. Bonner zoologische Monographien. Zoology. 46. Discussion Because of its superficial likeness with A. boskianus, this species has often been confused and disguised. Both these species are found uniformly distribu- ted in sympatry throughout a large part of Arabia. A. opheodurus is easily distinguished by the reduced color pattern on its back. Two other character- istics which further differentiate it from A. boskianus are its short wide head and its sharply pectinate eyelids. The number of dorsal scales in A. opheod- urus varies from 29 to 36 while for the majority of A. boskianus arabian pop
. Bonner zoologische Monographien. Zoology. 46. Discussion Because of its superficial likeness with A. boskianus, this species has often been confused and disguised. Both these species are found uniformly distribu- ted in sympatry throughout a large part of Arabia. A. opheodurus is easily distinguished by the reduced color pattern on its back. Two other character- istics which further differentiate it from A. boskianus are its short wide head and its sharply pectinate eyelids. The number of dorsal scales in A. opheod- urus varies from 29 to 36 while for the majority of A. boskianus arabian popu- lations it varies from 19 to 25. A. opheodurus is directly related to A. yemenicus and to A. felicis from southern Arabia. It seems these last two species represent isolated forms now differentiated in the southern part of the peninsula but once descended from a more general ancestor whom I have identified as A. opheodurus. The color pattern of A. opheodurus easily distinguishes it from these other two. The number of longitudinal rows of ventrals is the same for both A. opheodurus and A. yemenicus whereas A. felicis has two less. A. felicis can also be recog- nized by its granular, unkeeled temporal scales, its large scales on the lower eyelid, its number of dorsal scales ranging from 36 to 42 and its relatively long toes with only scarce Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Bonn, Zoologisches Forschungsinstitut und Museum Alexander Koenig
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