A new Amphistome cercaria from<i>Lymnaea truncatula</i>in Europe

Odening, K.; Samnaliev, P.

doi:10.1051/parasite/1987622117

Cited by 3 publications

(4 citation statements)

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“…The identity of E. revolutum and E. audyi was confirmed in different comparative experimental studies on materials from Europe and Asia, including Germany and Malaysia, where E. revolutum and E. audyi were originally described (Lie & Kanev, 1983;Dimitrov et al, 1985;Kanev, 1985). The results obtained, that E. audyi corresponded completely with E. revolutum in both the adult and larval morphology and biology, were supported by Odening (1986), Dimitrov (1987), Christensen et al (1990) and Huffman & Fried (1990).…”

Section: Species Now Considered Identical To Echinostoma Revolutumsupporting

confidence: 68%

“…I consider E. echinatum a valid species because its adults and larvae differ from E. revolutum in: its use of mammals including man as definitive hosts; its use of planorbid snails as its first intermediate host; the number and arrangement of protein fraction of homogenates of adult worms; the cirrus surface and shape; the number and position of penetration glandcells opening on the ventral surface of the dorsal lip of oral sucker (6); the number and position of para-oesphageal glands-cell pores (total number 60-64, 14-16 being located on the oral sucker and 36-42 on the body); the number and arrangement of argentophilic structures; and chromosome morphology. The validity of E. echinatum was supported by Odening (1986), Schuster (1986), Dimitrov (1987), Christensen et al (1990 and Huffman & Fried (1990).…”

Section: Closely Related Species In Europementioning

confidence: 74%

“…Kanev (1985) recognised E. revolutum of Beaver (1937) as an independent species, now known as E. trivolvis (Cort, 1914) based on its original name. This identity of E. trivolvis is based on comparative studies of material from Europe and the USA (Kanev & Fried, 1982;Kanev, 1985;Vassilev et al, 1984) and has been confirmed by Odening (1986), Christensen et al (1990 and Huffman & Fried (1990). E. trivolvis, differs from E. revolutum in its: (i) first intermediate planorbid snail host; (ii) use of mammals as final host; (iii) number and arrangement of protein fractions in the homogenates of adult worms; (iv) number and distribution of argentophilic structures; (v) number of penetration gland-cell ducts on the ventral surface of the dorsal lip of the oral sucker (6); (vi) number and position of para-oesphageal gland-cells ducts (total number 4-6, all on oral sucker); and (vii) geographical distribution (North America).…”

Section: Invalid Descriptions Of Echinostoma Revolutummentioning

confidence: 99%

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Life-cycle, delimitation and redescription of Echinostoma revolutum (Froelich, 1802) (Trematoda: Echinostomatidae)

1994

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The life-cycle of Echinostoma revolutum (Froelich, 1802) Dietz, 1909 has been completed experimentally beginning with infected snails collected at the type-locality, near Erlangen, Germany. Based on the specimens obtained, each stage of the life-cycle has been redescribed. Important taxonomic features are discussed and hitherto unknown characteristics are described. Synonyms for E. revolutum are: Fasciola revoluta Froelich, 1802; Echinostoma paraulum Dietz, 1909; E. audyi Lie & Umathevy, 1965; and E. ivaniosi Mohandas, 1973. Adults and larvae described as E. revolutum in other works are found to be identical with Echinostoma echinatum (Zeder, 1803), E. trivolvis (Cort, 1914), E. jurini (Skvortsov, 1924), E. caproni Richard, 1964, Moliniella anceps (Molin, 1859), Echinochasmus beleocephalus (Linstow, 1873) and other echinostome species. For nearly a century, incorrect morphological, biological, life-cycle and host information has been attributed to E. revolutum, and at times these data have contributed to the diagnoses of the species. Occasionally, authors actually working with E. revolutum have ascribed their results to other species. Based on extensive experimental life-cycle studies beginning with infected snails from type-localities, it is shown that (1) the first intermediate host is a lymnaeid snail; (2) the second intermediate hosts are various pulmonate and prosobranch snails, mussels, frogs and freshwater turtles; (3) the final hosts are birds; (4) E. revolutum cercariae and adults have 37 collar spines; (5) the species occurs only in Europe and Asia; (6) Cercaria echinata Siebold, 1937, Echinostoma echinatum (Zeder, 1803) and E. jurini (Skvortsov, 1924 are the closely related 37-spined allies in Europe; and (7) species specific characteristics are expressed only in the larvae and the host-parasite relationships. The adults of E. revolutum cannot be identified using morphological criteria and it is proposed that worms with 37 collar spines belonging to the genus Echinostoma and occurring in naturally infected birds in Europe and Asia be referred to an "E. revolutum group."

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Section: Species Now Considered Identical To Echinostoma Revolutumsupporting

confidence: 68%

Section: Closely Related Species In Europementioning

confidence: 74%

Section: Invalid Descriptions Of Echinostoma Revolutummentioning

confidence: 99%

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Life-cycle, delimitation and redescription of Echinostoma revolutum (Froelich, 1802) (Trematoda: Echinostomatidae)

1994

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“…in France (Hourdin et al, 1991); Echinostoma revolutum and Hypoderaeum conoideum in Ukraine (Skovronskii, 1985); Haplometra cylindracea in Russia (Budalova, 1986); a species of Plagiorchiidae and Notocotylus neyrai in Spain (Simon-Vicente & Ramajo-Martin, 1978;Simon-Vicente, 1979;Simon-Vicente et al, 1985); Cercaria truncatuloides n.sp. {Paramphistomum) in the German Democratic Republic (Odening & Samnaliev, 1987).…”

Section: Introductionmentioning

confidence: 99%

Lymnaea truncatula, intermediate host of some Plagiorchiidae and Notocotylidae species in León, NW Spain

1994

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To study the distribution of Lymnaea truncatula in the Porma river basin (León, NW Spain) and its helminth fauna, malacological samplings were carried out at 66 points in the basin and the presence of these molluscs was detected in 31. To trace the dynamics of this mollusc population and the prevalence and intensity of its infection by trematodes, malacological samplings were made at fortnightly intervals over two years at five locations, situated in the upper and middle regions of the river Porma basin. To confirm the identity of the larval stages found in the molluscs, second intermediate and/or definitive hosts, depending on the trematode species, were experimentally infected to complete the life cycles. Two different species of Plagiorchiidae and one of Notocotylidae were identified. The infection prevalence of Plagiorchis elegans for the 6291 specimens of L. truncatula examined was 2.8% and infection was observed in snails collected in 7 of the 31 sample localities. This parasite was found in all months of the year, with the highest prevalence observed in July and October. When the corrected frequency values were considered, a slightly positive relationship was observed between the infection prevalence and the latter months. The highest percentages of snails harbouring immature sporocysts were detected in March and June–July, while the highest percentages with sporocysts containing mature cercariae were observed in spring and at the end of summer–autumn, and cercarial shedding in the latter. Of the 6291 L. truncatula examined 0.3% were infected by sporocysts of Opisthioglyphe ranae. The infection was detected in only one locality, in four months of the year, with the highest prevalence in May. Notocotylus neyrai was found in 2.6% of the 6291 mollusc specimens checked and was collected from 12 of the 31 localities. The highest prevalence was observed in October, April and July and the corrected frequency values reveal a positive relationship between the infection prevalence and those three months. The highest percentage of molluscs harbouring rediae of N. neyrai with germinal mass was found in April and September–October. On the other hand, rediae with mature cercariae were present in almost every month, but we only observed cercarial shedding in October and March. The L. truncatula infection prevalence by P. elegans, O. ranae and N. neyrai increased with the size of the molluscs. Double infection was only observed in four snails: one harboured O. ranae and N. neyrai and three F. hepatica and P. elegans.

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Emergence of New Snail Species and Cercariae on Jakara Dam

Duwa¹

2017

IOSRJPBS

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Fresh water snails in Jakara dam were investigated for different types of cercariae. Snails were collected from different parts of the dam in Minjibir, Ugoggo and Gezawa local government area between October 2016 and January 2017 by hand picking only and placed separately in compartmented petridishes for cercarial shedding. Result showed that twenty one snail species from two families comprising Lymnaeidae and Planorbidae were encountered. Bulinus species collected are B. globosus morelet, B. reticulatus, B. truncatus rohlfsi, B truncatus truncatus Egypt, B jousseammei, B. succinoides and B. camerunensis. Fourteen species of Lymnea were encountered from different parts of the dam. Lymnea species encountered are Peplimnea affinus ((Küster,1862), Lymnea (Pseudosuccina) columella, L. natalensis, Lymnaea ollula, L. tormentosa, L.auricularis rubiginosa with one of them shedding more than a hundred cercariae. Most of these lymnea species cannot be identified or named. Twelve different types of cercaria were discovered but only nine of them were presumably identified as Virgulate, Ubiquita, Gymnocephalus, Amphistome, Echinostome, Armatae cercaria, Parapleurolophocercous cercariae, Ornatae and Fucocercus cercaria (videos of swimming available), three of them cannot be identified. Lymnea species from Bangare showed the most infection with one of them shedding more than a hundred cercariae. There was no schistosome cercariae. This is the first time more than three types of cercariae were observed in Jakara dam. Data analysis was done descriptively. The presence of these new types of cercariae may not be unconnected with the presence of different species of Lymnea encountered in the water body and may mean a new trend in trematode infection.

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A new Amphistome cercaria fromLymnaea truncatulain Europe

Cited by 3 publications

References 0 publications

Life-cycle, delimitation and redescription of Echinostoma revolutum (Froelich, 1802) (Trematoda: Echinostomatidae)

Life-cycle, delimitation and redescription of Echinostoma revolutum (Froelich, 1802) (Trematoda: Echinostomatidae)

Lymnaea truncatula, intermediate host of some Plagiorchiidae and Notocotylidae species in León, NW Spain

Emergence of New Snail Species and Cercariae on Jakara Dam

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