TY - JOUR
T1 - Extreme adaptability to light, in the round pupil of the snake spalerosophis
AU - Werner, Yehudah L.
PY - 1970/11
Y1 - 1970/11
N2 - In the colubrid snake Spalerosophis diadema diffordi from the Negev desert, Israel, the area of the circular pupil when dark adapted is 17-21 times greater than when adapted to 67,500 lx. This range of adaptability greatly exceeds that found in four other colubrid species with round pupils, and resembles that found in the vertical pupil of the lizard Hophdactylus. Ecologically, Spalerosophis is diurnal in winter but nocturnal or crepuscular in the warm season. Taxonomically, the mobile pupil may augment the disputed distinction between the similar genera Spalerosophis and Coluber.
AB - In the colubrid snake Spalerosophis diadema diffordi from the Negev desert, Israel, the area of the circular pupil when dark adapted is 17-21 times greater than when adapted to 67,500 lx. This range of adaptability greatly exceeds that found in four other colubrid species with round pupils, and resembles that found in the vertical pupil of the lizard Hophdactylus. Ecologically, Spalerosophis is diurnal in winter but nocturnal or crepuscular in the warm season. Taxonomically, the mobile pupil may augment the disputed distinction between the similar genera Spalerosophis and Coluber.
UR - http://www.scopus.com/inward/record.url?scp=0014879850&partnerID=8YFLogxK
U2 - 10.1016/0042-6989(70)90033-7
DO - 10.1016/0042-6989(70)90033-7
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C2 - 5508962
AN - SCOPUS:0014879850
SN - 0042-6989
VL - 10
SP - 1159-1160,IN3-IN4,1161-1164
JO - Vision Research
JF - Vision Research
IS - 11
ER -