. Bonner zoologische Beiträge : Herausgeber: Zoologisches Forschungsinstitut und Museum Alexander Koenig, Bonn. Biology; Zoology. q V 1 <f Arguineguln BMNH A B C Fig. 27: Anal region of (a) Gallotia stehlini (b) Gallotia simonyi and (c) Gallotia aff. simony i. The temporal region in the Lizard of Salmor has few but large plates, an average number of (min. 33 and max. 39) while the Hierro Giant lizard shows a clearly differentiated large massetericum ( + 1) and many smaller plates, an average number of (min. 54 and max. 66). According to Boulenger (1920) stehlini temporal
. Bonner zoologische Beiträge : Herausgeber: Zoologisches Forschungsinstitut und Museum Alexander Koenig, Bonn. Biology; Zoology. q V 1 <f Arguineguln BMNH A B C Fig. 27: Anal region of (a) Gallotia stehlini (b) Gallotia simonyi and (c) Gallotia aff. simony i. The temporal region in the Lizard of Salmor has few but large plates, an average number of (min. 33 and max. 39) while the Hierro Giant lizard shows a clearly differentiated large massetericum ( + 1) and many smaller plates, an average number of (min. 54 and max. 66). According to Boulenger (1920) stehlini temporal scutellation varies between 75 and 110. In the former, the preanal plate is bordered by the three semicircles of small scales, the first of which has 7 (one BMNH specimen has only six, but still small). The preanal region of the latter is different (see fig. 27), showing larger and fewer plates. The preanal is not so differentiated in size from the other plates, of which only 5 are in touch with the preanal in the six specimens studied. In 33 individuals of Gallotia stehlini inspected by Mr. López Jurado, the average number is , varying between 6 and 7, as in simonyi. Peters (1961) gives a high taxonomical value to the anal region and Arnold (1973) says that there is some tendency for the larger species and those from arid regions to have higher numbers of scales. When I first saw the Hierro Giant lizard in nature, I thought immediately of a different animal, a separate species from the Gran Canaria Giant lizard. Taxonomists were still discussing two independent lines, or a single polytypic species: Gallotia simonyi simonyi and Gallotia simonyi stehlini. Only now, I realize that my first impressions were probably right, but with different consequences. In the four papers I have prepared simultaneously for this occasion, I have preferably used the following common names that avoid misunderstanding: the Gran Canaria Giant lizard, the Lizard of Salmor, and the Hierro Giant l
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