琉球産蛇類に関する新知見

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1. The present report has consisted of the classifactory study of Liopeltis in Amami and Okinawa Islands and Calliophis in Yaeyama Islands, and the study of Hemibungarus and Trimeresufrus in relation to their distribution of the Okinawa Islands. 2. Liopeltis semicarinata fritzei and Liopeltis semicarinata semicarinata have been classified as subspecies on the bases of the distinction made by the study limited on extreme of geographical variations, but these two should be considered as the same species, Liopeltis semnicarinata. 3. Calliophis iwasakii has heretofor been known as peculiar species, but the result of detailed study assures that is should be considered as subspecies, Calliophis macclellandii iwasakii. 4. Iheya, Izena, Keruma, Zamami and Tokashiki Islands have been reported as new distribution area of Hemibungarus boettgeri, and also Typhlops braminus, Lygosaurus pellopleurus and Leiolopisma laterale have newly recognized as its foods. 5. As new distribution area of Trimeresurus okinavensis, Izena, Zamami, Amuro and Keruma Islands have been reported. According to the reports published so far, the poisonous snake should not have lived in these islands, but in fact, not only Trimeresurus okinavensis but also Hemibungarus boettgeri was found there. 6. The distribution of Trimeresurus okinavensis has been thought as same as that of its genus, Trimeresurus flxvoviridis flavoviridis, but the investigation has made it is sure that its distribution is rather consistent with that of Hemibungarus boettgeri, that is, Hemibungar~ts boettgeri, Trimeresurus okinavensis and T. ftavoviridis flavoviridis live on the islands of which sea level is more than 170 meters, whereas only H. boettgeri and T. okinavensis are found on the mountainous islands of which sea level is less than 170 meters. This fact is a very interesting phenomenon.

琉球産蛇類に関する新知見

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