Key Identification Features
- Tonicella undocaerulea, commonly known as the blue-lined chiton, has a distinct head plate marked with zigzagging white concentric lines.
- During the reproductive cycle, female chitons develop oocytes in their gonads through three distinct stages.
- This species is well known for its high phenotypic variation, so much that some taxonomic guides suggest that if all collected individuals show the exact same coloration, the species cannot be C.
- While white wavy lines appear on all of its valves, the prominent distinctive white lines that identify this species are only present on the second through seventh valves.
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