Madagascarchaea gracilicollis

Madagascarchaea gracilicollis is a member of the family Archaeidae, assassin spiders. It is merely 2 mm long and catches other spiders with venomous fangs at the end of its hugely elongated jaws (chelicerae).

Madagascarchaea gracilicollis

Sarefo · CC BY-SA 3.0 · 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
MadagascarchaeaPBDB
Life habit
solitaryPBDB, for Arachnida
Motility
actively mobilePBDB, for Arachnida
Environment
terrestrialPBDB, for Arachnida

Time the record covers

At most 12 thousand years on record.

Every occurrence read is dated to somewhere between 11.7 ka and 0 Mya, and nothing in the dating separates them, so that window is what the record shows rather than a span.

Pleistocene — about 0 of 2 occurrencesHolocene — about 2 of 2 occurrences17 ka–0 Mya — about 2 occurrences512 ka0 Mya

2 occurrences of Madagascarchaea gracilicollis on record, most of them in the Holocene. The Paleobiology Database records this as a living group. 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

2 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.

Madagascarchaea gracilicollis and its relatives

Holocene

Where Madagascarchaea gracilicollis and its relatives were recorded in the Holocene.

Found in the same rock

38 taxa

The Paleobiology Database records 2 sites for Madagascarchaea gracilicollis, 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

2 references

Each of the 2 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. 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 Madagascarchaea gracilicollis

Credit
Sarefo
Licence
CC BY-SA 3.0
Commercial use
the licence allows it

No 3D scan of Madagascarchaea gracilicollis was found in MorphoSource and Sketchfab.

Smithsonian Open Access was 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 itMadagascarchaea through timeFormations of the HoloceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. (Millot 1948)