Note

Opsithoteuthis calypso Measurements and Counts

Richard E. Young, Michael Vecchione, and Roger Villanueva
Sex Male Holotype Male Paratype Male Paratype Male Paratype Female Paratype Female Paratype Female Paratype Female Paratype
Mantle length, mm 38 27 29 35 26 29 35 39
Total length, mm 202 176 148 130 105 115 105 137
Mantle width, % of ML 113 139 155 69 142 148 80 -
Head width, % of ML 162 186 177 134 173 152 106 126
Max. cirrus length, % of head width 6 11 8 7 5 7 7 7
Fin length, % of head width 41 60 66 53 31 39 60 53
Fin width, % of fin length 52 38 30 40 57 35 55 54
Fin span, % of total length 47 48 58 62 59 57 65 60
Eye diameter, % of ML 76 106 98 77 77 66 51 59
Terminal organ (penis) length, % of ML 9.2 14.6 6.6 11.4        
Gill lamellae, number 7 7 7 7 7 7 7 7
Arm I, length, % of ML 384 471 421 300 304 - 214 233
Arm II, length, % of ML 321 478 435 300 300 303 229 249
Arm III, length, % of ML 334 460 441 300 327 310 243 251
Arm IV, length, % of ML 382 427 435 314 292 293 214 251
Arm I, width, % of ML 33 55 39 51        
Arm II, width, % of ML 32 55 28 44        
Arm III, width, % of ML 32 60 32 44        
Arm IV, width, % of ML 29 49 34 40        
Max. sucker diam, Arm I, prox., % of ML 12.9 15.0 15.2 11.1 6.5 7.6 5.4 6.2
Max. sucker diam, Arm II, prox., % of ML 11.8 15.0 12.1 10.3 6.9 7.6 5.4 6.2
Max. sucker diam, Arm III, prox., % of ML 18.2 25.5 20.7 14 6.5 7.2 5.4 6.2
Max. sucker diam, Arm IV, prox., % of ML 13.7 15.7 14.8 8.6 6.5 6.9 5.4 6.2
Max. sucker diam, Arm I, dist., % of ML 19.2 21.9 21.7 16.9        
Max. sucker diam, Arm II, dist., % of ML 19.7 23.4 20.7 16.6        
Max. sucker diam, Arm III, dist., % of ML 22.1 25.5 20.7 18.9        
Max. sucker diam, Arm IV, dist., % of ML 22.4 25.5 20.7 19.4        
Arm sucker count 54 55 54 50 51 51 40 50

Comments

These measurements and counts are from villanueva, et al., 2002.

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


University of Hawaii, Honolulu, HI, USA


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


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

All Rights Reserved.

close box

This page is a note that is attached to a leaf of the Tree of Life.

ToL notes provide brief accounts of characteristics, short summaries, commentaries, media files, taxonomic information, or identification tools for a given group of organisms.

For a more detailed explanation of the different ToL page types, have a look at the Structure of the Tree of Life page.

close box

Opisthoteuthis calypso

Page Content

articles & notes

collections

people

Explore Other Groups

random page

  go to the Tree of Life home page
top