Ontogenie und Entwicklungsphysiologie der Säugetiere

Starck, Dietrich

doi:10.1515/9783110836707

Cited by 28 publications

(10 citation statements)

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“…The early development of the aviarz and reptifiarz olfactory organ falls in three successive phases similar to those of mammals, viz. placodal, foveal and saccal (Matthes 1934;Starck 1959;Yntema 1968;Yee & Abbott 1978;Ferguson 1984Ferguson , 1985. The only minor difference is that the oronasal membrane does not arise at the transition from the foveal to the saccal phase in birds and reptiles.…”

Section: Observations Interpretations and Discussionmentioning

confidence: 99%

Apertures of Craniate offactory Organs

Bjerring

1989

Acta Zoologica

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Bjerring. H. C. 1989. Apertures of craniate olfactory organs.-Acra zool.. Smckh. 70: 71-85.The olfactory organs of craniates appear to derive from an anterior pair of erstwhile branchiothyria and their adjacent epidermal, neurogenic placodes. The organ is termed saccus nasalis if its source is the ectobranchial invagination of the branchiothyrium, and the saccus rhinulis if its source is the entobranchial evagination of the branchiothyrium. Nasal sacs occur in gnathostomes and lampreys. and rhinal sacs in hagfish. It is difficult, therefore, to avoid the conclusion that the olfactory organ has evolved more than once. The rhinal sac has only one aperture, the postica, which represents an internal branchiothyric orifice. Partial fusion of the right and the left rhinal sac led to the development of a postica communis. The nasal sac has either one, two or three apertures. Altogether there are nine different aperturae sacci nasalis. viz. the naris, the foris. the tremiscus. the two nariculae, the rimilla, the portula, the opiscus and the janua. The janua represents an external branchiothyric orifice and occurs in lampreys. The naris and the foris arose by subdivision of the orifice from which the janua emanated; they are found in osteolepipods. The naris is also found in urodeles, porolepiforms and some teleosts. The incurrent and excurrent naricules resulted from bipartition of a naris and are present in actinopterygians, coelacanthiforms, brachiopterygians, dipnoans and elasmobranchiomorphs. Of the four remaining openings of the nasal sacs the rimilla results from an inpushing of the epidermis, the portula from an outpocketing of the nasal sac. and the tremiscus from a combination of two such movements, the one inward and the other outward. Rimillae occur in cyprinodonts. anurans, urodeles. caecilians and porolepiforms, portulae in uranoscopids and bathydraconids. and tremisci in urodeles and porolepiforms. The opiscus, finally, is the opening through which the vomeronasal organ communicates with the oral cavity. It occurs in most lizards and snakes and probably also in some mammals. H. C. Bjerring. Depurtineiit of Pu1ueozoolog.y. Swedish Museum of Naturul Hislory. S-104 05 Stockholm. Swedeit

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Section: Observations Interpretations and Discussionmentioning

confidence: 99%

Apertures of Craniate offactory Organs

Bjerring

1989

Acta Zoologica

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“…Anatomical research continued into the 1950s, accompanied by physiological and experimental approaches. Comprehensive compilations of what was known about mammalian placentation were published by Amoroso () and Starck (). Research by Maurice Panigel (Fig.…”

Section: Historical Backgroundmentioning

confidence: 99%

Morphological specializations for fetal maintenance in viviparous vertebrates: An introduction and historical retrospective

Blackburn

Starck

2015

Journal of Morphology

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In many viviparous vertebrates, pregnant females sustain their developing embryos and provide them with nutrients by means of placentas and a diversity of other types of specializations. With this article, we introduce a virtual (online) issue of the Journal of Morphology that presents 12 recent papers on fetal maintenance in viviparous vertebrates. We also outline the history of research in this area and document the central role of morphology in helping to explain the function and evolution of specializations for fetal nutrition. This virtual issue of the Journal of Morphology is an outgrowth of a symposium held under auspices of the International Congress of Vertebrate Morphology. The included papers reflect a diversity of taxa, research methods, and biological issues. To celebrate the publication of this virtual issue of the Journal of Morphology, the publisher is making freely available to readers a number of other relevant papers published in the journal over the past 128 years. J. Morphol. 276:E1-E16,

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“…Several antelopes, however, approach an oligocotyledonary state. Thus 6 placentomes were reported in a bush duiker (Cephalophini) (Starck, 1959), 6-8 in the Royal antelope (Neotragus pygmaeus) (Neotragini) (Benirschke, 2012), 14 in the klipspringer (O. oreotragus) (Oreotragini) and 28 in Phillips's dikdik (Madoqua phillipsi) (Antilopini) (Starck, 1959). As mentioned above, a low cotyledon number is usual in the Reduncini.…”

Section: Placentome Numbermentioning

confidence: 94%

Evolution of placentation in cattle and antelopes

Carter¹

2019

Anim Reprod

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Bovids have enjoyed great evolutionary success as evidenced by the large number of extant species. Several important domestic animals are from this family. They derive from both subfamilies: cattle and their kin belong to Bovinae and sheep and goats to Antilopinae. The premise of this review, therefore, is that evolution of reproduction and placentation is best understood in a context that includes antelope-like bovines and antelopes. Many key features of placentation, including hormone secretion, had evolved before bovids emerged as a distinct group. Variation nevertheless occurs. Most striking is the difference in fusion of the binucleate trophoblast cell with uterine epithelium that yields a transient trinucleate cell in bovines and many antelopes, but a more persistent syncytium in wildebeest, sheep and goat. There is considerable variation in placentome number and villus branching within the placentome. Many antelopes have right-sided implantation in a bicornuate uterus whilst others have a uterus duplex. Finally, there has been continued evolution of placental hormones with tandem duplication of PAG genes in cattle, differences in glycosylation of placental lactogen and the emergence of placental growth hormone in sheep and goats. The selection pressures driving this evolution are unknown though maternal-fetal competition for nutrients is an attractive hypothesis.

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Ontogenie und Entwicklungsphysiologie der Säugetiere

Cited by 28 publications

References 0 publications

Apertures of Craniate offactory Organs

Apertures of Craniate offactory Organs

Morphological specializations for fetal maintenance in viviparous vertebrates: An introduction and historical retrospective

Evolution of placentation in cattle and antelopes

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