Two new species of short-snouted dogfish sharks of the genus Squalus Linnaeus, 1758, from southern Africa (Chondrichthyes: Squaliformes: Squalidae)

Viana, Sarah T. F. L.; Lisher, Mark W.; Carvalho, Marcelo R. de

doi:10.1007/s12526-017-0673-8

Cited by 9 publications

(9 citation statements)

References 15 publications

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“…Squalus bassi is distinguished from these species by a combination of characters of external morphology along with meristics and morphometrics as provided in the diagnosis above, which is in agreement with Last et al (2007c) for species described from the south-western Pacific Ocean and recent results of and Viana et al ( , 2017 for those from the South Atlantic and western Indian Oceans. This species differs from similar congeners regarding body and caudal fin colouration, concavity of pectoral-fin posterior margin and location of second dorsal fin related to pelvic fins, highlighting the morphological complexity on providing exclusive diagnostic characters for S. bassi.…”

Section: Discussionsupporting

confidence: 89%

“…between S. bassi, S. mitsukurii, S. lobularis and S. quasimodo), even when only adult specimens are considered in the case of S. bassi, S. mitsukurii and S. montalbani. These results go against those of Viana et al ( , 2017 for separating Squalus spp. of similar morphology, as the above-listed species, when considering stage of maturity for morphometric comparisons.…”

Section: Discussionmentioning

confidence: 52%

“…Other Squalus spp. that used to be recognized as of worldwide distribution have revealed to be more restricted to a particular region, including the shortnose spurdog Squalus megalops (Macleay 1881) (Last et al, 2007c;Naylor et al, 2012;Viana et al, , 2017Veríssimo et al, 2017) and S. blainvillei (Viana et al, , 2017Veríssimo et al, 2017). Joint efforts are imperative to corroborate this assumption and for clarifying the taxonomic status of S. mitsukurii by comparative examination of topotypic specimens and remaining similar forms recognized elsewhere, including those from Gulf of Mexico, Uruguay and Hawaii.…”

Section: Discussionmentioning

confidence: 99%

“…Synonyms for species indicate authorship, date, page and figures when possible. The comparative material listed in the Appendix is only of species that are more similar to the new species described herein; for specimens of other species examined, see Viana et al ( , 2017. Types and other examined material are deposited in scientific collections, whose institutional acronyms follow Sabaj (2016) Tables I-III. Long-snouted African spurdog (English); Langneus-penhaai (Afrikaans).…”

Section: Methodsmentioning

confidence: 99%

“…Validity of the latter two species, however, remains uncertain for this region. Additionally, two new short-snouted species, the Malagasy skinny spurdog Squalus mahia Viana, Lisher & Carvalho 2017 and the Smith's dogfish shark Squalus magaretsmithae Viana, Lisher & Carvalho 2017, were recently described from mostly southern African waters in Viana et al (2017).…”

Section: Introductionmentioning

confidence: 99%

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Squalus bassi sp. nov., a new long‐snouted spurdog (Chondrichthyes: Squaliformes: Squalidae) from the Agulhas Bank

Viana

Carvalho

Ebert

2017

Journal of Fish Biology

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The long-snouted African spurdog Squalus bassi sp. nov. is described based on material collected from the outer shelf and upper continental slope off South Africa and Mozambique. Squalus bassi shares with S. mitsukurii, S. montalbani, S. chloroculus, S. grahami, S. griffini, S. edmundsi, S. quasimodo and S. lobularis a large snout with prenarial length greater than distance between nostrils and upper labial furrows, dermal denticles tricuspidate and rhomboid and elevated number of vertebrae. Squalus bassi can be distinguished from all its congeners by a combination of body and fin colouration, external morphometrics, vertebral counts and shape of dermal denticles. Similar long-snouted congeners from the Indo-Pacific region, including S. montalbani, S. edmundsi and S. lalannei are compared in detail with the new species. This new species has been misidentified as the Japanese S. mitsukurii and the Mediterranean S. blainvillei due to the lack of comparative morphological analyses. The validity of the nominal species S. mitsukurii in the south-eastern Atlantic Ocean and western Indian Ocean is also clarified herein, indicating it has a more restricted geographical distribution in the North Pacific Ocean.

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Section: Discussionsupporting

confidence: 89%

Section: Discussionmentioning

confidence: 52%

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Squalus bassi sp. nov., a new long‐snouted spurdog (Chondrichthyes: Squaliformes: Squalidae) from the Agulhas Bank

Viana

Carvalho

Ebert

2017

Journal of Fish Biology

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Risks to biodiversity and coastal livelihoods from artisanal elasmobranch fisheries in a Least Developed Country: The Gambia (West Africa)

Moore¹,

Séret²,

Armstrong

2019

Biodivers Conserv

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M o o r e, Alec B.M., S é r e t , B e r n a r d a n d Ar m s t r o n g, Roy (2 0 1 9) Ris k s t o bio div e r si ty a n d c o a s t al liveli hoo d s fro m a r ti s a n al el a s m o b r a n c h fis h e ri e s in a L e a s t D ev elo p e d Co u n t ry: Th e G a m bi a (Wes t Afric a). Bio div e r si ty a n d Co n s e rv a tio n, 2 8 (6). p p. 1 4 3 1-1 4 5 0.Do w nlo a d e d fro m: h t t p://i n si g h t. c u m b ri a. a c. u k/i d/ e p ri n t/ 4 5 7 0/ U s a g e o f a n y i t e m s f r o m t h e U n i v e r s i t y o f C u m b r i a' s i n s t i t u t i o n a l r e p o s i t o r y 'I n s i g h t' m u s t c o n f o r m t o t h e f o l l o w i n g f a i r u s a g e g u i d e l i n e s .Any it e m a n d it s a s s o ci a t e d m e t a d a t a h el d in t h e U niv e r si ty of C u m b ri a 's in s ti t u tio n al r e p o si t o ry In si g h t (u nl e s s s t a t e d o t h e r wi s e o n t h e m e t a d a t a r e c o r d) m a y b e c o pi e d, di s pl ay e d o r p e rfo r m e d, a n d s t o r e d in lin e wi t h t h e JISC fai r d e ali n g g ui d eli n e s (av ail a bl e h e r e ) for e d u c a tio n al a n d n o t-fo r-p r ofit a c tiviti e s Abstract Developing nations in tropical regions harbour rich biological resources on which humans depend for food, income and employment, yet data to aid their management is often lacking. In West Africa, the diversity and isheries of elasmobranchs are poorly documented, despite them being known to be economically important and vulnerable to overexploitation. Rapid qualitative surveys of ish processing and landing sites in The Gambia from 2010-2018 revealed valuable new data on species composition, biology, relative abundance, isheries and utilisation by humans. Diversity and abundance was dominated by batoids, with a major component comprising a large guitarish (Glaucostegus cemiculus) that was apparently targeted, and a small whipray (Fontitrygon margaritella). Nearly all taxa recorded are classiied by the IUCN Red List as Critically Endangered (angel sharks Squatina spp.), Endangered, Data Deicient, or Not Evaluated; several were endemic, of exceptional evolutionary distinctness, cryptic, possibly undescribed, and rare (including stingray Hypanus rudis not apparently recorded since description in 1870). Signiicant threats to biodiversity, coastal livelihoods and possibly food security are identiied based on the apparent importance of elasmobranch isheries and processing; the known inability of key taxa to withstand intensive isheries; 'ishing down the food web' by intensive utilisation of F. margaritella; and the absence or rarity of previously common elasmobranch species that may be severely depleted in the region. This study provides data that may act as a starting point to aid sustainability accreditation of local in-isheries, and demonstrates the value of inexpensive and low-resolution data collection in developing countries.

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Re-evaluation of deep-sea dogfishes (genus Squalus) in Japan using phylogenetic inference

Ziadi-Künzli¹,

Soliman²,

Imai³

et al. 2020

Deep Sea Research Part I: Oceanographic Research Papers

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Two new species of short-snouted dogfish sharks of the genus Squalus Linnaeus, 1758, from southern Africa (Chondrichthyes: Squaliformes: Squalidae)

Cited by 9 publications

References 15 publications

Squalus bassi sp. nov., a new long‐snouted spurdog (Chondrichthyes: Squaliformes: Squalidae) from the Agulhas Bank

Squalus bassi sp. nov., a new long‐snouted spurdog (Chondrichthyes: Squaliformes: Squalidae) from the Agulhas Bank

Risks to biodiversity and coastal livelihoods from artisanal elasmobranch fisheries in a Least Developed Country: The Gambia (West Africa)

Re-evaluation of deep-sea dogfishes (genus Squalus) in Japan using phylogenetic inference

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