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- Epipubic_bone abstract "Epipubic bones are a pair of bones projecting forward from the pelvic bones of modern marsupials and most non-placental fossil mammals: multituberculates, monotremes, and even basal eutherians (the ancestors of placental mammals). They first occur in tritylodontids, suggesting that they are a synapomorphy between them and Mammaliformes. Only placentals, and possibly the early mammaliformes Megazostrodon and Erythrotherium, lack them.In modern marsupials the epipubic bones are often called \"marsupial bones\" because they support the mother's pouch (\"marsupium\" is Latin for \"pouch\"), but their presence on other groups of mammals indicates that this was not their original function, which some researchers think was to assist locomotion by supporting some of the muscles that flex the thigh.The epipubic bones were first described in 1698 but their functions have remained unresolved. It has been suggested that they form part of a kinetic linkage stretching from the femur on one side to the ribs on the opposite side. This linkage is formed by a series of muscles: each epipubic bone is connected to the femur by the pectineus muscle, and to the ribs and vertebrae by the pyramidalis, rectus abdominis, and external and internal obliques. According to this hypothesis, the epipubic bones act as levers to stiffen the trunk during locomotion.Placentals are the only mammal lineage which lacks epipubic bones, and this absence has been considered to be correlated to the development of the placenta itself; epipubic bones stiffen the torso, preventing the expansion necessary for prolonged pregnancy. However, vestiges of the epipubic bone may survive in a common placental characteristic, the baculum.".
- Epipubic_bone thumbnail Macropus_major_hind_legs.png?width=300.
- Epipubic_bone wikiPageID "14724514".
- Epipubic_bone wikiPageLength "4231".
- Epipubic_bone wikiPageOutDegree "27".
- Epipubic_bone wikiPageRevisionID "686243064".
- Epipubic_bone wikiPageWikiLink Abdominal_external_oblique_muscle.
- Epipubic_bone wikiPageWikiLink Abdominal_internal_oblique_muscle.
- Epipubic_bone wikiPageWikiLink Anatomical_terms_of_motion.
- Epipubic_bone wikiPageWikiLink Baculum.
- Epipubic_bone wikiPageWikiLink Basal_(phylogenetics).
- Epipubic_bone wikiPageWikiLink Category:Mammal_anatomy.
- Epipubic_bone wikiPageWikiLink Erythrotherium.
- Epipubic_bone wikiPageWikiLink Eutheria.
- Epipubic_bone wikiPageWikiLink Evolution_of_mammals.
- Epipubic_bone wikiPageWikiLink Mammaliaformes.
- Epipubic_bone wikiPageWikiLink Marsupial.
- Epipubic_bone wikiPageWikiLink Megazostrodon.
- Epipubic_bone wikiPageWikiLink Monotreme.
- Epipubic_bone wikiPageWikiLink Multituberculata.
- Epipubic_bone wikiPageWikiLink Obturator_process.
- Epipubic_bone wikiPageWikiLink Pectineus_muscle.
- Epipubic_bone wikiPageWikiLink Pelvic_digit.
- Epipubic_bone wikiPageWikiLink Pelvis.
- Epipubic_bone wikiPageWikiLink Placenta.
- Epipubic_bone wikiPageWikiLink Placentalia.
- Epipubic_bone wikiPageWikiLink Proximodorsal_process.
- Epipubic_bone wikiPageWikiLink Pyramidalis_muscle.
- Epipubic_bone wikiPageWikiLink Rectus_abdominis_muscle.
- Epipubic_bone wikiPageWikiLink Synapomorphy.
- Epipubic_bone wikiPageWikiLink Tritylodontidae.
- Epipubic_bone wikiPageWikiLink File:Macropus_major_hind_legs.png.
- Epipubic_bone wikiPageWikiLinkText "Epipubic bone".
- Epipubic_bone wikiPageWikiLinkText "epipubic bone".
- Epipubic_bone wikiPageUsesTemplate Template:Reflist.
- Epipubic_bone wikiPageUsesTemplate Template:Wikt.
- Epipubic_bone subject Category:Mammal_anatomy.
- Epipubic_bone hypernym Pair.
- Epipubic_bone type Mammal.
- Epipubic_bone type Place.
- Epipubic_bone type Mammal.
- Epipubic_bone comment "Epipubic bones are a pair of bones projecting forward from the pelvic bones of modern marsupials and most non-placental fossil mammals: multituberculates, monotremes, and even basal eutherians (the ancestors of placental mammals). They first occur in tritylodontids, suggesting that they are a synapomorphy between them and Mammaliformes.".
- Epipubic_bone label "Epipubic bone".
- Epipubic_bone sameAs Q176946.
- Epipubic_bone sameAs Os_epipúbic.
- Epipubic_bone sameAs Beutelknochen.
- Epipubic_bone sameAs m.03gvmpr.
- Epipubic_bone sameAs Сумчатые_кости.
- Epipubic_bone sameAs Q176946.
- Epipubic_bone wasDerivedFrom Epipubic_bone?oldid=686243064.
- Epipubic_bone depiction Macropus_major_hind_legs.png.
- Epipubic_bone isPrimaryTopicOf Epipubic_bone.