Cephalopod fin
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Cephalopod fins, sometimes known as wings, are paired flap-like locomotory appendages. They are found in ten-limbed cephalopods as well as in the eight-limbed cirrate octopuses and vampire squid. Many
Measurement of fin angle in a squid with sagittate fins
Time series showing up-and-down fin movement in an individual of the cirrate octopod Cirroteuthis muelleri
Adult Grimalditeuthis bonplandi with "secondary fins" supported on a well-developed tail
Ventral (left) and dorsal aspects of Onychoteuthis banksii, showing classic sagittate fins
Trachyteuthis
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Trachyteuthis is an extinct genus of octobrachian cephalopod comprising nine species with an almost global distribution, living from the Callovian to the Cenomanian age of the Mesozoic. While similar
Morphology, terminology and measurements of a vampyropod gladius. A. Trachyteuthis. B. Loligosepia
Juvenile Vampyroteuthis showing two distinct pairs of mantle fins, similar to Trachyteuthis
Small fossil of a paralarval cephalopod from Solnhofen. This animal may be related to Trachyteuthis
A. T. hastiformis B. T. nusplingensis C. T.teudopsiformis D. Reconstruction of the gladius of T. covacevichi E. Reconstruction of T. hastiformis; F. Reconstruction of T. nusplingensis; G. Reconstruction of T. teudopsiformis