Hazeliidae

Hazeliidae is an extinct family of spicular Cambrian sea sponges known from the Burgess Shale, the Marjum Formation of Utah, and possibly Chengjiang. It was described by Charles Walcott in 1920.

Hazeliidae

Uncredited · 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
DemospongiaePBDB
Diet
suspension feederPBDB, for Demospongiae
Life habit
intermediate-level epifaunalPBDB, for Demospongiae
Motility
stationary, attachedPBDB, for Demospongiae
Vision
blindPBDB, for Porifera

Time the record covers

At least 96 million years on record.

The record covers at least 516 Mya to 419.62 Mya. No occurrence read is dated outside 538.8 Mya to 393.47 Mya.

Cambrian — about 98 of 104 occurrencesCambrianOrdovician — about 5 of 104 occurrencesOrdovicianSilurian — about 0 of 104 occurrencesDevonian — about 1 of 104 occurrencesDevonian542–537 Mya — about 0.1 occurrences537–532 Mya — about 0.3 occurrences532–527 Mya — about 0.3 occurrences527–522 Mya — about 0.3 occurrences522–517 Mya — about 14 occurrences517–511 Mya — about 7 occurrences511–506 Mya — about 48 occurrences506–501 Mya — about 22 occurrences501–496 Mya — about 6 occurrences466–461 Mya — about 0.0 occurrences461–456 Mya — about 3 occurrences456–451 Mya — about 2 occurrences421–416 Mya — about 0.1 occurrences416–411 Mya — about 0.2 occurrences411–406 Mya — about 0.2 occurrences406–401 Mya — about 0.2 occurrences401–396 Mya — about 0.2 occurrences396–391 Mya — about 0.1 occurrences516 Mya419.62 Mya542 Mya391 Mya

104 occurrences of Hazeliidae on record, most of them in the Cambrian. 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

104 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

14 formations

Burgess Shale — 51.44°N, 116.47°WBurgess Shale — 51.38°N, 116.43°WBurgess Shale — 51.03°N, 115.83°WYu'anshan — 24.77°N, 102.58°EYuanshan — 24.81°N, 102.58°EYuanshan — 25.40°N, 103.38°EYuanshan — 24.84°N, 102.41°ELlanfawr Mudstone — 52.23°N, 3.37°WKinzers — 40.06°N, 76.37°WKinzers — 40.04°N, 76.31°WDuchesnay — 51.10°N, 115.95°WDuchesnay — 50.63°N, 115.60°WMarjum Limestone — 39.22°N, 113.40°WMarjum Limestone — 39.12°N, 113.12°WValdemiedes — 41.17°N, 1.48°WShuijingtuo — 30.50°N, 111.16°EWeeks — 39.22°N, 113.40°WStephen — 51.40°N, 116.48°WMila — 35.81°N, 53.28°EMarjum — 39.27°N, 113.31°WBalang — 28.42°N, 109.42°E

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The named rock units Hazeliidae has been recovered from, largest first. Drawn where the rock is now, not where it formed. 1 occurrence has no formation on record, which is common for older literature.

Hazeliidae and its relatives

Cambrian

Where Hazeliidae and its relatives were recorded in the Cambrian.

Found in the same rock

731 taxa

The Paleobiology Database records 54 sites for Hazeliidae, 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

23 references

Each of the 104 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. 11 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 Hazeliidae

Credit
nobody named on the record
Licence
not stated by the source
Commercial use
cannot be read from the licence given — check the record

No 3D scan of Hazeliidae 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 itDemospongiae through timeFormations of the CambrianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. De Laubenfels 1955