Quitmaniceras

Quitmaniceras is a genus of small, compressed, fairly evolute ammonites from the lower Turonian of Grant County, New Mexico and Trans-Pecos Texas, included in the subfamily Acanthoceratinae. The shell has a carinate venter in juveniles and one that is arched in adults, usually with a raised siphonal line,(siphonal referring to the marginal siphuncle). Ribs are very weak to moderately strong, flexious, typically sloping forward toward the rim, bending further forward at the outer shoulder.

No picture of Quitmaniceras was found. Wikipedia, Wikidata and iDigBio were searched and had none. Smithsonian Open Access did not answer, so this is what the others held rather than everything there is. GBIF was asked, and what came back is not recorded: nothing, or a picture this site could not tie to Quitmaniceras, or no answer at all. This entry cannot say which.

On record

Recorded, not inferred
Sits inside
AcanthoceratinaePBDB
Diet
carnivorePBDB, for Ammonoidea
Life habit
nektonicPBDB, for Ammonoidea
Motility
fast-movingPBDB, for Ammonoidea
Vision
well-developedPBDB, for Cephalopoda
Environment
marinePBDB, for Cephalopoda

Time the record covers

At most 4.1 million years on record.

Every occurrence read is dated to somewhere between 93.9 Mya and 89.8 Mya, and nothing in the dating separates them, so that window is what the record shows rather than a span.

Late Cretaceous — about 8 of 8 occurrencesLate Cretaceous94–94 Mya — about 0.0 occurrences94–94 Mya — about 0.3 occurrences94–94 Mya — about 0.3 occurrences94–93 Mya — about 0.3 occurrences93–93 Mya — about 0.3 occurrences93–93 Mya — about 0.3 occurrences93–93 Mya — about 0.3 occurrences93–93 Mya — about 0.3 occurrences93–93 Mya — about 0.3 occurrences93–92 Mya — about 0.3 occurrences92–92 Mya — about 0.3 occurrences92–92 Mya — about 0.3 occurrences92–92 Mya — about 0.3 occurrences92–92 Mya — about 0.3 occurrences92–92 Mya — about 0.3 occurrences92–91 Mya — about 0.3 occurrences91–91 Mya — about 0.3 occurrences91–91 Mya — about 0.3 occurrences91–91 Mya — about 0.3 occurrences91–91 Mya — about 0.3 occurrences91–90 Mya — about 0.3 occurrences90–90 Mya — about 0.3 occurrences90–90 Mya — about 0.3 occurrences90–90 Mya — about 0.3 occurrences90–90 Mya — about 0.3 occurrences90–90 Mya — about 0.0 occurrences94.4 Mya89.3 Mya

8 occurrences of Quitmaniceras on record, most of them in the Late Cretaceous. 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

8 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

5 formations

Mancos Shale — 35.73°N, 110.82°WAgua Nueva — 26.66°N, 100.02°WGreenhorn Limestone — 38.28°N, 104.72°WChispa Summit — 31.06°N, 105.25°WOjinaga — 30.80°N, 105.28°W

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The named rock units Quitmaniceras has been recovered from, largest first. Drawn where the rock is now, not where it formed.

Quitmaniceras and its relatives

Late Cretaceous

Where Quitmaniceras and its relatives were recorded in the Late Cretaceous.

Found in the same rock

26 taxa

The Paleobiology Database records 7 sites for Quitmaniceras, 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

5 references

Each of the 8 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. 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 content0

No picture of Quitmaniceras was found. Wikipedia, Wikidata and iDigBio were searched and had none.

Smithsonian Open Access did not answer, so this is what the others held rather than everything there is.

GBIF was asked, and what came back is not recorded: nothing, or a picture this site could not tie to Quitmaniceras, or no answer at all. This entry cannot say which.

No 3D scan of Quitmaniceras 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 itAcanthoceratinae through timeFormations of the Late CretaceousThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Powell 1963