| ماع مسا | Convex reef crab |
| Language | English |
| Type | Vernacular |
| Official Trade Name | No |
| Rank | 3 - (Other common name) |
| Country | United States (contiguous states) |
| Locality | |
| عجرم | Bisby, F.A., M.A. Ruggiero, K.L. Wilson, M. Cachuela-Palacio, S.W. Kimani, Y.R. Roskov, A. Soulier-Perkins and J. van Hertum, 2005 |
| Life Stage | juveniles and adults |
| Sex | females and males |
| Core | behavior |
| 1st Modifier | habitat/ecology |
| 2nd Modifier | morphology |
| Remarks | 'crab' from Old English 'ceorfan', i.e., 'to curve'. |