The Brazilian guitarfish (Pseudobatos horkelii) is a species of fish in the family Rhinobatidae.

This fish is viviparous and has a long gestation period, concluding with the birth of live pups in February.

They named the new species in honour of the German botanist, Dr. Johann Horkel, Professor of Plant Physiology at the University of Berlin, who had sent them a specimen of the fish preserved in alcohol.

The eggs are contained within a casing and remain dormant inside the female until she return to the warm, shallow waters of the inner continental shelf in November.

Here both females and juveniles are particularly susceptible to being caught by pair-trawling and beach seine netting.