Homalonotidae

Homalonotidae is a family of trilobites that lived from the Ordovician to the Devonian. They are characterised by a shovel-like cephalon (head), and are closely related to the family Calymenidae.

Homalonotidae

Smokeybjb · 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
CalymeninaPBDB
Diet
carnivorePBDB, for Trilobita
Life habit
low-level epifaunalPBDB, for Trilobita
Motility
fast-movingPBDB, for Trilobita
Vision
well-developedPBDB
Environment
marinePBDB, for Trilobita

Time the record covers

At least 94 million years on record.

The record covers at least 477.1 Mya to 382.31 Mya. No occurrence read is dated outside 486.85 Mya to 372.15 Mya.

Cambrian — about 0 of 826 occurrencesOrdovician — about 486 of 826 occurrencesOrdovicianSilurian — about 108 of 826 occurrencesSilurianDevonian — about 231 of 826 occurrencesDevonian489–485 Mya — about 0.5 occurrences485–481 Mya — about 1 occurrence481–477 Mya — about 1 occurrence477–473 Mya — about 20 occurrences473–469 Mya — about 19 occurrences469–465 Mya — about 34 occurrences465–461 Mya — about 36 occurrences461–457 Mya — about 207 occurrences457–453 Mya — about 58 occurrences453–449 Mya — about 40 occurrences449–445 Mya — about 27 occurrences445–441 Mya — about 47 occurrences441–437 Mya — about 11 occurrences437–433 Mya — about 11 occurrences433–430 Mya — about 41 occurrences430–426 Mya — about 23 occurrences426–422 Mya — about 12 occurrences422–418 Mya — about 20 occurrences418–414 Mya — about 27 occurrences414–410 Mya — about 44 occurrences410–406 Mya — about 14 occurrences406–402 Mya — about 14 occurrences402–398 Mya — about 15 occurrences398–394 Mya — about 16 occurrences394–390 Mya — about 10 occurrences390–386 Mya — about 31 occurrences386–382 Mya — about 44 occurrences382–378 Mya — about 0.8 occurrences378–374 Mya — about 0.8 occurrences374–370 Mya — about 0.3 occurrences477.1 Mya382.31 Mya489 Mya370 Mya

826 occurrences of Homalonotidae on record, most of them in the Ordovician. 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

826 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

223 formations

Skaneateles — 42.80°N, 76.69°WSkaneateles — 42.90°N, 76.47°WSkaneateles — 42.97°N, 76.44°WSkaneateles — 42.95°N, 76.43°WSkaneateles — 42.98°N, 76.34°WSkaneateles — 42.94°N, 76.25°WSkaneateles — 42.86°N, 76.15°WSkaneateles — 42.86°N, 76.14°WSkaneateles — 42.93°N, 75.99°WSkaneateles — 42.95°N, 75.88°WSkaneateles — 42.89°N, 75.57°WSkaneateles — 42.85°N, 75.58°WSkaneateles — 42.88°N, 75.52°WSkaneateles — 43.00°N, 75.41°WSkaneateles — 42.86°N, 75.42°WSkaneateles — 42.79°N, 75.27°WSkaneateles — 42.85°N, 75.18°WSkaneateles — 42.83°N, 75.02°WSkaneateles — 42.82°N, 75.10°WSkaneateles — 42.81°N, 74.94°WSkaneateles — 42.87°N, 77.87°WSkaneateles — 42.98°N, 76.09°WGrès de May — 49.00°N, 0.00°EGrès de May — 49.00°N, 1.00°WGrès de May — 49.10°N, 0.37°WGrès de May — 49.02°N, 0.74°WGydo — 33.30°S, 21.83°EGydo — 33.52°S, 24.74°EGydo — 33.33°S, 19.37°EGydo — 32.64°S, 19.41°EGydo — 32.18°S, 18.90°EGydo — 33.77°S, 20.92°EGydo — 33.31°S, 22.43°EGydo — 34.01°S, 23.46°EGydo — 32.40°S, 20.67°ESarka — 50.00°N, 14.00°ESarka — 50.08°N, 14.75°ESarka — 50.18°N, 14.65°ESarka — 50.07°N, 14.72°ESarka — 49.77°N, 13.60°ESarka — 50.00°N, 14.10°ESarka — 50.08°N, 14.33°ESarka — 49.82°N, 13.75°ESarka — 50.82°N, 15.05°ESarka — 50.08°N, 14.10°ESarka — 49.68°N, 14.75°ESarka — 50.08°N, 14.58°ERochester Shale — 43.15°N, 77.62°WRochester Shale — 43.15°N, 77.06°WRochester Shale — 43.10°N, 79.06°WRochester Shale — 43.00°N, 79.00°WRochester Shale — 43.17°N, 78.68°WRochester Shale — 43.15°N, 77.72°WRochester Shale — 43.22°N, 76.82°WRochester Shale — 39.65°N, 78.76°WRochester Shale — 39.57°N, 78.84°WMahantango — 40.50°N, 77.25°WMahantango — 40.05°N, 77.52°WMahantango — 40.33°N, 76.92°WMahantango — 40.33°N, 77.17°WMahantango — 40.42°N, 77.17°WMahantango — 40.42°N, 77.00°WRochester — 43.18°N, 78.72°WRochester — 43.19°N, 77.56°WRochester — 43.23°N, 77.21°WRochester — 43.22°N, 77.02°WRochester — 43.19°N, 76.91°WRochester — 43.22°N, 76.81°WRochester — 43.26°N, 76.70°WRochester — 43.25°N, 76.64°WRochester — 43.15°N, 75.86°WBotella Quartzite — 38.77°N, 4.83°WBotella Quartzite — 38.26°N, 4.13°WBotella Quartzite — 38.72°N, 5.22°WCwm Rhiwarth — 53.00°N, 3.00°WNavas de Estena — 39.00°N, 4.00°WNavas de Estena — 39.47°N, 4.48°WUpper Fezouata — 30.42°N, 5.85°WUpper Fezouata — 30.50°N, 5.75°WUpper Fezouata — 32.00°N, 9.00°WUpper Fezouata — 31.42°N, 5.75°WUpper Fezouata — 27.88°N, 11.42°WUpper Fezouata — 27.82°N, 11.40°WUpper Fezouata — 29.90°N, 7.00°WUpper Fezouata — 30.33°N, 5.80°WUpper Fezouata — 30.40°N, 5.71°WUpper Fezouata — 30.82°N, 5.82°WCautley Mudstone — 54.37°N, 2.43°WCautley Mudstone — 54.32°N, 2.52°WWhite Head — 48.47°N, 64.32°WWhite Head — 48.52°N, 64.22°WWhite Head — 46.18°N, 59.82°WWhite Head — 49.00°N, 64.00°WUpper Ktaoua — 30.42°N, 5.35°WUpper Ktaoua — 30.72°N, 5.60°WUpper Ktaoua — 31.08°N, 5.25°WUpper Ktaoua — 30.77°N, 5.66°WUpper Ktaoua — 30.00°N, 5.50°WLiben — 50.00°N, 14.00°ELiben — 49.74°N, 13.54°ELiben — 49.72°N, 13.57°ELiben — 49.80°N, 13.63°ELiben — 49.82°N, 13.70°ELiben — 49.83°N, 13.83°EMount Ida — 36.77°S, 144.77°EMount Ida — 34.08°S, 151.02°EMount Ida — 37.00°S, 144.00°EMoscow — 42.83°N, 75.78°WMoscow — 42.67°N, 76.73°WMoscow — 42.81°N, 75.91°WMoscow — 42.68°N, 75.57°WMoscow — 42.68°N, 75.46°WMoscow — 42.77°N, 77.83°WJoslin Hill — 43.21°N, 75.46°WPostolonnec — 48.00°N, 4.00°WPostolonnec — 48.24°N, 4.46°WFonte da Horta — 40.00°N, 8.00°WFonte da Horta — 41.00°N, 8.00°WTachilla — 32.00°N, 4.00°WTachilla — 31.40°N, 5.33°WTachilla — 30.00°N, 8.50°WTachilla — 31.45°N, 4.17°WCouches du Foulon — 43.00°N, 3.00°ECouches du Foulon — 43.47°N, 3.05°ELower Ktaoua — 30.08°N, 6.88°WLower Ktaoua — 30.42°N, 5.67°WLower Ktaoua — 31.00°N, 5.00°WLower Ktaoua — 31.08°N, 5.27°WLower Ktaoua — 30.00°N, 8.50°WLower Ktaoua — 31.23°N, 4.53°WLower Ktaoua — 31.15°N, 5.10°WRio-Schiefer — 38.38°N, 3.76°WRio-Schiefer — 38.40°N, 3.37°W

Loading coastlines…

The named rock units Homalonotidae has been recovered from, largest first. Drawn where the rock is now, not where it formed. 199 further formations hold fewer occurrences each and are not listed. 153 occurrences have no formation on record, which is common for older literature.

Homalonotidae and its relatives

Ordovician

Where Homalonotidae and its relatives were recorded in the Ordovician.

Found in the same rock

1,731 taxa

The Paleobiology Database records 642 sites for Homalonotidae, and this reads 240 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

206 references

Each of the 826 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. 194 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 Homalonotidae

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

No 3D scan was found. Smithsonian Open Access, MorphoSource and Sketchfab were all searched.

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 itCalymenina through timeFormations of the OrdovicianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Chapman 1890