Développement du chondrocrâne et des arcs aortiques chez<i>Polypterus senegalus</i>Cuvier

Daget, J.; Bauchot, Marie-Louise; Bauchot, Roland; Arnoult, J.

doi:10.1111/j.1463-6395.1964.tb00720.x

Cited by 16 publications

(8 citation statements)

References 4 publications

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“…They therefore wrongly suspected that fertilization took place internally, based on the fact that the males possess erectile anal fins and on a doubtful observation of decaying "intrauterine" cleavage stages. This view was corrected by Arnoult (1964) and Armbrust ( 1966), and external fertilization is confirmed in the aquaristic literature (Hartl 1981) and by our personal observation (see also Bartsch & Britz 1996). However, a complete and comprehensive survey of the ontogeny as a basis for comparison and phylogenetic discussion has not been produced yet.…”

Section: Introductionsupporting

confidence: 64%

“…§The systematic term "Osteognathostomata" is employed here, because in contrast to the more widepread synonym "Osteichthyes" (sensu Rosen et al 1981, for example) it favourably accentuates the monophyly of bony fishes and Tetrapoda. "Osteognathostomata" was also used in Bartsch 1947; Daget et al 1964;DeSmet 1965DeSmet , 1966Bjerring 1986Bjerring , 1988, for example). The developmental series of P. senegalus collected by J. S. Budgett in Gambia shortly after the turn of the century is still the basis for the most complete account of the general ontogeny of Polypterus.…”

Section: Introductionmentioning

confidence: 99%

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The Embryonic and Larval Development of Polypterus senegalusCuvier, 1829: its Staging with Reference to External and Skeletal Features, Behaviour and Locomotory Habits

1997

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Burtsch. P.. Gembd/a. S. & Piotrowski. T. 1997. The embryonic and larval development of Polyptrrus senegalus Cuvier, 1829: its staging with reference to external and skeletal features, behaviour and locomotory habits.-Actci Zuologica (Stockholm) 78: 309-328.The embryonic and larval development of the Polypteriformes, the presumed sister group of all other living actinopterygians, is poorly known. The main reason is the scarcity of successful breedings in captivity and therefore the lack of developmental series of any one polypterid species. A series of five successful breedings of P. senegcilus now makes it possible to define developmental stages of this species based on numerous closely timed specimens. The staging given here focuses on external embryonic and larval features: epidermal surface structures documented by SEM, colour pattern, development of fins and squamation, larval feeding and locomotory behaviour. The development of P. senegalus is characterized by a long free embryonic phase. Suction feeding is performed from the beginning of larval life (apterolarval phase). The pectoral fins start to become employed for slow locomotion and as supportive structures at around the same time. Olfactorily guided prey capture, however, is observed later in the pterolarval phase. Quantitative kinematic data also demonstrate a change in the mode of undulatory locomotion during this phase. Sustained axial undulation becomes confined to the posterior abdominal and caudal region of the body. At about the same time the paraxial high frequency undulation of the pectoral fin fold is replaced by the characteristic propeller-like movement of much greater amplitude and wavelength. Surfacing for aerial breathing is not seen before a marked change in colouration has taken place at the beginning of the juvenile period. The external gills slowly become reduced during this period. The definitions of larval and juvenile stages given here may advance understanding of developmental processes in the ontogeny of these primitive actinopterygians, and may serve as a tool for comparison with the ontogeny of Tetrapoda and Dipnoi, as well as to that of some "primitive" groups of Actinopterygii. Judging from its distribution among extant taxa, embryonic and larval ciliation is a character that most probably belongs to the grundplan$ of Osteognathostomata. Phylogenetic evaluation is not so clear for the two other prominent embryonic and larval specializations found in Polypterus: upper labial attachment glands and opercular external gills. 0 1997 The Royal Swedish Academy of Sciences.Published by

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Section: Introductionsupporting

confidence: 64%

Section: Introductionmentioning

confidence: 99%

The Embryonic and Larval Development of Polypterus senegalusCuvier, 1829: its Staging with Reference to External and Skeletal Features, Behaviour and Locomotory Habits

1997

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“…For actinopterygians, a single basibranchial copula has been considered the ancestral condition that can be observed in polypteriforms (Gardiner, ), the most basal extant actinopterygian taxon. In extant polypteriforms, the hyoid arch and gill arches articulate with a single basibranchial copula (Allis, ; Daget, Bauchot, Bauchot, & Arnoult, ; Jollie, ). However, polypteriforms are highly derived, as they have only four gill arches and the most posterior gill arch is represented by a ceratobranchial only (Britz & Johnson, ).…”

Section: Discussionmentioning

confidence: 99%

Development of the skull and pectoral girdle in Siberian sturgeon,Acipenser baerii, and Russian sturgeon,Acipenser gueldenstaedtii(Acipenseriformes: Acipenseridae)

Warth

Hilton

Naumann

et al. 2017

Journal of Morphology

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The head is considered the major novelty of the vertebrates and directly linked to their evolutionary success. Its form and development as well as its function, for example in feeding, is of major interest for evolutionary biologists. In this study, we describe the skeletal development of the cranium and pectoral girdle in Siberian (Acipenser baerii) and Russian sturgeon (A. gueldenstaedtii), two species that are commonly farmed in aquaculture and increasingly important in developmental studies. This study comprises the development of the neuro-, viscero- and dermatocranium and the dermal and chondral components of the pectoral girdle, from first condensation of chondrocytes in prehatchlings to the early juvenile stage and reveals a clear pattern in formation. The otic capsules, the parachordal cartilages, and the trabeculae cranii are the first centers of chondrification, at 8.4mm TL. These are followed by the mandibular, then the hyoid, and later the branchial arches. Teeth form early on the dentary, dermopalatine, and palatopterygoid, and then appear later in the buccal cavity as dorsal and ventral toothplates. With ongoing chondrification in the neurocranium a capsule around the brain and a strong rostrum are formed. Dermal ossifications start to form before closure of the dorsal neurocranial fenestrae. Perichondral ossification of cartilage bones occurs much later in ontogeny. Our results contribute data bearing on the homology of elements such as the lateral rostral canal bone that we regard homologous to the antorbital of other actinopterygians based on its sequence of formation, position and form. We further raise doubts on the homology of the posterior ceratobranchial among Actinopteri based on the formation of the hyoid arch elements. We also investigate the basibranchials and the closely associated unidentified gill-arch elements and show that they are not homologous. J. Morphol. 278:418-442, 2017. © 2017 Wiley Periodicals, Inc.

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“…Since the twenties many writers have rated the members of the genera Polypterus and Erpetoichthys (Calamoichthys) as actinopterygians (Goodrich 1928, Daget 1950, Gardiner 1973, 1984, Rosen et al 1981, Patterson 1982. Other contemporary writers, however, have considered them a separate group of teleostomes called Brachiopterygii (Stensio 1921, Holmgren and Stensio 1936, Jarvik 1942, 1980, Daget et al 1964, Poll 1965, Lehman 1966, Pfeiffer 1968, Nelson 1969, Jessen 1972, Beaumont 1973, Nybelin 1976, Senn 1976, Bjerring 1985a,b, 1986. Why this discrepancy?…”

Section: Introductionmentioning

confidence: 99%

The Morphology of the Organum Olfactus of a 32 mm Embryo of the Brachiopterygian Fish Polypterus senegalus

Bjerring

1988

Acta Zoologica

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Anatomically the brachiopterygian organum olfactus is unique among craniates. As revealed by the present study of Polypterus senegalus, it consists of an incurrent and an excurrent tube, a body and six lobes. Luminally these divisions are extensively covered with cilia, the actions of which cause water to flow through the organ. The proximal extremities of the two tubes communicate directly with one another, allowing water to bypass the body and the lobes. The body is subdivided by means of seven infolds into a central part and two peripheral parts. Of these, the central part directs water to the lobes; the peripheral parts drain the lobes and lead water to the excurrent tube. Each lobe has an axial portion and two rows of alternating lobuli. Interlobularly infolds of the axial portion subdivide the lobar lumen in such a way that movement of water is possible. Olfactory neurosensory cells occur in the rear of the incurrent tube, as well as in the lobes. Probably the degree of stimulation of the tubal receptors determines whether the water taken in is to bypass the lobes.

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Développement du chondrocrâne et des arcs aortiques chezPolypterus senegalusCuvier

Cited by 16 publications

References 4 publications

The Embryonic and Larval Development of Polypterus senegalusCuvier, 1829: its Staging with Reference to External and Skeletal Features, Behaviour and Locomotory Habits

The Embryonic and Larval Development of Polypterus senegalusCuvier, 1829: its Staging with Reference to External and Skeletal Features, Behaviour and Locomotory Habits

Development of the skull and pectoral girdle in Siberian sturgeon,Acipenser baerii, and Russian sturgeon,Acipenser gueldenstaedtii(Acipenseriformes: Acipenseridae)

The Morphology of the Organum Olfactus of a 32 mm Embryo of the Brachiopterygian Fish Polypterus senegalus

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