| Common name | Pa pak |
| Language | Laotian |
| Type | Vernacular |
| Official trade name | No |
| Rank | 2 - (Preferred common name (unique)) |
| Country | Lao |
| Locality | |
| Ref. | Taki, Y., 1974 |
| Life stage | juveniles and adults |
| Sex | females and males |
| Core | |
| 1st modifier | |
| 2nd modifier | |
| Remarks | Pak means mouth. Although the mouth is of normal size, it expands outwards remarkably if a finger is inserted into it and pulled. |