Metagnostidae

Dwergenpaartje · CC BY-SA 3.0 · via Wikidata/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
- CondylopygoideaPBDB
- Diet
- detritivorePBDB, for Agnostida
- Life habit
- epifaunalPBDB, for Agnostida
- Motility
- slow-movingPBDB, for Agnostida
- Vision
- blindPBDB
Time the record covers
At least 60 million years on record.
The record covers at least 505.3 Mya to 445.2 Mya. No occurrence read is dated outside 509.7 Mya to 443.1 Mya.
610 occurrences of Metagnostidae 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
610 occurrences- Cambrian10%
- Ordovician90%
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
200 formations
- Dawan Formation24
- Santa Rosita Formation · Salta Group21
- Table Cove Formation · Table Head Group20
- Tangtou Formation17
- Zitai Formation15
- Edinburg Formation10
Loading coastlines…
The named rock units Metagnostidae has been recovered from, largest first. Drawn where the rock is now, not where it formed. 176 further formations hold fewer occurrences each and are not listed. 75 occurrences have no formation on record, which is common for older literature.
Metagnostidae and its relatives
OrdovicianWhere Metagnostidae and its relatives were recorded in the Ordovician.
Found in the same rock
1,881 taxa- Geragnostus107 sites
- Trinodus67 sites
- Cyclopyge47 sites
- Nileus47 sites
- Illaenus45 sites
- Remopleurides43 sites
- Ampyx39 sites
- Lonchodomas33 sites
- Shumardia33 sites
- Ovalocephalus31 sites
- Dionide26 sites
- Nankinolithus25 sites
- Symphysurus25 sites
- Asaphellus24 sites
- Didymograptus24 sites
- Euloma23 sites
- Corrugatagnostus22 sites
- Telephina20 sites
- Climacograptus18 sites
- Christiania17 sites
- Birmanites16 sites
- Niobe16 sites
- Sowerbyella16 sites
- Arthrorhachis15 sites
The Paleobiology Database records 502 sites for Metagnostidae, 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
182 references- Ordovician trilobites of Argentina49
- Agnostid trilobites from the Upper Ordovician of Sweden and Bornholm, Denmark24
- Early Ordovician (Arenig) trilobite palaeoecology and palaeobiogeography of the South China Plate21
- Trilobites of the Ordovician Table Head Formation, western Newfoundland17
- Middle Cambrian agnostids: systematics and biostratigraphy.16
- On the Early Ordovician of Sweden stratigraphy and fauna13
- The biostratigraphy of the Ordovician of Bohemia12
- Ordovician (Darriwilian-early Katian) trilobite faunas of northwestern Tarim, Xinjiang, China11
- Stratigraphic Summary of the Southwestern Region of China11
- Cambrian and Ordovician trilobites from Herault, southern France11
- Arenig trilobite associations of Daping, Yichang, Hubei, South China10
- Biostratigraphy of the Yangtze Gorge Area. Part (2) Early Paleozoic Era10
Each of the 610 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. 170 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 Metagnostidae
- Source
- Wikidata/Commons
- Credit
- Dwergenpaartje
- Licence
- CC BY-SA 3.0
- Commercial use
- the licence allows it
No 3D scan of Metagnostidae was found in Sketchfab.
Smithsonian Open Access and MorphoSource were not reached for this taxon, so this list is what the others held rather than everything there is.
This is what the site found, which is not the same as what exists.
Keep going
What may have been alongside itCondylopygoidea through timeFormations of the OrdovicianThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Jaekel 1909