Stratum.black
Heliobatis radians — Heliobatis radians Marsh
Heliobatis radians Marsh — Smithsonian Institution (NMNHPALEO), Smithsonian Open Access, CC0

Shark / ray

Heliobatis radians

Freshwater stingray

Heliobatis radians is the Fossil Lake stingray, a disc up to 30 cm across with a long whip tail and, in males, claspers. Complete rays are among the most sought-after Green River fossils and sell for thousands. The cartilage skeleton is delicate and rays are often heavily stabilised; ask whether the tail is original and continuous.

PhylumChordata
ClassChondrichthyes
OrderMyliobatiformes
FamilyDasyatidae
GroupShark / ray
Rank (PBDB)genus· Paleobiology Database
Accepted name (PBDB)Dasyatis· Paleobiology Database
Classification (PBDB)Chordata › Chondrichthyes › Myliobatiformes › Dasyatidae· Paleobiology Database
Range (PBDB)133–0 Ma· Paleobiology Database
PBDB occurrences409· Paleobiology Database

Photographs

Heliobatis radians — Heliobatis radians Marsh, 1877 (NHMUK PV P 26800)
Heliobatis radians Marsh, 1877 (NHMUK PV P 26800) — © The Trustees of the Natural History Museum, London, Natural History Museum (London) Data Portal, CC BY 4.0

Age

Formations

Elsewhere

Cite this article

Stratum Study. "Heliobatis radians" (Taxon). Stratum Study pack 2026.09, as of 2026-09-19. https://stratum.black/study/taxa/heliobatis-radians. Accessed 2026-09-20.

BibTeX · CSL-JSON

@misc{stratum-heliobatis-radians,
  title        = {Heliobatis radians},
  author       = {{Stratum Study}},
  howpublished = {\url{https://stratum.black/study/taxa/heliobatis-radians}},
  year         = {2026},
  note         = {Taxon article, Stratum Study pack 2026.09, as of 2026-09-19; sources: stratum, pbdb, wikidata, smithsonian, nhm. Accessed 2026-09-20.}
}

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