Mouth development in the Senegal bichir<i>Polypterus senegalus</i>does not involve the oropharyngeal membrane: possible implications for the ecto-endoderm boundary and tooth initiation

Kralovič, Martin; Horáček, Ivan; Cerny, Robert

doi:10.1111/j.1439-0426.2010.01400.x

Cited by 4 publications

(10 citation statements)

References 17 publications

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“…Kerr (), Bartsch et al (), Diedhiou and Bartsch (), and Kralovic et al () previously staged the development of P. senegalus . Kerr () and Diedhiou and Bartsch () staged mainly before yolk exhaustion.…”

Section: Methodsmentioning

confidence: 99%

“…The present study contributes to our understanding of the morphology of the opercular muscles in the extinct primitive actinopterygians. Kerr (1907), Bartsch et al (1997), Diedhiou and Bartsch (2009), and Kralovic et al (2010) previously staged the development of P. senegalus. Kerr (1907) and Diedhiou and Bartsch (2009) staged mainly before yolk exhaustion.…”

Section: Introductionmentioning

confidence: 99%

“…Kerr (1907) and Diedhiou and Bartsch (2009) staged mainly before yolk exhaustion. In addition, Bartsch et al (1997) staged development from the embryo to the juvenile, but their staging table was not sufficiently detailed for our purposes, while Kralovic et al (2010) only staged mouth development. To describe the development of all the cranial muscles in P. senegalus, we defined a new staging table with 16 stages between the larval period (Table 1, Fig.…”

Section: Introductionmentioning

confidence: 99%

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Development of cranial muscles in the actinopterygian fish Senegal bichir,Polypterus senegalusCuvier, 1829

Noda

Miyake

Okabe

2017

Journal of Morphology

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Polypterus senegalus Cuvier, 1829 is one of the most basal living actinopterygian fish and a member of the Actinopterygii. We analyzed the spatial and temporal pattern of cranial muscle development of P. senegalus using whole-mount immunostaining and serial sectioning. We described the detailed structure of the external gill muscles which divided into dorsal and ventral parts after yolk exhaustion. The pattern of the division is similar to that of urodeles. We suggest that, the external gill muscles of P. senegalus are involved in spreading and folding of the external gill stem and the branches. The fibers of the external gill muscles appear postero-lateral to the auditory capsule. In addition, the facial nerve passes through the external gills. Therefore, the external gill muscles are probably derived from the m. constrictor hyoideus dorsalis. In contrast to previous studies, we described the mm. interhyoideus and hyohyoideus fibers as independent components in the yolk-sac larvae. The m. hyohyoideus fibers appear lateral to the edge of the ventral portion of the external gill muscles, which are probably derived from the m. constrictor hyoideus dorsalis. These findings suggest that the m. hyohyoidues is derived from the m. constrictor hyoideus dorsalis in P. senegalus. In other actinopterygians, the m. hyohyoideus is derived from the m. constrictor hyoideus ventralis; therefore, the homology of the m. hyohyoidues of P. senegalus and other actinopterygians remains unclear. J. Morphol. 278:450-463, 2017. © 2017 Wiley Periodicals, Inc.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Development of cranial muscles in the actinopterygian fish Senegal bichir,Polypterus senegalusCuvier, 1829

Noda

Miyake

Okabe

2017

Journal of Morphology

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“…It has been suggested that the rupture of the buccopharyngeal membrane initiates secondary mouth development (Soukup et al, ). In some anamniotes, the stomodeum has been implicated in tooth induction (bichir, Kralovic et al, ; salamanders, Lumsden, ; caecilians, Wake, ).…”

Section: Discussionmentioning

confidence: 99%

Insight from Frogs: Sonic Hedgehog Gene Expression and a Re‐evaluation of the Vertebrate Odontogenic Band

Grieco

Hlusko

2016

The Anatomical Record

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While the identification of conserved processes across multiple taxa leads to an understanding of fundamental developmental mechanisms, the ways in which different animals fail to conform to common developmental processes can elucidate how evolution modifies development to result in the vast array of morphologies seen today-the developmental mechanisms that lead to anatomical variation. Odontogenesis-how teeth are initiated and formed-is well suited to the examination of both developmental conservation and phenotypic diversity. We suggest here that the study of early tooth development, the period of odontogenic band development, reveals departures from conserved mechanisms that question the role of players in the developmental process. In the earliest stages of odontogenesis, Sonic hedgehog (Shh) gene expression is interpreted as critical evidence of tooth initiation prior to any histological indication. However, a detailed examination of studies of tooth development across a wide range of taxa reveals that several vertebrate species fail to conform to the expectations of the Shh Consensus Model, calling for a reconsideration of the assumed causality of epithelial Shh in tooth initiation. We present new Shh gene expression data for an amphibian, the frog Silurana (Xenopus) tropicalis. In these animals, craniofacial and odontogenic developmental processes are more disjunct, and thereby provide a natural test of the hypothesis that Shh is immediately required for subsequent tooth development. Our results suggest that Shh expression may actually be related to the formation of the mouth rather than a required precursor to subsequent tooth formation.

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“…An extant group of actinopterygians are the polypteriformes (polypterus or bichirs), and are considered by many to be the definitive representative of a actinopterygian “bauplan” (Bartsch, Gemballa, & Piotrowski, ; Kralovic, Horáček, & Cerny, ). Polypteriformes are bimodal respirators, using internal gills in water and paired dorsal spiracles to inhale air from the water surface (J.…”

Section: Evolution Of Jaws In Osteichthyesmentioning

confidence: 99%

Evolution and development of the fish jaw skeleton

DeLaurier

2018

WIREs Developmental Biology

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The evolution of the jaw represents a key innovation in driving the diversification of vertebrate body plans and behavior. The pharyngeal apparatus originated as gill bars separated by slits in chordate ancestors to vertebrates. Later, with the acquisition of neural crest, pharyngeal arches gave rise to branchial basket cartilages in jawless vertebrates (agnathans), and later bone and cartilage of the jaw, jaw support, and gills of jawed vertebrates (gnathostomes). Major events in the evolution of jaw structure from agnathans to gnathostomes include axial regionalization of pharyngeal elements and formation of a jaw joint. Hox genes specify the anterior–posterior identity of arches, and edn1, dlx, hand2, Jag1b‐Notch2 signaling, and Nr2f factors specify dorsal–ventral identity. The formation of a jaw joint, an important step in the transition from an un‐jointed pharynx in agnathans to a hinged jaw in gnathostomes involves interaction between nkx3.2, hand2, and barx1 factors. Major events in jaw patterning between fishes and reptiles include changes to elements of the second pharyngeal arch, including a loss of opercular and branchiostegal ray bones and transformation of the hyomandibula into the stapes. Further changes occurred between reptiles and mammals, including the transformation of the articular and quadrate elements of the jaw joint into the malleus and incus of the middle ear. Fossils of transitional jaw phenotypes can be analyzed from a developmental perspective, and there exists potential to use genetic manipulation techniques in extant taxa to test hypotheses about the evolution of jaw patterning in ancient vertebrates. This article is categorized under: Comparative Development and Evolution > Evolutionary Novelties Early Embryonic Development > Development to the Basic Body Plan Comparative Development and Evolution > Body Plan Evolution

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Mouth development in the Senegal bichirPolypterus senegalusdoes not involve the oropharyngeal membrane: possible implications for the ecto-endoderm boundary and tooth initiation

Cited by 4 publications

References 17 publications

Development of cranial muscles in the actinopterygian fish Senegal bichir,Polypterus senegalusCuvier, 1829

Development of cranial muscles in the actinopterygian fish Senegal bichir,Polypterus senegalusCuvier, 1829

Insight from Frogs: Sonic Hedgehog Gene Expression and a Re‐evaluation of the Vertebrate Odontogenic Band

Evolution and development of the fish jaw skeleton

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