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Walter Herwig 1978 (FFS): SeaStars (Echinodermata, Asteroidea)
Citation
Danis B, Wilmes J, Jangoux M, 2008. Sea stars from the Walter Herwig FFS expedition. Contribution to the SCAR-Marine Biodiversity Information Network.

Access data
Archived data
Availability: Creative Commons License This dataset is licensed under a Creative Commons Attribution 4.0 International License.

Description
This dataset includes information on sea stars collected during one of the Walter Herwig expeditions (1978). Sampling took place during the FFS (Fischereiforschungsschiff) voyage. The expedition focused on the continental shelf of Patagonia, down to the Falklands (Malvinas) Islands. more

The asteroids of the Walter Herwig FFS expedition have been identified in detail, based on the observation of external morphological characters using a binocular microscope. A wide variety of morphological characters was taken into consideration for the identification of the asteroids. For instance, shape and size of the pedicellaria, the skeletal structure (réseau squelettique) and the ossicles that form the mesh (number of spines/ossicle), thickness and aspect of the body wall, the position of the papula, the number of podia rows and the shape of the podia, structure and armature of the marginal plates, number and form of the adambulacral spines as well as the spines of the dental plates, etc. By means of a preexisting identification key of Atlantic asteroids (A.M. Clark, 1994), the observation of the morphological characters permitted to identify the order, the family, the genus and sometimes the species to which the considered individual belonged to. For the time being, there are no existing identification keys for Antarctic asteroids. For this reason, we consulted in addition multiple works of previous Antarctic expeditions (A.M. Clark (1962, 1994), R. Köhler (1906, 1907, 1908, 1911, 1912, 1917, 1920, 1923), W.K. Fisher (1911,1940), Sladen (1889), Mortensen (1932), E. Perrier (1891a), H. Ludwig (1905), Th. Studer (1874), I. Bernasconi (1967, 1964, 1966, 1972), Madsen (1950)) which allowed us to improve the identifications in dubious cases, thanks of their numerous detailed illustrations and descriptions of Antarctic asteroids. Synonymy was resolved by consulting the Register of Antarctic Marine Species (RAMS), that is accessible via internet and that compiles the most recent information about Antarctic asteroid taxonomy (Danis & Jangoux, 2007), delivering us in this way the valid species names.

Scope
Keywords:
Marine, Asteroids, Distribution, PS, Southern Ocean, Asteroidea

Geographical coverage
PS, Southern Ocean [Marine Regions]

Temporal coverage
1978
Unknown

Taxonomic coverage
Asteroidea [WoRMS]

Parameters
Count, Presence of biota

Contributors
Koninklijk Belgisch Instituut voor Natuurwetenschappen (IRScNB/KBIN), moredata creatordata manager Koninklijk Belgisch Instituut voor Natuurwetenschappen; Operationele Directie Natuurlijk Milieu (OD Natuur), more

Related datasets
Published in:
AntOBIS: Antarctic Ocean Biogeographic Information System, more

Dataset status: Completed
Data type: Data
Data origin: Research: field experiment
Metadatarecord created: 2008-06-13
Information last updated: 2008-06-13
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