Three new species of 'tetraphyllidean' cestodes from an undescribed bamboo shark (Orectolobiformes: Hemiscylliidae) in Sri Lanka

Caira, Janine N.; Otto, Kyle; Fernando, Daniel; Jensen, Kirsten

doi:10.14411/fp.2021.004

Cited by 2 publications

(1 citation statement)

References 14 publications

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“…Based on their molecular phylogenetic analyses, elevated the family Phyllobothriidae to ordinal status. Caira et al (2021aCaira et al ( , 2021b provided the most comprehensive phylogenetic analysis of this order; their dataset included species from 15 of the 18 genera, as well as 3 new genera. Members of the order have simple, undivided bothridia, each bearing an apical sucker.…”

Section: Polyzoic Acetabulate Groupsmentioning

confidence: 99%

Fish tapeworms (Cestoda) in the molecular era: achievements, gaps and prospects

Scholz

Kuchta

2022

Parasitology

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The tapeworms of fishes (Chondrichthyes and Actinopterygii) account one-third (1670 from around 5000) of the total tapeworm (Platyhelminthes: Cestoda) species diversity. In total 1186 species from 9 orders occur as adults in elasmobranchs (sharks, rays and chimaeras), and 484 species from 8 orders mature in ray-finned fishes (referred to here as teleosts). Teleost tapeworms are dominated by freshwater species (78%), but only 3% of elasmobranch tapeworms are known from freshwater rays of South America and Asia (Borneo). In the last 2 decades, vast progress has been made in understanding species diversity, host associations and interrelationships among fish tapeworms. In total, 172 new species have been described since 2017 (149 from elasmobranchs and 23 from teleosts; invalidly described taxa are not included, especially those from the Oriental region). Molecular data, however, largely limited to a few molecular markers (mainly 28S rDNA, but also 18S and cox1), are available for about 40% of fish tapeworm species. They allowed us to significantly improve our understanding of their interrelationships, including proposals of a new, more natural classification at the higher-taxonomy level (orders and families) as well as at the lower-taxonomy level (genera). In this review, we summarize the main advances and provide perspectives for future research.

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Section: Polyzoic Acetabulate Groupsmentioning

confidence: 99%

Fish tapeworms (Cestoda) in the molecular era: achievements, gaps and prospects

Scholz

Kuchta

2022

Parasitology

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Diversity and phylogenetic relationships of 'tetraphyllidean' Clade 3 (Cestoda) based on new material from orectolobiform sharks in Australia and Taiwan

Caira¹,

Jensen²

2022

FOLIA PARASIT

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In an effort to expand knowledge of Clade 3-one of the ten clades that compose the non-monophyletic order 'Tetraphyllidea' all current members of which parasitise orectolobiform sharks-we targeted species of orectolobiform sharks that had not previously been examined for 'tetraphyllidean' cestodes. That work led to the discovery of three new species off Australia and Taiwan. Ambitalveolus gen. n. was erected to accommodate these species. Ambitalveolus costelloae gen. n. et sp. n., Ambitalveolus kempi sp. n., and Ambitalveolus penghuensis sp. n. differ from one another in scolex size, genital pore position, and number of marginal loculi, proglottids, and testes. Among 'tetraphyllideans', the new genus most closely resembles the two other genera in Clade 3. It differs from Carpobothrium Shipley et Hornell, 1906 in lacking anterior and posterior flap-like extensions of its bothridia; instead, its bothridia are essentially circular. It differs from Caulopatera Cutmore, Bennett et Cribb, 2010 in that its vitelline follicles are in two lateral bands, rather than circum-medullary, and in that its bothridia bear, rather than lack, conspicuous marginal loculi. A key to the three genera in Clade 3 is provided. A phylogenetic analysis including new sequence data for one of the three new species of Ambitalveolus gen. n., the only species of Caulopatera, and all four described species and one undescribed species of Carpobothrium supports previously hypothesised close affinities between Caulopatera and Carpobothrium, with the new genus as their sister group. This is the first report of 'tetraphyllidean' cestodes from the orectolobiform shark family Brachaeluridae Applegate. The association of the new species with orectolobiform sharks is consistent with those of the other members of Clade 3. However, whereas species of Carpobothrium and Caulopatera parasitise members of the hemiscylliid genus Chiloscyllium Müller et Henle, species of Amitalveolus gen. n. parasitise members of the Brachaeluridae and Orectolobidae Gill.

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Three new species of 'tetraphyllidean' cestodes from an undescribed bamboo shark (Orectolobiformes: Hemiscylliidae) in Sri Lanka

Abstract: Examination of seven specimens of an undescribed species of bamboo shark (Orectolobiformes: Hemiscylliidae), currently referred to as Chiloscyllium sp. 1, from Sri Lanka yielded three new species of 'tetraphyllidean' cestodes, one each in the genera Car

Cited by 2 publications

References 14 publications

Fish tapeworms (Cestoda) in the molecular era: achievements, gaps and prospects

Fish tapeworms (Cestoda) in the molecular era: achievements, gaps and prospects

Diversity and phylogenetic relationships of 'tetraphyllidean' Clade 3 (Cestoda) based on new material from orectolobiform sharks in Australia and Taiwan

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