What is "jurellana"

Jurellana tithonia, the only species in the genus Jurellana, is the oldest known fossil porcelain crab. It was found in limestone rocks from the Ernstbrunn Formation in Austria, which have been dated to the Tithonian (late Jurassic). It differs from extant porcelain crabs by the down-turned form of the rostrum, which points forwards in other porcelain crabs.