| Agnathiella beckeri Sterrer, 1971d | 29 Dec 1968 | 3 m | clean fine sand with ripple marks at the base of a coral reef; short seagrrass nearby | About one mile SW of Big Pine Key |
| Nanognathia exigua Sterrer, 1973a | 29 Dec 1968 | 3 m | clean fine sand with ripple marks at the base of a coral reef; short seagrass nearby | |
| Nanognathia exigua Sterrer, 1973a | 29 Dec 1968 | 0.5 m | clean coarse sand | |
| Nanognathia exigua f. typica Sterrer, 1973a | 29 Dec 1968 | 3 m | clean fine sand with ripple marks at the base of a coral reef; short seagrass nearby | |
| Onychognathia filifera Riedl, 1971a | 29 Dec 1968 | 3 m | fine sand | sample F14 |
| Onychognathia filifera Riedl, 1971a | 29 Dec 1968 | 0.5 m | clean coarse sand | sample F15 |
| Austrognatharia strunki Farris, 1973 | Apr 1972 | 1 m | coarse-shelly sand | calcareous sand spit off C.I.T. Island, Newfound Harbor Channel |
| Haplognathia ruberrima (Sterrer, 1966) | 29 Dec 1968 | 0.5 m | clean coarse sand | sample F15 |
| Agnathiella beckeri Sterrer, 1971d | 29 Dec 1968 | 0.5 m | clean coarse sand | sample F15 |
| Tenuignathia rikerae Sterrer, 1976 | 29 Dec 1968 | 0.5 m | clean coarse sand | sample F15 |
| Vampyrognathia horribilis Sterrer, 1998 | 29 Dec 1968 | 0.5 m | clean coarse sand | sample F15 |
| Nanognathia exigua Sterrer, 1973a | 29 Dec 1968 | 3 m | fine sand | sample F14 |
| Nanognathia exigua Sterrer, 1973a | 29 Dec 1968 | 0.5 m | clean coarse sand | sample F15 |
| Gnathostomula axi Kirsteuer, 1964 | 29 Dec 1968 | 3 m | fine sand with detritus | sample F14 |
| Austrognathia christianae Farris, 1977 | 29 Dec 1968 | 3 m | fine sand | sample F14 |
| Austrognathia christianae Farris, 1977 | 29 Dec 1968 | 0.5 m | clean coarse sand | sample F15 |
| Austrognatharia medusifera Sterrer, 1998 | 29 Dec 1968 | 0.5 m | clean coarse sand | sample F15 |
| Austrognatharia stirialis Sterrer, 1998 | 29 Dec 1968 | 0.5 m | clean coarse sand | sample F15 |
| Austrognatharia strunki Farris, 1973 | 29 Dec 1968 | 3 m | fine sand | sample F14 |