ABSTRACT
A new species is proposed based on material collected in the states of Minas Gerais, Sao Paulo, Santa Catarina, and Rio Grande do Sul, Brazil. The morphology, radula, and jaw are described and illustrated. The new species is compared to Belocaulus angustipes, the only species of the genus currently considered valid. The main differences are found in the penis. The new species has small projections, similar to tubercles, on the anterior region of the glans, which can be scattered or arranged in two, three or more longitudinal rows. The terminal extremity of the glans has digitiform margin. The penis base is short and poorly defined. The accessory gland is completely immersed in the tegument. The description of the new species extends the distribution range of Belocaulus for the states of Minas Gerais and Sao Paulo, Brazil...
