RT Book, Section T1 Northeastern Turkey, an unnoticed but very important area for the Orthotrichaceae (Bryophyta) A1 Lara, Francisco A1 Mazimpaka, Vicente A1 Medina Bujalance, Rafael A1 Caparrós, Rut A1 Garilleti, Ricardo A2 Schweizerbart science publishers, AB In the course of a prospecting trip in square A4 in Turkey, the authors have recorded a total of 29 species of Orthotrichaceae. This increases by 19 the number of species in this moss family in the area. Among the discoveries are 11 new records for Turkey: Orthotrichum callistomum, O. consobrinum, O. crenulatum, O. hispanicum, O. rogeri, O. sordidum, O. stellatum, O. vladikavkanum, Ulota coarctata, U. rehmannii and Zygodon dentatus, some of them previously unknown in Asia. Furthermore, Orthotrichum microcarpum is reported for the fi rst time from Anatolia and new populations of some other little known mosses in Turkey are documented: O. alpestre, O. patens, O. scanicum, and O. vittii. Data on distribution and habitat in the prospected territory are provided for each of the species. The novelties are discussed and comments provided on global distribution and key characters for differentiation, in some cases accompanied by illustrations. In the light of the new data, North-eastern Turkey is shown to be one of the mostdiverse and interesting areas for Orthotrichaceae in the Palaearctic. PB Schweizerbart and Borntraeger science publishers SN ISBN 978-3-443-51060-2 SN 1438-9134 YR 2010 FD 2010-11-01 LK https://hdl.handle.net/20.500.14352/95648 UL https://hdl.handle.net/20.500.14352/95648 LA eng NO This work was funded by the Spanish Ministry of Education and Science, Grants CGL2004–03513 and CGL2007–61389. DS Docta Complutense RD 22 jul 2024