File:The biology of the amphibia (1931) (20195618789).jpg

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Title: The biology of the amphibia
Identifier: biologyofamphibi00nobl (find matches)
Year: 1931 (1930s)
Authors: Noble, Gladwyn Kingsley, 1894-1940
Subjects: Amphibians
Publisher: New York : McGraw-Hill
Contributing Library: ASC - York University Libraries
Digitizing Sponsor: York University - University of Toronto Libraries

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122 THE BIOLOGY OF THE AMPHIBIA and D. fuscus carolinensis, the male exhibits an increasing ten- dency to lose its vomerine teeth in adult life and to reduce the anterior part of the parasphenoid tooth patches. Leurognathus marmorata intermedia, which has been derived from D. quadra-
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Fig. 44.—The reappearance of male characters in both sexes of other species. The nuptial spines, usually characteristic of the male frog, occur in the female Crossodactylus gaudichaudii (A) nearly as well developed as in the male (B). The vomerine teeth are lacking in the male Desmognathus fuscus (D) but present in the female (E). In the related Leurognathus marmorata marmorata (C) both sexes lack vomerine teeth. The skulls are viewed ventrally, the forelimbs dorsally. Pt., parasphenoid teeth patches; Vt., vomerine teeth. maculatus, has the vomerine teeth absent in the males like the more advanced species of Desmognathus. In L. m. marmorata this loss occurs in both sexes and is called a "specific character" (Fig. 44). The loss might be considered an adaptation to aquatic life except that the terrestrial D. /. carolinensis and the aquatic L. m. intermedia both show the initial stage in tooth loss. Again,

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  • bookid:biologyofamphibi00nobl
  • bookyear:1931
  • bookdecade:1930
  • bookcentury:1900
  • bookauthor:Noble_Gladwyn_Kingsley_1894_1940
  • booksubject:Amphibians
  • bookpublisher:New_York_McGraw_Hill
  • bookcontributor:ASC_York_University_Libraries
  • booksponsor:York_University_University_of_Toronto_Libraries
  • bookleafnumber:140
  • bookcollection:YorkUniversity
  • bookcollection:ontario_council_university_libraries
  • bookcollection:toronto
  • BHL Collection
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7 August 2015
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This work is in the public domain because it was published in the United States between 1929 and 1963, and although there may or may not have been a copyright notice, the copyright was not renewed. For further explanation, see Commons:Hirtle chart and the copyright renewal logs. Note that it may still be copyrighted in jurisdictions that do not apply the rule of the shorter term for US works (depending on the date of the author's death), such as Canada (70 years p.m.a.), Mainland China (50 years p.m.a., not Hong Kong or Macao), Germany (70 years p.m.a.), Mexico (100 years p.m.a.), Switzerland (70 years p.m.a.), and other countries with individual treaties.

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