Ossetra genitive case form "осетра" (osetra, 'of sturgeon') of the Russian word "осётр" (osyotr 'sturgeon') from the phrase "икра осетра" (ikra osetra, 'caviar of sturgeon'). At one time, the term "ossetra" simply referred to Russian sturgeon species harvested for this type of caviar. In Russian, there are different names for the species of sturgeon that live in various territories such as "Beluga" ("Huso huso"), Sevruga ("Acipenser stellatus") and Sterlet ("Acipenser ruthenus"). The name Ossetra corresponds to the species "Acipenser gueldenstaedtii", which is much smaller than Beluga sturgeon ("Huso huso"), and has a firmer texture. In the territory of the Russian Federation
The Types of the Scandinavian Medieval Ballad differences of the variants of the ballad and how they differ, and comprises a list of appearances in various Nordic ballad collections. Almost all of the ballad types given in the Danish (DgF), Faroese (CCF), Icelandic (IFkv), or Swedish (SMB) ballad type listings also have a specific TSB type listing. (The exceptions are a few texts, which now are known to be of rather recent origin, or are otherwise found to be deficient.) Norsk visearkiv, which is responsible for the corresponding Norwegian ballad project, has decided to employ the TSB classification directly. Many Scandinavian ballad types are also easily recognised