Revision of the cosmopolitan deep-sea genus Sciadonus (Teleostei, Bythitidae) with two new species

Jorgen G. Nielsen

doi:10.26028/cybium/2018-422-005

Revision of the cosmopolitan deep-sea genus Sciadonus (Teleostei, Bythitidae) with two new species

2 Citationer (Scopus)

Abstract

Jorgen G. NIELSEN Abstract. - The genus Sciadonus Garman, 1899 belongs to the aphyonid clade within the Bythitidae. The present revision is based on 304 specimens all trawled at great depths (1169-5610 m), 19 of which have not been examined earlier. As a consequence, the generic diagnosis from Nielsen et al. (1999) is here modified. The enlarged material resulted in synonymizing of S.galatheae (Nielsen, 1969) and S.pedicellaris Garman, 1899 and in the e description of two new species, S. Robinsi and S. longiventralis. The new species differ from the other Sciadonus species by lack of pigmentation, fewer dorsal fin rays and position of origin of anal fin. S. longiventralis differs from S. Robinsi by shorter predorsal length (28.5 vs 42.5% SL) and length of pelvic fin rays (3.5% SL vs no pelvic rays).

Originalsprog	Engelsk
Tidsskrift	Cybium
Vol/bind	42
Udgave nummer	2
Sider (fra-til)	177-187
ISSN	0399-0974
DOI	https://doi.org/10.26028/cybium/2018-422-005
Status	Udgivet - 30 jun. 2018

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10.26028/cybium/2018-422-005Licens: CC BY

8-Nielsen 1051 [Cybium 2018, 422]177-187Forlagets udgivne version, 4,12 MBLicens: CC BY

Citationsformater

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title = "Revision of the cosmopolitan deep-sea genus Sciadonus (Teleostei, Bythitidae) with two new species",

abstract = "Jorgen G. NIELSEN Abstract. - The genus Sciadonus Garman, 1899 belongs to the aphyonid clade within the Bythitidae. The present revision is based on 304 specimens all trawled at great depths (1169-5610 m), 19 of which have not been examined earlier. As a consequence, the generic diagnosis from Nielsen et al. (1999) is here modified. The enlarged material resulted in synonymizing of S.galatheae (Nielsen, 1969) and S.pedicellaris Garman, 1899 and in the e description of two new species, S. Robinsi and S. longiventralis. The new species differ from the other Sciadonus species by lack of pigmentation, fewer dorsal fin rays and position of origin of anal fin. S. longiventralis differs from S. Robinsi by shorter predorsal length (28.5 vs 42.5% SL) and length of pelvic fin rays (3.5% SL vs no pelvic rays).",

keywords = "Teleostei, Bythitidae, Sciadonus, Revision, New species",

author = "Nielsen, {Jorgen G.}",

year = "2018",

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doi = "10.26028/cybium/2018-422-005",

language = "English",

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journal = "Cybium",

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T1 - Revision of the cosmopolitan deep-sea genus Sciadonus (Teleostei, Bythitidae) with two new species

AU - Nielsen, Jorgen G.

PY - 2018/6/30

Y1 - 2018/6/30

N2 - Jorgen G. NIELSEN Abstract. - The genus Sciadonus Garman, 1899 belongs to the aphyonid clade within the Bythitidae. The present revision is based on 304 specimens all trawled at great depths (1169-5610 m), 19 of which have not been examined earlier. As a consequence, the generic diagnosis from Nielsen et al. (1999) is here modified. The enlarged material resulted in synonymizing of S.galatheae (Nielsen, 1969) and S.pedicellaris Garman, 1899 and in the e description of two new species, S. Robinsi and S. longiventralis. The new species differ from the other Sciadonus species by lack of pigmentation, fewer dorsal fin rays and position of origin of anal fin. S. longiventralis differs from S. Robinsi by shorter predorsal length (28.5 vs 42.5% SL) and length of pelvic fin rays (3.5% SL vs no pelvic rays).

AB - Jorgen G. NIELSEN Abstract. - The genus Sciadonus Garman, 1899 belongs to the aphyonid clade within the Bythitidae. The present revision is based on 304 specimens all trawled at great depths (1169-5610 m), 19 of which have not been examined earlier. As a consequence, the generic diagnosis from Nielsen et al. (1999) is here modified. The enlarged material resulted in synonymizing of S.galatheae (Nielsen, 1969) and S.pedicellaris Garman, 1899 and in the e description of two new species, S. Robinsi and S. longiventralis. The new species differ from the other Sciadonus species by lack of pigmentation, fewer dorsal fin rays and position of origin of anal fin. S. longiventralis differs from S. Robinsi by shorter predorsal length (28.5 vs 42.5% SL) and length of pelvic fin rays (3.5% SL vs no pelvic rays).

KW - Teleostei

KW - Bythitidae

KW - Sciadonus

KW - Revision

KW - New species

U2 - 10.26028/cybium/2018-422-005

DO - 10.26028/cybium/2018-422-005

M3 - Journal article

SN - 0399-0974

VL - 42

SP - 177

EP - 187

JO - Cybium

JF - Cybium

IS - 2

ER -

Revision of the cosmopolitan deep-sea genus Sciadonus (Teleostei, Bythitidae) with two new species

Abstract

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