Results 161 to 170 of about 1,753 (201)
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2009
Abstract Monotremes are the sole living representatives of the mammalian Subclass Prototheria (1). Living monotremes have traditionally been viewed as the descendants of pre-tribosphenic mammalian ancestors that lacked the distinctive tribosphenic molar that is capable of both shearing and grinding functions.
Mark S Springer, Carey W Krajewskib
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Abstract Monotremes are the sole living representatives of the mammalian Subclass Prototheria (1). Living monotremes have traditionally been viewed as the descendants of pre-tribosphenic mammalian ancestors that lacked the distinctive tribosphenic molar that is capable of both shearing and grinding functions.
Mark S Springer, Carey W Krajewskib
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Tactile neural mechanisms in monotremes
Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology, 2003Monotremes, perhaps more than any other order of mammals, display an enormous behavioural reliance upon the tactile senses. In the platypus, Ornithorhynchus anatinus, this is manifest most strikingly in the special importance of the bill as a peripheral sensory organ, an importance confirmed by electrophysiological mapping that reveals a vast area of ...
M J, Rowe +4 more
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The marsupial and monotreme thymus, revisited
Journal of Zoology, 2001 Copyright © 2001 The Zoological Society of LondonThe anatomy and histology of the thymus in monotremes and marsupials were revisited and several new observations made.
Haynes, J., Julie Irene Haynes
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2018
Knowledge of reproduction in monotremes is considered, particularly the genes involved. Male reproduction examines the production, bundle formation and capacitation of spermatozoa, fertilization, and the roles of the epididymis, prostate glands, Cowper’s glands and the crural system.
Jones, Russell Campbell +2 more
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Knowledge of reproduction in monotremes is considered, particularly the genes involved. Male reproduction examines the production, bundle formation and capacitation of spermatozoa, fertilization, and the roles of the epididymis, prostate glands, Cowper’s glands and the crural system.
Jones, Russell Campbell +2 more
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The Structure and Development of the Hairs of Monotremes and Marsupials: Part I.—Monotremes
Journal of Cell Science, 1899ABSTRACT IN his paper dealing with the structure of the bill and hairs of Ornithorhynchus,1 Mr. Poulton has described the structure of the hair in an embryo of Ornithorhynchus measuring 8·3 cm. long, in which the larger hairs had appeared above the surface of the skin. Thanks to the kindness of Professor J. T.
Baldwin Spencer, Georgina Sweet
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Conceptus Coats of Marsupials and Monotremes
2018Mammals evolved from oviparous reptiles that laid eggs in a dry, terrestrial environment, thus requiring large amounts of yolk to support development and tough, outer coats to protect them. Eutherian mammals such as humans and mice exhibit an "extreme" form of viviparity in which yolk and conceptus coats have become largely redundant.
Stephen, Frankenberg, Marilyn B, Renfree
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Thermoregulation in monotremes: riddles in a mosaic
Australian Journal of Zoology, 2009The three extant genera of the Monotremata have evolved, probably from a pre-Cretaceous Gondwanan origin, independently of the Theria to display a variety of ancestral and derived features. A comparison of their thermoregulation reveals a diversity of physiology that might represent both plesiomorphic and apomorphic elements within this mosaic.
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Chemoarchitecture of the Monotreme Olfactory Bulb
Brain, Behavior and Evolution, 2006The cyto- and chemoarchitecture of the olfactory bulb of two monotremes (shortbeaked echidna and platypus) was studied to determine if there are any chemoarchitectural differences from therian mammals. Nissl staining in conjunction with enzyme reactivity for NADPH diaphorase, and immunoreactivity for calcium binding proteins (parvalbumin, calbindin and
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The caecum of monotremes and marsupials
The Transactions of the Zoological Society of London, 1954SUMMARY. A description is given of the caecal region of the gut in a number of monotremes and marsupials, covering most genera, some of which are now very rare and possibly even extinct. As in a previous memoir, particular attention is given to the peritoneal folds attached to the viscus and to its blood supply.
W. C. Osman Hill, R. E. Rewell
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2013
Neurobiology of Monotremes brings together current information on the development, structure, function and behavioural ecology of the monotremes. The monotremes are an unusual and evolutionarily important group of mammals showing striking behavioural and physiological adaptations to their niches.
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Neurobiology of Monotremes brings together current information on the development, structure, function and behavioural ecology of the monotremes. The monotremes are an unusual and evolutionarily important group of mammals showing striking behavioural and physiological adaptations to their niches.
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