Cirolanidae

Cirolanidae is a family of aquatic isopods.

Cirolanidae

Hans Hillewaert · 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
Also called
pill bugPBDB
Sits inside
CymothooideaPBDB
Diet
omnivorePBDB, for Malacostraca
Life habit
epifaunalPBDB, for Malacostraca
Motility
actively mobilePBDB, for Malacostraca
Vision
well-developedPBDB, for Malacostraca

Time the record covers

At least 243 million years on record.

The record covers at least 245.19 Mya to 1.8 Mya. No occurrence read is dated outside 247 Mya to 774 ka.

Early Triassic — about 0 of 63 occurrencesMiddle Triassic — about 2 of 63 occurrencesLate Triassic — about 1 of 63 occurrencesLate TriassicEarly Jurassic — about 0 of 63 occurrencesMiddle Jurassic — about 15 of 63 occurrencesLate Jurassic — about 1 of 63 occurrencesEarly Cretaceous — about 10 of 63 occurrencesEarly CretaceousLate Cretaceous — about 10 of 63 occurrencesLate CretaceousPaleocene — about 1 of 63 occurrencesEocene — about 5 of 63 occurrencesEoceneOligocene — about 8 of 63 occurrencesMiocene — about 3 of 63 occurrencesPliocene — about 2 of 63 occurrencesPleistocene — about 5 of 63 occurrences252–244 Mya — about 2 occurrences244–235 Mya — about 0.6 occurrences235–227 Mya — about 0.5 occurrences176–168 Mya — about 15 occurrences168–160 Mya — about 0.5 occurrences160–151 Mya — about 0.4 occurrences151–143 Mya — about 0.6 occurrences143–134 Mya — about 0.8 occurrences134–126 Mya — about 3 occurrences126–118 Mya — about 3 occurrences118–109 Mya — about 2 occurrences109–101 Mya — about 1.0 occurrences101–92 Mya — about 2 occurrences92–84 Mya — about 3 occurrences84–76 Mya — about 2 occurrences76–67 Mya — about 3 occurrences67–59 Mya — about 1 occurrence59–50 Mya — about 1 occurrence50–42 Mya — about 0.6 occurrences42–34 Mya — about 3 occurrences34–25 Mya — about 6 occurrences25–17 Mya — about 4 occurrences17–8.4 Mya — about 0.5 occurrences8.4–0 Mya — about 7 occurrences245.19 Mya1.8 Mya252 Mya0 Mya

63 occurrences of Cirolanidae on record, most of them in the Middle Jurassic. The Paleobiology Database records this as a living group, and the chart stops with its fossils rather than at the present. 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

63 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

28 formations

Opalinus Clay — 47.33°N, 7.84°EOpalinus Clay — 47.46°N, 8.15°EMakah — 48.32°N, 124.50°WMakah — 48.32°N, 124.45°WMakah — 48.16°N, 123.79°WOpalinuston — 47.43°N, 8.15°ESierra Madre — 16.68°N, 93.46°WPysht — 48.18°N, 124.05°WPysht — 48.15°N, 123.86°WOpalinuston — 47.95°N, 7.82°EAustin Chalk — 29.49°N, 98.42°WAustin Chalk — 32.99°N, 96.81°WGrès à Voltzia — 48.73°N, 7.17°EGrès à Voltzia — 48.82°N, 7.24°ELakota — 44.28°N, 103.39°WSan Juan Raya — 18.33°N, 97.57°WEstancia 25 de Mayo — 50.51°S, 72.25°WJurensismergel — 47.95°N, 7.82°ETangahoe — 39.00°S, 175.00°EKowai — 44.61°S, 171.10°EZig-Zag Chalk — 51.13°N, 1.32°ETaylor — 29.70°N, 98.11°WCorsicana Marl — 30.57°N, 97.33°WLiegende Bankkalk — 48.12°N, 8.87°EAstoria — 47.27°N, 123.52°WOrizzonte di Roncà — 45.81°N, 11.29°EArida — 34.04°N, 135.17°EHoko River — 48.39°N, 124.66°WLe Mans — 48.00°N, 0.21°EReingrabener Schiefer — 47.88°N, 15.07°E

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The named rock units Cirolanidae has been recovered from, largest first. Drawn where the rock is now, not where it formed. 4 further formations hold fewer occurrences each and are not listed. 13 occurrences have no formation on record, which is common for older literature.

Cirolanidae and its relatives

Middle Jurassic

Where Cirolanidae and its relatives were recorded in the Middle Jurassic.

Found in the same rock

461 taxa

The Paleobiology Database records 57 sites for Cirolanidae, 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

31 references

Each of the 63 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. 19 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 Cirolanidae

Credit
Hans Hillewaert
Licence
CC BY-SA 4.0
Commercial use
the licence allows it

3D model

Source
Sketchfab
Licence
CC Attribution-NonCommercial-ShareAlike
Commercial use
the licence does not allow it

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 itCymothooidea through timeFormations of the Middle JurassicThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Dana 1852