Gerastos

Gerastos is a genus of proetid trilobite in the family Proetidae that lived between the Pragian and Eifelian of the Lower-Middle Devonian, spanning approximately 21 million years.

Gerastos

Luis Fernández García · CC BY-SA 4.0 · 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
ProetinaePBDB
Diet
deposit feederPBDB, for Proetida
Life habit
low-level epifaunalPBDB, for Trilobita
Motility
fast-movingPBDB, for Trilobita
Vision
well-developedPBDB, for Proetidae
Environment
marinePBDB, for Trilobita

Time the record covers

At least 44 million years on record.

The record covers at least 430.6 Mya to 385.9 Mya. No occurrence read is dated outside 432.9 Mya to 382.31 Mya.

Silurian — about 25 of 136 occurrencesSilurianDevonian — about 111 of 136 occurrencesDevonian434–432 Mya — about 5 occurrences432–430 Mya — about 11 occurrences430–429 Mya — about 2 occurrences429–427 Mya — about 2 occurrences427–425 Mya — about 4 occurrences425–423 Mya — about 1 occurrence423–422 Mya — about 0.3 occurrences420–418 Mya — about 0.1 occurrences418–416 Mya — about 0.1 occurrences416–415 Mya — about 0.1 occurrences415–413 Mya — about 2 occurrences413–411 Mya — about 19 occurrences411–409 Mya — about 6 occurrences409–408 Mya — about 1.0 occurrences408–406 Mya — about 1.0 occurrences406–404 Mya — about 1.0 occurrences404–402 Mya — about 1.0 occurrences402–401 Mya — about 1.0 occurrences401–399 Mya — about 2 occurrences399–397 Mya — about 4 occurrences397–395 Mya — about 4 occurrences395–394 Mya — about 4 occurrences394–392 Mya — about 13 occurrences392–390 Mya — about 15 occurrences390–388 Mya — about 17 occurrences388–387 Mya — about 12 occurrences387–385 Mya — about 6 occurrences385–383 Mya — about 2 occurrences383–381 Mya — about 0.5 occurrences430.6 Mya385.9 Mya434 Mya381 Mya

136 occurrences of Gerastos 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

136 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

42 formations

Cape Phillips — 75.80°N, 94.50°WCape Phillips — 75.10°N, 94.00°WCape Phillips — 74.10°N, 94.00°WCape Phillips — 75.00°N, 95.00°WJemelle — 50.07°N, 4.61°EJemelle — 50.16°N, 5.26°EJemelle — 50.04°N, 4.51°EJemelle — 50.05°N, 4.42°EJemelle — 50.06°N, 4.53°EJemelle — 49.98°N, 4.70°EJemelle — 50.26°N, 5.47°EHanonet — 50.09°N, 5.18°EHanonet — 50.07°N, 5.09°EHanonet — 50.06°N, 4.50°EBou-Dib — 31.00°N, 4.81°WBou-Dib — 31.03°N, 5.03°WBou-Dib — 30.75°N, 4.70°WBou-Dib — 30.76°N, 4.68°WEl Otfal — 30.76°N, 5.46°WEl Otfal — 30.97°N, 5.03°WEl Otfal — 31.09°N, 4.90°WEl Otfal — 30.61°N, 4.54°WEl Otfal — 30.75°N, 4.69°WEl Otfal — 30.70°N, 5.43°WKoneprusy Limestone — 49.92°N, 14.06°ETaboumakhlouf — 30.75°N, 4.69°WTaboumakhlouf — 30.75°N, 4.68°WTaboumakhlouf — 30.61°N, 4.54°WWiedenest — 51.03°N, 7.55°EWiedenest — 51.28°N, 8.08°ETimrhanrhart — 29.71°N, 6.70°WOhle — 51.29°N, 8.04°EOhle — 51.28°N, 8.08°EKoneprusy — 49.92°N, 14.07°EChefar el Ahmar — 29.56°N, 2.15°WDaleje-Trebotov — 49.92°N, 14.07°EZlichov Limestone — 50.00°N, 14.00°EZlichov Limestone — 49.50°N, 14.33°ESlite Beds — 57.72°N, 18.80°EAhrdorf — 50.22°N, 6.70°EAmerboh — 31.37°N, 4.05°WFreilingen — 50.21°N, 6.46°EMassenkalk — 51.37°N, 7.73°EMassenkalk — 51.20°N, 8.05°EMeinkenbracht — 51.28°N, 8.08°EBicken-Ense — 50.60°N, 8.25°EIhmert — 51.28°N, 7.68°EIhmert — 51.15°N, 7.55°EVinarice Limestone — 50.00°N, 14.00°EKonovka Suite — 48.53°N, 26.67°E

Loading coastlines…

The named rock units Gerastos has been recovered from, largest first. Drawn where the rock is now, not where it formed. 18 further formations hold fewer occurrences each and are not listed. 26 occurrences have no formation on record, which is common for older literature.

Gerastos and its relatives

Devonian

Where Gerastos and its relatives were recorded in the Devonian.

Found in the same rock

936 taxa

The Paleobiology Database records 102 sites for Gerastos, 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

34 references

Each of the 136 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. 22 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 content2

Picture of Gerastos

Credit
Luis Fernández García
Licence
CC BY-SA 4.0
Commercial use
the licence allows it

3D model

Source
Sketchfab
Licence
CC Attribution
Commercial use
cannot be read from the licence given — check the record

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 itProetinae through timeFormations of the DevonianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Goldfuss 1843