The microscopic ellobioid, Zospeum Bourguignat, 1856 (Pulmonata, Ellobioidea, Carychiidae) makes a big debut in Basque Country and the province of Burgos (Spain)

Two thriving colonies and a new distribution of the minute troglobitic ellobioid snail, Zospeum Bourguignat, 1856 have been discovered in the Cordillera Cantábrica of northern Spain. This is the first report of Zospeum sp. in Arrikrutz Cave in the Aizkorri massif (Gipuzkoa, Basque Country). Another rich colony, including nest-like cavities comprising fecal strands of another Zospeum sp. was discovered in Cueva de Las Paúles in Sierra Salvada (Burgos Province).