Hormotoma gracilis

Hormotoma gracilis

via iDigBio · CC0 · via iDigBio. 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
HormotomaPBDB
Diet
herbivorePBDB, for Hormotoma
Life habit
epifaunalPBDB, for Hormotoma
Motility
actively mobilePBDB, for Hormotoma
Vision
limitedPBDB, for Murchisoniina
Environment
coastal,marinePBDB, for Murchisoniina

Time the record covers

At least 31 million years on record.

The record covers at least 477.1 Mya to 445.5 Mya. No occurrence read is dated outside 481.1 Mya to 443.1 Mya.

Ordovician — about 128 of 128 occurrencesOrdovicianSilurian — about 0 of 128 occurrences482–481 Mya — about 0.1 occurrences481–479 Mya — about 0.3 occurrences479–478 Mya — about 0.3 occurrences478–477 Mya — about 0.2 occurrences459–458 Mya — about 0.1 occurrences458–457 Mya — about 7 occurrences457–456 Mya — about 18 occurrences456–454 Mya — about 18 occurrences454–453 Mya — about 17 occurrences453–452 Mya — about 16 occurrences452–450 Mya — about 24 occurrences450–449 Mya — about 14 occurrences449–448 Mya — about 4 occurrences448–446 Mya — about 4 occurrences446–445 Mya — about 3 occurrences445–444 Mya — about 1 occurrence444–442 Mya — about 0.5 occurrences477.1 Mya445.5 Mya481.9 Mya442.3 Mya

128 occurrences of Hormotoma gracilis on record, most of them in the Ordovician. 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

128 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

48 formations

Dunleith — 42.00°N, 90.50°WVerulam — 44.60°N, 78.97°WVerulam — 44.45°N, 78.70°WVerulam — 44.52°N, 78.97°WVerulam — 44.43°N, 78.78°WVerulam — 44.48°N, 78.95°WVerulam — 45.42°N, 75.72°WChaumont — 45.88°N, 76.93°WChaumont — 45.52°N, 73.58°WChaumont — 45.41°N, 75.73°WChaumont — 45.50°N, 76.56°WChaumont — 45.57°N, 74.93°WChaumont — 45.03°N, 74.83°WChaumont — 45.47°N, 74.81°WPlatteville — 43.00°N, 91.16°WPlatteville — 46.00°N, 94.00°WPlatteville — 43.30°N, 91.78°WPlatteville — 42.51°N, 89.03°WSt. Peter Sandstone — 44.92°N, 93.02°WSt. Peter Sandstone — 43.73°N, 92.13°WSt. Peter Sandstone — 46.00°N, 94.00°WSt. Peter Sandstone — 42.00°N, 90.50°WBobcaygeon — 44.67°N, 78.80°WBobcaygeon — 44.53°N, 78.55°WBobcaygeon — 45.88°N, 76.93°WGlenwood — 46.00°N, 94.00°WGlenwood — 42.00°N, 90.50°WDenley Limestone — 43.88°N, 75.49°WCummingsville — 44.50°N, 92.90°WCummingsville — 46.00°N, 94.00°WWise Lake — 42.00°N, 90.50°WScales Shale — 42.00°N, 90.50°WScales Shale — 43.02°N, 91.73°WStonington — 45.67°N, 86.97°WStonington — 45.67°N, 86.93°WVaureal — 49.92°N, 64.33°WVaureal — 49.67°N, 62.92°WVaureal — 49.91°N, 64.21°WVauréal — 49.92°N, 64.33°WVauréal — 49.93°N, 64.13°WMcGregor — 42.81°N, 89.64°WMcGregor — 40.78°N, 87.39°WCarters Limestone — 35.50°N, 86.50°WCarters Limestone — 35.62°N, 86.97°WDecorah Shale — 46.00°N, 94.00°WDecorah Shale — 44.50°N, 92.90°WProsser Limestone — 46.00°N, 94.00°WStewartville — 46.00°N, 94.00°WDubuque — 46.00°N, 94.00°WDubuque — 42.00°N, 90.50°WMaquoketa — 46.00°N, 94.00°WPecatonica — 42.00°N, 90.50°WMifflin — 42.00°N, 90.50°WIon — 42.00°N, 90.50°W

Loading coastlines…

The named rock units Hormotoma gracilis has been recovered from, largest first. Drawn where the rock is now, not where it formed. 24 further formations hold fewer occurrences each and are not listed. 7 occurrences have no formation on record, which is common for older literature.

Hormotoma gracilis and its relatives

Ordovician

Where Hormotoma gracilis and its relatives were recorded in the Ordovician.

Found in the same rock

803 taxa

The Paleobiology Database records 114 sites for Hormotoma gracilis, 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

26 references

Each of the 128 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. 14 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 Hormotoma gracilis

Source
iDigBio
Credit
via iDigBio
Licence
CC0
Commercial use
the licence allows it

No 3D scan of Hormotoma gracilis 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.

This is what the site found, which is not the same as what exists.

Keep going

What may have been alongside itHormotoma through timeFormations of the OrdovicianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. (Hall 1847)