. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. NUDIBRANCH NEUROGENESIS II 379 Having rejected Tardy's (1970, 1974) interpretation for the origin of pleural ganglia in nudibranchs, my colleagues and I identified the ganglia directly behind the cerebrals as the pleural ganglia in previous studies on the dorid Doridella steinbergae (Bickell and Chia, 1979) and on Melibe leonina (Bickell and Kempf, 1983). Kempf et al. (1987) gave the same interpretation for the larval CNS of the dendronotid Tritonia diomedea, except they also resolved a visceral ganglion (Fig.
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. NUDIBRANCH NEUROGENESIS II 379 Having rejected Tardy's (1970, 1974) interpretation for the origin of pleural ganglia in nudibranchs, my colleagues and I identified the ganglia directly behind the cerebrals as the pleural ganglia in previous studies on the dorid Doridella steinbergae (Bickell and Chia, 1979) and on Melibe leonina (Bickell and Kempf, 1983). Kempf et al. (1987) gave the same interpretation for the larval CNS of the dendronotid Tritonia diomedea, except they also resolved a visceral ganglion (Fig. 26C). This model is superficially attrac- tive because it produces an adult CNS with ganglionic regions that conform to the traditional interpretation based on comparative neuroanatomical studies of adult opisthobranchs (Fig. 27A). However, this model fails to explain why the left 'pleural ganglion' in the larva projects ventrally relative to the right, when pleural ganglia should not be involved in torsional displace- ments. 1 now believe that these ganglia are the intes- tinals. Figure 26D shows my current interpretation of gangli- onic regions within the late larval nervous system of Me- libe leonina. The subsequent pattern of ganglionic fusions produces a CNS with ganglionic regions that differ from the traditional interpretation. The differences are illus- trated in Figure -PLG OTG. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Laboratory
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
