See "Cephalopod beak guide for the southern ocean" by Xavier and Cherel. It provides various cephlopod beak shape in detail for species identification. Cheers!
Hi Joo, I've seen that book and I haven't found these species.Thanks.
Hi Francisco,
there is one good research paper by Kubodera et al.. (2007) on analysis of gut content for blue sharks. One finding is....
FROM THEIR PAPER!!
The most numerous cephalopod prey over the 2 years was the squid, Chiroteuthis calyx, which accounted for 7.0% of the total prey (TP) and 28.1% by frequency of occurrence (FO). Other cephalopod prey included the pelagic octopods,
Haliphron atlanticus (6.5% TP, 17.5% FO), Belonella borealis (6.3% TP, 12.3% FO), Japetella diaphana (4.0% TP, 19.3% FO), the squid, Gonatus pyros (3.0% TP, 10.5% FO), Gonatus onyx (2.6% TP, 8.8% FO), Octopoteuthis sp. (2.3% TP, 10.5% FO), Histioteuthis dofleini (2.1% TP, 14.0% FO), H. inermis (1.9% TP, 7.0% FO), Ancistrocheirus lesueuri (1.6% TP, 8.8% FO), Gonatus berryi (1.6% TP, 5.3% FO)
and Gonatus sp. (1.6% TP, 8.8% FO). Each of the remaining 12 cephalopod species accounted for less than 1.5% of the total prey and less than 6% by frequency of occurrence.
I am attaching the full paper in case..
best regards
Deepak
Many thanks Deepak,
Those species are similar to what I have found on my research, but I still can´t identify this Octopodiformes species (those on top)..
I completely concur with Unai on this one. We know very little about the octopods in this region. However, it may be a bit of an overreach even to assign these to a generic level. I recommend assigning these to unidentified octopodid.
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