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Fróðskaparrit - 01.01.2001, Qupperneq 38
42 CORALLINE RED ALGAE (CORALLINALES, RHODOPHYTA) OF THE FAROEISLANDS the comprehensive work on coralline red algae from the British Isles (Irvine and Chamberlain, 1994), offer the opportunity to compare the records from the Faroe Is- lands with other recent investigations in the northeastern North Atlantic. Most of the re- ported species are common to all areas, but Clathromorphum circumscriptum has only been recorded from the Faroe Islands. An earlier record from the British Isles was shown to be a misidentification (Chamber- lain and Irvine, 1994b). The species repre- sents an Arctic or northem element of the flora as it is well known from westem Greenland (Wegeberg, pers. obs.) and Ice- land (Caram and Jónsson, 1972). Litho- phyllum incrustans and L. orbiculatum are recorded from the British Isles (Chamber- lain and Irvine, 1994a) and Norway (Brat- tegaard and Holthe, 1997) as well as the Faroe Islands. They are, however, not recorded in the recent investigation in the Sogn and Fjordane district, Norway (Lein et al., 1998; 1999). The former confusion between L. crouanii and L. orbiculatum, mentioned above (see also Chamberlain et al., 1988), makes it difficult to evaluate the full extent of their distribution in the north- eastem North Atlantic. However, as the record of L. orbiculatum from Iceland by Caram and Jónsson (1972) was a misiden- tification of L. crouanii (Chamberlain et al., 1991), and as both L. incrustans and L. orbiculatum are recorded as far south as the Mediterranean (Chamberlain and Irvine, 1994a), these species probably represent a southern element of the coralline flora on the Faroe Islands. Phymatolithon laeviga- tum is widespread throughout all areas, al- though not observed in the recent investi- gation of the flora in the Sogn and Fjordane district of Norway (Lein etai, 1998; 1999) and not recorded for Iceland (Caram and Jónsson, 1972). Therefore this species may be on the edge of its distribution in the northeastern North Atlantic and represents a more southernly element of the Faroe Is- lands’ flora. This is in agreement with Børgesen’s (1905) conclusion that the Faroe Islands represents the northem distri- butional limit of P. laevigatum. Acknowledgements We are very grateful to all staff members at the Kalđbak Marine Biological Laboratory, to colleagues, and stu- dents who participated in the fieldwork and assisted in many ways in the field as well as in the laboratory. Thanks are also due to Yvonne M. Chamberlain for reading and improving the manuscript. Peer Corfixen, Botanical Museum, Copenhagen, maintained the data- base. The programme was supported financially by the Carlsberg Foundation. References Brattegaaard, T, and Holthe, T. 1997. Distribution of marine, benthic macroorganisms in Norway. A tab- ulated catalogue. Preliminary edition. Research re- port for DN 1997-1. Direktoratet for naturforvalt- ning. Trondheim. Brummit, R. K. and Powell, C. E. (eds). 1992. Authors ofplant names. Kew: 1-732. Børgesen F. 1903 (offprint 1902). The marine algae of the Færoes. In: Warming, E. (ed.), The Botany ofthe Faróes based upon Danish investigations. Part II: 339-532. Copenhagen. Børgesen, F. 1908 (offprint 1905). The algae-vegetation of the Faeroese coasts with remarks on the phyto-ge- ography. ln: Warming, E. (ed.), The Botany of the Faróes based upon Danish investigations. Part II: 683-834. Copenhagen. Caram, B. and Jónsson, S. 1972. Nouvel inventaire des algues marines de l'Islande. Acta Botanica Islandi- ca 1: 5-31. Chamberlain, Y.M. 1991. Historical and taxonomic
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