| Largetooth sawfish | |
|---|---|
| Conservation status | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Chondrichthyes |
| Subclass: | Elasmobranchii |
| Order: | Pristiformes |
| Family: | Pristidae |
| Genus: | Pristis |
| Species: | P. microdon |
| Binomial name | |
| Pristis microdon Latham, 1794 |
|
The largetooth sawfish (Pristis microdon), also known as the Leichhardt's sawfish or freshwater sawfish, is a sawfish of the family Pristidae, found in shallow Indo-West Pacific oceans between latitudes 11° N and 39° S. As its relatives, it also enters freshwater. This critically endangered species reaches a length of up to 7 metres (23 ft). Reproduction is ovoviviparous.
Considerable taxonomic confusion surrounds this species. It is part of the Pristis pristis species complex, which also includes P. perotteti. P. microdon has sometimes been considered synonymous with P. perotteti, and uncertainty exists over what species the scientific name P. microdon really belong to (the original description lacked a type locality).
The largetooth sawfish is a heavy-bodied sawfish with a short massive saw which is broad-based, strongly tapering and with 14 to 22 very large teeth on each side - the space between the last two saw-teeth on the sides are less than twice the space between the first two teeth. The pectoral fins are high and angular, the first dorsal fin being mostly in front of the pelvic fins, and the caudal fin has a pronounced lower lobe.