Pycnodonteinae
The Gryphaeidae, common name the foam oysters or honeycomb oysters, are a family of marine bivalve mollusks. This family of bivalves is very well represented in the fossil record, however the number of living species is very few.
All species have shells cemented to a substrate. Shells are considered brittle, inequivalve, with the left, lower (cemented) valve convex and the right (upper, non-cemented) valve flat or slightly concave.
9 branches of this subfamily, most-observed first
Hyotissa
genusHyotissa
Cretaceous Devil's Toenail Oysters
genusTexigryphaea
Neopycnodonte
genusNeopycnodonte
Pycnodonte
genusPycnodonte
Empressostrea
genusEmpressostrea
Argutostrea
genusArgutostrea
Crenostrea
genusCrenostrea
Pycnogryphaea
genusPycnogryphaea
Gigantostrea
genusGigantostrea
Where it lives
Recorded sightings
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geo-referenced records in GBIF, from museums, herbaria and field observers.
Drag the globe to turn it. Dots are where records exist, not a range map; darker means more records.
In the stacks
Searching the stacks…
Every page naming Pycnodonteinae in the Biodiversity Heritage Library →
This page is assembled live from iNaturalist, GBIF, Wikipedia, the Source Library and the Internet Archive. It is not yet part of the hand-edited codex. iNaturalist taxon 871440.