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Clicking on a marker will show information available about the collection site. (Compare with corresponding letter in table.)
| site | collection date | depth | substrate | salin | locality kind | comments | reference | |
|---|---|---|---|---|---|---|---|---|
| A | off coast Beaufort, North Carolina, USA | May 1970 | 20 m | heterogeneous coarse sand, fairly clean | type locality | specimens obtained there showed seveal differences in measurement and probably represent a different geographic form. | Rieger RM (1974) 58 |