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Base of the evolutionary tree for Pen Shells (Atrina)

← parent
  • Pen Shells (Atrina) (46 species)
    • Atrina stenotrochus
    • horse mussel (Atrina squamifera)
    • Atrina obesa
    • Atrina boreoborneensis
    • Atrina oldroydii
    • Atrina dentifera
    • Atrina serra
    • Atrina serrata
    • Atrina streptaxiformis
    • Atrina marquesana
    • Atrina tuberculosa
    • Atrina teramachii
    • Atrina tasmanica
    • stiff penshell (Atrina rigida)
    • Atrina ascotrochus
    • Atrina exusta
    • Atrina maura
    • Atrina strophostoma
    • Atrina ferelaevis
    • flag pen shell (Atrina vexillum)
    • Atrina perryae
    • Atrina lischkeana
    • Pen Shell (Atrina pectinata)
    • Atrina penna
    • Atrina kinoshitai
    • Atrina brevispira
    • Atrina dioryx
    • Atrina pini
    • Atrina japonica
    • Atrina paricostata
    • Atrina basteroti
    • Atrina assimilis
    • Atrina chinensis
    • Atrina cumingii
    • half-naked penshell (Atrina seminuda)
    • Atrina turgida
    • Atrina recta
    • Fan mussel (Atrina fragilis)
    • Atrina pertusa
    • Atrina chautardi
    • Atrina texta
    • Atrina zelandica
    • Atrina strangei
    • Atrina harrisoni
    • Atrina inflata
    • Atrina hystrix

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