FIGURE 5. Scalibregma australis n in New species of Scalibregmatidae (Annelida, Polychaeta) from the East Antarctic Peninsula including a description of the ecology and post-larval development of species of Scalibregma and Oligobregma

FIGURE 5. Scalibregma australis n. sp. Photomicrographs of post-larvae and juveniles: A‒F, developmental series of the prostomium (A, 16 setigers; B, 17 setigers; C, 20 setigers; D, 22 setigers, E, 28 setigers; F, 30 setigers); G‒I, developmental series of the pygidial cirri (G, 20 setigers; H, 18 setigers; I, 28 setigers with pigmented glands in dorsal cirri); J‒L, changes in body shape, narrowing of posterior end (J, 18 setigers; K, 20 setigers; L, 22 setigers with pigmented glands in dorsal cirri); M, anterior, 28-setiger specimen; N, 30-setiger juvenile, ventral view showing development of the upper and lower lips of the mouth, branchiae, gland on setiger 4, and ventral ridge line. Abbreviations: br, branchiae; gL, gland, lL, lower lip of mouth; pr, prostomium; uL, upper lip of mouth.