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Was the ancestral panarthropod mouth ventral or terminal?
- Nielsen, Claus
- Arthropod structure & development 2019 v.49 pp. 152-154
- Tardigrada, adults, arthropods, fossils, mouth
- It has recently been suggested that the panarthropod mouth was ancestrally terminal, based on the assumption that the ancestral tardigrade had a terminal mouth and on the observations of a terminal mouth in adults of some stem-group fossils. This is shown to be unlikely, and it is concluded that the ancestral panarthropod had a ventral mouth.