Sixgill sawshark
The sixgill sawshark, Pliotrema warreni is a sawshark of the family Pristiophoridae. Presence of 6 pairs of gill slits highlights this genus among sharks; outside Hexanchiformes order, Pliotrema is the only shark with more than 5 gill slits. Unlike other sawsharks, the barbs on this shark's rostrum continue onto the sides of the head. Its barbels are also closer to its mouth than in other species. At maximum, females can reach over 136 cm long, and males can reach over 112 cm long.
| Sixgill sawshark Temporal range: Miocene to Present | |
|---|---|
| Scientific classification | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Chondrichthyes |
| Subclass: | Elasmobranchii |
| Subdivision: | Selachimorpha |
| Order: | Pristiophoriformes |
| Family: | Pristiophoridae |
| Genus: | Pliotrema Regan, 1906 |
| Species: | P. warreni |
| Binomial name | |
| Pliotrema warreni Regan, 1906 | |
| Range of sixgill sawshark shark (in blue) | |
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