| Janusiscus Temporal range:
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|---|---|
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Infraphylum: | Gnathostomata |
| Genus: | †Janusiscus Giles et al., 2015 |
| Species: | †J. schultzei
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| Binomial name | |
| †Janusiscus schultzei Giles et al., 2015
| |
Janusiscus schultzei is an extinct gnathostome vertebrate dating from the Early Devonian period in Siberia, approximately 415 million years ago. It may be the sister group of the last common ancestor of Chondrichthyes (cartilaginous fish) or Osteichthyes (bony fish). This makes J. schultzei a sister species to all living jawed vertebrates. The species name is in honor of Hans-Peter Schultze; the genus named after Janus, the Roman god of duality.[1]
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Giles, Sam; Friedman, Matt; Brazeau, Martin D. (2015-01-12). "Osteichthyan-like cranial conditions in an Early Devonian stem gnathostome". Nature. 520 (7545): 82–85. Bibcode:2015Natur.520...82G. doi:10.1038/nature14065. ISSN 1476-4687. PMC 5536226. PMID 25581798.
