Mastigoteuthis magnaMichael Vecchione and Richard E. Young
Joubin 1913 (as redescribed in 1920) based M. magna on a single specimen of 160 mm ML from the Sargasso Sea. It appears now to be one of the more common species of Mastigoteuthis in the North Atlantic (personal observations).
A mastigoteuthid ...
- without photophores.
- with flask-shaped funnel locking-groove.
- with fin length equal to fin width.
- Arm suckers with smooth inner rings.
- Club length 80% of tentacle length (Joubin, 1920).
- Proximally suckers in narrow band that gradually broadens; at mid-club suckers cover 3/4 of tentacle (Joubin, 1920).
- Club suckers minute with smooth inner rings (Joubin, 1920).
- Mantle component of the funnel locking-apparatus a "rectilinear ridge narrow anteriorly and slightly wider posteriorly" (Joubin, 1920).
- Funnel component an "auricular-like groove" (Joubin, 1920). This is a flask-shaped groove.
- Skin tubecules absent from mantle and elsewhere.
- Fins (Joubin, 1920)
- Fin length (without tail) 66% of ML.
- Fin width 79% if ML (without tail); assumming a 20 mm tail the FW becomes 71% of ML
- Fin width 120% of fin length (without tail).
- Photophores absent.
Source Joubin, 1920 Sex ? Mantle length 160 Mantle width 54 Head length 42 Head width 43 Fin length 105 (without tail) Fin width 127 Arm I, length 80 Arm II, length 105 Arm III, length 82 Arm IV, length 172 Arm I, sucker no. 135 Arm II, sucker no. 120+ Arm III, sucker no. 112 Arm IV, sucker no. 109 Tentacle length 480 Club length 390
This description is taken from Joubin (1920). This species is very similar to M. inermis but differs in the greater width of the fins and the fewer arm suckers. The differences between these species, however, requires confirmation. The flask-shaped groove in the funnel organ, the tiny club suckers and absence of photophores distinguishes M. magna and M. inermis from all other members of the genus.
Joubin, L. 1920. Céphalopodes provenant des Campagnes de la Princesse Alice (1898-1910). 3e Serie. Monaco.
National Marine Fisheries Service
National Museum of Natural History
Washington, D. C. 20560
Richard E. Young
Dept of Oceanography
University of Hawaii
Honolulu, Hawaii 96822
Page copyright © 2004 and Richard E. Young
- First online 18 July 2004
Citing this page:
Vecchione, Michael and Young, Richard E. 2004. Mastigoteuthis magna http://tolweb.org/Mastigoteuthis_magna/19520/2004.07.18 in The Tree of Life Web Project, http://tolweb.org/. Version 18 July 2004 (under construction).