Hemidonax
Hemidonax is a genus of bivalve molluscs. It is the only genus in the family Hemidonacidae, which is the only family in the superfamily Hemidonacoidea in the order Venerida.
No picture of Hemidonax was found. Wikipedia, Wikidata and iDigBio were searched and had none. Smithsonian Open Access did not answer, so this is what the others held rather than everything there is. GBIF was asked, and what came back is not recorded: nothing, or a picture this site could not tie to Hemidonax, or no answer at all. This entry cannot say which.
On record
Recorded, not inferred- Sits inside
- HemidonacidaePBDB
- Diet
- suspension feederPBDB, for Venerida
- Life habit
- infaunalPBDB, for Venerida
- Motility
- facultatively mobilePBDB, for Venerida
- Vision
- blindPBDB, for Bivalvia
Time the record covers
At least 2.4 million years on record.
The record covers at least 2.58 Mya to 129 ka. No occurrence read is dated outside 3.6 Mya to 11.7 ka.
3 occurrences of Hemidonax on record. 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
3 occurrences- Pliocene67%
- Pleistocene33%
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
2 formations
- Ascot Formation2
- Tims Thicket/Kooallup Limestone Formation1
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The named rock units Hemidonax has been recovered from, largest first. Drawn where the rock is now, not where it formed.
Found in the same rock
127 taxa- Bedeva paivae3 sites
- Bittium3 sites
- Glycymeris3 sites
- Leiopyrga3 sites
- Mactra3 sites
- Natica gualteriana3 sites
- Tawera3 sites
- Alaba2 sites
- Arcopsis2 sites
- Belloliva2 sites
- Carditidae2 sites
- Clanculus2 sites
- Conus2 sites
- Epicodakia2 sites
- Haliotis2 sites
- Hypotrochus monachus2 sites
- Lamarcka ventricosa2 sites
- Leionucula2 sites
- Limopsis2 sites
- Macomona basedowi2 sites
- Nassarius2 sites
- Nuculana (Scaeoleda)2 sites
- Oliva (Strephona) australis2 sites
- Placamen2 sites
The Paleobiology Database records 3 sites for Hemidonax, 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- Pliocene-Pleistocene coastal events and history along the western margin of Australia2
- New Pleistocene and Holocene stratigraphic units in the Yalgorup Plain area, southern Swan Costal Plain1
Each of the 3 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 content0
No picture of Hemidonax was found. Wikipedia, Wikidata and iDigBio were searched and had none.
Smithsonian Open Access did not answer, so this is what the others held rather than everything there is.
GBIF was asked, and what came back is not recorded: nothing, or a picture this site could not tie to Hemidonax, or no answer at all. This entry cannot say which.
No 3D scan of Hemidonax 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
- Source
- Wikipedia, “Hemidonax”
- 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 itHemidonacidae through timeThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Mörch 1871