Abstract
Branching patterns of the trunk lateral line nerves were studied in 46 pleuronectiform species, representing nine families in two suborders. The dorsal fin longitudinal ramus (DFLR), derived from the main nerve (horizontal septum lateral line nerve), passed closely along the course of the middle trunk lateral line in all specimens examined, the dorsal longitudinal collector nerve (DLCN) partly coalescing with the DFLR along the arched part of the lateral line in Psettodes erumei (Psettodoidei), compared with the entire length of the latter in all other species (Pleuronectoidei). Citharidae, Paralichthyidae, and Pleuronectidae were characterized by having a simple, elongated dorsal ramule; Bothidae was unique in having more than one dorsal ramule, forming a ladder-like network and peripherally giving off numerous minute branches; Poecilopsettidae and Samaridae possessed a few, short dorsal ramules; Soleidae and Cynoglossidae were characteristic in having a dendritic dorsal ramule. Secondary modifications of the course of the middle trunk lateral line were detected by nerve information, the arched part of the lateral line having been secondarily highly elevated in some genera of Pleuronectidae, but secondarily straightened in Samaridae.
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Acknowledgments
H. Motomura (Kagoshima University Museum) and the staff of Borneo Marine Research Institute, Universiti Malaysia Sabah, were extremely helpful during the first author’s Psettodes research trip. H. Imamura (Hokkaido University) donated a number of Hokkaido pleuronectid specimens. G. Hardy (Ngunguru, New Zealand) read the manuscript and offered helpful comments.
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Fukuda, E., Nakae, M., Asaoka, R. et al. Branching patterns of trunk lateral line nerves in Pleuronectiformes: uniformity and diversity. Ichthyol Res 57, 148–160 (2010). https://doi.org/10.1007/s10228-009-0141-y
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DOI: https://doi.org/10.1007/s10228-009-0141-y