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Type: Article
Published: 2021-05-31
Page range: 99–112
Abstract views: 305
PDF downloaded: 21

Description of a new eelpout Pachycara angeloi sp. nov. (Perciformes: Zoarcidae) from deep-sea hydrothermal vent fields in the Indian Ocean

University of Hamburg, Center of Natural History (CeNak), Zoological Museum, Martin-Luther-King-Platz 3, 20146 Hamburg, Germany.
biome-id GbR, c/o Senckenberg am Meer, German Centre for Marine Biodiversity Research (DZMB), Südstrand 44, 26382 Wilhelmshaven, Germany.
INES, Integrated Environmental Solutions, c/o Senckenberg am Meer, German Centre for Marine Biodiversity Research (DZMB), Südstrand 44, 26382 Wilhelmshaven, Germany.
INES, Integrated Environmental Solutions, c/o Senckenberg am Meer, German Centre for Marine Biodiversity Research (DZMB), Südstrand 44, 26382 Wilhelmshaven, Germany.
Pisces Lycodinae DNA barcoding Southern Central Indian Ridge Northern Southeast Indian Ridge

Abstract

A new species of eelpout genus Pachycara Zugmayer, 1911 is described based on five specimens caught at a depth of 2419–3275 m along the Central and Southeast Indian Ridges in the Indian Ocean. The specimens were collected during the INDEX cruises in 2016, 2018 and 2019, respectively. The new species is distinguished from its congeners by the following combination of characters: scales and pelvic fins absent; lateral line configuration mediolateral; dorsal fin origin associated with vertebrae 7–9 with no free predorsal pterygiophores; vertebrae 27–28 + 57–59 = 85–87; dorsal-fin rays 78–80, anal-fin rays 58–62; pectoral fin rays 13–15. DNA sequences of a mitochondrial COI gene fragment showed low intra-specific variation ranging from 0–0.3 % sequence divergence and do not reflect different vent sites. This is the 29th species of Pachycara, which is the fifth to be described from specimens collected only from chemosynthetic environments and the sixth known from the Indian Ocean.

 

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