Abstract
Species of Acanthobothrium have been documented as parasites of the spiral intestine of elasmobranchs. Results of a metadata analysis indicate that 114 species of elasmobranchs have been reported as hosts of 200 species of Acanthobothrium. The metadata analysis revealed that 3.7% of species of sharks and 14.9% of species of rays that have been reported as hosts to date; some species are parasitized by more than one species of Acanthobothrium. This work provides a Category designation, as proposed by Ghoshroy and Caira (2001), for each species of Acanthobothrium. These Category designations are a tool to facilitate comparisons among members of Acanthobothrium for descriptions of new species in the future.
Highlights
According to Last et al (2016b), there are 34 families comprised of 516 valid species of sharks and 26 families that include 633 valid species of rays
Six new species of sharks and rays were described by: Yokota and Carvalho (2017), Vaz and Carvalho (2018), Rutledge (2019), Grace et al (2019) and Concha et al (2019). This brought the current number of recognized species to 517 species of sharks and 637 species of rays
637 species of rays have been described with 14.9% (95 of the 637 species) have been reported as hosts for species of Acanthobothrium (Fig. 3C)
Summary
According to Last et al (2016b), there are 34 families comprised of 516 valid species of sharks and 26 families that include 633 valid species of rays. Six new species of sharks and rays were described by: Yokota and Carvalho (2017) (two species of rays), Vaz and Carvalho (2018) (one species of shark), Rutledge (2019) (one species of ray), Grace et al (2019) (one species of shark) and Concha et al (2019) (one species of ray) This brought the current number of recognized species to 517 species of sharks and 637 species of rays. Elasmobranchs (sharks, skates and rays) are host to a great variety of parasites in nature, helminths. Acanthobothrium Blanchard, 1848 (Onchoproteocephalidea) is the most diverse genus that has been reported as parasite of the spiral intestine of elasmobranchs (Caira and Jensen 2017). The genus Acanthobothrium is an excellent model for future studies of hostparasite co-speciation
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