Gillellus semicinctus Gilbert, 1890 .

Halfbanded Stargazer or Smooth-tip Sand Stargazer. To 5.2 cm (2 in) TL (Allen and Robertson 1994). Isla Guadalupe and vicinity of Punta Eugenia, central Baja California to Colombia, including Gulf of California, Islas Galápagos (Watson in Moser 1996), and other offshore islands (Robertson and Allen 2002). Depth: 0.6–137 m (2–449 ft) (min.: Personal communication: Scripps Institution of Oceanography Fish Collection, La Jolla, California; max.: Dawson 1977).