From: Shedding light: a phylotranscriptomic perspective illuminates the origin of photosymbiosis in marine bivalves
Node
Taxa
Min. node age (MYA)
Source
A
Fragum fragum
3.6
[77]
B
Americardia media
7.2
[78]
C
Tridacna
23
[79]
D
Vasticardium
41.2
[80]