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Pyroteuthidae Visceral Photophores

Richard E. Young and Katharina M. Mangold (1922-2003)

The visceral photophores of the two genera are similar in arrangement but the branchial photophores are much larger in Pterygioteuthis (left illustration), and the anterior abdominal photophores in Pyroteuthis (middle illustration) consist of three photophores rather than one.

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Figure. Left - Immature Pterygioteuthis microlampas. Middle - Mature female Pyroteuthis addolux. Right - Labeled diagram drawn from the Pyroteuthis photograph. Note the difference in the sizes of the oviducal glands suggesting that only the right oviduct is functional. The most posterior abdominal photophore of Pterygioteuthis and the two most posterior abdominal photophores of Pyroteuthis are not within the bounds of these photos.

Click on an image to view larger version & data in a new window
Click on an image to view larger version & data in a new window

Figure. A closer look (photomicrographs) at the visceral photophores of Pterygioteuthis (left to right: branchial, anterior abdominal, anal photophores) shows that the major photophores have very different structures. In Pyroteuthis the branchial and anterior abdominal photophores appear similar in structure (see top photo).

About This Page
Photographs and illustration by R. E. Young

University of Hawaii, Honolulu, HI, USA

Katharina M. Mangold (1922-2003)
Laboratoire Arago, Banyuls-Sur-Mer, France

Page: Tree of Life Pyroteuthidae Visceral Photophores Authored by Richard E. Young and Katharina M. Mangold (1922-2003). The TEXT of this page is licensed under the Creative Commons Attribution-NonCommercial License - Version 3.0. Note that images and other media featured on this page are each governed by their own license, and they may or may not be available for reuse. Click on an image or a media link to access the media data window, which provides the relevant licensing information. For the general terms and conditions of ToL material reuse and redistribution, please see the Tree of Life Copyright Policies.

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