Macrobaenidae

Macrobaenidae is an extinct family of turtles, known from the Early Cretaceous to Paleogene of Laurasia. Their relationships to other turtles and whether they form a monophlyletic group are controversial. They are typically interpreted as stem or crown group cryptodires, but some more recent analyses have found them to lie outside crown group Testudines. Macrobaenids can be distinguished from other testudinatans by the presence of a carotid fenestra, cruciform plastron with strap-like epiplastra, and a lack of extragulars.

Macrobaenidae

Internet Archive Book Images · No restrictions · 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
MacrobaenoideaPBDB
Diet
omnivorePBDB, for Cryptodira
Life habit
aquaticPBDB, for Cryptodira
Motility
actively mobilePBDB, for Osteichthyes
Environment
freshwaterPBDB, for Cryptodira

Time the record covers

At least 87 million years on record.

The record covers at least 143.1 Mya to 56 Mya. No occurrence read is dated outside 161.5 Mya to 33.9 Mya.

Middle Jurassic — about 0 of 82 occurrencesLate Jurassic — about 2 of 82 occurrencesLate JurassicEarly Cretaceous — about 14 of 82 occurrencesEarly CretaceousLate Cretaceous — about 46 of 82 occurrencesLate CretaceousPaleocene — about 19 of 82 occurrencesEocene — about 1 of 82 occurrencesEoceneOligocene — about 0 of 82 occurrences164–160 Mya — about 0.1 occurrences160–155 Mya — about 0.2 occurrences155–151 Mya — about 0.2 occurrences151–146 Mya — about 0.5 occurrences146–142 Mya — about 0.5 occurrences142–138 Mya — about 0.4 occurrences138–133 Mya — about 2 occurrences133–129 Mya — about 0.2 occurrences129–124 Mya — about 0.1 occurrences124–120 Mya — about 1 occurrence120–115 Mya — about 3 occurrences115–111 Mya — about 2 occurrences111–107 Mya — about 2 occurrences107–102 Mya — about 2 occurrences102–98 Mya — about 4 occurrences98–93 Mya — about 5 occurrences93–89 Mya — about 2 occurrences89–84 Mya — about 2 occurrences84–80 Mya — about 4 occurrences80–76 Mya — about 4 occurrences76–71 Mya — about 7 occurrences71–67 Mya — about 17 occurrences67–62 Mya — about 7 occurrences62–58 Mya — about 6 occurrences58–53 Mya — about 9 occurrences53–49 Mya — about 0.2 occurrences49–45 Mya — about 0.2 occurrences45–40 Mya — about 0.2 occurrences40–36 Mya — about 0.2 occurrences36–31 Mya — about 0.1 occurrences143.1 Mya56 Mya164 Mya31 Mya

82 occurrences of Macrobaenidae 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

82 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

36 formations

Hell Creek — 45.94°N, 103.95°WHell Creek — 47.62°N, 107.32°WHell Creek — 47.07°N, 106.92°WHell Creek — 46.41°N, 103.50°WHell Creek — 46.47°N, 104.02°WHell Creek — 45.87°N, 103.79°WKhodzhakul — 40.10°N, 65.80°EHornerstown — 39.97°N, 74.68°WHornerstown — 39.76°N, 75.16°WHornerstown — 39.90°N, 74.82°WMinhe — 39.82°N, 98.30°ELance — 43.15°N, 104.57°WLance — 43.07°N, 104.60°WSevern — 38.91°N, 76.85°WIlek — 55.90°N, 87.96°EIlek — 56.57°N, 91.85°EFort Union — 44.30°N, 109.00°WFort Union — 45.20°N, 109.00°WMurtoi — 51.20°N, 106.27°EMurtoi — 51.28°N, 106.43°EDinosaur Park — 50.78°N, 111.50°WDinosaur Park — 50.74°N, 111.46°WKhuren Dukh — 45.85°N, 108.40°EBissekty — 42.12°N, 62.66°EBostobe — 46.48°N, 64.43°EBostobe — 46.57°N, 63.87°EWilliamsburg — 33.43°N, 80.10°WWilliamsburg — 33.67°N, 79.83°WAquia — 38.45°N, 77.25°WAquia — 38.74°N, 77.01°WNavesink — 40.40°N, 74.03°WNavesink — 40.38°N, 74.21°WGoler — 35.50°N, 117.77°WGoler — 35.50°N, 117.75°WPaskapoo — 51.10°N, 114.20°WNew Egypt — 39.73°N, 75.16°WRavenscrag — 49.13°N, 104.88°WKhilok — 50.68°N, 107.92°EAlamyshik — 40.00°N, 73.00°EDzunbain — 42.45°N, 102.42°EKhulsangol — 45.85°N, 108.40°E

Loading coastlines…

The named rock units Macrobaenidae has been recovered from, largest first. Drawn where the rock is now, not where it formed. 12 further formations hold fewer occurrences each and are not listed. 10 occurrences have no formation on record, which is common for older literature.

Macrobaenidae and its relatives

Late Cretaceous

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

Found in the same rock

788 taxa

The Paleobiology Database records 70 sites for Macrobaenidae, 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

47 references

Each of the 82 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. 35 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 Macrobaenidae

Credit
Internet Archive Book Images
Licence
No restrictions
Commercial use
cannot be read from the licence given — check the record

No 3D scan of Macrobaenidae 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 itMacrobaenoidea through timeFormations of the Late CretaceousThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. (Sukhanov 1964)