Serological Evidence on Lagomorph Relationships

Moody, Paul A.; Cochran, Velma A.; Drugg, Helen

doi:10.1111/j.1558-5646.1949.tb00002.x

Cited by 19 publications

(7 citation statements)

References 18 publications

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“…Monophyly of Glires persisted in several later classifications [99]–[100], [107], [193], but monophyly has not been free from controversy [193]–[195]. Both morphological [101], [194], [196]–[198] and molecular investigations [199]–[204] have either allied Rodentia or Lagomorpha with various other placental mammal taxa, or else rendered the groups within Glires paraphyletic with varying levels of robusticity. Despite the ambiguity of rodent and lagomorph affinites in earlier studies, a unified Glires is supported by many recent phylogenetic analyses [6], [66], [69], [98], [112], [141], [205]–[212].…”

Section: Resultsmentioning

confidence: 99%

Comparative Anatomy of the Bony Labyrinth (Inner Ear) of Placental Mammals

2013

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BackgroundVariation is a naturally occurring phenomenon that is observable at all levels of morphology, from anatomical variations of DNA molecules to gross variations between whole organisms. The structure of the otic region is no exception. The present paper documents the broad morphological diversity exhibited by the inner ear region of placental mammals using digital endocasts constructed from high-resolution X-ray computed tomography (CT). Descriptions cover the major placental clades, and linear, angular, and volumetric dimensions are reported.Principal FindingsThe size of the labyrinth is correlated to the overall body mass of individuals, such that large bodied mammals have absolutely larger labyrinths. The ratio between the average arc radius of curvature of the three semicircular canals and body mass of aquatic species is substantially lower than the ratios of related terrestrial taxa, and the volume percentage of the vestibular apparatus of aquatic mammals tends to be less than that calculated for terrestrial species. Aspects of the bony labyrinth are phylogenetically informative, including vestibular reduction in Cetacea, a tall cochlear spiral in caviomorph rodents, a low position of the plane of the lateral semicircular canal compared to the posterior canal in Cetacea and Carnivora, and a low cochlear aspect ratio in Primatomorpha.SignificanceThe morphological descriptions that are presented add a broad baseline of anatomy of the inner ear across many placental mammal clades, for many of which the structure of the bony labyrinth is largely unknown. The data included here complement the growing body of literature on the physiological and phylogenetic significance of bony labyrinth structures in mammals, and they serve as a source of data for future studies on the evolution and function of the vertebrate ear.

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Section: Resultsmentioning

confidence: 99%

Comparative Anatomy of the Bony Labyrinth (Inner Ear) of Placental Mammals

2013

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“…Although superficially resembling bison, muskoxen have many characteristics in common with sheep and goats (Moody, 1958;Tener, 1965;Rowellef ai, 1987) and are in the same subfamily (Caprinae) (Simpson, 1945). However, their lack of close relatives, chromosomal differences (2N = 48) and adaptation to an arctic environment make this species of particular comparative interest.…”

Section: Introductionmentioning

confidence: 99%

Progesterone, oestradiol-17 and LH during the oestrous cycle of muskoxen (Ovibos moschatus)

Rowell

Flood²

1988

Reproduction

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“…As indicated by its generic name, Ovibos, the muskox is believed to have characteristic in common with both sheep and cattle, but has more serological similarities to sheep and goats than to cattle and bison (Moody, 1958). Nevertheless, the metacentric chromosomes of the muskox differ from the metacentrics of sheep, and therefore must have arisen independently (Heck, Wurster and Benirschke, 1968).…”

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confidence: 99%