Bactritida

The Bactritida are a small order of more or less straight-shelled (orthoconic) cephalopods that first appeared during the Emsian stage of the Devonian period with questionable origins in the Pragian stage before 409 million years ago, and persisted until the Carnian pluvial event in the upper middle Carnian stage of the Triassic period. They are considered ancestors of the ammonoids, as well as of the coleoids.

Bactritida

Antonov · Public Domain · 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
BactritoidaPBDB
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 179 million years on record.

The record covers at least 413.02 Mya to 233.6 Mya. No occurrence read is dated outside 419.62 Mya to 227.3 Mya.

Silurian — about 0 of 224 occurrencesDevonian — about 87 of 224 occurrencesDevonianCarboniferous — about 85 of 224 occurrencesCarboniferousPermian — about 51 of 224 occurrencesPermianEarly Triassic — about 0 of 224 occurrencesMiddle Triassic — about 0 of 224 occurrencesLate Triassic — about 1 of 224 occurrences423–417 Mya — about 1 occurrence417–410 Mya — about 4 occurrences410–403 Mya — about 11 occurrences403–397 Mya — about 10 occurrences397–390 Mya — about 9 occurrences390–383 Mya — about 7 occurrences383–377 Mya — about 17 occurrences377–370 Mya — about 17 occurrences370–363 Mya — about 9 occurrences363–357 Mya — about 2 occurrences357–350 Mya — about 0.1 occurrences350–343 Mya — about 0.1 occurrences343–337 Mya — about 0.1 occurrences337–330 Mya — about 6 occurrences330–323 Mya — about 13 occurrences323–317 Mya — about 13 occurrences317–310 Mya — about 3 occurrences310–303 Mya — about 6 occurrences303–297 Mya — about 47 occurrences297–290 Mya — about 13 occurrences290–283 Mya — about 19 occurrences283–277 Mya — about 6 occurrences277–270 Mya — about 3 occurrences270–263 Mya — about 4 occurrences263–257 Mya — about 2 occurrences257–250 Mya — about 0.9 occurrences237–230 Mya — about 0.6 occurrences230–223 Mya — about 0.4 occurrences413.02 Mya233.6 Mya423 Mya223 Mya

224 occurrences of Bactritida on record, most of them in the Devonian. 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

224 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

60 formations

Graham — 32.73°N, 98.64°WGraham — 33.27°N, 98.11°WGraham — 33.19°N, 98.11°WGraham — 33.17°N, 98.15°WGraham — 33.15°N, 98.16°WGraham — 33.12°N, 98.30°WGraham — 33.14°N, 99.18°WDomanik — 63.53°N, 53.41°EDomanik — 63.34°N, 53.71°EDomanik — 63.51°N, 53.61°EGogo — 18.50°S, 126.00°ENehden — 51.44°N, 8.65°EWitts Springs — 36.19°N, 93.20°WWitts Springs — 35.83°N, 93.13°WWitts Springs — 35.53°N, 92.00°WCoumiac — 43.43°N, 3.05°EHale — 36.06°N, 94.15°WHale — 36.02°N, 93.87°WHale — 36.09°N, 94.14°WHale — 35.91°N, 93.94°WHale — 36.17°N, 93.23°WRest Spring — 36.78°N, 117.46°WRest Spring — 36.55°N, 117.81°WKnoppenbiessen — 50.97°N, 7.17°EKizidjilginskii — 37.62°N, 74.86°ERuddell — 35.74°N, 91.64°WFayetteville — 35.84°N, 92.57°WFayetteville — 35.90°N, 92.62°WFayetteville — 35.92°N, 94.20°WImo — 35.80°N, 92.77°WCherokee — 38.51°N, 94.00°WOnondaga — 40.43°N, 78.39°WOnondaga — 39.65°N, 78.76°WGydo — 33.30°S, 21.83°EKwataboahegan — 51.50°N, 81.00°WOmi Limestone — 36.99°N, 137.79°EUyamano — 34.85°N, 133.27°EKochusu — 37.72°N, 74.54°EMoorefield — 35.76°N, 91.58°WMoorefield — 35.77°N, 91.70°WWissenbach — 50.79°N, 8.32°EBeul — 51.39°N, 7.87°EPlattensandstein — 51.28°N, 7.18°E

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The named rock units Bactritida has been recovered from, largest first. Drawn where the rock is now, not where it formed. 36 further formations hold fewer occurrences each and are not listed. 57 occurrences have no formation on record, which is common for older literature.

Bactritida and its relatives

Devonian

Where Bactritida and its relatives were recorded in the Devonian.

Found in the same rock

1,828 taxa

The Paleobiology Database records 174 sites for Bactritida, 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

58 references

Each of the 224 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. 46 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 Bactritida

Credit
Antonov
Licence
Public Domain
Commercial use
the licence allows it

No 3D scan of Bactritida 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 itBactritoida through timeFormations of the DevonianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Shimanskiy 1951