Cyclolobus

Clyclolobus is a smooth, essentially involute subdiscoidal goniatitid ammonoid that has sutures with a bifurcate ventral lobe, flared outwardly at the end, in which the halves may be secondarily trifurcated, ending in sharp, narrow projections. Lateral sutural elements follow an acuate line that swings first to the front, then sharply to the rear before becoming hidden by the next whorl. Saddles are narrow, cumulous in appearance with short, irregular, rounded sub-endings. Ventro-lateal lobes are trifurcate with pointed, thornlike projections.

Cyclolobus

Hectonichus · 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
CyclolobidaePBDB
Diet
carnivorePBDB, for Ammonoidea
Life habit
nektonicPBDB, for Goniatitida
Motility
fast-movingPBDB, for Ammonoidea
Vision
well-developedPBDB, for Cephalopoda
Environment
marinePBDB, for Cephalopoda

Time the record covers

At most 47 million years on record.

Every occurrence read is dated to somewhere between 298.9 Mya and 251.902 Mya, and nothing in the dating separates them, so that window is what the record shows rather than a span.

Carboniferous — about 0 of 37 occurrencesPermian — about 37 of 37 occurrencesPermianEarly Triassic — about 0 of 37 occurrences300–298 Mya — about 0.0 occurrences298–297 Mya — about 0.1 occurrences297–295 Mya — about 0.1 occurrences295–293 Mya — about 0.1 occurrences293–292 Mya — about 0.1 occurrences292–290 Mya — about 0.1 occurrences290–288 Mya — about 0.1 occurrences288–287 Mya — about 0.1 occurrences287–285 Mya — about 0.1 occurrences285–284 Mya — about 0.1 occurrences284–282 Mya — about 0.1 occurrences282–280 Mya — about 0.1 occurrences280–279 Mya — about 0.1 occurrences279–277 Mya — about 0.1 occurrences277–275 Mya — about 0.1 occurrences275–274 Mya — about 0.1 occurrences274–272 Mya — about 0.1 occurrences272–271 Mya — about 0.1 occurrences271–269 Mya — about 0.1 occurrences269–267 Mya — about 0.1 occurrences267–266 Mya — about 0.1 occurrences266–264 Mya — about 0.1 occurrences264–262 Mya — about 0.1 occurrences262–261 Mya — about 0.1 occurrences261–259 Mya — about 4 occurrences259–257 Mya — about 9 occurrences257–256 Mya — about 9 occurrences256–254 Mya — about 9 occurrences254–253 Mya — about 3 occurrences253–251 Mya — about 1 occurrence299.8 Mya251 Mya

37 occurrences of Cyclolobus on record, most of them in the Permian. 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

37 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

13 formations

Gungri — 32.28°N, 78.07°EGungri — 32.15°N, 78.25°EGungri — 32.29°N, 77.86°EGungri — 32.04°N, 78.09°EGungri — 32.04°N, 78.32°EGungri — 32.22°N, 77.96°EChhidru — 32.46°N, 72.19°EChhidru — 32.56°N, 71.78°EChhidru — 32.41°N, 72.10°EChhidru — 32.40°N, 72.15°EChhidru — 32.53°N, 71.93°EZewan — 34.30°N, 75.52°EZewan — 34.09°N, 74.98°EWegener Halvo — 74.14°N, 20.75°WWegener Halvo — 74.15°N, 20.74°WWegener Halvo — 74.03°N, 21.70°WHambast — 30.91°N, 53.22°ELower Sakamena — 13.55°S, 48.84°ELower Sakamena — 13.45°S, 48.97°EJuripu — 29.84°N, 84.13°EHardman — 19.09°S, 125.16°ESenmatsu — 38.78°N, 141.41°EConglomerate Mesa — 36.58°N, 117.85°WAkhura — 39.45°N, 45.23°EJulfa — 39.95°N, 44.90°ELyudyanza — 43.25°N, 132.00°E

Loading coastlines…

The named rock units Cyclolobus has been recovered from, largest first. Drawn where the rock is now, not where it formed. 4 occurrences have no formation on record, which is common for older literature.

Cyclolobus and its relatives

Permian

Where Cyclolobus and its relatives were recorded in the Permian.

Found in the same rock

281 taxa

The Paleobiology Database records 33 sites for Cyclolobus, 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

20 references

Each of the 37 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. 8 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 Cyclolobus

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

No 3D scan of Cyclolobus was found in MorphoSource and Sketchfab.

Smithsonian Open Access was 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 itCyclolobidae through timeFormations of the PermianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. (Waagen 1879)