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Diagnostic Description

provided by Fishbase
This species can be distinguished from its congeners through the following set of characters: body which is conspicuously robust and humped dorsally; second dorsal fin is upright and markedly tall (height 4.0%, 4.7%-5.3% TL); first and second dorsal-fin spines are elongated (first dorsal-fin spine length 4.3%, 3.3%-4.3% TL and second dorsal-fin spine length 4.4%, 3.9%-4.3% TL), and broad at base (first spine base length 0.9%, 0.7%-1.0% TL; second spine base length 1.0%, 0.8%-0.9% TL); caudal fin have a conspicuous rectangular dorsal lobe; the dermal denticles are tricuspid, markedly imbricate and broad at crown; differs from S. bahiensis by having a larger pectoral-fin anterior margin length, 15.9%, 15.5%-16.0% TL (vs. 14.3%, 14.4%-14.5% TL) and more elongate first dorsal-fin spine, its length 4.3%, 3.3%-4.3% TL (vs. 2.8%, 2.9%-3.0% TL), has a larger first dorsal fin with greater anterior margin length, 11.2%, 10.8%-11.4% TL (vs. 10.5%, 10.3%-10.6% TL) and fin base (length 8.2%, 7.7%-8.5% TL vs. 7.5%, 7.2%-7.3% TL, respectively); differs from S. lobularis by having a greater interdorsal distance, 26.4%, 24.0%-25.8% TL (vs. 22.3%, 21.9%-23.6% TL) (Ref. 109601).
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Estelita Emily Capuli
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Morphology

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Vertebrae: 116 - 121
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Humpback western dogfish

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The humpback western dogfish (Squalus quasimodo) is a dogfish described in 2016. It is a member of the family Squalidae, found off the coast of Brazil. The length of the longest specimen measured is 85.0 cm (33.5 in).This shark got its scientific name from the hump on its back like the fictitious hunchback of Notre Dame, Quasimodo.[1]

References

  1. ^ Froese, Rainer; Pauly, Daniel (eds.) (2016). "Squalus Quasimodo" in FishBase. 10 2016 version.
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Humpback western dogfish: Brief Summary

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The humpback western dogfish (Squalus quasimodo) is a dogfish described in 2016. It is a member of the family Squalidae, found off the coast of Brazil. The length of the longest specimen measured is 85.0 cm (33.5 in).This shark got its scientific name from the hump on its back like the fictitious hunchback of Notre Dame, Quasimodo.

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