Hormotoma

Searched as Hormotoma sp.. The Paleobiology Database treats Hormotoma as the accepted name.

Hormotoma

James St. John · CC BY 2.0 · 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 89 million years on record.

The record covers at least 483.4 Mya to 393.47 Mya. No occurrence read is dated outside 486.85 Mya to 382.31 Mya.

Cambrian — about 0 of 641 occurrencesOrdovician — about 497 of 641 occurrencesOrdovicianSilurian — about 139 of 641 occurrencesSilurianDevonian — about 5 of 641 occurrencesDevonian489–485 Mya — about 3 occurrences485–482 Mya — about 14 occurrences482–478 Mya — about 24 occurrences478–474 Mya — about 27 occurrences474–471 Mya — about 27 occurrences471–467 Mya — about 8 occurrences467–464 Mya — about 4 occurrences464–460 Mya — about 5 occurrences460–456 Mya — about 44 occurrences456–453 Mya — about 133 occurrences453–449 Mya — about 163 occurrences449–445 Mya — about 33 occurrences445–442 Mya — about 20 occurrences442–438 Mya — about 24 occurrences438–435 Mya — about 21 occurrences435–431 Mya — about 20 occurrences431–427 Mya — about 19 occurrences427–424 Mya — about 23 occurrences424–420 Mya — about 20 occurrences420–416 Mya — about 2 occurrences413–409 Mya — about 0.2 occurrences409–406 Mya — about 0.4 occurrences406–402 Mya — about 0.4 occurrences402–398 Mya — about 0.4 occurrences398–395 Mya — about 0.4 occurrences395–391 Mya — about 1 occurrence391–387 Mya — about 1 occurrence387–384 Mya — about 0.3 occurrences384–380 Mya — about 0.1 occurrences483.4 Mya393.47 Mya489 Mya380 Mya

641 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

641 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

178 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°WVerulam — 44.75°N, 79.33°WVerulam — 44.60°N, 78.97°WVerulam — 44.50°N, 78.58°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°WDunleith — 42.00°N, 90.50°WChaumont — 45.45°N, 76.69°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 — 45.62°N, 74.69°WChaumont — 45.03°N, 74.83°WChaumont — 45.47°N, 74.81°WChaumont — 45.33°N, 75.72°WRead Bay — 73.25°N, 93.50°WRead Bay — 74.84°N, 93.51°WRead Bay — 74.68°N, 94.16°WRead Bay — 74.70°N, 94.82°WRead Bay — 74.84°N, 93.43°WBobcaygeon — 44.67°N, 78.80°WBobcaygeon — 44.53°N, 78.55°WBobcaygeon — 45.88°N, 76.93°WBobcaygeon — 45.54°N, 75.29°WBobcaygeon — 44.58°N, 79.09°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°WWise Lake — 42.00°N, 90.50°WLindsay — 45.50°N, 81.00°WLindsay — 44.58°N, 78.98°WLexington Limestone — 38.00°N, 84.67°WLexington Limestone — 38.20°N, 84.89°WLexington Limestone — 38.07°N, 84.52°WLexington Limestone — 38.17°N, 84.84°WLexington Limestone — 37.67°N, 84.94°WLexington Limestone — 38.35°N, 84.31°WLexington Limestone — 37.75°N, 84.77°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°WMcKenzie — 39.65°N, 78.76°WMcKenzie — 39.57°N, 78.84°WMcKenzie — 39.44°N, 78.97°WTonoloway Limstone — 39.63°N, 78.23°WTonoloway Limstone — 39.57°N, 78.84°WTonoloway Limstone — 39.44°N, 78.97°WHull — 45.43°N, 75.72°WHull — 45.26°N, 72.80°WHull — 45.54°N, 75.00°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°WBrassfield — 38.79°N, 83.55°WBrassfield — 39.34°N, 85.48°WBrassfield — 37.63°N, 84.16°WBrassfield — 39.88°N, 84.33°WWilliamson Shale — 43.22°N, 77.19°WWilliamson Shale — 43.00°N, 78.00°WWilliamson Shale — 43.00°N, 77.00°WWilliamson Shale — 43.00°N, 76.00°WWilliamson Shale — 43.00°N, 75.00°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°WEllis Bay — 49.82°N, 64.35°WEllis Bay — 49.42°N, 62.25°W

Loading coastlines…

The named rock units Hormotoma has been recovered from, largest first. Drawn where the rock is now, not where it formed. 154 further formations hold fewer occurrences each and are not listed. 50 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

134 references

Each of the 641 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. 122 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
James St. John
Licence
CC BY 2.0
Commercial use
the licence allows it

No 3D scan of Hormotoma 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 itHormotomidae through timeFormations of the OrdovicianThe world it lived on

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