![]() |
||
|
Cybium,
International Journal of Ichthyology |
|
A new species and additional records of Paraliparis (Scorpaeniformes: Liparidae) from the Southern Ocean with a provisional field key to juveniles Natalia V. CHERNOVA (1) & Guy DUHAMEL (2) (1) Zoological
Institute Russian Academy of Sciences, 199034, St.Petersburg, RUSSIA. Abstract.
- A small collection of liparid fishes was made by French scientific
or fishing cruises off the Kerguelen and Crozet Islands in the recent
years. A new species, P. obliquosus sp. n., is described. Other
species collected included: Paraliparis copei kerguelensis, P. copei
wilsoni, P. gracilis, P. neelovi with a closely related form designated
as P. cf. neelovi, P. operculosus, P. thalassobathyalis,
and also one young fish of an undescribed species, Paraliparis
sp. Additional diagnostic characters were found for P. copei wilsoni
and P. copei kerguelensis. They include: chin pores open separately
(vs in a common pit), interneural of the first dorsal ray situated
between vertebrae 5/6 to 8/9 (vs between 3/4 to 5/6), skin of specimens
in alcohol cream-brown (vs milky pale), chin and snout blackish-brown
(vs pale), anus slightly behind a vertical through the gill opening
(vs slightly in front of it). The Crozet islands constitute an
extension of the geographical distribution and of the bathymetric range
(700-1040 m vs 960-1134 m) for P.c. wilsoni. Some differences
in Paraliparis gracilis were found between specimens from South
Georgia (Atlantic sector of Southern Ocean) and those from the Crozet
islands (Indian sector). Paraliparis operculosus occurred deeper
than previously (1129-1295 m vs 380-1010 m). Paraliparis thalassobathyalis
appeared polymorphic, with three different types, mainly recognized by
the shape of head and body and colour patterns. They might represent sexual
dimorphic differences, or epibenthic and pelagic forms, although our material
was insufficient for final conclusion. Juveniles of 13.2 - 44.0 mm SL
of P. obliquosus, P. neelovi, P. cf. neelovi, P. operculosus, P. thalassobathyalis
and Paraliparis sp. were found pelagically. A field key to early
juveniles of the nine Paraliparis is proposed. |
| Copyright © SFI 2005. Modified: 30.09.2011 14:01 - Contact: Webmaster |