Editorial: The biodiversity of trematodes of fishes

Cribb, Thomas H.

doi:10.1007/s11230-016-9628-x

Cited by 11 publications

(10 citation statements)

References 22 publications

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“…In a special issue of the journal Systematic Parasitology (March 2016, Issue 3, pp. 219–306), distinguished trematodologists provided a comprehensive series of papers summarizing knowledge on the biodiversity of fish trematodes (Cribb, 2016). For marine species of Atlantic and eastern Pacific Oceans, Bray et al .…”

Section: Taxonomy and Systematics Of The Helminths Parasitic In Fish mentioning

confidence: 99%

Helminth parasites of South American fishes: current status and characterization as a model for studies of biodiversity

et al. 2016

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The South American subcontinent supports one of the world's most diverse and commercially very important ichthyofauna. In this context, the study of South American fish parasites is of increased relevance in understanding their key roles in ecosystems, regulating the abundance or density of host populations, stabilizing food webs and structuring host communities. It is hard to estimate the number of fish parasites in South America. The number of fish species studied for parasites is still low (less than 10%), although the total number of host-parasite associations (HPAs) found in the present study was 3971. Monogeneans, with 835 species (1123 HPAs, 28.5%), and trematodes, with 662 species (1127 HPAs, 30.9%), are the more diverse groups. Data gathered from the literature are useful to roughly estimate species richness of helminths from South American fish, even though there are some associated problems: the reliability of information depends on accurate species identification; the lack of knowledge about life cycles; the increasing number of discoveries of cryptic species and the geographically biased number of studies. Therefore, the closest true estimations of species diversity and distribution will rely on further studies combining both molecular and morphological approaches with ecological data such as host specificity, geographical distribution and life-cycle data. Research on biodiversity of fish parasites in South America is influenced by problems such as funding, taxonomic impediments and dispersion of research groups. Increasing collaboration, interchange and research networks in the context of globalization will enable a promising future for fish parasitology in South America.

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Section: Taxonomy and Systematics Of The Helminths Parasitic In Fish mentioning

confidence: 99%

Helminth parasites of South American fishes: current status and characterization as a model for studies of biodiversity

et al. 2016

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“…Similar patterns with respect to the scarcity of information on helminth parasites of wild animals, and especially in invertebrates, have been highlighted by Leung et al . (2015) and Cribb (2016).…”

Section: Discussionmentioning

confidence: 99%

“…It is not surprising that trematodes were the helminth group with the highest record of infection of both freshwater and marine–estuarine invertebrates in LAC, since this helminth group is considered the most diverse in vertebrate hosts from aquatic environments on a global scale (Cribb, 2016). Trematodes use invertebrates as first intermediate host (gastropods, bivalves and polychaetes), and any other invertebrate can be a second intermediate host where metacercariae can be found.…”

Section: Who Is There?mentioning

confidence: 99%

Diversity of helminth parasites in aquatic invertebrate hosts in Latin America: how much do we know?

et al. 2016

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Helminths in aquatic invertebrate hosts have been overlooked in comparison with vertebrate hosts. Therefore, the known diversity, ecology and distribution of these host-parasite systems are very limited in terms of their taxonomic diversity, habitat and geographic regions. In this study we examined the published literature on helminth parasites of aquatic invertebrates from Latin America and the Caribbean (LAC) to identify the state of the knowledge in the region and to identify patterns of helminth diversity. Results showed that 67% of the literature is from Argentina, Mexico and Brazil. We found records for 772 host-parasite associations. Most records relate to medically or economically important hosts. Molluscs were the most studied host group with 377 helminth records (80% trematodes). The lymnaeids and planorbids were the most studied molluscs across LAC. Arthropods were the second most studied host group with 78 helminth records (trematodes 38%, cestodes 24% and nematodes 20%), with shrimps and crabs being the most studied hosts. Host species with the largest number of helminth taxa were those with a larger sampling effort through time, usually in a small country region. No large geographical-scale studies were identified. In general, the knowledge is still too scarce to allow any zoogeographical or helminth diversity generalization, as most hosts have been studied locally and the studies on invertebrate hosts in LAC are substantially uneven among countries.

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“…Recently, molecular data have become essential for matching different stages of digenean life-cycles (Cribb, 2016; Faltýnková et al, 2016). The cercariae of lissorchiid species develop within rediae in different gastropods (pulmonates and prosobranchs) and are of a non-oculate cercariaeum type, characterized by lack of tail (tailless), that usually encyst in gastropods.…”

Section: Introductionmentioning

confidence: 99%

Diversity of European lissorchiid trematodes from fish and snail hosts with comments on the validity of the genus Parasymphylodora Szidat, 1943

Petkevičiūtė

Stunžėnas²,

Stanevičiūtė³

2022

J. Helminthol.

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Genetic markers, DNA sequences and karyotypes, of some European lissorchiid species from their intermediate and final hosts were obtained to clarify controversial data about their life cycles and taxonomy, and to reveal phylogenetic affinities. The life cycles of three species have been confirmed for the first time based on molecular data. Comparative analysis of internal transcribed spacer 2 (ITS2) and partial 28S rDNA sequences has undoubtedly proven that cercariaeum of type-species of the genus Asymphylodora, Asymphylodora tincae, develops in pulmonate snails, Anisus vortex and Stagnicola palustris, but not in the genus Bithynia. The faucet snail, Bithynia tentaculata, serves as the first intermediate host for Parasymphylodora (=Asymphylodora) markewitschi and Parasymphylodora parasquamosa; adults of both species were isolated from the common rudd, Scardinius erythrophthalmus. It has also been confirmed that B. tentaculata serves as the second intermediate host for P. parasquamosa. Phylogenetic analysis supports the validity of the genus Parasymphylodora. Two species, Parasymphylodora markewitschi and P. parasquamosa, with cercariaeum belonging to the Parasquamosum group, are closely related and are being recovered as a well-defined evolutionary lineage in phylogenetic trees. A significant divergence between Parasymphylodora spp. and Asymphylodora spp. was revealed. The diploid chromosome set of P. markewitschi is composed of 14 chromosomes and does not show similarities with karyotypes of other lissorchiid species. Asymphylodora progenetica and Asymphylodora tincae share the basal diploid value of the family, 2n = 20, and reveal very close morphology of the corresponding chromosome pairs. Karyotypic similarities of these species are in accordance with molecular phylogenetic data. Thus, the available molecular and cytogenetic data support the assignment of P. markewitschi and P. parasquamosa to a separate genus, meanwhile, the assignment of A. progenetica to the genus Parasymphylodora was not justified.

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Editorial: The biodiversity of trematodes of fishes

Cited by 11 publications

References 22 publications

Helminth parasites of South American fishes: current status and characterization as a model for studies of biodiversity

Helminth parasites of South American fishes: current status and characterization as a model for studies of biodiversity

Diversity of helminth parasites in aquatic invertebrate hosts in Latin America: how much do we know?

Diversity of European lissorchiid trematodes from fish and snail hosts with comments on the validity of the genus Parasymphylodora Szidat, 1943

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