeneans retaining a haptor with only marginal hooks. For the main line with hinged marginal hooks the name Articulonchoinea n. subclass is proposed. Members with 8 + 8 hinged marginal hooks only are here called Proanchorea n. superord. Monogeneans with unhinged marginal hooks only are here called Ananchorea n. superord, and three new families are erected for its recent members: Anonchohapteridae n. tam., Acolpentronidae n. tam. and Anacanthoridae n. tam. (with 7 + 7, 8 + 8 and 9 + 9 unhinged marginal hooks, respectively). Except for the families of Articulonchoinea (e.g. Acanthocotylidae, Gyrodactylidae, Tetraonchoididae) Bychowsky's (1957) division of the Monogenea into the Oligonchoinea and Polyonchoinea fits the proposed scheme, i.e. monogeneans with unhinged marginal hooks form one old group, the Oligonchoinea, which have 5 + 5 unhinged marginal hooks, and the other group form the Polyonchoinea, which (with the exception of the Hexabothriidae) has a greater number (7 + 7, 8 + 8 or 9 + 9) of unhinged marginal hooks. It is proposed that both these names, Oligonchoinea (sensu mihi) and Polyonchoinea (sensu mihi), will be retained on one side and Articulonchoinea placed on the other side, which reflects the early monogenean evolution. Except for the members of Ananchorea [Polyonchoinea], all members

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Section: Methodsmentioning

confidence: 74%

Section: Remarkmentioning

confidence: 99%

“…Spermatozoon: See Justine et al (1985), Justine & Mattei (1985); pattern 3, i.e. the same pattern as in the Monocotylidae (3).…”

Section: Site: Gills (G)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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On the ontogeny of the haptor and the evolution of the Monogenea

Malmberg

1990

Syst Parasitol

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“…In the past, this parasite has attracted attention of numerous investigators and various aspects of biology of Calicotyle were studied using molecular and morphological methods, including electron microscopy. Ultrastructural sperm characters are of special phylogenetic importance in the Platyhelminthes (Justine et al, 1985;Rohde, 1988;Justine, 1991aJustine, , b, 1993Justine, , 1998Justine, , 2001Hoberg et al, 2001;Bruňanská, 2010;Levron et al, 2010;Kearn & Whittington, 2015). Even at the genus level, sperm characteristics may contribute to Cross-section through the base of the zone of differentiation.…”

Section: Introductionmentioning

confidence: 99%

Spermiogenesis and sperm ultrastructure inCalicotyle affinisScott, 1911 (Platyhelminthes, Monogenea, Monopisthocotylea, Monocotylidae)

Bruňanská

Poddubnaya

2017

Helminthologia

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Summary Spermatological characteristics of Calicotyle affi nis Scott, 1911, an endoparasitic monocotylid monogenean from the cloaca of a holocephalan fi sh Chimaera monstrosa L, have been investigated by means of transmission electron microscopy for the fi rst time. Spermiogenesis exhibits features basically similar to those of the congeneric Calicotyle kroyeri and Calicotyle australiensis, but there are some new fi ndings with respect to the formation and fi ne structure of the spermatozoon including the remarkable complex end-piece (EP). Morphogenesis of the EP, which is located at the anterior (proximal) region of the late spermatid, includes two stages: (1) the centriolar region is continuous with a cytoplasmic mass of the zone of differentiation, the electron-dense surface of the spermatid undergoes signifi cant changes in the sculpturing and the inner core of developing spermatid is electron-lucent; (2) after central fusion of the arching membranes a defi nitive structure of the EP is subsequently evolved, fi nally comprising 3 -4 electron-dense discs attached to a central common electron-lucent column. The EP is considered as a synapomorphy of the genera Calicotyle + Dictyocotyle. The mature spermatozoon of C. affi nis comprises the EP, two parallel axonemes of almost equal lengths with the 9 + "1" trepaxonematan pattern, mitochondrion, nucleus, and a reduced number of parallel cortical microtubules (1 -3). The posterior (distal) extremity of the mature spematozoon contains a single tapering axoneme. Ultrastructural characteristics of the mature spermatozoon of C. affi nis coincide mostly with those of congeneric C. australiensis. Variations of the spermatological characters within the genus Calicotyle, between Calicotyle and enigmatic Dictyocotyle as well as other monocotylid monogeneans are discussed.

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Ultrastructure of spermatozoa of the lung fluke, Paragonimus ohirai (Trematoda: Troglotrematidae), in the seminal receptacle

Orido

1988

Journal of Morphology

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The seminal receptacle of Paragonimus ohirai contains not only mature spermatozoa, but also atypical and degenerate ones, suggesting that abnormal spermatozoa are retained in this organ. The spermatozoon is of a parallel biflagellar type with cortical microtubules, consisting of the anterior region, first mitochondrial region, intermediate (amitochondrial) region, second mitochondrial region, posterior nuclear region (PNR) and tail region (TR). The first third of the spermatozoon exhibits typical undulatory movement, while the middle part shows vibratory movement. At the area between head and midsections (H-M area) the peripheral doublets of axonemes are interrupted, and the external ornamentation is distributed widely around this portion. Throughout the immotile PNR and TR, the axonemes lack the dynein arms of their peripheral doublets. H-M, PNR, and TR ultrastructural characteristics are specific in P. ohirai spermatozoon and seem to be closely related to its pattern of movement.

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Spermatozoon ultrastructure and phylogenetic relationships in the monogeneans (platyhelminthes)

Cited by 78 publications

References 21 publications

On the ontogeny of the haptor and the evolution of the Monogenea

On the ontogeny of the haptor and the evolution of the Monogenea

Spermiogenesis and sperm ultrastructure inCalicotyle affinisScott, 1911 (Platyhelminthes, Monogenea, Monopisthocotylea, Monocotylidae)

Ultrastructure of spermatozoa of the lung fluke, Paragonimus ohirai (Trematoda: Troglotrematidae), in the seminal receptacle

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