Opisthoteuthis plutoRichard E. Young and Michael Vecchione
The largest specimen of Opisthoteuthis pluto described by Berry (1918) was the holotype which reached 540 mm in arm span (arm tip to arm tip).
- Arms subequal.
- Female: 5-7 suckers largest; suckers 1-3 very small.
- "Both suckers and cirri apparently more or less completely retractile..."
- Suckers number 80-85 on each arm ("large specimen").
- Male: greatly enlarged suckers in proximal and distal fields; proximal fields apparently equal on all arms; greatly enlarged suckers in distal field present on arms II - IV only (O'Shea, 1999).
The above description is from Berry (1918) except where otherwise noted. More details of the description of O. pluto can be found here.
O. pluto differs from O. persephone in their pigmentation according to Berry. O. persephone almost invariably has 6 primary gill lamellae (O'Shea, 1999), O. pluto has 8. O. pluto differs from all members of the genus (where males are known), except O. massyae, in having enlarged suckers in the distal field only on arms II-III. It presumably differs from O. massyae in not having especially broad arms I in mature males although this has not been demonstrated.
Type locality: 129°28'E, along the Great Australian Bight. Also known from off the coasts of Southwestern Australia (O'Shea, 1999). Vertical distribution is from 275 - 830 m.
Berry, S.S. 1918. Report on the Cephalopoda Obtained by the F.I.S. "Endeavour" in the Great Australian Bight and Other Southern Australian Localities. Biological Results of the Fishing Experiments carried on by the F.I.S. "Endeavour", 1909-1914, 4(5):201-298.
O'Shea, Steve. 1999. The Marine Fauna of New Zealand: Octopoda (Mollusca: Cephalopoda). NIWA Biodiversity Memoir 112: 280pp.
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- First online 13 May 2003
Citing this page:
Young, Richard E. and Michael Vecchione. 2003. Opisthoteuthis pluto http://tolweb.org/Opisthoteuthis_pluto/20166/2003.05.13 in The Tree of Life Web Project, http://tolweb.org/. Version 13 May 2003 (under construction).