Letognathus hardingi

Letognathus is a genus of rhizodont tetrapodomorph that lived during the Carboniferous period. Its remains come from the Blue Beach Member of the Horton Bluff Formation, near Hantsport, Nova Scotia. Like most rhizodonts, it was of relatively large size, had a large recurved fang at the symphysis of the lower jaw, and a row of three coronoid fangs along the length of the jaw in addition to its marginal dentition. Letognathus is important for rhizodont systematics because it retains a number of primitive features, such as ossified Meckel's cartilage, are not found in the genera Rhizodus and Strepsodus.

No picture of Letognathus hardingi was found. Wikipedia, Wikidata, iDigBio and Smithsonian Open Access were searched and had none. GBIF was asked, and what came back is not recorded: nothing, or a picture this site could not tie to Letognathus hardingi, or no answer at all. This entry cannot say which.

On record

Recorded, not inferred
Sits inside
LetognathusPBDB
Motility
actively mobilePBDB, for Osteichthyes

Time the record covers

At most 13 million years on record.

The one occurrence read is dated to somewhere between 358.86 Mya and 346.7 Mya, which is a dating window rather than a span.

Devonian — about 0 of 1 occurrenceCarboniferous — about 1 of 1 occurrenceCarboniferous359–358 Mya — about 0.0 occurrences358–358 Mya — about 0.0 occurrences358–358 Mya — about 0.0 occurrences358–357 Mya — about 0.0 occurrences357–357 Mya — about 0.0 occurrences357–356 Mya — about 0.0 occurrences356–356 Mya — about 0.0 occurrences356–355 Mya — about 0.0 occurrences355–355 Mya — about 0.0 occurrences355–355 Mya — about 0.0 occurrences355–354 Mya — about 0.0 occurrences354–354 Mya — about 0.0 occurrences354–353 Mya — about 0.0 occurrences353–353 Mya — about 0.0 occurrences353–352 Mya — about 0.0 occurrences352–352 Mya — about 0.0 occurrences352–351 Mya — about 0.0 occurrences351–351 Mya — about 0.0 occurrences351–351 Mya — about 0.0 occurrences351–350 Mya — about 0.0 occurrences350–350 Mya — about 0.0 occurrences350–349 Mya — about 0.0 occurrences349–349 Mya — about 0.0 occurrences349–348 Mya — about 0.0 occurrences348–348 Mya — about 0.0 occurrences348–348 Mya — about 0.0 occurrences348–347 Mya — about 0.0 occurrences347–347 Mya — about 0.0 occurrences359.4 Mya346.2 Mya

1 occurrence of Letognathus hardingi on record, most of them in the Carboniferous. 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.

Found in

1 formation

Horton Bluff — 45.10°N, 64.22°W

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The named rock units Letognathus hardingi has been recovered from, largest first. Drawn where the rock is now, not where it formed.

Letognathus hardingi and its relatives

Carboniferous

Where Letognathus hardingi and its relatives were recorded in the Carboniferous.

Found in the same rock

No other named taxon is catalogued from that site.

The Paleobiology Database records 1 site for Letognathus hardingi, and this reads all of them.

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 doi.org. Relayed as the Paleobiology Database holds them, not checked against what they resolve to.

Media and terms

Media content0

No picture of Letognathus hardingi was found. Wikipedia, Wikidata, iDigBio and Smithsonian Open Access were searched and had none.

GBIF was asked, and what came back is not recorded: nothing, or a picture this site could not tie to Letognathus hardingi, or no answer at all. This entry cannot say which.

No 3D scan of Letognathus hardingi was found in Smithsonian Open Access and Sketchfab.

MorphoSource 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 itLetognathus through timeFormations of the CarboniferousThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. (Dawson 1868)