Helohyidae

Helohyidae is a group of artiodactyl mammals. They were most prominent in the mid-to-upper Eocene.

Helohyidae

R. Bruce Horsfall · Public Domain · 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
DichobunoideaPBDB
Diet
grazer, browserPBDB, for Artiodactyla
Life habit
ground dwellingPBDB, for Artiodactyla
Motility
actively mobilePBDB, for Osteichthyes
Environment
terrestrialPBDB, for Artiodactyla

Time the record covers

At least 8.1 million years on record.

The record covers at least 45.9 Mya to 37.71 Mya. No occurrence read is dated outside 56 Mya to 33.9 Mya.

Paleocene — about 0 of 77 occurrencesEocene — about 77 of 77 occurrencesEoceneOligocene — about 0 of 77 occurrences57–56 Mya — about 0.0 occurrences56–55 Mya — about 0.1 occurrences55–54 Mya — about 0.1 occurrences54–53 Mya — about 0.1 occurrences53–53 Mya — about 0.1 occurrences53–52 Mya — about 0.1 occurrences52–51 Mya — about 0.1 occurrences51–50 Mya — about 5 occurrences50–50 Mya — about 5 occurrences50–49 Mya — about 5 occurrences49–48 Mya — about 5 occurrences48–47 Mya — about 6 occurrences47–46 Mya — about 6 occurrences46–46 Mya — about 5 occurrences46–45 Mya — about 4 occurrences45–44 Mya — about 4 occurrences44–43 Mya — about 4 occurrences43–43 Mya — about 4 occurrences43–42 Mya — about 4 occurrences42–41 Mya — about 4 occurrences41–40 Mya — about 5 occurrences40–40 Mya — about 4 occurrences40–39 Mya — about 2 occurrences39–38 Mya — about 2 occurrences38–37 Mya — about 1.0 occurrences37–36 Mya — about 0.4 occurrences36–36 Mya — about 0.4 occurrences36–35 Mya — about 0.4 occurrences35–34 Mya — about 0.4 occurrences34–33 Mya — about 0.1 occurrences45.9 Mya37.71 Mya56.5 Mya33.4 Mya

77 occurrences of Helohyidae on record, most of them in the Eocene. 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

77 occurrences

These 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

18 formations

Bridger — 41.70°N, 109.00°WBridger — 41.20°N, 110.50°WBridger — 42.70°N, 110.10°WFriars — 32.90°N, 117.10°WUinta — 40.20°N, 109.90°WWashakie — 40.60°N, 108.10°WWashakie — 41.70°N, 109.00°WWashakie — 41.29°N, 108.11°WTepee Trail — 43.70°N, 108.70°WTepee Trail — 43.20°N, 108.20°WPondaung — 21.67°N, 94.82°EPondaung — 22.04°N, 94.49°EDevil's Graveyard — 29.20°N, 103.20°WLushi — 34.05°N, 111.03°EKhaychin — 43.72°N, 99.93°ELizhuan — 32.46°N, 114.05°EWagon Bed — 43.20°N, 108.20°WCanoe — 29.40°N, 103.13°WHedi — 35.03°N, 111.80°EHeti — 35.03°N, 111.80°EClarno — 44.93°N, 120.42°WShara Murum — 42.04°N, 111.53°EUlan Shireh — 42.52°N, 110.97°EDuchesne River — 40.10°N, 110.20°W

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The named rock units Helohyidae has been recovered from, largest first. Drawn where the rock is now, not where it formed. 5 occurrences have no formation on record, which is common for older literature.

Helohyidae and its relatives

Eocene

Where Helohyidae and its relatives were recorded in the Eocene.

Found in the same rock

539 taxa

The Paleobiology Database records 68 sites for Helohyidae, 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

33 references

Each of the 77 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. 21 further references are not listed. 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 Helohyidae

Credit
R. Bruce Horsfall
Licence
Public Domain
Commercial use
the licence allows it

No 3D scan of Helohyidae 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

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 itDichobunoidea through timeFormations of the EoceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Marsh 1877