Note

Opsithoteuthis grimaldii: Measurements and Counts

Roger Villanueva, Richard E. Young, and Michael Vecchione
Minimum - Mean - Maximum
Sex Male (8 animals) Mature
Mantle length, mm 31 - 41 - 50
Total length, mm 126 - 200 - 250
Mantle width, % of ML 71 - 119 - 160
Head width, % of ML 132 - 164 - 211
Max. cirrus length, % of head width 4.9 - 7.8 - 10.4
Fin length, % of head width 20 - 40 - 49
Fin width, % of fin length 29 - 45 - 61
Fin span, % of total length 33 - 51 - 70
Eye diameter, % of ML 62 - 77 - 95
Terminal organ (penis) length, % of ML 8.2 - 12.7 - 17.0
Gill lamellae, number 7 - 7.6 - 8
Arm I, length, % of ML 311 - 380 - 452
Arm II, length, % of ML 230 - 379 - 441
Arm III, length, % of ML 220 - 372 - 461
Arm IV, length, % of ML 210 - 366 - 436
Arm I, width, % of ML 28 - 38 - 51
Arm II, width, % of ML 24 - 35 - 45
Arm III, width, % of ML 22 - 31 - 42
Arm IV, width, % of ML 20 - 31 - 42
Max. sucker diam, Arm I, prox., % of ML 6.0 - 12.4 - 17.0
Max. sucker diam, Arm II, prox., % of ML 6.2 - 12.1 - 16.7
Max. sucker diam, Arm III, prox., % of ML 6.0 - 11.3 - 15.2
Max. sucker diam, Arm IV, prox., % of ML 6.0 - 11.5 - 17.0
Max. sucker diam, Arm I, dist., % of ML 5.5 - 9.4 - 13.9
Max. sucker diam, Arm II, dist., % of ML 5.2 - 9.2 - 12.9
Max. sucker diam, Arm III, dist., % of ML 5.8 - 9.6 - 14.2
Max. sucker diam, Arm IV, dist., % of ML 6.0 - 10.1 - 14.2
Sucker count, arm I 74 - 77.2 - 82
Sucker count, arm II 70 - 75.0 - 80
Sucker count, arm III 73 - 78.0 - 83
Sucker count, arm IV 68 - 75.5 - 81

Comments

These measurements and counts are from Villanueva, et al., 2002. Many of the figures have been rounded to the nearest whole number.

References

Villanueva, R., Collins, M., Sanchez, P. and N. Voss. 2002. Systematics, distribution and biology of the cirrate octopods of the genus Opisthoteuthis (Mollusca, Cephalopoda) in the Atlantic Ocean, with description of two new species. Bulletin of Marine Science 71(2):933-985.

About This Page


Instituto de Ciencias del Mar (CSIC), Barcelona, Spain


University of Hawaii, Honolulu, HI, USA


National Museum of Natural History, Washington, D. C. , USA

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