Pachymelania

Pachymelania is a genus of freshwater snails, gastropod mollusks in the family Hemisinidae.

Pachymelania

Hectonichus · 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
ThiaridaePBDB
Diet
grazerPBDB, for Cerithioidea
Life habit
epifaunalPBDB, for Cerithioidea
Motility
actively mobilePBDB, for Cerithioidea
Vision
limitedPBDB, for Gastropoda
Environment
freshwaterPBDB, for Thiaridae

Time the record covers

At least 34 million years on record.

The record covers at least 93.9 Mya to 59.24 Mya. No occurrence read is dated outside 100.5 Mya to 56 Mya.

Early Cretaceous — about 0 of 19 occurrencesLate Cretaceous — about 18 of 19 occurrencesLate CretaceousPaleocene — about 1 of 19 occurrencesPaleoceneEocene — about 0 of 19 occurrences101–100 Mya — about 0.1 occurrences100–98 Mya — about 0.2 occurrences98–97 Mya — about 0.2 occurrences97–95 Mya — about 0.2 occurrences95–94 Mya — about 0.2 occurrences91–89 Mya — about 0.2 occurrences89–88 Mya — about 0.4 occurrences88–86 Mya — about 0.4 occurrences86–84 Mya — about 0.1 occurrences84–83 Mya — about 0.1 occurrences83–81 Mya — about 0.1 occurrences81–80 Mya — about 0.1 occurrences80–78 Mya — about 0.1 occurrences78–77 Mya — about 0.1 occurrences77–75 Mya — about 0.1 occurrences75–74 Mya — about 0.1 occurrences74–72 Mya — about 0.4 occurrences72–71 Mya — about 4 occurrences71–69 Mya — about 4 occurrences69–67 Mya — about 4 occurrences67–66 Mya — about 4 occurrences60–58 Mya — about 0.3 occurrences58–57 Mya — about 0.5 occurrences57–55 Mya — about 0.2 occurrences93.9 Mya59.24 Mya101.4 Mya55.1 Mya

19 occurrences of Pachymelania on record, most of them in the Late Cretaceous. 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

19 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

7 formations

Escondido — 29.24°N, 99.23°WEscondido — 29.25°N, 99.24°WEscondido — 29.06°N, 100.06°WEscondido — 28.96°N, 100.22°WEscondido — 28.86°N, 100.23°WEscondido — 28.88°N, 100.26°WEscondido — 28.71°N, 100.46°WEscondido — 28.59°N, 100.40°WOwl Creek — 34.88°N, 88.87°WProvidence — 31.76°N, 85.13°WCorsicana Marl — 31.74°N, 96.61°WEnglishtown — 39.55°N, 75.65°WDunvegan — 56.25°N, 118.95°WKolosh — 37.22°N, 42.83°E

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The named rock units Pachymelania has been recovered from, largest first. Drawn where the rock is now, not where it formed. 1 occurrence has no formation on record, which is common for older literature.

Pachymelania and its relatives

Late Cretaceous

Where Pachymelania and its relatives were recorded in the Late Cretaceous.

Found in the same rock

221 taxa

The Paleobiology Database records 18 sites for Pachymelania, 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

6 references

Each of the 19 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 Pachymelania

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

No 3D scan of Pachymelania 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 itThiaridae through timeFormations of the Late CretaceousThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. White 1895