(For the tree oyster mushroom, see Pleurotus ostreatus.)
Isognomon Temporal range:
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Live Isognomon sp. under a rock in Kona District, Hawaii | |
Scientific classification
![]() | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Mollusca |
Class: | Bivalvia |
Order: | Pteriida |
Family: | Isognomonidae |
Genus: |
Isognomon Lightfoot, 1786 |
Type species | |
Ostrea perna Linnaeus, 1767
| |
Species | |
See text | |
Synonyms | |
|
Isognomon is a genus of marine bivalve mollusks which is related to the pearl oysters. [1]
Isognomon is known in the fossil record from the Permian period to the Quaternary period (age range: 254.0 to 0.012 million years ago). Fossils of species within this genus have been found all over the world. [2]
This genus is placed in the family Isognomonidae. However previous molecular phylogeny studies have shown that these tree oysters belong in the family Pteriidae. [3] [4]
These oysters grow to be about 4.75 inches (12.1 cm) in overall length, producing a highly irregular shell with a blue-gray and often heavily encrusted exterior but a smooth and pearly white interior. They use their byssus to completely immobilize themselves to the roots of mangrove trees, corals, and other substrates. [5] It is because of the preference for mangroves that these are sometimes called tree oysters [6]
Extinct species within this genus include: [2]
(For the tree oyster mushroom, see Pleurotus ostreatus.)
Isognomon Temporal range:
| |
---|---|
![]() | |
Live Isognomon sp. under a rock in Kona District, Hawaii | |
Scientific classification
![]() | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Mollusca |
Class: | Bivalvia |
Order: | Pteriida |
Family: | Isognomonidae |
Genus: |
Isognomon Lightfoot, 1786 |
Type species | |
Ostrea perna Linnaeus, 1767
| |
Species | |
See text | |
Synonyms | |
|
Isognomon is a genus of marine bivalve mollusks which is related to the pearl oysters. [1]
Isognomon is known in the fossil record from the Permian period to the Quaternary period (age range: 254.0 to 0.012 million years ago). Fossils of species within this genus have been found all over the world. [2]
This genus is placed in the family Isognomonidae. However previous molecular phylogeny studies have shown that these tree oysters belong in the family Pteriidae. [3] [4]
These oysters grow to be about 4.75 inches (12.1 cm) in overall length, producing a highly irregular shell with a blue-gray and often heavily encrusted exterior but a smooth and pearly white interior. They use their byssus to completely immobilize themselves to the roots of mangrove trees, corals, and other substrates. [5] It is because of the preference for mangroves that these are sometimes called tree oysters [6]
Extinct species within this genus include: [2]