Oncomiracidiums et phylogenèse des Monogenea (Plathelminthes)

Lambert, Alain

doi:10.1051/parasite/1980552165

Cited by 23 publications

(15 citation statements)

References 30 publications

(38 reference statements)

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“…2, see e.g. Gerasev (1981); in the peduncle are two peduncular anchor anlages which move into the haptor (Lambert, 1980a) where each anlage develops into a dorsally orientated anchor (Prost, 1963;Kearn, 1968a; my own observations); a bar develops on the ventral side of the anchors (although in the dorsal half of the haptor); in a number of species an extra bar-like structure develops in the ventral half of the haptor, although morphologically on the dorsal side of the anchors. Opisthaptor: 8 + 8 marginal hooks, no.…”

Section: Remarkmentioning

confidence: 99%

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: Remarkmentioning

confidence: 99%

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

Malmberg

1990

Syst Parasitol

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“…Two other sources of potential characters, morphometric and ontogenetic, were investigated and, although the potential usefulness of morphometric characters in cladistics has, convincingly, been argued for (e.g. Archie, 1985), the amount of morphometric data based on the species under investigation was insufficient to distinguish discrete characters: in addition, studies of the morphology of monogenean onchomiracidia (Lambert, 1980a(Lambert, , 1980b appear to indicate that ontogenetic variation is only sufficiently distinct at higher taxonomic levels for interpreting phylogenies.…”

Section: Discussionmentioning

confidence: 99%

North American freshwater ancyrocephalids (Monogenea) with articulating haptoral bars: phylogeny reconstruction

Klassen

Beverley‐Burton

1988

Syst Parasitol

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A phylogenetic (cladistic) analysis was conducted for 15 ancyrocephalid (Monogenea) species parasitizing North American freshwater fishes. The analysis was based on 10 (four binary and six multistate) characters. Vaginal characters were not included due to insufficient data. The resultant, most parsimonious cladogram was 38 steps long with a consistency index of 0.921: reduced consistency was attributed to two cases of homoplasy and one reversal. Three unresolved polychotomies were observed. Three clades were recognized: clade 1 --Actinocleidus species; clade 2 -Anchoradiscoides, Anchoradiscus, Clavunculus species and Syncleithrium; and clade 3 --Crinicleidus species. The protocol for and implications of character identification and polarisation and the establishment of transformation series were discussed.

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“…L'étude de la morphologie générale et du hapteur a été faite sur des larves observées in vivo. Les imprégnations argentiques ont été réalisées selon la méthode décrite par Lambert (1980a) : imprégnation directe par une solution de AgN03 à 6 %, révélation à la lumière solaire, rinçage et montage direct dans une gomme au chloral (Liquide de Faure). Les larves sont dessinées immédiatement à la chambre claire (Wild M 20).…”

Section: -Matériel Et Méthodesunclassified

“…2 -par la morphogenèse du hapteur : Dans le cadre de notre hypothèse sur la migration généralisée des onchoblastes chez les Dactylogyridea (Lambert, 1980a), cet exemple est le seul cas connu de migration des seuls hamuli ventraux. Si nous considérons comme primitif le modèle Ancyrocephalidae (fig.…”

Section: Anguilla Anguillaunclassified

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

Brun¹,

Lambert²,

Justine

1986

Ann. Parasitol. Hum. Comp.

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RÉSUMÉ. Les Monogènes récoltés chez l'Anguille Anguilla anguilla dans les eaux douces du Sud-Est de la France sont assimilés à Pseudodactylogyrus anguillae d'après les caractères morpho anatomiques de l'adulte. La chétotaxie, les cellules ciliées, le système excréteur et le hapteur de l'oncomiracidium sont décrits pour la première fois. L'ultrastructure du spermatozoïde montre un seul axonème et aucun microtubule cortical. Ces données confirment l'appartenance de ce Monogène au type Dactylogyridea. La position spécifique de P. anguillae est discutée. Une étude morphologique comparée du développement post-larvaire chez les Dactylogyridea nous amène à proposer une nouvelle famille, les Pseudodactylogyridae, pour ces Monogènes d'Anguilliformes. SUMMARY. Monogeneans were obtained from the Eel, Anguilla anguilla from fresh water in southeastern France ; on the basis of adult morphology they were identified as Pseudodactylogyrus anguillae. The chaetotaxy, ciliated cells, excretory system and haptor of the oncomiracidium are described for the first time. The ultrastructure of the spermatozoon shows a single axoneme and no cortical microtubules. These data confirm the position of this species within the Dactylogyridea. The specific status of P. anguillae is discussed. A comparative morphological study of the postlarval development of the haptor in the Dactylogyridea lead us to propose the new family Pseudo dactylogyridae for these Monogeneans of Anguilliformes.

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Oncomiracidiums et phylogenèse des Monogenea (Plathelminthes)

Cited by 23 publications

References 30 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

North American freshwater ancyrocephalids (Monogenea) with articulating haptoral bars: phylogeny reconstruction

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

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