Title:

Obtusoecia (Halocyprida: Myodocopa: Ostracoda) a bipolar planktonic oceanic genus : Taxonomy, bathymetry and zoogeographical distribution

Subtitle:

Annales Zoologici, vol. 56, no 1 ; Planktonic ostracod genus Obtusoecia

Creator:

Angel, Martin Vivian ; Błachowiak-Samołyk, Katarzyna

Contributor:

Muzeum i Instytut Zoologii Polskiej Akademii Nauk

Publisher:

Fundacja Natura optima dux

Place of publishing:

Warszawa

Date issued/created:

2006

Description:

Bibliogr. p. 208-210 ; P. 197-213 : ill. ; 27 cm ; Taxa in Latin

Type of object:

Journal/Article

Subject and Keywords:

halocyprid ; ostracods ; taxonomy ; bathymetry ; zoogegraphy ; bipolarity

Abstract:

Full detailed descriptions of the two species of Obtusoecia, one of two planktonic halocyprid ostracod genera that are bipolar, demonstrate that the taxonomic separation of these two forms formerly considered to be conspecific, is valid. The segregation of the genus from Porroecia is also validated. The value of characters of limbs other than the first and second antennae particularly in defining halocyprid genera is emphasised. Zoogeographical distributions of the two species based on comprehensive compilations of both published and unpublished data show that O. obtusata is confined to the North Atlantic, whereas O. antarctica has an Antarctic circumpolar distribution. Detailed bathymetric profiles show that O. obtusata is a shallow mesopelagic species that is overwhelmingly dominant at depths of 50–200 m in subpolar seas, and shows limited ability to submerge at lower depths, so thatit is restricted to seas that have a marked seasonal cycle of turn-over and stratification. It is postulated that the bathymetric distributions of the two species are similar, also that O. antarcticais more likely to be ancestral to O. obtusata than vice versa.

Relation:

Annales Zoologici

Volume:

56

Issue:

1

Start page:

197

End page:

213

Resource type:

Text

Detailed Resource Type:

Article : original article

Format:

application/pdf

Source:

MiIZ PAN, call no. P.255, vol 56, no 1 ; MiIZ PAN, call no. P.4314, vol 56, no 1 ; click here to follow the link

Language:

eng

Language of abstract:

eng

Rights:

Rights Reserved - Restricted Access

Terms of use:

Copyright-protected material. Access only on terminals at the Museum and Institute of Zoology of the Polish Academy of Sciences, may be used within the limits of statutory user freedoms.

Digitizing institution:

Museum and Institute of Zoology of the Polish Academy of Sciences

Original in:

Library of the Museum and Institute of Zoology of the Polish Academy of Sciences

Projects co-financed by:

European Union. European Regional Development Fund ; Programme Innovative Economy, 2010-2014, Priority Axis 2. R&D infrastructure

Access:

Closed