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Molecular and morphological evidence for close phylogenetic affinities of the genera Macrodera, Leptophallus, Metaleptophallus and Paralepoderma [Digenea, Plagiorchiata]

100%

Tkach V., Grabda-Kazubska B., Pawlowski J., Swiderski Z.

Acta Parasitologica

1999

tom 44

nr 3

Genera Paralepoderma, Leptophallus and Metaleptophallus have traditionally been classified as a group of closely related genera considered by most authors as members of the subfamily Leptophallinae, family Plagiorchiidae (Digenea, Plagiorchiata). At the same time the systematic position of the genus Macrodera was for a long time unstable and its phylogenetic affinities controversial. Different authors allocated this genus in the family Ochetosomatidae or as a type genus of separate family Macroderidae. The former three genera include parasites of snake digestive tract and the last one - parasites of snake lung. Some morphological features of adult and larval stages indicated, however, their possible close affinity. Molecular analysis based on the partial sequences of the 28S ribosomal DNA gene has demonstrated very close phylogenetic relationships between these four genera. The molecular data are supported by morphological characters of adult stages (first of all, presence of external seminal vesicles in all four genera), peculiarities of life cycle and chaetotaxy of cercariae. A hypothesis of the probable ways of speciation in this group is proposed.

Comparative chaetotaxy of five species of plagiorchiid cercariae, genera Leptophallus, Metaleptophallus, Macrodera and Paralepoderma

100%

Grabda-Kazubska B., Bayssade-Dufour C.

Acta Parasitologica

1999

tom 44

nr 4

The chaetotaxy of five species of plagiorchiid cercariae - Leptophallus nigrovenosus, Metaleptophallus gracillimus, Macrodera longicollis, Paralepoderma brumpti and P. progeneticum, is described and compared. A great similarity in the distribution of sensillae in all the species examined, especially in cephalic rings CI-IV, as well as in dorsal and ventral rows, suggests close affinities among these species. The variation in the pattern of chaetotaxy observed in P. brumpti and P. progeneticum (presence of 1-3 sensillae of the CI ring inside the oral cavity and numerous sensillae on the ventral sucker) seems to be connected with obligatory progenesis in the life cycle of these species.

Ograniczanie wyników

2 Acta Parasitologica

2 Grabda-Kazubska B.

1 Bayssade-Dufour C.

1 Pawlowski J.

1 Swiderski Z.

1 Tkach V.

2 1999

Wyniki wyszukiwania

Molecular and morphological evidence for close phylogenetic affinities of the genera Macrodera, Leptophallus, Metaleptophallus and Paralepoderma [Digenea, Plagiorchiata]

Comparative chaetotaxy of five species of plagiorchiid cercariae, genera Leptophallus, Metaleptophallus, Macrodera and Paralepoderma