Hormotoma

Hormotoma

Uncredited · via Wikidata/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
HormotomidaePBDB
Diet
herbivorePBDB
Life habit
epifaunalPBDB
Motility
actively mobilePBDB
Vision
limitedPBDB, for Murchisoniina
Environment
coastal,marinePBDB, for Murchisoniina

Time the record covers

At least 88 million years on record.

The record covers at least 481.7 Mya to 393.47 Mya. No occurrence read is dated outside 486.85 Mya to 382.31 Mya.

Cambrian — about 0 of 497 occurrencesOrdovician — about 423 of 497 occurrencesOrdovicianSilurian — about 73 of 497 occurrencesSilurianDevonian — about 1 of 497 occurrencesDevonian489–485 Mya — about 1 occurrence485–482 Mya — about 15 occurrences482–478 Mya — about 28 occurrences478–474 Mya — about 30 occurrences474–471 Mya — about 28 occurrences471–467 Mya — about 7 occurrences467–464 Mya — about 4 occurrences464–460 Mya — about 4 occurrences460–456 Mya — about 32 occurrences456–453 Mya — about 91 occurrences453–449 Mya — about 130 occurrences449–445 Mya — about 39 occurrences445–442 Mya — about 18 occurrences442–438 Mya — about 14 occurrences438–435 Mya — about 13 occurrences435–431 Mya — about 13 occurrences431–427 Mya — about 8 occurrences427–424 Mya — about 8 occurrences424–420 Mya — about 11 occurrences420–416 Mya — about 2 occurrences395–391 Mya — about 0.2 occurrences391–387 Mya — about 0.3 occurrences387–384 Mya — about 0.3 occurrences384–380 Mya — about 0.1 occurrences481.7 Mya393.47 Mya489 Mya380 Mya

497 occurrences of Hormotoma 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

497 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

176 formations

Smithville — 33.25°N, 92.57°WSmithville — 37.33°N, 89.90°WSmithville — 37.30°N, 89.96°WSmithville — 37.41°N, 89.87°WSmithville — 37.29°N, 89.83°WSmithville — 37.21°N, 89.85°WSmithville — 37.16°N, 89.81°WSmithville — 36.11°N, 91.30°WDunleith — 42.00°N, 90.50°WDunleith — 42.42°N, 90.43°WVerulam — 44.75°N, 79.33°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°WWise Lake — 42.00°N, 90.50°WBobcaygeon — 44.67°N, 78.80°WBobcaygeon — 44.53°N, 78.55°WBobcaygeon — 45.88°N, 76.93°WBobcaygeon — 44.58°N, 79.09°WSt. Peter Sandstone — 44.98°N, 93.26°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°WCedar Lake Dolomite — 51.58°N, 98.83°WCedar Lake Dolomite — 53.14°N, 99.45°WCedar Lake Dolomite — 53.18°N, 99.27°WCedar Lake Dolomite — 53.25°N, 99.50°WCedar Lake Dolomite — 51.75°N, 98.58°WCedar Lake Dolomite — 51.08°N, 97.62°WMaquoketa — 42.01°N, 91.64°WMaquoketa — 43.28°N, 91.37°WMaquoketa — 46.00°N, 94.00°WKope — 39.00°N, 84.00°WKope — 39.01°N, 84.53°WPlatteville — 43.00°N, 91.16°WPlatteville — 46.00°N, 94.00°WPlatteville — 43.30°N, 91.78°WPlatteville — 42.51°N, 89.03°WDenley Limestone — 43.21°N, 75.46°WDenley Limestone — 43.88°N, 75.49°WCummingsville — 44.00°N, 92.45°WCummingsville — 44.50°N, 92.90°WCummingsville — 46.00°N, 94.00°WDubuque — 46.00°N, 94.00°WDubuque — 42.00°N, 90.50°WEllis Bay — 49.82°N, 64.35°WEllis Bay — 49.42°N, 62.25°WStewartville — 46.00°N, 94.00°WScales Shale — 42.00°N, 90.50°WScales Shale — 43.02°N, 91.73°WCliffield — 37.15°N, 81.49°WCliffield — 37.13°N, 81.41°WCliffield — 37.08°N, 81.33°WBigby-Cannon Limestone — 35.50°N, 86.50°WGlenwood — 46.00°N, 94.00°WGlenwood — 42.00°N, 90.50°WProsser Limestone — 46.00°N, 94.00°WXia Majiagou — 40.00°N, 118.00°EXia Majiagou — 39.00°N, 118.00°EXia Majiagou — 36.00°N, 114.00°EXia Majiagou — 38.00°N, 113.00°ELindsay — 45.50°N, 81.00°WLindsay — 44.58°N, 78.98°WBad Cache Rapids — 66.78°N, 83.90°WBad Cache Rapids — 68.90°N, 82.03°WBad Cache Rapids — 68.71°N, 81.94°WBad Cache Rapids — 69.00°N, 81.67°W

Loading coastlines…

The named rock units Hormotoma has been recovered from, largest first. Drawn where the rock is now, not where it formed. 152 further formations hold fewer occurrences each and are not listed. 43 occurrences have no formation on record, which is common for older literature.

Hormotoma and its relatives

Ordovician

Where Hormotoma and its relatives were recorded in the Ordovician.

Found in the same rock

1,737 taxa

The Paleobiology Database records 381 sites for Hormotoma, and this reads 240 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

138 references

Each of the 497 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. 126 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

Credit
nobody named on the record
Licence
not stated by the source
Commercial use
cannot be read from the licence given — check the record

No 3D scan was found. Smithsonian Open Access, MorphoSource and Sketchfab were all searched.

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

Keep going

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

Occurrence data from the Paleobiology Database, CC BY 4.0. (Salter 1859)