Leptomitidae

Not Leptomitidae. This is Tuponia Walcott, 1920, a relative — both are Leptomitidae.
Yale Peabody Museum · CC0 · via GBIF. 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
- ProtomonaxonidaPBDB
- 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 267 million years on record.
The record covers at least 516 Mya to 248.6 Mya. No occurrence read is dated outside 538.8 Mya to 247 Mya.
121 occurrences of Leptomitidae 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
121 occurrences- Cambrian96%
- Ordovicianunder 1%
- Silurian2%
- Early Triassic2%
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
18 formations
- Yu'anshan Formation35
- Yuanshan Formation23
- Burgess Shale Formation · Chancellor Group17
- Qiongzhusi Formation10
- Balang Formation8
- Marjum Formation4
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The named rock units Leptomitidae has been recovered from, largest first. Drawn where the rock is now, not where it formed. 4 occurrences have no formation on record, which is common for older literature.
Leptomitidae and its relatives
CambrianWhere Leptomitidae and its relatives were recorded in the Cambrian.
Found in the same rock
769 taxa- Misszhouia longicaudata20 sites
- Paraleptomitella dictyodroma20 sites
- Isoxys auritus18 sites
- Leanchoilia illecebrosa18 sites
- Naraoia spinosa18 sites
- Heliomedusa orienta17 sites
- Branchiocaris yunnanensis16 sites
- Arthropoda15 sites
- Hazelia15 sites
- Kunmingella douvillei15 sites
- Mafangscolex sinensis15 sites
- Naraoia14 sites
- Leptomitus teretiusculus13 sites
- Eoredlichia intermediata12 sites
- Isoxys paradoxus12 sites
- Cricocosmia jinningensis11 sites
- Isoxys11 sites
- Saetaspongia densa11 sites
- Selkirkia11 sites
- Yunnanocephalus yunnanensis11 sites
- Amplectobelua symbrachiata10 sites
- Choia10 sites
- Choiaella radiata10 sites
- Diandongia pista10 sites
The Paleobiology Database records 54 sites for Leptomitidae, 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
37 references- Diversity and species abundance patterns of the early Cambrian (Series 2, Stage 3) Chengjiang Biota from China20
- Spatial variation in the diversity and composition of the Lower Cambrian (Series 2, Stage 3) Chengjiang Biota, Southwest China10
- Lower Cambrian leptomitids (Demospongea), Chengjiang, Yunnan10
- Sponges of the Middle Cambrian Burgess Shale and Stephen Formations, British Columbia8
- A Cambrian soft-bodied biota after the first Phanerozoic mass extinction7
- Taphonomy and Palaeoecology of the Early Cambrian Chengjiang Biota from Eastern Yunnan, China7
- Composition and tiering of the Cambrian sponge communities5
- Paleoecology of the Greater Phyllopod Bed community, Burgess Shale5
- Community palaeoecology of the early Cambrian Maotianshan Shale biota: Ecological dominance of priapulid worms5
- Early Cambrian Chengjiang fauna in eastern Yunnan, CHina4
- Lower Cambrian pediculate lingulids from Yunnan, China4
- The Qingjiang biota - A Burgess Shale-type fossil Lagerstätte from the early Cambrian of South China3
Each of the 121 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. 25 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 Tuponia Walcott, 1920
- Source
- GBIF
- Credit
- Yale Peabody Museum
- Licence
- CC0
- Commercial use
- the licence allows it
No 3D scan was found. Smithsonian Open Access, MorphoSource and Sketchfab were all searched.
This is what the site found, which is not the same as what exists.
Keep going
What may have been alongside itProtomonaxonida through timeFormations of the CambrianThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. De Laubenfels 1955