The Lymnæidæ of North and Middle America, recent and fossil

Baker, Frank Collins

doi:10.5962/bhl.title.20500

Cited by 24 publications

(16 citation statements)

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“…This strongly suggests that America is where G. truncatula originated. This is consistent with its detection in Alaska and the Yukon territory [50]. It is possible the current distribution of G. truncatula in North America is broader, but has remained cryptic because it has been confounded with other taxa.…”

Section: Discussionsupporting

confidence: 83%

“…Our study is the first to include L. diaphana in a phylogenetic analysis and suggests that this species is sister to the North American Stagnicola and L. occulta (= C. occulta ) (clade C1a), although with low support (0.54 BP and 0.71 PP). Baker [50] reported L. diaphana in South Dakota, consistent with a possible North American origin. However, the species was originally described from southern South America (Strait of Magellan, Chile; [51]) and is currently found in Argentina, Brazil, Chile, Peru and Uruguay.…”

Section: Discussionmentioning

confidence: 91%

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Bridging gaps in the molecular phylogeny of the Lymnaeidae (Gastropoda: Pulmonata), vectors of Fascioliasis

et al. 2010

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BackgroundLymnaeidae snails play a prominent role in the transmission of helminths, mainly trematodes of medical and veterinary importance (e.g., Fasciola liver flukes). As this family exhibits a great diversity in shell morphology but extremely homogeneous anatomical traits, the systematics of Lymnaeidae has long been controversial. Using the most complete dataset to date, we examined phylogenetic relationships among 50 taxa of this family using a supermatrix approach (concatenation of the 16 S, ITS-1 and ITS-2 genes, representing 5054 base pairs) involving both Maximum Likelihood and Bayesian Inference.ResultsOur phylogenetic analysis demonstrates the existence of three deep clades of Lymnaeidae representing the main geographic origin of species (America, Eurasia and the Indo-Pacific region). This phylogeny allowed us to discuss on potential biological invasions and map important characters, such as, the susceptibility to infection by Fasciola hepatica and F. gigantica, and the haploid number of chromosomes (n). We found that intermediate hosts of F. gigantica cluster within one deep clade, while intermediate hosts of F. hepatica are widely spread across the phylogeny. In addition, chromosome number seems to have evolved from n = 18 to n = 17 and n = 16.ConclusionOur study contributes to deepen our understanding of Lymnaeidae phylogeny by both sampling at worldwide scale and combining information from various genes (supermatrix approach). This phylogeny provides insights into the evolutionary relationships among genera and species and demonstrates that the nomenclature of most genera in the Lymnaeidae does not reflect evolutionary relationships. This study highlights the importance of performing basic studies in systematics to guide epidemiological control programs.

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Section: Discussionsupporting

confidence: 83%

Section: Discussionmentioning

confidence: 91%

Bridging gaps in the molecular phylogeny of the Lymnaeidae (Gastropoda: Pulmonata), vectors of Fascioliasis

et al. 2010

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“…are not closely related. A previous biochemical study (Burch and Lindsay 1972) also contradicted Baker's (1911) suggestion. These findings clearly indicate that taxonomic conclusions based on radular dentition alone are misleading.…”

Section: Resultsmentioning

confidence: 47%

“…This feature was used by Baker (1911) to suggest a close association between Fossaria and Stagnicola s.str. This view is not supported by the 16S data, as all analyses showed that the species of Fossaria and members of Stagnicola s.str.…”

Section: Resultsmentioning

confidence: 99%

Molecular phylogenetic relationships in the aquatic snail genus Lymnaea , the intermediate host of the causative agent of fascioliasis: insights from broader taxon sampling

2002

Parasitology Research

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Phylogenetic analyses were performed on partial mitochondrial (16S) gene sequences that included new 16S data for 23 exemplars of the freshwater pulmonate snail genus Lymnaea sensu lato and putative outgroup species. This procedure yielded relatively congruent patterns of evolutionary divergence and phylogenetic affinities, and greater resolution and support for many lineages at different levels of divergence than from a previous work based on fewer samples. It has also clarified the relationships between key taxa. Molecular differentiation was evident among genera. Lymnaeids with n=16 chromosomes are a distinct, well-supported monophyletic group of recent origin. The genus Radix appears to be paraphyletic. Among the indigenous North American lymnaeids, a closer alliance was found between Fossaria spp. and Stagnicola caperata, a member of the subgenus Hinkleyia, than between the latter species and members of the subgenus Stagnicola s.str. The North American population of Lymnaea stagnalis is likely to be of European origin as it clustered with its European counterparts. The relevance of the molecular findings to efforts aimed at controlling snail-transmitted trematode diseases is discussed.

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“…2003a,b). Family Lymnaeidae is distributed over North America from the Arctic Ocean to the Isthmus of Panama (Baker 1911; Dunkel et al. 1996 see Table1).…”

Section: Spectrum Of Intermediate Hostsmentioning

confidence: 99%

Life history and biology of Fascioloides magna (Trematoda) and its native and exotic hosts

Malcicka

2015

Ecology and Evolution

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Host–parasite interactions are model systems in a wide range of ecological and evolutionary fields and may be utilized for testing numerous theories and hypotheses in terms of both applied and fundamental research. For instance, they are important in terms of studying coevolutionary arms races, species invasions, and in economic terms the health of livestock and humans. Here, I present a comprehensive description of the life history, biogeography, and biology of the giant liver fluke, Fascioloides magna, and both its intermediate and definitive hosts. F. magna is native to North America where it uses several species of freshwater snails (Lymnaeidae) as intermediate hosts and four main species of ungulates as definitive hosts. The fluke has also been introduced into parts of Europe where it is now established in two lymnaeid snail species and three ungulate species. This study gives a comprehensive description of different developmental stages of the fluke in its two host classes, as well as detailed notes on historical and present distributions of F. magna in North America and Europe as well as in its snail and deer hosts (with range maps provided). Aberrant and dead-end hosts are also discussed in detail, and descriptive phylogenies are provided for all of the organisms. I briefly discuss how F. magna represents a model example of multiple-level ecological fitting, a phenomenon not yet described in the empirical literature. Lastly, I explore possible future scenarios for fluke invasion in Europe, where it is currently expanding its range.

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The Lymnæidæ of North and Middle America, recent and fossil

Cited by 24 publications

References 0 publications

Bridging gaps in the molecular phylogeny of the Lymnaeidae (Gastropoda: Pulmonata), vectors of Fascioliasis

Bridging gaps in the molecular phylogeny of the Lymnaeidae (Gastropoda: Pulmonata), vectors of Fascioliasis

Molecular phylogenetic relationships in the aquatic snail genus Lymnaea , the intermediate host of the causative agent of fascioliasis: insights from broader taxon sampling

Life history and biology of Fascioloides magna (Trematoda) and its native and exotic hosts

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