The Journal of the Geological Society of Japan
Online ISSN : 1349-9963
Print ISSN : 0016-7630
ISSN-L : 0016-7630
Volume 43, Issue 514
Displaying 1-4 of 4 articles from this issue
  • [in Japanese]
    1936 Volume 43 Issue 514 Pages 493-530
    Published: 1936
    Released on J-STAGE: April 11, 2008
    JOURNAL FREE ACCESS
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  • [in Japanese]
    1936 Volume 43 Issue 514 Pages 531-541
    Published: 1936
    Released on J-STAGE: April 11, 2008
    JOURNAL FREE ACCESS
    Download PDF (1029K)
  • [in Japanese], [in Japanese]
    1936 Volume 43 Issue 514 Pages 542-550
    Published: 1936
    Released on J-STAGE: April 11, 2008
    JOURNAL FREE ACCESS
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  • Tokio SHIKAMA
    1936 Volume 43 Issue 514 Pages 557-564
    Published: 1936
    Released on J-STAGE: April 11, 2008
    JOURNAL FREE ACCESS
    Parastegodon is a valid genus, though it little differs from the genus Stegodon, and soecialization is continuous from one to another., Japanese species of Parastegodon are closely related to the Malayan forms of the so-called Stegodon (mindanensis, trigonocephalus and airawana); the latter like the former are distinct from the genotype of Stegodon., Parastegodon contains the following species; P., aurorae (MATSUMOTO), P., mindanensis (NAUMANN) MATSUMOTO, P., infrequens SHIKAMA and P., kwantoensis TOKUNAGA., From dental and cranological characters, Parastegodon is classified into three groups of airawana, akashiensis-aurorae and infrequens-kwantoensis., It is an oriental stock, having intermediate characters between Stegodon and Archidiskodon., In Japan it seems to have dissappeared at the end of the Tertiary owing to its catagenetic declination.,
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