Homotrypa

Homotrypa is an extinct genus of bryozoans from the Ordovician and Silurian periods, known from fossils found in the United States. Its colonies are branch-like and have small monticules made of groups of three or four larger zooecia slightly protruding out from the main surface of the colony. In cross section, the zooecia are erect in axis and gently curve toward the surface of the colony.

Homotrypa

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
MonticuliporidaePBDB
Diet
suspension feederPBDB, for Stenolaemata
Life habit
epifaunalPBDB, for Bryozoa
Motility
stationary, attachedPBDB, for Stenolaemata
Vision
blindPBDB, for Stenolaemata
Environment
marinePBDB, for Lophophorata

Time the record covers

At least 25 million years on record.

The record covers at least 458.2 Mya to 432.9 Mya. No occurrence read is dated outside 471.3 Mya to 426.7 Mya.

Ordovician — about 193 of 204 occurrencesOrdovicianSilurian — about 11 of 204 occurrencesSilurian472–471 Mya — about 0.1 occurrences471–469 Mya — about 0.1 occurrences469–468 Mya — about 0.1 occurrences468–466 Mya — about 0.1 occurrences466–464 Mya — about 0.1 occurrences464–463 Mya — about 0.1 occurrences463–461 Mya — about 0.1 occurrences461–460 Mya — about 0.6 occurrences460–458 Mya — about 0.7 occurrences458–457 Mya — about 22 occurrences457–455 Mya — about 26 occurrences455–454 Mya — about 27 occurrences454–452 Mya — about 32 occurrences452–451 Mya — about 32 occurrences451–449 Mya — about 27 occurrences449–447 Mya — about 10 occurrences447–446 Mya — about 10 occurrences446–444 Mya — about 4 occurrences444–443 Mya — about 2 occurrences443–441 Mya — about 1 occurrence441–440 Mya — about 2 occurrences440–438 Mya — about 2 occurrences438–437 Mya — about 0.3 occurrences437–435 Mya — about 0.3 occurrences435–434 Mya — about 0.3 occurrences434–432 Mya — about 0.8 occurrences432–430 Mya — about 1 occurrence430–429 Mya — about 1 occurrence429–427 Mya — about 1 occurrence427–426 Mya — about 0.5 occurrences458.2 Mya432.9 Mya472.2 Mya425.8 Mya

204 occurrences of Homotrypa 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

204 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

56 formations

Hermitage — 36.00°N, 83.00°WHermitage — 36.25°N, 83.97°WHermitage — 36.82°N, 84.52°WHermitage — 35.77°N, 85.01°WHermitage — 35.49°N, 85.26°WWaynesville — 39.00°N, 84.00°WWaynesville — 41.00°N, 86.69°WLexington Limestone — 38.00°N, 85.00°WLexington Limestone — 38.00°N, 84.67°WBromide — 34.00°N, 97.00°WBromide — 34.48°N, 96.97°WFossil Hill Limestone — 33.00°S, 149.00°EFossil Hill Limestone — 34.00°S, 149.00°EFossil Hill Limestone — 34.00°S, 148.00°EDecorah Shale — 42.50°N, 91.25°WDecorah Shale — 44.50°N, 92.90°WDecorah Shale — 44.95°N, 93.07°WGuttenberg — 42.50°N, 91.25°WKhkoma — 67.04°N, 103.77°EWhitewater — 39.83°N, 84.89°WWhitewater — 39.42°N, 85.01°WWhitewater — 39.00°N, 84.00°WWhitewater — 38.00°N, 85.50°WCatheys — 35.50°N, 86.50°WQuimbys Mill — 42.50°N, 91.25°WVerulam — 44.60°N, 78.97°WVerulam — 44.50°N, 78.58°WVerulam — 44.52°N, 78.97°WVerulam — 44.43°N, 78.78°WKhaastyrka — 67.35°N, 104.04°EKhaastyrka — 67.32°N, 103.85°EKhaastyrka — 67.33°N, 104.85°EKhaastyrka — 67.34°N, 103.88°EKope — 39.00°N, 84.00°WFairview — 39.00°N, 84.00°WFairview — 39.17°N, 84.91°WIon — 42.50°N, 91.25°WLiberty — 39.00°N, 84.00°WLiberty — 41.00°N, 86.69°WLeipers — 35.50°N, 86.50°WSpechts Ferry — 42.50°N, 91.25°WClays Ferry — 38.00°N, 85.00°WClays Ferry — 38.00°N, 84.67°WBobcaygeon — 44.53°N, 78.55°WLa Pola — 30.32°S, 68.49°WCopenhagen — 39.98°N, 116.27°WBull Fork — 39.39°N, 83.92°W

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The named rock units Homotrypa has been recovered from, largest first. Drawn where the rock is now, not where it formed. 32 further formations hold fewer occurrences each and are not listed. 70 occurrences have no formation on record, which is common for older literature.

Homotrypa and its relatives

Ordovician

Where Homotrypa and its relatives were recorded in the Ordovician.

Found in the same rock

1,184 taxa

The Paleobiology Database records 121 sites for Homotrypa, 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

36 references

Each of the 204 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. 24 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 Homotrypa

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

No 3D scan of Homotrypa 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 itMonticuliporidae through timeFormations of the OrdovicianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Ulrich 1882