The placenta and cardiac foramen ovale of the babirusa (Babyrousa babyrussa)

Macdonald, Alastair A.

doi:10.1007/bf00235496

Cited by 12 publications

(10 citation statements)

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“…2005). The traditional clustering of the hippopotamids with the suids (pigs) and tayassuids (peccaries) to form the Suiformes is not supported by the molecular data nor by the significant differences found between the hippos and the pig‐like animals in the structure of this fold of cardiac tissue (Macdonald, 1988, 1994). The nomenclature used here for Hippopotamidae is that of Boisserie (2005).…”

Section: Discussionmentioning

confidence: 96%

Comparative anatomy of the foramen ovale in the hearts of cetaceans

2007

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The structure of the cardiac foramen ovale from 17 species representing six cetacean families, the Monodontidae, Phocoenidae, Delphinidae, Ziphiidae, Balaenidae and the Balaenopteridae, was studied using the scanning electron microscope. Eight white whale fetuses ( Delphinapterus leucas ) and a narwhal fetus ( Monodon monoceros ) represented the Monodontidae; one fetal and nine neonatal harbour porpoises ( Phocoena phocoena ) and a finless porpoise fetus ( Neophocoena phocoenoides ) represented the Phocoenidae; two white-beaked dolphin fetuses ( Lagenorhynchus albirostris ), four fetal and one neonatal Atlantic white-sided dolphins ( Lagenorhynchus acutus ), a Risso's dolphin fetus ( Grampus griseus ), two common bottle-nosed dolphin neonates ( Tursiops truncatus ), a female short-beaked common dolphin fetus ( Delphinus delphis ), four killer whale fetuses ( Orcinus orca ) and two long-finned pilot whale fetuses ( Globicephala melas ) represented the Delphinidae; two northern bottlenose whale fetuses ( Hyperoodon ampullatus ) represented the Ziphiidae; one bowhead whale fetus ( Balaena mysticetus ) represented the Balaenidae and five Common minke whale fetuses ( Balaenoptera acutorostrata ), one blue whale fetus ( Balaenoptera musculus ), nine fin whale fetuses ( Balaenoptera physalus ) and four humpback whale fetuses ( Megaptera novaeangliae ) represented the Balaenopteridae. The hearts of an additional two incompletely identified toothed and four baleen whale fetuses were also studied. In each species the fold of tissue derived from the cardiac septum primum and subtended by the foramen ovale had the appearance of a short tunnel or sleeve which was fenestrated at its distal end. In the toothed whales the tissue fold was tunnel-shaped with the interatrial septum as the floor whereas in baleen whales it was more sleeve-like. In toothed whales thin threads extended from the fold to insert into the interatrial septum whereas a network of threads covered the distal end of the sleeve in the baleen whales. Similar structures were present in the corresponding cardiac tissues of neonatal Hippopotamidae.

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Section: Discussionmentioning

confidence: 96%

Comparative anatomy of the foramen ovale in the hearts of cetaceans

2007

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“…Little is known about the evolutionary history of this peculiar species, mainly because of a complete lack of extinct or extant closely related species. Babyrousa is anatomically distinct from other Suidae (156)(157)(158)(159) and is restricted to remote areas of Island Southeast Asia (i.e., Sulawesi, Buru and the the Togean Islands, Masbate, Taliabu, and Samana). Thus, this enigmatic species could be considered a relic of the once diverse but now extinct Miocene Suidae.…”

Section: The Enigmatic Babyrousamentioning

confidence: 99%

The Evolution of Suidae

Frantz

Meijaard

Gongora

et al. 2016

Annu. Rev. Anim. Biosci.

105

111

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The Suidae are a family of Cetartiodactyla composed of 17 species classified in a minimum of five extant genera that originated at least 20 million years ago. Their success is evident in the multitude of habitats in which they are found as both natural and feral populations in tropical Island Southeast Asia, the high plateau of the Himalayas, Siberia, North Africa, the Pacific Islands, Australia, and the Americas. Morphological and molecular analyses of these species have revealed numerous aspects of their biology, including the ease with which many lineages have and continue to hybridize. This trait has made them an ideal model for evolutionary biologists. Suid species have also shared a deep history with humans, from their association with early hominids in Africa to their domestication. Here we review the current knowledge of this fascinating group and provide a comprehensive evolutionary history from the Oligocene to the present day.

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“…The distal end of the septum primum was straightedged in the seal and did not feature the network of threads seen in the cow, sheep, and horse. It was generally similar in its tunnel-like structure to that seen in wild pigs, but its relative length was less (Macdonald 1988(Macdonald , 1994. However, it was larger than the simple flap of tissue seen in the human (Patten 1931).…”

Section: Discussionmentioning

confidence: 88%

Comparative anatomy of the cardiac foramen ovale in the Pinnipedia

Macdonald¹,

Dixon²,

Boyd³

1995

Can. J. Zool.

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The structure of the cardiac foramen ovale from eight genera of pinnipeds was studied using the scanning electron microscope. Specimens were obtained from fetuses or neonates of the Californian sea lion (Zalophus californianus), Antarctic fur seal (Arctocephalus gazella), walrus (Obenus rosmurus), grey seal (Halichoerus gryphus), ringed seal (Phoca hispida), bearded seal (Erignathus barbatus), Weddell seal (Leptonychotes weddelli), and crabeater seal (Lobodon carcinophagus). In each species, the structure that permits oxygenated blood from the placenta flowing in the caudal vena cava to pass directly into the left side of the heart, the foramen ovale, when viewed from the terminal part of the caudal vena cava had the appearance of the entrance to a short tunnel. A thin fold of tissue, the developed remains of the septum primum, projected from the caudal edge of the foramen ovale into the lumen of the left atrium. It constituted about 75% of the inner surface of the tunnel, and was generally unfenestrated. The wall of the interatrial septum contributed the "floor." The distal end of the tunnel was straight-edged. In most cases the septum primum was long enough to cover the foramen ovale. The siting of pulmonary veins in the roof of the left atrium appeared to be such that drainage from them after birth would press the septum primum over the foramen opening, thereby functionally closing it. Collapses of the tunnel was seen in all the neonatal seals, and in the 1-month-old neonate the fold of tissue was anchored to the interatrial septum along the surface of the crista dividens, which lay in the left atrium. Cellular protrusions and thread formation may play a role in the closure of the foramen ovale.RCsumC : La structure du foramen ovale a Ct C CtudiCe au microscope Clectronique h balayage chez huit genres de pinnipkdes. Les organes not Ct C prClevCs chez des fCtus ou des nouveau-nCs de l'Otarie de Californie (Zalophus californianus), de I'Otarie de Kerguelen (Arctocephalus gazella), du Morse (Odobenus rosmurus), du Phoque gris (Halichoerus gryphus), du Phoque annelC (Phoca hispida), du Phoque barbu (Erignathus barbatus), du Phoque de Weddell (Leptonychotes weddelli) et du Phoque crabier (Lobodon carcinophagus). Vu de la partie terminale de la veine cave postdrieure, le foramen ovale, structure qui permet au sang oxygCnC provenant du placenta par la veine cave de passer directement dans la partie gauche du coeur, a l'apparence de I'entrCe d'un tunnel court chez chacune des espkces. Un mince repli de tissu, vestige du septum primaire, est issu de la bordure caudale du trou et se prolonge jusque dans la lumittre de l'oreillette gauche. Ce repli constitue environ 75% de la surface interne du tunnel et ne comporte gCnCralement pas de pores; la paroi du septum interatrial constitue le N plancher ,,. Le bord distal du "tunnel" est droit. Dans la plupart des cas, le septum primaire est suffisamment long pour couvrir le foramen ovale. La position des veines pulmonaires dans le plafond de l'oreillette gauche permet de suppo...

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The placenta and cardiac foramen ovale of the babirusa (Babyrousa babyrussa)

Cited by 12 publications

References 11 publications

Comparative anatomy of the foramen ovale in the hearts of cetaceans

Comparative anatomy of the foramen ovale in the hearts of cetaceans

The Evolution of Suidae

Comparative anatomy of the cardiac foramen ovale in the Pinnipedia

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