Orthoceratoidea

Orthoceratoidea, from Ancient Greek ὀρθός (orthós), meaning "straight", and κέρας (kéras), meaning "horn", is a major subclass of nautiloid cephalopods. Members of this subclass usually have orthoconic (straight) to slightly cyrtoconic (curved) shells, and central to subcentral siphuncles which may bear internal deposits. Orthoceratoids are also characterized by dorsomyarian muscle scars, extensive cameral deposits, and calciosiphonate connecting rings with a porous and calcitic inner layer.

Orthoceratoidea

Parent Géry · CC BY-SA 3.0 · 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
CephalopodaPBDB
Diet
carnivorePBDB, for Cephalopoda
Life habit
nektonicPBDB, for Cephalopoda
Motility
fast-movingPBDB, for Cephalopoda
Vision
well-developedPBDB, for Cephalopoda
Environment
marinePBDB, for Cephalopoda

Time the record covers

At least 363 million years on record.

The record covers at least 483.4 Mya to 119.57 Mya. No occurrence read is dated outside 486.85 Mya to 113.2 Mya.

Cambrian — about 0 of 4732 occurrencesOrdovician — about 2208 of 4732 occurrencesOrdovicianSilurian — about 891 of 4732 occurrencesDevonian — about 538 of 4732 occurrencesDevonianCarboniferous — about 591 of 4732 occurrencesCarboniferousPermian — about 264 of 4732 occurrencesPermianEarly Triassic — about 59 of 4732 occurrencesMiddle Triassic — about 106 of 4732 occurrencesLate Triassic — about 69 of 4732 occurrencesLate TriassicEarly Jurassic — about 0 of 4732 occurrencesMiddle Jurassic — about 0 of 4732 occurrencesLate Jurassic — about 0 of 4732 occurrencesEarly Cretaceous — about 5 of 4732 occurrencesEarly Cretaceous494–481 Mya — about 34 occurrences481–468 Mya — about 245 occurrences468–455 Mya — about 761 occurrences455–443 Mya — about 1177 occurrences443–430 Mya — about 396 occurrences430–417 Mya — about 521 occurrences417–404 Mya — about 196 occurrences404–391 Mya — about 88 occurrences391–378 Mya — about 190 occurrences378–365 Mya — about 13 occurrences365–352 Mya — about 31 occurrences352–339 Mya — about 20 occurrences339–326 Mya — about 195 occurrences326–313 Mya — about 149 occurrences313–300 Mya — about 189 occurrences300–287 Mya — about 51 occurrences287–274 Mya — about 54 occurrences274–261 Mya — about 56 occurrences261–248 Mya — about 157 occurrences248–235 Mya — about 152 occurrences235–222 Mya — about 37 occurrences222–209 Mya — about 12 occurrences209–196 Mya — about 3 occurrences145–132 Mya — about 4 occurrences132–119 Mya — about 0.1 occurrences119–106 Mya — about 0.9 occurrences483.4 Mya119.57 Mya494 Mya106 Mya

4,732 occurrences of Orthoceratoidea on record, most of them in the Ordovician. The Paleobiology Database records this as a living group, and the chart stops with its fossils rather than at the present. 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

4,732 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

802 formations

Fluminimaggiore — 39.43°N, 8.50°EFluminimaggiore — 39.32°N, 8.53°EFluminimaggiore — 39.50°N, 8.50°EFluminimaggiore — 39.32°N, 8.65°EGraham — 33.11°N, 98.59°WGraham — 33.00°N, 98.67°WGraham — 33.24°N, 98.14°WGraham — 32.73°N, 98.64°WGraham — 33.27°N, 98.11°WGraham — 33.17°N, 98.15°WGraham — 33.13°N, 98.16°WGraham — 33.05°N, 98.40°WGraham — 33.12°N, 98.51°WGraham — 33.12°N, 98.30°WGraham — 33.14°N, 99.18°WBaota — 33.00°N, 111.00°EBaota — 29.00°N, 109.00°EBaota — 28.00°N, 107.00°EBaota — 29.00°N, 107.00°EBaota — 32.00°N, 105.00°EBaota — 27.00°N, 107.00°EBaota — 28.00°N, 109.00°EBaota — 32.00°N, 108.00°EBaota — 28.00°N, 105.00°EBaota — 32.00°N, 106.00°EBaota — 29.00°N, 110.00°EBaota — 29.00°N, 111.00°EBaota — 30.00°N, 111.00°EBaota — 31.00°N, 111.00°EBaota — 27.00°N, 101.00°EBaota — 32.00°N, 118.00°EBaota — 31.00°N, 117.00°EBaota — 30.00°N, 116.00°EBaota — 33.00°N, 106.00°EBaota — 33.00°N, 108.00°EBaota — 32.00°N, 119.00°EBaota — 31.00°N, 121.00°EBaota — 32.00°N, 100.00°EShan Majiagou — 39.67°N, 118.26°EShan Majiagou — 39.00°N, 118.00°EShan Majiagou — 39.00°N, 115.00°EShan Majiagou — 36.00°N, 114.00°EShan Majiagou — 38.00°N, 111.00°EShan Majiagou — 38.00°N, 113.00°EShan Majiagou — 38.00°N, 114.00°EShan Majiagou — 36.00°N, 113.00°EShan Majiagou — 36.00°N, 112.00°EShan Majiagou — 40.00°N, 112.00°EShan Majiagou — 41.00°N, 123.00°EShan Majiagou — 40.00°N, 123.00°EShan Majiagou — 35.00°N, 112.00°EFayetteville — 35.87°N, 93.96°WFayetteville — 36.06°N, 94.13°WFayetteville — 35.95°N, 93.98°WFayetteville — 35.90°N, 92.62°WFayetteville — 35.89°N, 92.90°WFayetteville — 36.07°N, 94.17°WFayetteville — 35.99°N, 93.18°WFayetteville — 35.89°N, 92.80°WFayetteville — 36.10°N, 93.10°WFayetteville — 36.04°N, 92.76°WFayetteville — 36.00°N, 94.08°WFayetteville — 35.75°N, 94.39°WFayetteville — 36.24°N, 93.37°WFayetteville — 35.74°N, 91.82°WFayetteville — 35.20°N, 92.35°WFayetteville — 35.80°N, 91.92°WFayetteville — 36.05°N, 94.17°WDunleith — 43.00°N, 91.00°WOverton — 52.48°N, 2.63°WRacine — 43.04°N, 87.91°WRacine — 43.05°N, 88.01°WRacine — 42.73°N, 87.78°WRacine — 42.88°N, 88.04°WRacine — 41.85°N, 87.65°WXia Majiagou — 40.00°N, 118.00°EXia Majiagou — 39.00°N, 118.00°EXia Majiagou — 39.00°N, 115.00°EXia Majiagou — 41.00°N, 118.00°EXia Majiagou — 40.00°N, 119.00°EXia Majiagou — 36.00°N, 114.00°EXia Majiagou — 38.00°N, 113.00°EXia Majiagou — 40.00°N, 123.00°EXia Majiagou — 42.00°N, 126.00°EMoscow — 42.70°N, 76.75°WMoscow — 42.83°N, 75.78°WMoscow — 42.67°N, 76.73°WMoscow — 42.82°N, 76.34°WMoscow — 42.79°N, 76.15°WMoscow — 42.77°N, 76.03°WMoscow — 42.81°N, 75.91°WMoscow — 42.59°N, 75.18°WMoscow — 42.68°N, 75.57°WMoscow — 42.68°N, 75.46°WMoscow — 42.54°N, 74.87°WMoscow — 42.75°N, 77.15°WMoscow — 42.78°N, 77.33°WMoscow — 42.67°N, 76.95°WMoscow — 42.60°N, 74.60°WBoda Limestone — 61.17°N, 14.71°EBoda Limestone — 60.97°N, 15.43°EBoda Limestone — 61.05°N, 15.20°EBoda Limestone — 60.97°N, 15.13°EImo — 35.78°N, 92.55°WImo — 35.81°N, 92.55°WImo — 35.79°N, 92.77°WImo — 35.76°N, 92.93°WVasalemma — 59.24°N, 24.29°EVasalemma — 59.23°N, 24.23°EJupiter — 49.47°N, 63.62°WJupiter — 49.38°N, 63.60°WJupiter — 49.20°N, 61.73°WJupiter — 49.16°N, 62.72°WJupiter — 49.16°N, 62.80°WJupiter — 49.38°N, 63.40°WJupiter — 49.56°N, 63.35°WJupiter — 49.22°N, 62.40°WJupiter — 49.13°N, 62.35°WJupiter — 49.50°N, 63.32°WJupiter — 49.50°N, 63.00°WJupiter — 49.25°N, 63.04°WJupiter — 49.28°N, 63.22°WJupiter — 49.45°N, 63.41°WJupiter — 49.13°N, 62.50°WElnes — 60.00°N, 11.00°EElnes — 59.91°N, 10.67°EElnes — 60.00°N, 11.17°EElnes — 60.38°N, 10.42°EElnes — 60.78°N, 10.08°EElnes — 59.91°N, 10.81°EElnes — 57.99°N, 7.60°EElnes — 60.79°N, 11.08°EElnes — 59.72°N, 10.14°EElnes — 60.31°N, 10.57°EPitkin — 35.80°N, 91.91°WPitkin — 35.79°N, 92.54°WPitkin — 35.69°N, 91.73°WPitkin — 35.91°N, 92.63°WPitkin — 36.04°N, 92.79°WPitkin — 35.79°N, 92.97°WAmadjuak — 63.72°N, 68.97°WAmadjuak — 65.25°N, 73.17°WAmadjuak — 66.00°N, 69.83°WAmadjuak — 68.80°N, 81.24°WMaquoketa — 42.01°N, 91.64°WMaquoketa — 43.61°N, 92.43°WMaquoketa — 43.28°N, 91.37°WMaquoketa — 45.00°N, 93.00°WMaquoketa — 43.00°N, 92.00°WCrown Point — 44.87°N, 73.45°WCrown Point — 44.86°N, 73.39°WCrown Point — 44.62°N, 73.42°WCrown Point — 44.03°N, 73.42°WCrown Point — 44.19°N, 73.31°WCrown Point — 44.17°N, 73.25°WLudlowville — 42.80°N, 78.85°WLudlowville — 42.85°N, 78.64°WLudlowville — 42.96°N, 78.13°WLudlowville — 42.83°N, 77.84°WLudlowville — 42.80°N, 77.27°WLudlowville — 42.78°N, 76.99°WLudlowville — 42.85°N, 78.64°WLudlowville — 42.85°N, 78.37°WLudlowville — 43.00°N, 79.00°WLudlowville — 42.87°N, 75.71°WSkaneateles — 42.80°N, 76.69°WSkaneateles — 42.90°N, 76.47°WSkaneateles — 42.95°N, 76.43°WSkaneateles — 42.94°N, 76.25°WSkaneateles — 42.93°N, 75.99°WSkaneateles — 42.86°N, 76.15°WSkaneateles — 42.86°N, 76.14°WSkaneateles — 42.86°N, 75.89°WSkaneateles — 42.97°N, 76.44°WSkaneateles — 42.98°N, 76.34°WSkaneateles — 42.87°N, 75.56°WSkaneateles — 42.85°N, 75.58°WSkaneateles — 42.87°N, 77.88°WSkaneateles — 42.81°N, 76.81°WHalstatt — 47.56°N, 13.63°EHalstatt — 47.67°N, 13.72°EHalstatt — 47.60°N, 13.88°EHalstatt — 46.63°N, 13.68°EHalstatt — 47.63°N, 13.69°EHalstatt — 47.59°N, 13.85°EWaynesville — 39.45°N, 83.83°WWaynesville — 39.44°N, 84.20°WWaynesville — 39.42°N, 85.01°WWaynesville — 39.00°N, 84.00°WWaynesville — 39.53°N, 84.08°WWaynesville — 39.38°N, 84.08°WWaynesville — 39.41°N, 83.98°WPozary — 49.93°N, 14.18°EPozary — 50.08°N, 14.47°EPozary — 49.90°N, 14.02°EPozary — 49.93°N, 14.13°EPozary — 50.03°N, 14.32°EPozary — 49.15°N, 13.57°E

Loading coastlines…

The named rock units Orthoceratoidea has been recovered from, largest first. Drawn where the rock is now, not where it formed. 778 further formations hold fewer occurrences each and are not listed. 702 occurrences have no formation on record, which is common for older literature.

Orthoceratoidea and its relatives

Ordovician

Where Orthoceratoidea and its relatives were recorded in the Ordovician.

Found in the same rock

2,736 taxa

The Paleobiology Database records at least 841 sites for Orthoceratoidea, 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

646 references

Each of the 4,732 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. 634 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 Orthoceratoidea

Credit
Parent Géry
Licence
CC BY-SA 3.0
Commercial use
the licence allows it

No 3D scan of Orthoceratoidea 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 itCephalopoda through timeFormations of the OrdovicianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. (M'Coy 1844)