Fróðskaparrit - 01.01.2001, Side 105

Fróðskaparrit - 01.01.2001, Side 105
109 Brachiopoda in the Faroe Islands area Armfótingar (Brachiopoda) í føroyskum øki Elsebeth Thomsen Tromsø University Museum, Department of Geology, N-9037 Tromsø, Norway. Phone: +47 776 45033, Fax: +47 776 45520, E-mail: elsebeth@imv.uit.no Úrtak Seks sløg av armfótingum (Brachipoda) vórðu funnin í tilfari, savnað gjøgnum BIOFAR-verkætlanini: Crania anomala (Miiller, 1776), Hemithiris psittacea (Gmelin, 1790) — ein tóm skel, Terebratulina retusa (Linne, 1758), Platidia anomioides (Scacchi and Philippi, 1844) - nýtt slag fyri Føroyar, Dallina septigera (Loven, 1846) og Macandrevia cranium (Miiller, 1776). Allir føroyskir armfótingar síla føði úr sjónum og sita á botn- inum, ein:(C. anomala) er klistaður til legufast botntil- far. H. psittacea undantikin, er bert eitt slag bundið til eitt ávíst geografisk øki einamest á bankunum. Hetta slagið undantikin, dýpi millum 200 og 500 metrar verða tikin framum sum livistað. Tey flestu armfótingasløgini koma bara fyri har Atlantssjógvur er (Atlantic Water: hitin meira enn 7°C), eisini hevur biandingur av Atlants- sjógvi og sjógvi norðaneftir (Arctic Intermediate Water; hiti millum 3,5°og 7°) týdning, tó so at tey trívast best i sjógvi heitari enn 6°. D. septigera tykist tola lágan hita eisini og er tí einamest at finna í blandingini av Atlants- sjógvi og sjógvi nordaneftir. Abstract Six brachiopod species have been recorded in the BIO- FAR material: Crania anomala (Miiller, 1776), Hemithiris psittacea (Gmelin, 1790) - one empty shell, Terebratulina retusa (Linne, 1758), Platidia anomio- ides (Scacchi & Philippi, 1844) - new to the area, Dal- lina septigera (Loven, 1846) and Macandrevia cranium (Miiller, 1776). AU the Faroese brachiopods are epibenthic suspen- sion feeders Iiving attached or cemented (C. anomala) to firm substrates. Not including the record of H. psit- tacea, only one species (P. anomioides) seems to be ge- ographically restricted, occuring primarily at the banks. With the exception of this species there is a general pref- erence for depths between 200 and 500 m. Most of the brachiopod species are confined to the Atlantic Water (temperature above 7°C), but a mixture of Atlantic Water and Arctic Intermediate Water (tem- perature range 3.5-7°C) is also important. the species however, showing a preference for temperatures above 6°C. D. septigera seems to tolerate lower temperatures as well, and thus preferring a mixture of Atlantic Water and Arctic Intermediate Water. Previous investigations The first record of brachiopods in the Faroe area was published in 1786 by Nicolai Pe- dersen Mohr in his major work ”Forsøg til en Islandsk Naturhistorie, med adskillige oekonomiske samt andre Anmærkninger". According to Ehrencron-Miiller (1927), Mohr was bom in Tórshavn, studied in Copenhagen and travelled round the Faroes in 1776-1778. In 1780 he was sent to Ice- land by royal appointment to look for kaolin for the newly established Royal Porcelain Factory in Copenhagen. During this expedition (1780-1781) he also de- scribed the natural history of the areas he visited; hence the aforementioned publica- tion. Fróðskaparrit 49. bók 2001: 109-126
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