The Phylogenetic Distribution and Innervation of Craniate Mechanoreceptive Lateral Lines

Northcutt, R. Glenn

doi:10.1007/978-1-4612-3560-6_3

Cited by 172 publications

(150 citation statements)

References 82 publications

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“…The phylogenetic appearance of the lateral line system coincides with the divergence of the vertebrate lineage from non-vertebrate chordates (Northcutt 1989), and therefore with at least part of the expansion of the Hox gene complex (Holland and Garcia-Fernandez 1996;Pendleton et al 1993;Schubert et al 1993). It should be noted however that the involvement of other Hox paralogs and the possibility of Hox paralogs having been lost in the ambystomid (or urodele) lineage cannot be ruled out with data available for so few genes (see Maconochie et al 1996, for a review of paralogous Hox genes).…”

Section: Discussionmentioning

confidence: 97%

“…The phylogenetic distribution of conserved sequences within and outside of the homeobox suggests that these genes may have functions important in animal development generally, and the similarities of expression patterns in various vertebrates may be indicative of some developmental roles retained in the different lineages from their common chordate ancestor (Holland et al 1994;Sharman and Holland 1996). Thus these same genes might also be expected to be associated with the development of a sensory system primitive for the vertebrates, such as lateral lines (Northcutt 1989).…”

Section: Introductionmentioning

confidence: 99%

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Homeobox genes in axolotl lateral line placodes and neuromasts

Metscher

Northcutt

Gardiner

et al. 1997

Development Genes and Evolution

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Gene expression has been studied in considerable detail in the developing vertebrate brain, neural crest, and some placode-derived organs. As a further investigation of vertebrate head morphogenesis, expression patterns of several homeobox-containing genes were examined using whole-mount in situ hybridization in a sensory system primitive for the vertebrate subphylum: the axolotl lateral lines and the placodes from which they develop. Axolotl Msx-2 and Dlx-3 are expressed in all of the lateral line placodes. Both genes are expressed throughout development of the lateral line system and their expression continues in the fully developed neuromasts. Expression within support cells is highly polarized. In contrast to most other observations of Msx genes in vertebrate organogenesis, expression of Msx-2 in developing lateral line organs is exclusively epithelial and is not associated with epithelial-mesenchymal interactions. A Hox-complex gene, Hoxb-3, is shown to be expressed in the embryonic hindbrain and in a lateral line placode at the same rostrocaudal level, but not in other placodes nor in mature lateral line organs. A Hox gene of a separate paralog group, Hoxa-4, is expressed in a more posterior hindbrain domain in the embryo, but is not expressed in the lateral line placode at that rostrocaudal level. These data provide the first test of the hypothesis that the neurogenic placodes develop in two rostrocaudal series aligned with the rhombomeric segments and patterned by combinations of Hox genes in parallel with the central nervous system.

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Section: Discussionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Homeobox genes in axolotl lateral line placodes and neuromasts

Metscher

Northcutt

Gardiner

et al. 1997

Development Genes and Evolution

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“…This level of observation does not reveal which cranial nerve components (trigeminal, facial and lateral-line) are contained in each of these trunks. However, an examination of the Bodian head series shows that there are three cephalic lateral-line canals: a supraorbital canal, an infraorbital canal, and a preoperculomandibular canal, as also seen in other teleosts (Northcutt 1989;Puzdrowski 1989;Webb 1989). Mechanoreceptors located in these three canals are innervated by lateral-line fibers running in the supraorbital, maxillary, and hyomandibular nerve trunks which correspond to 287 the superficial ophthalmic and buccal rami of the anterodorsal lateral-line nerve, and to the external mandibular ramus of the anteroventral lateral-line nerve, respectively (Northcutt 1989;Puzdrowski 1989).…”

Section: General Anatomymentioning

confidence: 89%

The valvula cerebelli of the spiny eel, Macrognathus aculeatus, receives primary lateral-line afferents from the rostrum of the upper jaw

1991

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Summary. In the spiny eel, Macrognathus aculeatus, anterodorsal and (to a lesser degree) anteroventral lateralline nerves project massively to the granular layer of the valvula cerebelli, throughout its rostrocaudal extent. The posterior lateral-line nerve terminates in the corpus cerebelli. Thus, valvula and corpus cerebelli are supplied with mechanosensory input of different peripheral origins. An analysis of the taxonomic distribution of experimentally determined primary lateral-line input to the three parts of the teleostean cerebellum reveals that the eminentia granularis always receives such input, and that the corpus cerebelli is the recipient of primary lateral-line input in many teleosts. The valvula, however, receives primary lateral-line afferents in only two examined species. In M. aculeatus, the massive lateral-line input to the valvula probably originates in mechanoreceptors located in the elongated rostrum of the upper jaw, a characteristic feature of mastacembeloid fishes. This projection to the valvula may therefore represent a unique specialization that arose with the evolution of the peculiar rostrum.Key words: Cerebellum -Valvula -Lateral-line system -Mechanoreception -Macrognathus aculeatus (Teleostei)The rostral portion of the cerebellum in ray-finned fishes (actinopterygians) is termed the valvula cerebelli. It extends into the mesencephalic ventricle. Since the valvula is exclusively present in actinopterygians (Larsell 1967;Nieuwenhuys 1967), it can be considered a shared derived character (synapomorphy) of these fishes, as suggested by Herrick (1924) at the beginning of this century. Recently, Wullimannand Northcutt (1988 In some of the classical descriptive literature (Addison 1923;Herrick 1924;Pearson 1936b), the development of the valvula has been correlated with that of the lateral-line nerves. In particular, primary lateral-line input has been shown, using histological material, to reach the valvula in several teleost species. As in the case of the primary projections of the octaval nerve to the vestibulo-lateral lobe of the cerebellum in all gnathostome vertebrates, the lateral-line input to the valvula has been interpreted as ancestral for teleosts (Addison 1923;Pearson 1936b).However, modern tracer studies (degeneration and horseradish peroxidase labeling) of primary lateral-line projections, involving more than a dozen teleost species (see Table 1), indicate that (except for the black molly, Mollienesia; Claas and Mfinz 1981) such projections to the valvula are absent. In the present horseradish peroxidase study, we have examined the primary lateral-line projections to the valvula cerebelli in the spiny eel Macrognathus aculeatus, and we have reviewed all studies of experimentally determined primary lateral-line projections to the three different parts of the teleostean cerebellum. For the sake of completeness, a short report is also given on the trigeminal and facial components and the lateral-line projections to the medial octavolateralis nucleus, which were revealed by the ...

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“…Terminology for skeleton and cephalic laterosensory canals follow Bockmann & Miquelarena (2008) and Northcutt (1989), respectively. Pelvic girdle is named according to Shleden (1937).…”

Section: Methodsmentioning

confidence: 99%

The blind catfish from the caves of Chapada Diamantina, Bahia, Brazil (Siluriformes: Heptapteridae): description, anatomy, phylogenetic relationships, natural history, and biogeography

Bockmann

Castro

2010

Neotrop. ichthyol.

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Rhamdiopsis krugi, a new troglobitic heptapterid catfish, is described from the caves of Chapada Diamantina, State of Bahia, northeastern Brazil. This species, although frequently cited in the scientific literature along the last seventeen years, remained undescribed largely due to its uncertain phylogenetic affinities. The generic assignment of R. krugi was clouded largely by its high number of unusual morphological features (some related to cave life), for instance: absence of eyes and body pigmentation; presence of a widely exposed pseudotympanum; posterior border of the anterior branch and anterior margin of the arborescent portion of the posterior branch of the transverse process of fourth vertebra joined; dorsal hypural plate commonly with seven rays; ventral caudal plate usually with six rays; dorsal and ventral caudal-fin lobes typically with six branched fin rays each; 38-39 vertebrae; anal fin with 14-17 rays; and lateral line very short. Rhamdiopsis krugi can be easily distinguished from its congeners, R. microcephala and R. moreirai, by its troglomorphic features and by the presence of a shorter lateral line, fewer vertebrae and anal-fin rays, pattern of branching of caudal-fin rays, and several attributes of skeletal system. The affinities of this new species are discussed in light of current phylogenetic knowledge of the family Heptapteridae. Incongruent derived characters do not allow selection of a particular hypothesis of sister group relationships among species of Rhamdiopsis. The occurrence of R. krugi in the rio Paraguaçu basin is possibly due to an event of hydrological capture from a section of the middle portion of the rio São Francisco basin, caused by tectonic events. The semi-arid region where R. krugi presently lives was probably covered by a wide forested area during a humid cycle in Quaternary. A summary of natural history and ecology data of R. krugi, as well as notes on its conservation, are provided. We also offer comments on the morphological plasticity of R. krugi.Rhamdiopsis krugi, um novo bagre heptapterídeo troglóbio, é descrito de cavernas da Chapada Diamantina, Estado da Bahia, nordeste do Brasil. Esta espécie, embora frequentemente citada na literatura ao longo dos últimos dezessete anos, não foi descrita antes em função das suas afinidades filogenéticas incertas. A posição genérica de R. krugi foi obscurecida principalmente pelo seu alto número de caracteres morfológicos incomuns (parte deles relacionada à vida nas cavernas), como por exemplo: ausência de olhos e de pigmentação corporal; presença de um pseudotímpano amplamente exposto; borda posterior do ramo anterior e margem anterior da porção arborescente do ramo posterior do processo transverso da quarta vértebra conectados um ao outro; placa hipural dorsal normalmente com sete raios; placa caudal ventral usualmente com seis raios; lobos dorsal e ventral da nadadeira caudal tipicamente com seis raios ramificados cada; 38-39 vértebras; nadadeira anal com 14-17 raios; e linha lateral muito curta. Rhamdiopsis krugi pode ...

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The Phylogenetic Distribution and Innervation of Craniate Mechanoreceptive Lateral Lines

Cited by 172 publications

References 82 publications

Homeobox genes in axolotl lateral line placodes and neuromasts

Homeobox genes in axolotl lateral line placodes and neuromasts

The valvula cerebelli of the spiny eel, Macrognathus aculeatus, receives primary lateral-line afferents from the rostrum of the upper jaw

The blind catfish from the caves of Chapada Diamantina, Bahia, Brazil (Siluriformes: Heptapteridae): description, anatomy, phylogenetic relationships, natural history, and biogeography

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