Species of Quadrella

1. Quadrella boopsis Alcock, 1898 [type locality Bay of Bengal, Myanmar; geographical distribution: across most of Indo –West Pacific region except Hawaiian Islands] = Quadrella bispinosa Borradaile, 1902

2. Quadrella coronata Dana, 1852 [type locality Zulu Sea, Philippine Islands; geographical distribution: Indian Ocean, western Pacific Ocean] (Plate 4A) = Quadrella coronata var. granulosa Borradaile, 1902

3. Quadrella maculosa Alcock, 1898 [type locality Andaman Islands, Indian Ocean; geographical distribution: western and southeastern Pacific Ocean] = Quadrella cyrenae Ward, 1942

4. Quadrella nitida Smith, 1869 [type locality Pacific coast of Panamá; geographical distribution: Eastern Pacific region]

5. Quadrella reticulata Alcock, 1898 [type localities: Andaman Islands, Sri Lanka; geographical distribution: Indian Ocean, western Pacific Ocean]

6. Quadrella serenei Galil, 1986 [type locality Madagascar; geographic distribution: western and southeastern Pacific Ocean].

= Quadrella lewinsohni Galil, 1986