3 NEW SPECIES AND A NEW SUBGENUS OF GULELLA (GASTROPODA, STREPTAXIDAE) FROM TANZANIA

Three small species of Gulella from forests in northern Tanzania are d escribed as new species. One of the new species, Gulella spinosa, is t he first Gulella or member of the family Streptaxidae which has been r eported with a spinal shell. The new species share several conchologic al characters which have not been reported elsewhere in the genus Gule lla and they are assigned to a new subgenus, Juventigulella. The main characters defining Juventigulella are the conical or conical-ovate sh ell shape, detached aperture and open umbilicus. The subgeneric name r efers to the superficially juvenile appearance of adult specimens. Gul ella habibui is designated as the type species.