须狗鲛科（学名Leptochariidae）是板鳃亚纲真鲨目的其中一科，其下只有一属一种，即细须雅鲨(Leptocharias smithii)。

The barbeled houndshark (Leptocharias smithii) is a species of ground shark and the only member of the family Leptochariidae. This demersal species is found in the coastal waters of the eastern Atlantic Ocean from Mauritania to Angola, at depths of 10–75 m (33–246 ft). It favors muddy habitats, particularly around river mouths. The barbeled houndshark is characterized by a very slender body, nasal barbels, long furrows at the corners of the mouth, and sexually dimorphic teeth. Its maximum known length is 82 cm (32 in).