Note

Opisthoteuthis massyae Measurements and Counts

Roger Villanueva, Richard E. Young, and Michael Vecchione
Miminum - Mean - Maximum
Sex Male (11 animals) mature Male (5) maturing Female (3) mature Female (6) maturing+immat.
Mantle length, mm 36 - 60 - 75 40 - 49 - 56 61 - 66 - 76 32 - 42 - 50
Total length, mm 210- 288 - 350 175 - 213 - 292 275 - 280 - 285 166 - 202 - 250
Mantle width, % of ML 60 - 102 - 175 68 - 81 - 100 77 - 94 - 105 87 - 106 - 125
Head width, % of ML 116 - 141 - 178 112 - 134 - 165 101 - 118 - 137 110 - 149 - 194
Max. cirrus length, % of head width 4.5 - 7.0 - 9.2 5.8 - 7.8 - 11.0 5.2 - 6.4 - 8.4 5.2 - 6.8 - 10.0
Fin length, % of head width 33 - 54 - 75 47 - 60 - 74 31 - 36 - 40 33 - 46 - 67
Fin width, % of fin length 39 - 52 - 71 33 - 42 - 50 43 - 47 - 50 48 - 56 - 70
Fin span, % of total length 38 - 49 - 66 33 - 47 - 53 33 - 37 - 40 36 - 44 - 48
Eye diameter, % of ML 31 - 60 - 92 38 - 53 - 70 29 - 35 - 43 36 - 58 - 81
Terminal organ (penis) length, % of ML 6.2 - 11.4 - 19.4 7    
Gill lamellae, number 6 - 6.9 - 8 6 - 6.6 - 7 7 6 - 7.0 - 8
Arm I, length, % of ML 264 - 395 - 517 320 - 355 - 395 331 - 357 - 377 348 - 406 - 453
Arm II, length, % of ML 264 - 383 - 489 320 - 348 - 400 339 - 355 - 385 314 - 386 - 438
Arm III, length, % of ML 309 - 390 - 511 310 - 349 - 402 336 - 345 - 361 310 - 389 - 438
Arm IV, length, % of ML 300 - 387 - 475 300 - 342 - 421 361 370 - 385 - 422
Arm I, width, % of ML 33- 55 - 73 33 - 37 - 40 29 - 29 - 30  
Arm II, width, % of ML 26- 43 - 59 29 - 37 - 44 26 - 32 - 38  
Arm III, width, % of ML 24 - 37 - 52 21 - 23 - 25 20 - 22 - 24  
Arm IV, width, % of ML 24 - 35 - 53 30 - 38 - 46 44 - 45 - 46  
Max. sucker diam, Arm I, prox., % of ML 7.4 - 10.3 - 15.0 7.1 - 8.9 - 12.1 5.1 - 5.8 - 7.2 5.4 - 6.3 - 7.2
Max. sucker diam, Arm II, prox., % of ML 7.8 - 10.0 - 15.0 6.9 - 8.6 - 12.1 4.9 - 5.4 - 5.7 5.4 - 6.2 - 7.2
Max. sucker diam, Arm III, prox., % of ML 7.5 - 10.3 - 15.3 8.0 - 9.4 - 13.8 4.8 - 5.8 - 7.5 5.5 - 6.2 - 7.8
Max. sucker diam, Arm IV, prox., % of ML 8.4 - 10.2 - 15.4 7.5 - 9.4 - 13.8 5.1 - 5.3 - 5.5 5.4 - 6.5 - 7.5
Max. sucker diam, Arm I, dist., % of ML 3.3 - 4.4 - 5.6 3.2    
Max. sucker diam, Arm II, dist., % of ML 3.6- 5.8 - 8.3 3.4 - 5.1 - 7.0    
Max. sucker diam, Arm III, dist., % of ML 5.2- 7.9 - 9.7 3.3 - 6.0 - 9.1    
Max. sucker diam, Arm IV, dist., % of ML 5.5 - 8.3 - 10.4 5.0 - 7.7 - 12.1    
Sucker count, arm I 78 - 86.1 - 96 80 - 88.5 - 97 82 - 84.3 - 88 76 - 84 - 94
Sucker count, arm II 82 - 90.8 - 101 94 - 97.0 - 100 84 - 85.7 - 87 80 - 85.8 - 92
Sucker count, arm III 80 - 92.2 - 108 95 - 101.0 - 107 85 - 86.5 - 89 77 - 82.6 - 88
Sucker count, arm IV 82 - 89.6 - 105 82 - 95.7 - 107 - 78 - 83.0 - 90

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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