Heptagenia
Heptagenia is a genus of flatheaded mayflies in the family Heptageniidae. There are at least 20 described species in Heptagenia.
NobbiP · CC BY-SA 3.0 · via Wikipedia/Commons. May be a photograph of a specimen, or an artist’s reconstruction — an interpretation of a skeleton, since colour and soft tissue are almost never preserved.
On record
Recorded, not inferred- Sits inside
- HeptageniinaePBDB
- Motility
- actively mobilePBDB, for Arthropoda
- Environment
- terrestrialPBDB, for Insecta
Time the record covers
At least 13 million years on record.
The record covers at least 33.9 Mya to 20.45 Mya. No occurrence read is dated outside 37.71 Mya to 15.98 Mya.
10 occurrences of Heptagenia on record. The Paleobiology Database records this as a living group, and the chart stops with its fossils rather than at the present. Bar height is expected occurrences, not a count: each fossil is spread across the span it is dated to, so a tall narrow bar means tight dating and a low wide one means loose.
When
10 occurrencesThese are dates about fossils, not the animal: the record can only begin after it arose and end before it died out, so either end may reach further. Shares are expected occurrences: a fossil dated to a span is counted partly in each period it straddles. More on what this infers.
Found in
1 formation
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The named rock units Heptagenia has been recovered from, largest first. Drawn where the rock is now, not where it formed. 6 occurrences have no formation on record, which is common for older literature.
Found in the same rock
519 taxa- Calosoma maderae4 sites
- Camponotites shanwangensis4 sites
- Hylobius plenus4 sites
- Limois shanwangensis4 sites
- Anomala furva3 sites
- Cerambycidae3 sites
- Chlaenius furvus3 sites
- Dascillus shandongianus3 sites
- Gerstaeckerus alviolatus3 sites
- Ablator triguttatus2 sites
- Allodahlia shanwangensis2 sites
- Anomala2 sites
- Aphaena lithoecia2 sites
- Apis (Synapis) miocenica2 sites
- Archaea paradoxa2 sites
- Balticoroma serafinorum2 sites
- Bibio cratopodus2 sites
- Bibio expansus2 sites
- Bibio shanwangensis2 sites
- Bibio tranopterus2 sites
- Bibio varineurus2 sites
- Bibio ventricosus2 sites
- Camponotites ambon2 sites
- Camponotites microthoracus2 sites
The Paleobiology Database records 8 sites for Heptagenia, and this reads all of them. The number is how many of those sites it was catalogued from too. The 24 sharing the most are listed.
This is not a list of everything alive at the time. It is only what has come out of the same ground as this animal and been written down.
Entered from
4 references- Deuxième contribution à la connaissance des Éphéméroptères de l'ambre oligocène de la Baltique5
- Zhang, 19893
- Fossil insects in the diatoms of Shanwang1
- Troisième contribution à la connaissance des Éphéméroptères de l'ambre Oligocène de la Baltique1
Each of the 10 occurrences read was entered from one of these publications, ordered by how many each accounts for. This is not a search for papers mentioning the name. Entries link to doi.org where the Paleobiology Database holds an identifier, and to its own record where it does not. Relayed as the Paleobiology Database holds them, not checked against what they resolve to.
Media and terms
Media content1
Picture of Heptagenia
- Source
- Wikipedia/Commons
- Credit
- NobbiP
- Licence
- CC BY-SA 3.0
- Commercial use
- the licence allows it
No 3D scan of Heptagenia was found in Sketchfab.
Smithsonian Open Access and MorphoSource were not reached for this taxon, so this list is what the others held rather than everything there is.
The description on this site
- Source
- Wikipedia, “Heptagenia”
- Licence
- CC BY-SA 4.0
This is what the site found, which is not the same as what exists.
Keep going
What may have been alongside itHeptageniinae through timeThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Walsh 1863