Mastigoteuthis glaukopis group
- Mastigoteuthis atlantica Joubin, 1933
- Mastigoteuthis famelica (Berry, 1909)
- Mastigoteuthis glaukopis Chun, 1908
Introduction
Only one species (M. famelica) in the M. glaukopis group is well known. At present, each species is thought to occupy a different ocean: M. glaukopis- Indian Ocean; M. famelica - Pacific Ocean; M. atlantica - Atlantic Ocean.
Brief diagnosis:
Species of Mastigoteuthis ...
- with large eyelid photophore.
- without other photophores.
Characteristics
- Arms
- Arms III distinctly longer than arms I.
- Arms III distinctly longer than arms I.
- Tentacles
- Little variation in sucker size over most of tentacular club.
- Club suckers large; reach a diameter of 0.3-0.4 mm in large squid.
- Head
- Funnel pocket present.
- Funnel pocket present.
- Funnel
- Funnel locking-apparatus ear shaped with large tragus and virtually no antitragus; posterior margin not undercut.
- Funnel locking-apparatus ear shaped with large tragus and virtually no antitragus; posterior margin not undercut.
- Fins
- Fins slightly longer than broad (except, apparently in M. glaukopis).
- Fins slightly longer than broad (except, apparently in M. glaukopis).
- Tubercules
- Tubercules absent from integument except in paralarvae.
- Tubercules absent from integument except in paralarvae.
- Photophores and pigmentation
- Large round to oval photophore located on the anteroventral margin of each eyelid.
- No ocular or integumental photophores.
- Most pigment in closely-spaced chromatophores.
Comments
M. glaukopis is known only from the holotype which is small (37 mm ML including tail) and has lost all trace of pigment. At present its geographical distribution is the only feature known to separate it from the other two species. M. atlantica is also poorly known, however, it has relatively large trabeculate protective membranes on the tentacular clubs which separates it from M. famelica.
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- First online 19 November 2007
- Content changed 19 November 2007
Citing this page:
Tree of Life Web Project. 2007. Mastigoteuthis glaukopis group. Version 19 November 2007 (under construction). http://tolweb.org/Mastigoteuthis_glaukopis_group/65305/2007.11.19 in The Tree of Life Web Project, http://tolweb.org/