Abstract
The structures of the placenta and the cardiac foramen ovale of the babirusa (Babyrousa babyrussa) were studied by means of light and scanning electron microscopy, with material from eleven fetal and neonatal animals. The babirusa has a diffuse epitheliochorial placenta. The chorion of the term placenta is fusiform in shape, and most of its surface comprises rows of villi interrupted by round, oval or irregularly shaped aerolae. A network of fetal placental capillaries indents the epithelial layer covering the tops and sides of the interareolar villi. The round and oval areolae have slender, irregularly shaped villi. The irregular areolae have undulating surfaces without villi. The umbilical cord contains two arteries, one vein and the urachus. The foramen ovale, when viewed from the terminal part of the caudal vena cava has the appearance of a tunnel; a fold of tissue projects from the caudal edge of the foramen ovale into the lumen of the left atrium. This fold, the distal end of which is straight-edged, constitutes a large proportion of the tube, the remainder being formed by the atrial septum. Comparison of the anatomy of the placenta and heart with those of members of the Suidae and Hippopotamidae indicates that the babirusa has more characters in common with the pigs than with the hippos.
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References
Amoroso EC (1952) Placentation. In: Parkes AS (ed) Marshall's physiology of reproduction, vol 2. Longmans Green, London, pp 127–311
Amoroso EC, Hancock NA, Kellas L (1958) The foetal membranes and placenta of the hippopotamus (Hippopotamus amphibius (Linnaeus)). Proc Zool Soc Lond 130:437–454
Ashdown RR, Marrable AW (1967) Adherence and fusion between the extremities of adjacent embryonic sacs in the pig. J Anat 101:269–275
Ashdown RR, Marrable AW (1970) The development of the embryonic membranes in the pig: observations on the afterbirths. Res Vet Sci 11:227–231
Audley-Charles MG (1981) Geological history of the region of Wallace's line. In: Whitmore TC (ed) Wallace's line and plate tectonics. Clarendon, Oxford, pp 24–35
Bosma AA, Haan NA de (1981) The karyotype of Babyrousa babyrussa (Suidae, Mammalia). Acta Zool Pathol Antverp 76:17–27
Bosma AA, Haan NA de, Macdonald AA (1991) The current status of cytogenetics of the suidae, a review. Bongo, Berlin 18:258–272
Corbet GB, Glutton-Brock J (1984) Appendix: taxonomy and nomenclature. In: Mason IL (ed) Evolution of domesticated animals. Longman, London, pp 434–438
Corbet GB, Hill JE (1992) The mammals of the Indomalayan region. Oxford University Press, Oxford, pp 246–247
Dantzer V (1984) Scanning electron microscopy of exposed surfaces of the porcine placenta. Acta Anat 118:96–106
Dantzer V, Leiser R (1993) Microvasculature of regular and irregular areolae of the areola-gland subunit of the porcine placenta: structural and functional aspects. Anat Embryol 188:257–267
Franklin KJ, Amoroso EC, Barclay AE, Prichard MML (1942) The valve of the foramen ovale and its relation to pulmonary vein entries. Vet J 98:29–41
Friess AE, Sinowatz F, Skolek-Winnisch R, Trautner W (1980) The placenta of the pig. I. Fine structural changes of the placental barrier during pregnancy. Anat Embryol 158:179–191
Friess AE, Sinowatz F, Skolek-Winnisch R, Trautner W (1981) The placenta of the pig. II. The ultrastructure of the areolae. Anat Embryol 163:43–53
Garson JG (1883) Notes on the anatomy of Sus salvanius (Porcula salvania, Hodgson). Part 1: External characters and visceral anatomy. Proc Zool Soc Lond 28:413–418
Groves CP (1981) Ancestors for the pigs: taxonomy and phylogeny of the genus Sus. Technical Bullettin 3. Department of Prehistory, Research School Pacific Studies, Australian National University, Canberra
Groves CP, Grubb P (1993) The suborder suiformes. In: Oliver WLR (ed) Status survey and conservation action plan: pigs, peccaries and hippos. IUCN, Gland, pp 1–4
Kneepkens AFLM, Badoux DM, Macdonald AA (1989) Descriptive and comparative myology of the forelimb of the babirusa (Babyrousa babyrussa L. 1758). Anat Histol Embryol 18:349–365
Krahnert R (1942) Zur Anatomie des Flusspferdeherzens (Hippopotamus amphibius L. und Choeropotamus liberiensis mort.). Z Wiss Zool 155:317–342
Langer P (1988) The mammalian herbivore stomach: comparative anatomy, function and evolution. Fischer, Stuttgart
Leiser R, Dantzer V (1988) Structural and functional aspects of porcine placental microvasculature. Anat Embryol 177:409–419
Leus K, Bowles D, Bell J, Macdonald AA (1992) Behaviour of the babirusa (Babyrousa babyrussa) with suggestions for husbandry. Acta Zool Pathol Antverp 82:9–27
Macdonald AA (1976) Uterine vasculature of the pregnant pig: a scanning electron microscope study. Anat Rec 184:689–697
Macdonald AA (1981) The vascular anatomy of the pig placenta: a scanning electron microscope study. Acta Morphol Neerl-Scand 19:171–172
Macdonald AA (1988) Comparative anatomy of the foramen ovale in the Suina. Anat Embryol 178:53–57
Macdonald AA (1991a) Monographie des Hirschebers (Babyrousa babyrussa). Bongo, Berlin 18:69–84
Macdonald AA (1991b) Comparative study of functional soft tissue anatomy in pigs and peccaries. Bongo, Berlin 18:273–282
Macdonald AA (1993) The Babirusa, Babyrousa babyrussa. In: Oliver WLR (ed) Status survey and conservation action plan: pigs, peccaries and hippos. IUCN, Gland, pp 161–171
Macdonald AA, Bosma AA (1985) Notes on placentation in the Suina. Placenta 6:83–92
Macdonald AA, Kneepkens AFLM (1994) Descriptive and comparative myology of the hindlimb of the babirusa (Babyrousa babyrussa L. 1758). Anat Histol Embryol (in press)
Macdonald AA, Vorstenbosch CJAHV van (1981) Scanning electron and light microscopy of the suiform placenta: Hippopotamus amphibius and Sus scrofa. In: Young M, Boyd RDH, Longo LD, Telegdy G (eds) Placental transfer: methods and interpretations. Saunders, London, pp 244–245
Macdonald AA, Kneepkens AFLM, Kolfschoten T van, Houtekamer JL, Sondaar PY, Badoux DM (1985) Comparative anatomy of the limb musculature of some Suina. Fortschr Zool 30:95–97
Mayer C (1847) Beiträge zur Anatomie des Elephanten und der übrigen Pachydermen. Nova Acta Acad Caesar Leop Carol 22:1–88
Mossman HW (1937) Comparative morphogenesis of the fetal membranes and accessory uterine structures. Carnegie Contrib Embryol 26:129–246
Mossman HW (1953) The genital system and the fetal membranes as criteria for mammalian phylogeny and taxonomy. J Mammal 34:289–298
Mossman HW (1987) Vertebrate fetal membranes. Rutgers University Press, New Brunswick
Plasa L (1993) Internationales Zuchtbuch für den Hirscheber: International studbook for the babirusa Babyrousa babyrussa 1992. Wilhelma Zoologisch-Botanischer Garten, Stuttgart
Römer AS (1966) Vertebrate paleontology, 3rd edn. Chicago University Press, Chicago
Tobler K (1991) International studbook for the pigmy hippopotamus Choeropsis liberiensis (Morten 1844). Zoological Garden, Basel
Teuscher R (1937) Anatomische Untersuchungen über die Fruchthüllen des Zwergflusspferdes (Choeropsis liberiensis Mort.) Z Anat Entwicklungsgesch 107:555–573
Tsutsumi Y (1962) The vascular pattern of the placenta in farm animals (horse, pig, cow, sheep and rabbit). J Fac Agric Hokkaido Univ 52:372–482
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Macdonald, A.A. The placenta and cardiac foramen ovale of the babirusa (Babyrousa babyrussa). Anat Embryol 190, 489–494 (1994). https://doi.org/10.1007/BF00235496
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DOI: https://doi.org/10.1007/BF00235496