| Rebellatrix | |
|---|---|
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| Artist's reconstruction | |
Scientific classification | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Clade: | Sarcopterygii |
| Class: | Actinistia |
| Order: | Coelacanthiformes |
| Family: | †Rebellatricidae Wendruff &Wilson,2012 |
| Genus: | †Rebellatrix Wendruff & Wilson, 2012 |
| Type species | |
| Rebellatrix divaricerca Wendruff & Wilson, 2012 | |
Rebellatrix divaricerca ("rebel coelacanth (with a) forked tail", after the unique tail fin) is a largeprehistoriccoelacanth from theLower TriassicSulphur Mountain formation andWapiti Lake Provincial Park ofBritish Columbia. It isthe only known species of the familyRebellatricidae.R. divaricerca's most distinguishing feature was itstuna-like forked tail (unusual for anactinistian fish), which suggested a fast-swimming and active lifestyle, unlike coelacanths related to the living species.[2]
PRPRC 2006.10.001, theholotype specimen, is a nearly complete fossil, with the exception of some fins and a large amount of the skull, as well as an incomplete tail fin. Three other specimens reveal the rest of the tail. Most specimens at the Tumbler Ridge Museum inTumbler Ridge, with one at theRoyal Tyrrell Museum of Palaeontology.
Rebellatrix may have reached 1.30 metres (4 ft 3 in) in length. In addition to its uniquely forked (and symmetrical) tail fin, the posteriordorsal fin is behind theanal fin rather than opposite it.Rebellatrix is believed to have been a fast-swimming predator, since its tail is clearly built for speed, and modern coelacanths only use the tail fin when attacking prey, and would have been one of the first non-sharks to fill this niche.[2]
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