. Fig. 131. Maera pfefferi, a. Side-plate 1 and gnathopod 1. b. Gnathopod 2 $. c. 2nd joint of peraeopod 5. d. Left uropod 3 rj, dorsal view. Gnathopod 1, 5th joint subequal to 2nd, its upper apex produced as a short point overhanging base of 6th, in the juvenile as well as the adult, 6th shorter than 5th, ovate- triangular, palm somewhat oblique, with rounded defining angle and no spine, palmar margin spinulose, lower margins of 5th and 6th joints densely setose, and outer surfaces with several fascicles of setae arranged in rows. No sexual differences. Gnathopod 2, 6th joint broadly ov
. Fig. 131. Maera pfefferi, a. Side-plate 1 and gnathopod 1. b. Gnathopod 2 $. c. 2nd joint of peraeopod 5. d. Left uropod 3 rj, dorsal view. Gnathopod 1, 5th joint subequal to 2nd, its upper apex produced as a short point overhanging base of 6th, in the juvenile as well as the adult, 6th shorter than 5th, ovate- triangular, palm somewhat oblique, with rounded defining angle and no spine, palmar margin spinulose, lower margins of 5th and 6th joints densely setose, and outer surfaces with several fascicles of setae arranged in rows. No sexual differences. Gnathopod 2, 6th joint broadly ovate, hind margin with fascicles of short setae, rather longer than palm which is slightly oblique, defined by a strong, apically bifid tooth, two teeth near hinge, with a semicircular notch between them, margin between lower tooth and defining angle crenulate, a spinule in each notch. No sexual differences, except that in the $ the tooth nearest the hinge is broader and stronger. In the no. 1 ^ the right hand is slightly larger than the left. In no. 1 juv. the palm is entire or only faintly crenulate.
Size: 2617px × 1910px
Photo credit: © The Bookworm Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, booksubjectocean, booksubjectscientificexpediti
