External morphology, skeleton organization, spicule type and cytology of Leucosolenia creepae, Leucosolenia somesii, Leucosolenia sp. A and Leucosolenia variabilis

Raw data for the manuscript 'The complex case of the calcareous sponge Leucosolenia complicata (Porifera: Calcarea): hidden diversity in Boreal and Arctic regions with description of a new species' (Zoological Journal of the Linnean Society).

1) External morphology, skeleton organization, spicule types and cytology of Leucosolenia creepae, Leucosolenia sp. A and Leucosolenia variabilis (White Sea, N.A. Pertsov White Sea Biological Station MSU, 66°34′N, 33°08′E).

2) External morphology, skeleton organization and spicule types for Leucosolenia somesii from Zoological Museum of Amsterdam (ZMA) (ZMA Por. 17572; Colijnsplaat, Zeeland, Netherlands)