First North Pacific records of the pointy nosed blue chimaera, Hydrolagus cf. trolli (Chondrichthyes: Chimaeriformes: Chimaeridae)

Reichert, Amber N.; Lundsten, Lonny; Ebert, David A.

doi:10.1186/s41200-016-0095-5

Cited by 7 publications

(2 citation statements)

References 13 publications

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“…It is likely that a population of undiscovered H. affinis in the tropical and/or southern Atlantic exist in the region between the two populations exhibiting a gradient of morphological characters exhibiting continued gene flow. Based on the genetic and morphological findings of this and other recent work (Reichert, Lundsten & Ebert, 2016) it appears this genus contains much wider ranging species than previously thought. New records and range extensions continue to expand our knowledge of chimaera distributions, indicating that some species once thought to be endemic or range restricted are much more widespread (Didier et al, 2012).…”

Section: Discussionsupporting

confidence: 60%

Taxonomic Revision of the Short Nose Chimaeras (Genus Hydrolagus) from the Southern African Region

Walovich¹

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TAXONOMIC REVISION OF THE SHORT NOSE CHIMAERAS (GENUS HYDROLAGUS) FROM THE SOUTHERN AFRICAN REGION by Kristin A. Walovich Short-nose chimaeras are an enigmatic and understudied group of deep-sea Chondrichthyan fishes. To resolve decades of confusion and misidentification in the southern African region, morphometric and genetic data were utilized to resolve taxonomic confusion for the genus Hydrolagus. Nearly 100 chimaeroid specimens were examined from numerous national and international museum ichthyology collections. A series of 96 measurements per specimen were recorded and analyzed with multivariate statistics to determine differences among species. Tissue was collected from various southern African species for analysis of the mitochondrial gene NADH2. The resulting genetic information was compared to morphologically similar species and those within the same geographical region. This study re-describes Hydrolagus africanus, officially describes a new species Hydrolagus erithacus sp. nov, identifies a species known as Hydrolagus cf. trolli as Hydrolagus affinis, and provides taxonomic clarification and detailed descriptions for all three species. The morphological and genetic differences between species of this genus are not pronounced, presenting challenges for identification and classification. Species clarification enables improved identification and fisheries statistics, informed management efforts, and the advancement of chimaera genetic and biological research. v Acknowledgements This thesis would not have been possible if not for the guidance and support from numerous people. Sincere thanks are owed to my three thesis advisors, Dr. David Ebert, whose immense knowledge of Chondrichthyans has helped save three more "Lost Sharks", Dr. Scott Hamilton, whose help extends back to my undergraduate days, and Dr. Kenneth Coale, for his unflagging support and insight. Thank you to Jenny Kemper (Medical University of South Carolina), whose work ethic, productivity and knowledge I strive to emulate. A special thanks goes to Rob Leslie (South African Department of Agriculture, Forestry and Fisheries) who has been instrumental to the success of my thesis. A number of people were very helpful during this research and I wish to extend a very appreciated thank you to Dominique Didier (Millersville University) and Douglas Long (Saint Mary's College) for their assistance on the Hydrolagus africanus paper, Gavin Naylor (College of Charleston, South Carolina), Mattias Lanas and Mark Dando who contributed their time and immense talent to draw the illustrations for my thesis, and to the staffs at the numerous museum collections and institutions I was privileged to visit

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Section: Discussionsupporting

confidence: 60%

Taxonomic Revision of the Short Nose Chimaeras (Genus Hydrolagus) from the Southern African Region

Walovich¹

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“…melanophasma : uniform dark‐brown to black body, first spine curved and longer than dorsal fin, long pectoral triangular fins, lateral line divided in canals on the head and a distinctive lighter band over the snout (Figure 1a; James et al ., 2009); H. cf. trolli : pointy snout and pointed triangular pectoral fins, keeled dorsal spines longer than dorsal fins and grey bluish coloration (Figure 1b; Reichert et al ., 2016). S. pacificus : lack of an anal fin, a short‐rounded snout, a cylindrical greyish body and low dorsal fins of similar height (Figure 1c,d; Compagno, 2001; Froese & Pauly, 2019); A. superciliosus : very large eyes and a deep horizontal groove above the gills, upper caudal fin lobe nearly as long as the rest of the body (Figure 1e; Compagno, 2001); A. brunneus : dark‐brown body, a broad flattened head with large nostrils and evident light posterior margins on spineless dorsal fins, short caudal peduncle and upper caudal lobe (Figure 1f; Compagno, 2001; Froese and Pauly, 2019); A. nasutus : brown body with pale posterior fin margins and a first dorsal fin slightly smaller than the second dorsal fin (Figure 1g; Compagno, 2001).…”

Section: Figurementioning

confidence: 99%

Sharks, rays, and chimaeras of the Revillagigedo National Park: An update of new and confirmed records

Becerril‐García

Hoyos-Padilla

Henning

et al. 2020

Journal of Fish Biology

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The Revillagigedo Archipelago National Park is the largest no-take Marine Protected Area in North America and it is essential for the conservation of globally endangered marine megafauna, including cetaceans, sea birds and cartilaginous fishes. The present paper reports the occurrence of 28 chondrichthyan species, including 19 sharks, seven batoids and two chimaeras in the Revillagigedo Archipelago, comprising eight new records and a brief revision of confirmed species to date. K E Y W O R D S biodiversity, chondrichthyes, conservation, deep sea, fisheries, marine park, MPA Marine Protected Areas (MPAs) have proved to be effective for the management of oceanic and coastal ecosystems (Lester et al., 2009).

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Redescription of the bigeye chimaera, Hydrolagus macrophthalmus de Buen, 1959 (Chondrichthyes: Chimaeriformes), with a genetic characterization of the species

et al. 2018

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First North Pacific records of the pointy nosed blue chimaera, Hydrolagus cf. trolli (Chondrichthyes: Chimaeriformes: Chimaeridae)

Cited by 7 publications

References 13 publications

Taxonomic Revision of the Short Nose Chimaeras (Genus Hydrolagus) from the Southern African Region

Taxonomic Revision of the Short Nose Chimaeras (Genus Hydrolagus) from the Southern African Region

Sharks, rays, and chimaeras of the Revillagigedo National Park: An update of new and confirmed records

Redescription of the bigeye chimaera, Hydrolagus macrophthalmus de Buen, 1959 (Chondrichthyes: Chimaeriformes), with a genetic characterization of the species

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