Chétotaxie cercarienne d’Echinostoma revolutum(Froelich, 1802) etE. echinatum(Zeder, 1803) (Trematoda, Echinostomatidae)

Echinostoma echinatum (Zeder 1803) sensu Kanev (Digenea: Echinostomatidae): a note of caution

“…echinatum ?". toma echinatum (Zeder, 1803) and Echinostoma sp., as described by Kanev et al (1987). The adults of the latter species had been identified as E. echinaturn by Kanev (1985).…”

“…In a series of valuable contributions on this group, Dr I. Kanev and his co-authors (see Kanev, 1985;Kanev et al, 1987;Kanev (1994), and references therein) have clarified the situation in several areas. However, during the course of studies on the digenean communities in the brackish water lake of Durankulak on the Bulgarian Black Sea coast, the snail Planorbis planorbis was found to be naturally infected with larval stages of an echinostome digenean of the genus Echinostoma Rudolphi, 1809.…”

“…Its lifecycle was completed in the laboratory and the morphological variability of both the larval stages and adults obtained experimentally was studied (Kostadinova et al, in preparation). A comparison of the patterns of cercarial chaetotaxy with three Palaearctic members of the 'revolutum' group of echinostomes I (Kanev et al, 1987) indicated similarities with both Echinos-I Echinostoma revolutum (FrOlich, 1802) sensu Kanev (1985). E. echinatum (Zeder, 1803) and "Ectu'nostoma sp.…”

“…Although the above authors had stated that 'Les adultes de ces t.~,chinostomes ne pr6sentent aucune diff6rence morphologique pr6cise', I have examined maritae obtained in their experimental study in order to compare it with our material. The aim of this paper is to present some aspects of the results of my re-examination of the material identified by Kanev et al (1987) as E. echinatum.…”

“…

The re-examination of the voucher specimens identified by Kanev et al (1987) as E. echinatum (Zeder, 1803) showed that two distinct species have been considered as E. echinatum: E. sarcinum Dietz, 1909, possessing 47 collar spines [Lymnaea truncatula strain -set 'L' (No. 326 TB)] and Echinostoma sp.

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