Measurements and Counts

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.