Table 1. Hapalops specimens examined for this study.
The names of museums are represented by the following acronyms: American Museum of Natural History (AMNH), Field Museum of Natural History (FMNH) and University of Kansas Natural History Museum (KU).
| Museum | Genus and species name | Specimen number | Elements examined |
|---|---|---|---|
| AMNH | Hapalops brachycephalis | 9176 | Skull |
| AMNH | Hapalops rectangularis | 9222 | Mandible |
| FMNH | Hapalops reutmeyeri | P13141 | Skull |
| FMNH | Hapalops elongatus | P13138 | Skull |
| FMNH | Hapalops elongatus | P13145 | Skull |
| FMNH | Hapalops elongatus | P13133 | Skull and mandible |
| FMNH | Hapalops elongates | P13121 | Mandible |
| FMNH | Hapalops sp. | P13278 | Skull |
| FMNH | Hapalops sp. | P13122 | Skull and mandible |
| FMNH | Hapalops sp. | P13136 | Mandible |
| FMNH | Hapalops reutmeyeri | P13130 | Mandible |
| FMNH | Hapalops longiplatus | P13143 | Mandible |
| KU | Hapalops reutmeyeri | KU 145120 | Skull and mandible |
| YPM | Hapalops longiceps | 15523 | Skull and mandible |