Ummidia

Ummidia is a genus of mygalomorph spiders in the family Halonoproctidae, and was first described by Tamerlan Thorell in 1875. It is a genus of small to large trapdoor spiders that are usually black to very dark brown in color. It is a widely-distributed genus found in the southwestern Mediterranean, Central Asia, and in the Americas from Ohio south to Brazil. They live in hard-to-find silk-lined burrows hidden in leaf litter.

Ummidia

Uncredited · CC BY-SA 2.5 · 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
UmmidiinaePBDB
Life habit
solitaryPBDB, for Arachnida
Motility
actively mobilePBDB, for Arachnida
Environment
terrestrialPBDB, for Arachnida

Time the record covers

At most 3.9 million years on record.

Every occurrence read is dated to somewhere between 37.71 Mya and 33.9 Mya, and nothing in the dating separates them, so that window is what the record shows rather than a span.

Eocene — about 10 of 10 occurrencesEoceneOligocene — about 0 of 10 occurrences38–38 Mya — about 0.4 occurrences38–37 Mya — about 0.4 occurrences37–37 Mya — about 0.4 occurrences37–37 Mya — about 0.4 occurrences37–37 Mya — about 0.4 occurrences37–37 Mya — about 0.4 occurrences37–37 Mya — about 0.4 occurrences37–36 Mya — about 0.4 occurrences36–36 Mya — about 0.4 occurrences36–36 Mya — about 0.4 occurrences36–36 Mya — about 0.4 occurrences36–36 Mya — about 0.4 occurrences36–36 Mya — about 0.4 occurrences36–35 Mya — about 0.4 occurrences35–35 Mya — about 0.4 occurrences35–35 Mya — about 0.4 occurrences35–35 Mya — about 0.4 occurrences35–35 Mya — about 0.4 occurrences35–35 Mya — about 0.4 occurrences35–35 Mya — about 0.4 occurrences35–34 Mya — about 0.4 occurrences34–34 Mya — about 0.4 occurrences34–34 Mya — about 0.4 occurrences34–34 Mya — about 0.4 occurrences38.21 Mya33.4 Mya

10 occurrences of Ummidia on record, most of them in the Eocene. The Paleobiology Database records this as a living group, and the chart stops with its fossils rather than at the present. 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

10 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.

Ummidia and its relatives

Eocene

Where Ummidia and its relatives were recorded in the Eocene.

Found in the same rock

1,063 taxa

The Paleobiology Database records 7 sites for Ummidia, 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

3 references

Each of the 10 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. Each entry links to the Paleobiology Database's own record for the work.

Media and terms

Media content1

Picture of Ummidia

Credit
nobody named on the record
Licence
CC BY-SA 2.5
Commercial use
the licence allows it

No 3D scan was found. Smithsonian Open Access, MorphoSource and Sketchfab were all searched.

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 itUmmidiinae through timeFormations of the EoceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Thorell 1875