Amaurobiidae

Amaurobiidae is a family of three-clawed cribellate or ecribellate spiders found in crevices and hollows or under stones where they build retreats, and are often collected in pitfall traps. Unlidded burrows are sometimes quite obvious in crusty, loamy soil. They are difficult to distinguish from related spiders in other families, especially Agelenidae and Desidae. Their intra- and interfamilial relationships have been contentious.

Amaurobiidae

Marshal Hedin · 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
EntelegynaePBDB
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.

The one occurrence read is dated to somewhere between 37.71 Mya and 33.9 Mya, which is a dating window rather than a span.

Eocene — about 1 of 1 occurrenceEoceneOligocene — about 0 of 1 occurrence38–38 Mya — about 0.0 occurrences38–37 Mya — about 0.0 occurrences37–37 Mya — about 0.0 occurrences37–37 Mya — about 0.0 occurrences37–37 Mya — about 0.0 occurrences37–37 Mya — about 0.0 occurrences37–37 Mya — about 0.0 occurrences37–36 Mya — about 0.0 occurrences36–36 Mya — about 0.0 occurrences36–36 Mya — about 0.0 occurrences36–36 Mya — about 0.0 occurrences36–36 Mya — about 0.0 occurrences36–36 Mya — about 0.0 occurrences36–35 Mya — about 0.0 occurrences35–35 Mya — about 0.0 occurrences35–35 Mya — about 0.0 occurrences35–35 Mya — about 0.0 occurrences35–35 Mya — about 0.0 occurrences35–35 Mya — about 0.0 occurrences35–35 Mya — about 0.0 occurrences35–34 Mya — about 0.0 occurrences34–34 Mya — about 0.0 occurrences34–34 Mya — about 0.0 occurrences34–34 Mya — about 0.0 occurrences38.21 Mya33.4 Mya

1 occurrence of Amaurobiidae 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

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.

Amaurobiidae and its relatives

Eocene

Where Amaurobiidae and its relatives were recorded in the Eocene.

Found in the same rock

572 taxa

The Paleobiology Database records 1 site for Amaurobiidae, 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 the Paleobiology Database's own record for the work.

Media and terms

Media content2

Picture of Amaurobiidae

Credit
Marshal Hedin
Licence
CC BY-SA 2.5
Commercial use
the licence allows it

3D model

Source
Sketchfab
Credit
Spider
Licence
CC Attribution
Commercial use
cannot be read from the licence given — check the record

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 itEntelegynae through timeFormations of the EoceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Thorell 1870