| Common name | João-duro |
| Language | Portuguese |
| Dialect | Brazilianism |
| Type | Vernacular |
| Official trade name | No |
| Rank | 3 - (Other common name) |
| Country | Brazil |
| Locality | |
| Ref. | Martins-Juras, I.A.G., A.A. Juras and N.M. Menezes, 1987 |
| Life stage | juveniles and adults |
| Sex | females and males |
| Core | person (eponym) |
| 1st modifier | morphology |
| 2nd modifier | |
| Remarks | João = Brazilian common name + duro = hard |