Calvetopora, Berning & Harmelin & Bader & Cibio, 2017

Berning, Björn, Harmelin, Jean-Georges & Bader, Beate, 2017, New Cheilostomata (Bryozoa) from NE Atlantic seamounts, islands, and the continental slope: evidence for deep-sea endemism, European Journal of Taxonomy 347, pp. 1-51 : 43

Calvetopora sp.

Fig. 15 A–B, Table 15

Material examined

GREAT METEOR BANK: 1 small and bioeroded colony fragment free of a substrate, mounted on stub and sputter-coated, Stn 22 ( OLL 2016/155); 2 small and bioeroded colony fragments free of a substrate, mounted on stub and sputter-coated, Stn 22 ( OLL 2016/156); 1 small colony fragment free of a substrate, mounted on stub and sputter-coated, Stn 20, ( OLL 2016/157); 3 small and bioeroded colony fragments free of a substrate, mounted on stub and sputter-coated, Stn 22 ( OLL 2016/158).

Remarks

The examined specimens are very closely related to C. otapostasis gen. et sp. nov., yet differ in having smaller zooids, orifices and avicularia. Moreover, the orifice margin bears six (rarely five) spines, and the avicularia are more laterally directed ( Fig. 15B ). The available material, which comprises only a few small and bioeroded fragments lacking ovicells, and which were found in sediment samples, is insufficient in order to unambiguously determine whether it belongs to C. otapostasis gen. et sp. nov. or should rather be ascribed to another new species. Considering the geographic distance between Atlantis Smt and the Great Meteor Bank, however, we here treat C. otapostasis gen. et sp. nov. and Calvetopora sp. as distinct species. The specimens were found on the Great Meteor Bank at depths between 403 and 476 m.

Figures

Fig. 15. Calvetopora sp., Great Meteor Bank, OLL 2016/157. A. Overview of colony fragment. B. Closeup of orifice and avicularia. Scale bars: A = 300 µm, B = 100 µm.