TY - JOUR A1 - Titschack, Jürgen A1 - Baum, Daniel A1 - De Pol-Holz, Ricardo A1 - López Correa, Matthias A1 - Forster, Nina A1 - Flögel, Sascha A1 - Hebbeln, Dierk A1 - Freiwald, André T1 - Aggradation and carbonate accumulation of Holocene Norwegian cold-water coral reefs JF - Sedimentology Y1 - 2015 U6 - https://doi.org/10.1111/sed.12206 VL - 62 IS - 7 SP - 1873 EP - 1898 PB - Wiley ER - TY - GEN A1 - Titschack, Jürgen A1 - Baum, Daniel T1 - Ambient occlusion - a powerful algorithm to segment skeletal intrapores and gastral cavities in dendrophyllid cold-water corals T2 - Poster, 31st IAS Meeting of Sedimentology, 2015, June 22-25, Kraków, Poland Y1 - 2015 ER - TY - JOUR A1 - Matsuyama, Kei A1 - Titschack, Jürgen A1 - Baum, Daniel A1 - Freiwald, André T1 - Two new species of erect Bryozoa (Gymnolaemata: Cheilostomata) and the application of non-destructive imaging methods for quantitative taxonomy JF - Zootaxa N2 - Two new species of cheilostome Bryozoa are described from continental-slope habitats off Mauritania, including canyon and coldwater-coral (mound) habitats. Internal structures of both species were visualised and quantified using micro-computed tomographic (micro-CT) methods. Cellaria bafouri n. sp. is characterised by the arrangement of zooids in alternating longitudinal rows, a smooth cryptocyst, and the presence of an ooecial plate with denticles. Smittina imragueni n. sp. exhibits many similarities with Smittina cervicornis (Pallas, 1766), but differs especially in the shape and orientation of the suboral avicularium. Observations on Smittina imragueni and material labelled as Smittina cervicornis suggest that the latter represents a species group, members of which have not yet been discriminated, possibly because of high intracolony variation and marked astogenetic changes in surface morphology. Both new species are known only from the habitats where they were collected, probably reflecting the paucity of bryozoan sampling from this geographic area and depth range. Both species are able to tolerate low oxygen concentration, which is assumed to be compensated by the high nutrient supply off Mauritania. The application of micro-CT for the semiautomatic quantification of zooidal skeletal characters was successfully tested. We were able to automatically distinguish individual zooidal cavities and acquire corresponding morphological datasets. Comparing the obtained results with conventional SEM measurements allowed ascertaining the reliability of this new method. The employment of micro-CT allows the observation and quantification of previously un- seen characters that can be used in describing and differentiating species that were previously indistinguishable. Further- more, this method might help elucidate processes of colony growth and the function of individual zooids during this process. Y1 - 2015 U6 - https://doi.org/10.11646/zootaxa.4020.1.3 VL - 4020 IS - 1 SP - 81 EP - 100 ER -