| Haplognathia asymmetrica Sterrer, 1991b | 2 Jun 1986 | 1 m | fine white sand with detritus | sample H5: about 10 m off the northeast-facing beach of Coconut Island, between beach and coral reef |
| Haplognathia ruberrima (Sterrer, 1966) | 2 Jun 1986 | 1 m | fine white sand with detritus | sample H5: about 10 m off the northeast-facing beach of Coconut Island, between beach and coral reef |
| Haplognathia rufa Sterrer, 1991b | 2 Jun 1986 | 1 m | | sample H5: about 10 m off the northeast-facing beach of Coconut Island, between beach and coral reef |
| Cosmognathia arcus Sterrer, 1991a | 2 Jun 1986 | 1 m | fine white sand with detritus | sample H5: about 10 m off the northeast-facing beach of Coconut Island, between beach and coral reef |
| Cosmognathia manubrium Sterrer, 1991b | 2 Jun 1986 | 1 m | fine white sand with detritus | sample H5: about 10 m off the northeast-facing beach of Coconut Island, between beach and coral reef |
| Pterognathia ctenifera Sterrer, 1970a | 2 Jun 1986 | 1 m | fine white sand with detritus | sample H5: about 10 m off the northeast-facing beach of Coconut Island, between beach and coral reef |
| Pterognathia hawaiiensis Sterrer, 1991b | 2 Jun 1986 | 1 m | fine white sand with detritus | sample H5: about 10 m off the northeast-facing beach of Coconut Island, between beach and coral reef |
| Austrognathia novaezelandiae Sterrer, 1991a | 2 Jun 1986 | 1 m | fine white sand with detritus | sample H5: about 10 m off the northeast-facing beach of Coconut Island, between beach and coral reef |