Monophyletic origin of the dorsally arched lateral line in teleostei: Evidence from nerve innervation patterns
2010
Yamanaka, Y., Kochi Univ. (Japan). Faculty of Science | Nakae, M. | Fukuda, E. | Sasaki, K.
Branching patterns of the horizontal septum lateral line nerves (HSN) were studied in 123 teleostean species (including literature records) assigned to 96 families in 28 orders, primarily to indentify the group characterized by the presence of the dorsal longitudinal collector nerve (DLCN) for innervation of the trunk lateral line. In nonacanthomorphs, DLCN was absent, the trunk lateral line being mostly innervated by branches directly detached from HSN or those derived from the collector nerve running parallel to the former. In acanthomorphs, the dorsally arched trunk lateral line, typical of the group, was uniformly innervated by DLCN, indicating that presence of the latter was a synapomorphy of the group. Within the latter, DLCN was absent in Gasterosteiformes (Fistularia and Macroramphosus), Mugilidae, Atherinomorpha, Champsodontidae, Blenniidae, Callionymidae, Gobioidei, Istiophoridae, Gempylidae, Cynoglossidae, Ostraciidae, and Molidae. Monophyly of the Mugilidae plus Atherinomorpha was discussed based on the specialized innervation pattern.
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