(ofAsterias filiformis O.F. Müller, 1776) Müller, O. F. (1776). Zoologiae Danicae prodromus: seu Animalium Daniae et Norvegiae indigenarum characteres, nomina, et synonyma imprimis popularium. <em>Hafniae, Typiis Hallageriis.</em> 1-274., available online at http://www.biodiversitylibrary.org/item/47550 [details]
(ofAmphiodia ascia Mortensen, 1936) Mortensen, T. (1936). Echinoidea and Ophiuroidea. <em>Discovery Reports.</em> 12: 199-348, pls. 1-9. (iii-1936)., available online at http://www.biodiversitylibrary.org/item/28331#page/215/mode/1up [details]
context source (Deepsea)
Intergovernmental Oceanographic Commission (IOC) of UNESCO. The Ocean Biogeographic Information System (OBIS), available online at http://www.iobis.org/ [details]
basis of record
Hansson, H.G. (2001). Echinodermata, <B><I>in</I></B>: Costello, M.J. <i>et al.</i> (Ed.) (2001). <i>European register of marine species: a check-list of the marine species in Europe and a bibliography of guides to their identification. Collection Patrimoines Naturels,</i>. 50: pp. 336-351. (look up in IMIS) [details]
Southward, E.C.; Campbell, A.C. (2006). [Echinoderms: keys and notes for the identification of British species]. <i>Synopses of the British fauna (new series)</i>, 56. Field Studies Council: Shrewsbury, UK. ISBN 1-85153-269-2. 272 pp. (look up in IMIS) [details]
Muller, Y. (2004). Faune et flore du littoral du Nord, du Pas-de-Calais et de la Belgique: inventaire. [Coastal fauna and flora of the Nord, Pas-de-Calais and Belgium: inventory]. <em>Commission Régionale de Biologie Région Nord Pas-de-Calais: France.</em> 307 pp., available online at http://www.vliz.be/imisdocs/publications/145561.pdf [details]
Dyntaxa. (2013). Swedish Taxonomic Database. Accessed at www.dyntaxa.se [15-01-2013]., available online at http://www.dyntaxa.se [details]
Hansson, H. (2004). North East Atlantic Taxa (NEAT): Nematoda. Internet pdf Ed. Aug 1998., available online at http://www.tmbl.gu.se/libdb/taxon/taxa.html [details] Available for editors
From editor or global species database
Biology This species is luminescent emitting a blue light. [details]
From other sources
Biology The larvae of A. filiformis are found throughout the summer from July to October. A. filiformis belongs to the long-lived species with relatively fast growth in the juvenile stage followed by a much slower growing adult phase. Its life span may be up to 20 years (Mortensen, 1927; Buchanan, 1964; O'Conner et al., 1983; Gage, 1990).
A. filiformis burrows about 5 cm into the substrate. The species must reach a certain size to be able to burrow down into the sediment for it must, using its serpentine arms, keep contact with the sediment surface (O'Conner et al., 1983; Gage, 1990). The arms of the brittle star have three main functions: ventilation and respiration, transport of sediment and waste materials out of the burrow, and collection and transport of food (Ockelmann & Muus, 1978).
A. filiformis is a suspension feeder, collecting mixed micro-plankton, resuspended bottom material and detritus. The animals extend their arms into the surrounding water, filtering part [details]
Breeding Ophiopluteus larva. Summer [details]
Distribution From 5 to more than 200 m depth, in muddy sand or mud, all round the British Isles, except, possibly, the southeast [details]
Distribution A. filiformis is very abundant in the area of the Oyster Ground, north of the 30 m isobath, with the highest biomass in the western part of the Frisian Front area. The species is not present in the sandy Southern Bight and is scarce at the Dogger Bank.
In the Dutch sector of the North Sea A. filiformis lives in very fine sand with a mean mud content of 11 %. This is in agreement with other investigations, which found high-density populations in muddy deposits (Buchanan, 1964; Woodley,1975; O'Conner et al., 1983; Gage, 1990; Hayward & Ryland, 1990). [details]
Morphology The disk of A. filiformis is covered with scales on the dorsal side only, leaving the ventral side naked. The diameter of disk can be up to 8-10 mm. The long, fine arms are about ten times longer than the diameter of the disk. lts colour is reddish- or greyish-brown (Mortensen, 1927; Southward, 1972; Hayward & Ryland, 1990). [details]