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Planctoteuthis levimana was originally described as Mastigoteuthis levimana, based on two specimens, one of which was in fragments. It was placed in the synonomy of Planctoteuthis by Young, 1991. The genus Planctoteuthis was not recognized until 1912 (Pfeffer, 1912) and P. levimana is now the oldest species assigned to this genus. This description is based on two specimens, one of which is badly damaged but has a single tentacle with an intact club (see Young, et al., 2006). The other is in exceptionally good condition although arm tips and tentacular clubs are missing.
A Planctoteuthis ...
- with long, slender tentacular club, without keel.
- with double but unequal knobs compose antitragus in funnel locking-apparatus.