Munida iris A. Milne-Edwards, 1880

Vazquez-Bader, Ana Rosa & Gracia, Adolfo, 2016, Diversity and distribution of Chirostyloidea and Galatheoidea (Decapoda, Anomura) in the Southern Gulf of Mexico, ZooKeys 612, pp. 1-30 : 10-11

Taxon classification Animalia Decapoda Munididae

Munida iris A. Milne-Edwards, 1880

Material examined.

BATO stn. 29, 2 males; stn. 33, 1 ovigerous female; stn. 41, 3 males, 2 females; stn. 49, 1 male; stn. 50, 2 males, 1 female; stn. 54, 1 male, 2 ovigerous females; stn. 59, 1 male, 1 ovigerous female. BIOREPES 1 stn, 12, 2 males, 2 ovigerous females; stn. 27, 33 males, 26 females, 42 ovigerous females; stn.30, 2 males, 1 female; stn 34, 37 males, 1 female, 1 ovigerous female. BIOREPES 2 stn. 2, 1 female; stn 10, 1 ovigerous female. BIOREPES 3 stn. A1, 1 female; stn. A2, 1 ovigerous female; stn. A24, 1 male; stn. B2, 1 male; stn. B6, 1 male; stn. C5, 2 males, 2 females, 1 ovigerous female. COBERPES stn. B9, 2 males; stn. Ω 2, 1 male, 1 female. COBERPES 3 stn. B2, 3 males; stn. B9, 3 males; stn. B10, 2 males, stn B 15B, 1 ovigerous female. COBERPES 2011 stn. B9, 3 males, 1 ovigerous female, stn. E1, 1 male; stn E4, 2 males, 2 ovigerous females; stn. E7, 8 males, 1 ovigerous female. COBERPES 4 stn. B15B, 1 male, 1 ovigerous female; stn C34B, 1 male.

Additional material examined.

SIGSBEE 9 stn. A9, 1 male. MOPEED 2 stn. W1, 1 female.

Remarks.

This species was the second in abundance with 215 individuals collected off San Fernando River, Tamaulipas; Tuxpan, Veracruz; Campeche Bank, Campeche; off Alacranes and Arenas Reef, Yucatán; sectors: WNW, WSW, SSW, ESE, SSE; 244.6-1040.0 m. The overall sex ratio was 1.26 M: 1 F. The greatest abundance was found in summer (69.8%; 244.6-913.0 m) mainly in the ESE sector (54.9%; 249.9-452.0 m). The ovigerous CL mean was larger (x = 23.7 ± 2.74, min. 12.6, max. 26.3 mm) than females (x = 22.9 ± 3.304 min. 11.6, max. 27.7 mm) and males (x = 20.2 ± 6.041 min. 8.3, max. 30.9 mm). The ANOVA analysis of CL showed significant differences through depth strata in all sexes: males F (3; 97) = 162.55, p = 0.00, females F (2; 33) = 12.60, and ovigerous females F depth (3, 48) = 21.80, p = 0.00. Male and ovigerous female small sizes were found at shallow depth interval, whereas females were at deeper depth (Figs 6a, c, d). Only males presented significant size difference among seasons F (2;98) = 13.59; p = 0.00. Highest sizes were reported in autumn, whereas small ones were in summer (Fig. 6b). The differences of sex ratio in spring (1.07 M: 1 F) and summer (2.3 M: 1 F) were not statistically different compared to autumn (3.25 M: 1 F; χ 2 = 4.765, with 1 degree of freedom, two-tailed P = 0.0290). Ovigerous females were collected in spring, summer, and autumn; the greatest percentage (20.9%) was reported in summer in a 245-412 m depth range. Two males were infested with rhizocephalans (CL 21.3 –24– 9 mm), also one male (CL = 23.8 mm) and one female (CL = 30.3 mm) were infested with bopyrid.