A new species of the rare deep-sea genus Sciadonus Garman, 1899 (Teleostei, Bythitidae) from off Brazil, with a discussion of the evolution of troglomorphism and miniaturization in the aphyonid clade
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A new species of the rare, deep-sea genus Sciadonus Garman, 1899 (Bythitidae) is described based on two specimens obtained by the Brazilian R/V Alpha Crucis on the continental slope off São Paulo State, Southeastern Brazil, western South Atlantic. It differs from its congeners by the combination of the following characters: body pale lacking dark pigmentation except for on female claspers; a pair of dermal tissue flaps anteriorly on lower jaw; pelvic-fin rays present; precaudal vertebrae 39 or 40 and total vertebrae 74 or 75. The key to the species of Sciadonus is updated. A discussion of the presence and differentiation between troglomorphic and miniature characteristics among the species in the aphyonid clade is provided and compared with other bythitids.
| Originalsprog | Engelsk |
|---|---|
| Artikelnummer | 103684 |
| Tidsskrift | Deep-Sea Research Part I: Oceanographic Research Papers |
| Vol/bind | 180 |
| Antal sider | 8 |
| ISSN | 0967-0637 |
| DOI | |
| Status | Udgivet - 2022 |
Bibliografisk note
Funding Information:
We would like to thank Michel D. Gianetti, Osvaldo T. Oyakawa, Alessio Datovo, and Mario C. C. de Pinna (MZUSP) for curatorial assistance; Renato Contessotto (Laborat?rio de Caracteriza??o Tecnol?gica, Escola Polit?cnica da USP) for the radiographs; Denise Bjornoy, Patric Belen and Andrew Stradling (MARPORT) for the fishing sensors, Werner Schwarzhans (University of Copenhagen) and an anonymous reviewer for suggestions. MRMS and AAG are deeply indebted to the crew of the R/V Alpha Crucis under the commandment of Jos? Rezende; to Ivoneide E. Gattei and J. Gustavo Imakawa (IO-USP) for the logistic management; and Fl?via T. Masumoto, Heloisa C. Caixeta, Mayza Pompeu, Nathalie A. Fernandes, Rayane S. de Fran?a (IO-USP), Rodrigo A. Caires (MZUSP) and Polyana Roque (UFRPE) for the field assistance during the DEEP-OCEAN project expeditions. Funding was provided to MRSM by Funda??o de Amparo ? Pesquisa do Estado de S?o Paulo (FAPESP 2017/12909?4), and AAG receives a PhD fellowship from the Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico (CNPq 159146/2018?6). This article is registered in ZooBank under urn:lsid:zoobank.org:pub:C8303B05-FDD1-4D88-8720-5E9DDE3A655C.
Funding Information:
We would like to thank Michel D. Gianetti, Osvaldo T. Oyakawa, Alessio Datovo, and Mario C. C. de Pinna (MZUSP) for curatorial assistance; Renato Contessotto (Laboratório de Caracterização Tecnológica, Escola Politécnica da USP) for the radiographs; Denise Bjornoy, Patric Belen and Andrew Stradling (MARPORT) for the fishing sensors, Werner Schwarzhans (University of Copenhagen) and an anonymous reviewer for suggestions. MRMS and AAG are deeply indebted to the crew of the R/V Alpha Crucis under the commandment of José Rezende; to Ivoneide E. Gattei and J. Gustavo Imakawa (IO-USP) for the logistic management; and Flávia T. Masumoto, Heloisa C. Caixeta, Mayza Pompeu, Nathalie A. Fernandes, Rayane S. de França (IO-USP), Rodrigo A. Caires (MZUSP) and Polyana Roque (UFRPE) for the field assistance during the DEEP-OCEAN project expeditions. Funding was provided to MRSM by Fundação de Amparo à Pesquisa do Estado de São Paulo ( FAPESP 2017/12909–4), and AAG receives a PhD fellowship from the Conselho Nacional de Desenvolvimento Científico e Tecnológico ( CNPq 159146/2018–6).
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© 2021 Elsevier Ltd
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