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Wiktionary英語版での「heterodont」の意味 |
heterodont
語源
From hetero- (prefix meaning ‘different’) + -odont (suffix meaning ‘tooth; toothed’).[1] Hetero- is derived from Ancient Greek ἕτερος (héteros, “one または the other of two; different”), ultimately from Proto-Indo-European *sem- (“together; one”); while -odont is from Ancient Greek ὀδούς (odoús, “tooth; tusk”), ultimately from Proto-Indo-European *h₃ed- (“to bite”) + *-ónts (suffix forming nouns denoting body parts). Synchronically, hetero- + -odont.
発音
形容詞
heterodont (not comparable)
- (zootomy) Having teeth of different types (like most mammals).
- 1873 June 19, William Henry Flower, “VI. On a Newly Discovered Extinct Ungulate Mammal from Patagonia, Homalodontotherium Cunninghami.”, in Philosophical Transactions of the Royal Society of London, volume 164, London: […] Taylor and Francis, […], published 1874, OCLC 715761850, page 175:
- The adaptation of the form of the teeth on both sides to this position, and the accurate adjustment of their contiguous surfaces, shows that it is a natural conformation. They are, moreover, of very nearly even height throughout the series, and in their configuration present a remarkable and gradual transition from the first incisor to the last molar, easily traced in both jaws, and more even and regular than in any other known heterodont mammal.
- 1882 April 18, William Henry Flower, “On the Mutual Affinities of the Animals Composing the Order Edentata”, in Proceedings of the Scientific Meetings of the Zoological Society of London, number XXV, London: […] [Zoological] Society [of London]; Longmans, Green, Reader, and Dyer, […], ISSN 0370-2774, OCLC 1131321218, page 359:
- The few common characters by which the Edentata are associated are too well known to need repetition. The principal one is the abseance of any trace of the typical heterodont and diphyodont dentition, found in a more or less modified form in all other placental mammals.
- 1894 August 1, M. F. Woodward, “On the Succession and Genesis of Mammalian Teeth”, in W. H. Dolamore, editor, The Dental Record: A Monthly Journal of Dental Science, Art, and Literature, Devoted to the Interests of the Profession, volume XIV, number 8, London; Manchester: Dental Manufacturing Company, ISSN 0266-1055, OCLC 717246788, page 375:
- The process of evolution of the specialised heterodont dentition of the Mammalia, or of the Theriodontia, from the simple homodont and polyphyodont dentition of the lower Reptilia would, I think, necessarily cause a reduction in number of the successional sets of teeth, due to an enlargement of one set and a consequent abstraction of growth, energy and material from the underlying sets.
- 1981 April 2, Keith Stewart Thomson, “An Early Triassic Hybodont Shark from Northern Madagascar”, in Postilla, number 186, New Haven, Conn.: Peabody Museum of Natural History, Yale University, published 15 February 1982, ISSN 0079-4295, OCLC 1674648, page 13, column 1:
- Finally the structure of the palate in ?Acrodus (かつ to a lesser extent, Hybodus かつ Asteracanthus) shows certain general resemblances to that of modern heterodont sharks, particularly in the lower postorbital ramus, absence of an orbital process, well-developed ethmoidal articulations and absence of a basal angle.
- 2007 March, “Dentition in Mammals”, in Mahendra Jain, editor, Competition Science Vision: A Specialized Magazine for Medical Entrance & 10+2 Exams, volume 10, number 109, Agra, Uttar Pradesh: Mahendra Jain for Pratiyogita Darpan, OCLC 939118856, page 76, column 2:
- Mammalian teeth are characteristically heterodont, i.e. teeth are dissimilar in shape and size.
- (malacology) Of bivalves or their hinge teeth: having two to three wedge-shaped cardinal teeth set in the centre near the umbones, generally also with elongated lateral teeth on the anterior and posterior margins.
- Coordinate terms: anodont, desmodont, dysodont, isodont, pachyodont, schizodont, taxodont
- 1895 March, William Healey Dall, “The Hinge Teeth”, in Contributions to the Tertiary Fauna of Florida, with Especial Reference to the Miocene Silex-beds of Tampa and the Pliocene Beds of the Caloosahatchie River (Transactions of the Wagner Free Institute of Science of Philadelphia; 3, part III), part III (A New Classification of the Pelecypoda), Philadelphia, Pa.: Wagner Free Institute of Science, […], OCLC 999429719, page 491:
- In this sense all hinges are Heterodont, and the distinction drawn by [Melchior] Neumayr between Heterodont and Desmodont teeth, so far as their situation is concerned, resolves itself into a comparison between teeth originally laterals and both in one valve, with paired laminæ in the opposite valve, on the one side; and teeth originally cardinals, or, if laterals, then laterals of which one was in one valve and one in the other, with the clasping laminæ also alternated.
- 1899, Palaeontologica Indica: Memoirs of the Geological Survey of India, volume I, Calcutta, West Bengal: Geological Survey of India, OCLC 1051225862, page 7:
- 2006, Robert Wynn Jones, “Principal Fossil Groups”, in Applied Palaeontology, Cambridge, Cambridgeshire: Cambridge University Press, →ISBN, page 124, column 2:
- The palaeoheterodonts are an extant, Ordovician–Recent, group characterised by heterodont to schizodont dentition. They are freshwater to marine. Palaeoheterodonts are exemplified by the heterodont modiomorphioid Modiolopsis, the freshwater unionoid Unio, and the schizodont trigonoids Trigonia, Myophorella and Neotrigonia.
派生語
- heterodontism
- heterodonty
関連する語
- heterodontid
- Heterodontidae
- Heterodontiformes
- heterodontosaurid
- heterodontosaur
- Heterodontosaurus
- Heterodontus
名詞
heterodont (複数形 heterodonts)
- (zoology) A heterodont animal.
- 1876, Charles S[issmore] Tomes, “The Teeth of Mammals”, in A Manual of Dental Anatomy, Human and Comparative, London: J[ohn] & A[ugustus] Churchill, […], pages 276–277:
- 1868, “Quarterly Chronicle of Microscopical Science”, in Edwin Lankester and George Busk, editors, Quarterly Journal of Microscopical Science, volume VIII (New Series; volume XVI overall), London: John Churchill and Sons, […], OCLC 154320084, pages 277–278:
- On the other hand, in the Mammalian orders with two sets of teeth, these organs are said to acquire fixed individual characters, to receive special denominations, and can be determined from species to species, being equivalent to the Heterodonts. The author [William Henry Flower] then showed that […] among the Heterodonts many were partially, and probably some completely, Monophyodonts.
- 1878 June, C. N. Peirce, “Proceedings of Dental Societies. Alumni Association of the Pennsylvania College of Dental Surgery. [The Varieties of Teeth Found in Animals; Their Muco-dermal Origin, and How the Blending of Their Different Forms in the Class Mammalia Favors the Theory that They are but Modifications from Some Common Ancestral Type.]”, in James W. White, editor, The Dental Cosmos: A Monthly Record of Dental Science. […], volume XX, number 6, Philadelphia, Pa.: Samuel S. White, […], OCLC 436524335, page 320:
- 1981 April 2, Keith Stewart Thomson, “An Early Triassic Hybodont Shark from Northern Madagascar”, in Postilla, number 186, New Haven, Conn.: Peabody Museum of Natural History, Yale University, published 15 February 1982, ISSN 0079-4295, OCLC 1674648, page 13, column 1:
- In the past, this would have been enough to allow one to suggest a close relationship between hybodonts and heterodonts. However, Campagno (1977) has recently attempted to show that hybodonts belong to a more derived position within the euselachians, specifically being allied with the galeoid oryctoloboids and lamnoids. If this is the case, the absence of the orbital process in heterodonts might be considered a highly derived condition and the overall close similarity of the palates of the two groups a convergence due perhaps to a common pattern of fore-and-aft jaw movements.
- (malacology) A heterodont bivalve.
- 1971, Robert A[llen] Cadigan, “Moenkopi Formation and Related Strata”, in Robert A. Cadigan; J. H. Stewart, Petrology of the Triassic Moenkopi Formation and Related Strata in the Colorado Plateau Region: […] (Geological Survey Professional Paper; 692), Washington, D.C.: United States Government Printing Office, OCLC 896810049, page 30, column 2:
- Ordovician actinodontoids are probably ancestral to the heterodonts, unionaceans, and trigoniaceans.
- 2000, D. C. Campbell, “Molecular Evidence on the Evolution of the Bivalvia”, in E[lizabeth] M. Harper, J[ohn] D[avid] Taylor, and J. A. Crame, editors, The Evolutionary Biology of the Bivalvia (Geological Society Special Publication; no. 177), London: Geological Society of London, →ISBN, ISSN 0305-8719, page 44, column 1:
- Finally, Carditoidea is basal not only to all other sampled heterodonts but also to Anomalodesmata. This is unexpected; although they appear to be relatively primitive heterodonts, they are mophologically similar to other heterodonts exclusive of anomalodesmatans. More molecular data for other primitive heterodonts are needed to test this result, especially Crassatelloidea and Lucinoidea.
- A snake of the genus Heterodon which is native to North America.
- 1841, “REPTILES”, in [George Long], editor, The Penny Cyclopædia of the Society for the Diffusion of Useful Knowledge, volume XIX (Primaticcio–Richardson), London: Charles Knight and Co., […], OCLC 951659564, page 409, column 2:
- The second suborder (Macrosformes) corresponds with the Heteroderms of M. André Marie Constant Duméril. These are divided into seven families: […] 4. the Heterodonts, (Dendrophis, Coronella, &c.); […]
派生語
- palaeoheterodont
参照
- ^ “heterodont, adj. and n.”, in OED Online , Oxford, Oxfordshire: Oxford University Press, December 2019.
ウィキペディア英語版での「heterodont」の意味 |
Heterodont
出典:『Wikipedia』 (2011/07/30 02:32 UTC 版)
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