Microdrillia

Microdrillia is a genus of very small sea snails, marine gastropod mollusks in the family Borsoniidae.

Microdrillia

MNHN Lozouet 2018 Project:RECOLNAT · CC BY 4.0 · 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
BorsoniidaePBDB
Diet
carnivorePBDB, for Conoidea
Life habit
epifaunalPBDB, for Conoidea
Motility
actively mobilePBDB, for Conoidea
Vision
limitedPBDB, for Gastropoda

Time the record covers

At least 45 million years on record.

The record covers at least 48.07 Mya to 2.58 Mya. No occurrence read is dated outside 56 Mya to 774 ka.

Paleocene — about 0 of 201 occurrencesEocene — about 132 of 201 occurrencesEoceneOligocene — about 20 of 201 occurrencesOligoceneMiocene — about 38 of 201 occurrencesMiocenePliocene — about 10 of 201 occurrencesPleistocene — about 1 of 201 occurrences57–55 Mya — about 2 occurrences55–53 Mya — about 5 occurrences53–51 Mya — about 5 occurrences51–49 Mya — about 5 occurrences49–48 Mya — about 5 occurrences48–46 Mya — about 6 occurrences46–44 Mya — about 6 occurrences44–42 Mya — about 6 occurrences42–40 Mya — about 30 occurrences40–38 Mya — about 49 occurrences38–36 Mya — about 10 occurrences36–34 Mya — about 1 occurrence34–32 Mya — about 4 occurrences32–30 Mya — about 5 occurrences30–29 Mya — about 5 occurrences29–27 Mya — about 4 occurrences27–25 Mya — about 0.9 occurrences25–23 Mya — about 0.9 occurrences23–21 Mya — about 0.8 occurrences21–19 Mya — about 2 occurrences19–17 Mya — about 3 occurrences17–15 Mya — about 4 occurrences15–13 Mya — about 5 occurrences13–11 Mya — about 6 occurrences11–9.5 Mya — about 7 occurrences9.5–7.6 Mya — about 7 occurrences7.6–5.7 Mya — about 2 occurrences5.7–3.8 Mya — about 0.1 occurrences3.8–1.9 Mya — about 10 occurrences1.9–0 Mya — about 0.6 occurrences48.07 Mya2.58 Mya57 Mya0 Mya

201 occurrences of Microdrillia 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

201 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

35 formations

Cook Mountain — 31.25°N, 95.73°WCook Mountain — 32.32°N, 89.03°WCook Mountain — 32.17°N, 88.83°WCook Mountain — 32.32°N, 89.16°WCook Mountain — 32.04°N, 88.73°WCook Mountain — 30.67°N, 96.37°WCook Mountain — 31.32°N, 95.46°WCook Mountain — 30.86°N, 96.36°WCook Mountain — 31.35°N, 93.65°WCook Mountain — 31.76°N, 92.96°WCook Mountain — 31.03°N, 95.63°WCook Mountain — 31.12°N, 95.90°WCook Mountain — 30.62°N, 96.56°WCook Mountain — 31.20°N, 95.73°WCook Mountain — 30.63°N, 96.54°WCook Mountain — 31.35°N, 95.52°WCook Mountain — 30.07°N, 97.08°WCook Mountain — 29.99°N, 97.09°WReklaw — 30.88°N, 95.38°WReklaw — 30.11°N, 97.32°WReklaw — 30.01°N, 97.26°WReklaw — 30.80°N, 96.72°WGatun — 9.38°N, 79.82°WGatun — 9.35°N, 79.83°WGatun — 9.27°N, 79.92°WWeches — 30.00°N, 97.15°WWeches — 30.68°N, 96.58°WWeches — 31.21°N, 96.02°WWeches — 31.11°N, 96.28°WWeches — 31.00°N, 96.83°WWeches — 31.59°N, 94.84°WWeches — 31.25°N, 96.12°WRed Bluff — 30.98°N, 88.73°WRed Bluff — 31.81°N, 88.69°WRed Bluff — 31.66°N, 88.66°WMoodys Branch — 32.01°N, 92.00°WMoodys Branch — 32.30°N, 90.18°WMoodys Branch — 31.26°N, 93.82°WMoodys Branch — 31.66°N, 92.90°WLisbon — 31.76°N, 88.10°WLisbon — 31.84°N, 88.25°WLisbon — 31.50°N, 87.80°WCrockett — 30.63°N, 96.54°WCrockett — 30.67°N, 96.37°WCrockett — 31.35°N, 95.51°WByram — 32.18°N, 90.25°WByram — 32.41°N, 90.84°WByram — 31.97°N, 89.43°WHatchetigbee Bluff — 31.93°N, 88.06°WHatchetigbee Bluff — 31.93°N, 87.75°WYegua — 30.36°N, 96.82°WYegua — 30.30°N, 96.96°WYegua — 30.24°N, 96.99°WStone City — 30.53°N, 96.69°WStone City — 30.63°N, 96.33°WSelsey — 50.73°N, 0.78°WChipola — 30.44°N, 85.19°WMint Spring — 31.98°N, 89.42°WMint Spring — 31.97°N, 89.50°WMint Spring — 32.17°N, 90.18°WBowden — 17.88°N, 76.28°WEscudo de Veraguas — 9.10°N, 81.57°WGosport Sand — 31.54°N, 87.52°WGosport Sand — 31.55°N, 87.91°WAgueguexquite — 18.14°N, 94.44°WAgueguexquite — 18.07°N, 94.32°WKosciusko — 32.04°N, 88.73°WYazoo — 32.47°N, 90.29°WYazoo — 31.63°N, 91.82°WShoal River — 30.72°N, 86.12°WShoal River — 30.69°N, 86.65°WBreda — 51.95°N, 6.75°EYazoo Clay — 32.41°N, 90.24°W

Loading coastlines…

The named rock units Microdrillia has been recovered from, largest first. Drawn where the rock is now, not where it formed. 11 further formations hold fewer occurrences each and are not listed. 10 occurrences have no formation on record, which is common for older literature.

Microdrillia and its relatives

Eocene

Where Microdrillia and its relatives were recorded in the Eocene.

Found in the same rock

1,874 taxa

The Paleobiology Database records 114 sites for Microdrillia, and this reads all of them. Of that, one read hit the database's own return limit, so every count below is a floor rather than a total. 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

34 references

Each of the 201 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. 22 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 Microdrillia

Credit
MNHN Lozouet 2018 Project:RECOLNAT
Licence
CC BY 4.0
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 itBorsoniidae through timeFormations of the EoceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Casey 1903