Diploholcaspis

Diploholcaspis is an extinct genus of galeaspid jawless fish from Guangxi, China. Its fossils are known from the middle section of the Dayaoshan Group which dates to the Lower Devonian, making it the first early vertebrate to be described from the group. Diploholcaspis differs from other galeaspids due to the poorly developed sensory canal system represented by only a single pair of lateral transverse canals on the headshield. Due to this and a combination of features such as the headshield shape and the ornamentation, Diploholcaspis is regarded as incertae sedis within Galeaspida. Only one species is assigned to the genus: D. daleensis.

No picture of Diploholcaspis was found. Wikipedia, Wikidata and iDigBio were searched and had none. Smithsonian Open Access did not answer, so this is what the others held rather than everything there is. GBIF was asked, and what came back is not recorded: nothing, or a picture this site could not tie to Diploholcaspis, or no answer at all. This entry cannot say which.

On record

Recorded, not inferred
Sits inside
GaleaspidaPBDB
Motility
actively mobilePBDB, for Chordata

Time the record covers

At most 6.6 million years on record.

The one occurrence read is dated to somewhere between 419.62 Mya and 413.02 Mya, which is a dating window rather than a span.

Silurian — about 0 of 1 occurrenceDevonian — about 1 of 1 occurrenceDevonian420–420 Mya — about 0.0 occurrences420–419 Mya — about 0.0 occurrences419–419 Mya — about 0.0 occurrences419–419 Mya — about 0.0 occurrences419–419 Mya — about 0.0 occurrences419–418 Mya — about 0.0 occurrences418–418 Mya — about 0.0 occurrences418–418 Mya — about 0.0 occurrences418–418 Mya — about 0.0 occurrences418–417 Mya — about 0.0 occurrences417–417 Mya — about 0.0 occurrences417–417 Mya — about 0.0 occurrences417–417 Mya — about 0.0 occurrences417–416 Mya — about 0.0 occurrences416–416 Mya — about 0.0 occurrences416–416 Mya — about 0.0 occurrences416–416 Mya — about 0.0 occurrences416–415 Mya — about 0.0 occurrences415–415 Mya — about 0.0 occurrences415–415 Mya — about 0.0 occurrences415–415 Mya — about 0.0 occurrences415–414 Mya — about 0.0 occurrences414–414 Mya — about 0.0 occurrences414–414 Mya — about 0.0 occurrences414–414 Mya — about 0.0 occurrences414–413 Mya — about 0.0 occurrences413–413 Mya — about 0.0 occurrences413–413 Mya — about 0.0 occurrences420.1 Mya412.5 Mya

1 occurrence of Diploholcaspis on record, most of them in the Devonian. 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

1 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

1 formation

Xitun — 25.49°N, 103.80°E

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The named rock units Diploholcaspis has been recovered from, largest first. Drawn where the rock is now, not where it formed.

Diploholcaspis and its relatives

Devonian

Where Diploholcaspis and its relatives were recorded in the Devonian.

Found in the same rock

52 taxa

The Paleobiology Database records 1 site for Diploholcaspis, 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

1 reference

Each of the 1 occurrence 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. Each entry links to doi.org. Relayed as the Paleobiology Database holds them, not checked against what they resolve to.

Media and terms

Media content0

No picture of Diploholcaspis was found. Wikipedia, Wikidata and iDigBio were searched and had none.

Smithsonian Open Access did not answer, so this is what the others held rather than everything there is.

GBIF was asked, and what came back is not recorded: nothing, or a picture this site could not tie to Diploholcaspis, or no answer at all. This entry cannot say which.

No 3D scan of Diploholcaspis 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.

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 itGaleaspida through timeFormations of the DevonianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Wang et al. 2009