Fukangichthys longidorsalis is a scanilepiform whose CT-informed analysis placed it on the polypterid stem; that placement is a sampled topology, not direct ancestry.
claim:taxon:fukangichthys:taxonomyFukangichthys longidorsalis
A Middle Triassic scanilepiform whose revised anatomy and CT-informed phylogenetic placement materially changed one estimate of the living ray-fin crown minimum.
Represented range247–241.464 Ma
Content packageactinopterygii
PBDBtxn:265927
Evidence boundary
Automated checks cover structure, identifiers, translations and links only; maintainer and external expert review are not complete.
Claim ledger
The named Fukangichthys specimens come from the Middle Triassic Kelamayi Formation of Xinjiang, China; this sample does not establish global distribution.
claim:taxon:fukangichthys:biogeographyThe cited studies focus on anatomy and topology and do not directly establish diet, habitat preference, swimming performance or trophic guild.
claim:taxon:fukangichthys:ecologyCT and comparative anatomy of IVPP V4096.6 and IVPP V4096.13 supply endoskeletal and external characters used to revise scanilepiform placement.
claim:taxon:fukangichthys:morphologyThe displayed 247–241.464 Ma interval is a Middle Triassic Kelamayi Formation envelope and is separate from the topology-dependent crown-actinopterygian calibration.
claim:taxon:fukangichthys:fossil-rangeKnown limits
- A missing branch or fossil occurrence does not imply biological absence. Internal nodes are not calibrated divergence estimates.
References
- Early members of ‘living fossil’ lineage imply later origin of modern ray-finned fishesGiles, S.; Xu, G.-H.; Near, T.J.; Friedman, M. · 2017 · DOI 10.1038/nature23654
- A revision of the Middle Triassic scanilepiform fish Fukangichthys longidorsalis from Xinjiang, China, with comments on the phylogeny of the ActinopteriXu, G.-H.; Gao, K.-Q.; Finarelli, J.A. · 2014 · DOI 10.1080/02724634.2014.837053
- Open Tree of Life web servicesOpenTreeOfLife Project
- The Paleobiology Database application programming interfacePeters, S.E.; McClennen, M. · 2016 · DOI 10.1017/pab.2015.39
- Denormalized occurrence and taxon tables of the Paleobiology DatabaseThe Paleobiology Database Community; Kocsis, Á.T. · 2026 · DOI 10.5281/zenodo.21620933