Munidopsis riveroi Chace, 1939

Munidopsis riveroi has been reported from the Gulf of Mexico to Colombia in depths of 260 to 683 m (Chace 1942; Campos et al. 2005). Specimens used in this analysis were from the Caribbean in depths of 335 to 3822 m. Specimens were collected in March, May, July, October, and December; ovigerous specimens were collected from all of these months (Fig. 13 E). Twenty five males, four non-ovigerous females, and 32 ovigerous females were measured. Male CW ranged from 5.2 to 11.3 mm. Non-ovigerous female CW ranged from 8.0 to 12.0 mm. Ovigerous female CW ranged from 8.9 to 14.8 mm. Males were significantly smaller than females (t-test, df = 56, t = -5.701, p<0.001); but ovigerous and non-ovigerous females were not significantly different in size (t-test, df = 31, t = 1.747, p = 0.091). Females had between 21 and 176 eggs and the average egg diameter for each female ranged from 0.98 to 1.34 mm. Fecundity was correlated with CW for M. riveroi (R2 = 0.191, p = 0.042) (Fig. 10 E) as was average egg size (R2 = 0.07, p<0.001), but size was not a good predictor for either variable.