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x Domning, Daryl Paul; Buffrénil, Vivian de
  1991
Hydrostasis in the Sirenia: quantitative data and functional interpretations.
Mar. Mamm. Sci. 7(4): 331-368. 5 tabs. 18 figs. https://doi.org/10.1111/j.1748-7692.1991.tb00111.x Oct. 1991.
–Analyzes the distribution of skeletal mass in T. m. latirostris and the positions of the centers of gravity and buoyancy in T. inunguis, concluding that increased volume and density of bones (= "pachyosteosclerosis", a term introduced here) do indeed serve in sirs. as ballast to maintain horizontal trim and neutral buoyancy. The design and position of the lungs also seem to serve this purpose. Selection for maintenance of trim and maximization of turning moments of the flippers may help account, respectively, for loss of hind limbs and shortening of the neck. The gross anatomy of a sir. (T. inunguis) is illustrated in serial cross sections for the first time. Summarizes the distribution of pachyosteosclerosis in various fossil sirs., and concludes that this condition is fully adaptive and in no sense "pathological".

Related Index Records


40 related index terms

Age Determination
(SEE ALSO: Birth and Breeding; Embryology & Ontogeny; Growth Rates; Population Biology)
x  1991aDomning, D.P. (DD; pelvic bones; ontogenetic variation; 311-316.)
Anatomy
(SEE ALSO: Brain and Nervous System; Circulatory System; Digestive System; Embryology; Endocrinology; Growth Rates; Histology; Myology; Pathology; Respiratory System; Skeleton; Urogenital System; and under species)
x *1991Domning & de Buffrénil (distr. of skeletal mass, lung position & structure, & hydrostasis; 331-368.)
Behavior, Ingestive
(SEE ALSO: Behavior, Epimeletic; Behavior, Et-epimeletic; Food; Mastication; Milk)
x  1991Toledo & Domning (extinct dugongids; 135.)
Birth and Breeding
(SEE ALSO: Age Determination; Behavior, Sexual; Population Biology; Urogenital System)
x  1991Domning & de Buffrénil (effect of pregnancy on hydrostasis; 359.)
Brazil
x *1991Toledo & Domning (Dioplotherium cf. allisoni, cf. Rytiodus, cf. Metaxytherium; Early Mioc., Par ; 119-146.)
Conservation
(SEE ALSO: Accidental Death or Injury; Economic Uses; Hunting and Capture; Weed Control)
x  1991cDomning, D.P. (Trichechus; justifications; 167-173.)
Corystosiren Domning, 1990
x  1991Domning & de Buffrénil (pachyosteosclerosis; 361, 363.)
Corystosiren varguezi Domning, 1990
x  1991Toledo & Domning (comp. w/ Dioplotherium cf. allisoni, 124; comp. w/ cf. Rytiodus, 133, 135.)
Crenatosiren Domning, 1991
x *1991bDomning, D.P. (n.gen.; 398.)
Crenatosiren olseni (Reinhart, 1976) Domning, 1991
x *1991bDomning, D.P. (n.comb.; 398.)
Dioplotherium allisoni (Kilmer, 1965) Domning, 1978
x *1991Toledo & Domning (D. cf. allisoni; Early Mioc., Brazil; 120-130, 133-141, 143-145.)
Dioplotherium manigaulti Cope, 1883
x  1991Toledo & Domning (comp. w/ Dioplotherium cf. allisoni; 122-130.)
Dugong dugon (Müller, 1776) Palmer, 1895
x  1991Domning & de Buffrénil (hydrostatic adaptations of skeleton; 337, 358-359, 361-362.)
x  1991aDomning, D.P. (pelvic bones; sexual & ontogenetic variation; 311-316.)
Embryology and Ontogeny
(SEE ALSO: Age Determination; Growth Rates; Teratology)
x  1991aDomning, D.P. (DD; pelvic bones; ontogenetic variation; 311-316.)
Eosiren libyca Andrews, 1902
x  1991Domning & de Buffrénil (pachyosteosclerosis; 360-361.)
Eosiren stromeri (Sickenberg, 1934) Kordos, 1977
x  1991Domning & de Buffrénil (pachyosteosclerosis; 360-361.)
Eotheroides aegyptiacum (Owen, 1875) Trouessart, 1905
x  1991Domning & de Buffrénil (pachyosteosclerosis; 360.)
Halitherium olseni Reinhart, 1976
x *1991bDomning, D.P. (made the basis of Crenatosiren, n.gen.; 398.)
x  1991Toledo & Domning (comp. w/ Dioplotherium cf. allisoni, 124; comp. w/ cf. Rytiodus, 133.)
Histology
(SEE ALSO: Skeleton; other organ systems)
x  1991Domning & de Buffrénil (pachyosteosclerosis; 334-336, 358-364.)
Hydrodamalis Retzius, 1794
x  1991Domning & de Buffrénil (pachyosteosclerosis; m362.)
Individual Variation
(SEE ALSO: Skeleton)
x  1991aDomning, D.P. (DD; pelvic bones; sexual & ontogenetic variation; 311-316.)
Locomotion
(SEE ALSO: Respiration and Diving)
x *1991Domning & de Buffrénil (swimming & hydrostasis; 332-334, 359.)
Metaxytherium de Christol, 1840
x  1991Toledo & Domning (cf. Metaxytherium; Early Mioc., Brazil; 120-121, 133-134, 137, 142.)
Miocene
x  1991Toledo & Domning (Dioplotherium cf. allisoni, cf. Rytiodus, cf. Metaxytherium; Early Mioc., Brazil; 119-146.)
Miosiren Dollo, 1889
x  1991Domning & de Buffrénil (pachyosteosclerosis; m362.)
Pachyacanthus Brandt, 1873
x  1991Domning & de Buffrénil (pachyostosis; m364.)
Pathology
(SEE ALSO: Bacteriology; Biochemistry; Natural Death or Injury; Parasites; Parasitology; Pollution, Effects of; Temperature, Effects of; Teratology; Virology)
x  1991Domning & de Buffrénil (TI, TML, floating, 359-360; pachyosteosclerosis not pathological, 335-336, 363-364.)
Prorastomus Owen, 1855
x  1991Domning & de Buffrénil (pachyosteosclerosis; m360.)
Protosiren fraasi Abel, 1907
x  1991Domning & de Buffrénil (pachyosteosclerosis; 360-361.)
Prototherium de Zigno, 1887
x  1991Domning & de Buffrénil (pachyosteosclerosis; m361.)
Respiration and Diving
(SEE ALSO: Locomotion)
x *1991Domning & de Buffrénil (hydrostasis; 331-368.)
Respiratory System
x  1991Domning & de Buffrénil (position & structure of lungs & diaphragm; role in hydrostasis; 332-334, 350-357, 359.)
Rytiodus capgrandi Lartet, 1866
x  1991Toledo & Domning (comp. w/ cf. Rytiodus from Brazil; 122, 133.)
Rytiodus Lartet, 1866
x  1991Toledo & Domning (cf. Rytiodus; Early Mioc., Brazil; 121-122, 130-137, 141-145.)
Sirenotherium pirabense de Paula Couto, 1967
x  1991Toledo & Domning (considered nomen dubium; 120-121.)
Skeleton
(SEE ALSO: Age Determination; Embryology and Ontogeny; Histology; Myology; Sense Organs; Tooth Replacement; and under species)
x *1991Domning & de Buffrénil (distr. of mass; hydrostatic adaptations; 331-368.)
x  1991aDomning, D.P. (DD; pelvic bones; sexual & ontogenetic variation; 311-316.)
Trichechus inunguis (Natterer in von Pelzeln, 1883) Thomas and Lydekker, 1897
x *1991Domning & de Buffrénil (location of centers of gravity & buoyancy; hydrostatic adaptations; cross-sectional anatomy; 339-340, 347-350, 352-356, 359-360, 362-363, 366-368.)
Trichechus Linnaeus, 1758
xv 1991cDomning, D.P. (justifications for conservation; 167-173.)
Trichechus manatus latirostris (Harlan, 1824) Hatt, 1934
x  1991Domning & de Buffrénil (distr. of skeletal mass, 336-347, 362-363; pathological floating, 360.)
Xenosiren yucateca Domning, 1989
x  1991Toledo & Domning (comp. w/ Dioplotherium cf. allisoni, 123-124, 130; comp. w/ cf. Rytiodus, 132-133, 135.)