Jacanidae

The jacanas are a group of tropical waders in the family Jacanidae. They are found in tropical regions around the world. They are noted for their elongated toes and toenails that allow them to spread out their weight while foraging on floating or semi-emergent aquatic vegetation. They are also among the somewhat rare groups of birds in which females are larger, and several species maintain harems of males in the breeding season with males solely responsible for incubating eggs and taking care of the chicks.

Jacanidae

Uncredited · CC BY-SA 2.0 · 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
CharadriiformesPBDB
Diet
carnivorePBDB, for Coelurosauria
Life habit
ground dwelling, solitaryPBDB, for Theropoda
Motility
actively mobilePBDB, for Theropoda
Environment
marinePBDB, for Charadriiformes

Time the record covers

At least 27 million years on record.

The record covers at least 27.3 Mya to 11.7 ka. No occurrence read is dated outside 33.9 Mya to 0 Mya.

Eocene — about 0 of 13 occurrencesOligocene — about 3 of 13 occurrencesOligoceneMiocene — about 2 of 13 occurrencesMiocenePliocene — about 0 of 13 occurrencesPleistocene — about 2 of 13 occurrences35–33 Mya — about 0.2 occurrences33–32 Mya — about 0.5 occurrences32–31 Mya — about 0.5 occurrences31–30 Mya — about 0.5 occurrences30–29 Mya — about 0.5 occurrences29–28 Mya — about 0.5 occurrences28–27 Mya — about 0.2 occurrences20–18 Mya — about 0.0 occurrences18–17 Mya — about 0.5 occurrences17–16 Mya — about 0.5 occurrences10–9.2 Mya — about 0.0 occurrences9.2–8.1 Mya — about 0.2 occurrences8.1–6.9 Mya — about 0.2 occurrences6.9–5.8 Mya — about 0.2 occurrences5.8–4.6 Mya — about 0.2 occurrences1.2–0 Mya — about 8 occurrences27.3 Mya11.7 ka34.6 Mya0 Mya

13 occurrences of Jacanidae on record. The Paleobiology Database records this as a living group. 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

13 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

4 formations

Jebel Qatrani — 29.45°N, 30.58°ENuapua — 20.75°S, 63.07°WAlachua — 29.65°N, 82.60°WSheep Creek — 42.40°N, 103.80°W

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The named rock units Jacanidae has been recovered from, largest first. Drawn where the rock is now, not where it formed. 7 occurrences have no formation on record, which is common for older literature.

Found in the same rock

316 taxa

The Paleobiology Database records 12 sites for Jacanidae, 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

7 references

Each of the 13 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 content1

Picture of Jacanidae

Credit
nobody named on the record
Licence
CC BY-SA 2.0
Commercial use
the licence allows it

No 3D scan of Jacanidae was found in Smithsonian Open Access and Sketchfab.

MorphoSource 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 itCharadriiformes through timeThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Stejneger 1885