O. G. Dely szerk.: Vertebrata Hungarica 21. (Budapest, 1982)

Daravskii, I. S. ; Kupriyanova, L. A.: Rare males in parthenogenetic lizard Lacerta armeniaca Méhely 69-76. o.

Lacert

a

, as well as the absence of definite information on the degree of their fertility make it difficult to clarify the role of these occasional males in the evolution of parthenogenetic species. With the full fertility of such males,, it would be reasonable to expect the appearance of fertile triploid hybrids resulting from their mating with females of their own species. However, no such triploids have been found so far. It is worth mentioning, however, that in the collection of the Zoological Institute of the USSR Academy of Sciences, among the rock lizards there are two apparently hybrid females (L

. armeniac

a x L. dahli

) whose mechanism of appearance still remains obscure and urgently needs further examination. The authors are grateful to G.V. SELIVANOVA for her kind assistance in the cytophotometrical analysis. REFERENCES BHATNAGAR, A.N. & YONISS, Y. Th. (1976): A proof of female heterogamety in a lacertid lizard, Ophisops elegáns. - Cytologia, 41; 507-511. BULL. J. (1978): Sex chromosome differentiation: an intermediate stage in a lizard. - Can.J. Genet.Cytol., 20: 205-209. CHRISTIANSEN, J. L. (1971): Reproduction of Cnemidophorus inornatus and Cnemidophorus neomexicanus (Sauria, Teiidae) in Northern New Mexico. - Am.

Mus.Novit., 244

2

: 1-48. CIMINO, M.C. (1972): Egg-product! on, polyploidization and evolution in a diploid all-female fish of the genus Poeciliopsis. - Evolution, Lancaster, Pa., 26: 294-306. COLE C. (1979): Chromosome inheritance in parthenogenetic lizards and evolution of allopolyploidy in reptiles. - Heredity, Lond., 70: 95-102. COLE, C., LOWE, C. & WRIGHT, J. (1969): Sex chromosomes in teiid whiptail lizards (genus Cnemidophorus). - Amer .Mus. Novit.

, 239

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: 1-14. CUELLAR, O. (1971): Reproduction and the mechanism of meiotic restitution in the parthenogenetic lizard. Cnemidophorus uniparens. - J.Morph., 13

3

: 139-165. CUELLAR, O.&MCKINNEY, C. (1976): Natural hybridization between parthenogenetic and bisexual lizards: detection of uniparental source by skin grafting. - J.exp.Zool., 19

6

: 341-350. DAREVSKY, I.S. (1966): Natural parthenogenesis in a polymorphic group of Caucasian rock lizards related to Lacerta saxicola Eversmann. - J.Ohio herpet.Soc., 5: 114-152. DAREVSKY, I.S. & KULIKOVA, V.N. (1964): Natural triploidy in polymorphic group of Caucasian rock lizards (Lacerta saxicola Eversmann) as a result of hybridization of bisexual with parthenogenetic forms of these species. - Doklady Akad.Nauk SSSR, 15

8

: 202-205 (in Russian), DAREVSKY, I.S., UZZELL, T.M., KUPRIJANOVA, L.A. & DANIELJAN, F.D. (1973): Triploid hybrid males in sympatric populations of some parthenogenetic and bisexual species of rock lizards of the genus Lacerta. - Bull.Moscow Soc.Nat., _78: 48-58 (in Russian). DAREVSKY, I.S., KUPRIYANOVA, L.A. & BAKRADZE, M.A. (1978): Occasional males and intersexes in parthenogenetic species of Caucasian rock lizards (genus Lacerta). - Copeia, 2: 201-207. DOBROWOLSKA, N. (1964): A case of an adult male appearance in the population of the parthenogenetic subspecies Lacerta saxicola dahli Darewskij from Armenia area. - Zoologica Pol, , 14: 9-13. ENGEL, W. & WENIGER, J.P. (1979): Appearance of H-W (H-Y) antigen in the gonads of oestrodiol sex-reversed male chicken embryons. - Nature, Lond,, 28

0

, 5718: 142-144, FREDGA, K., GROPP, A. & WINKING, H. (1980): The incredible Myopus. - Clin.Genet., _17: 66. GORMAN, G. (1969): New chromosome data for 12 species of Lacertid Lizards. - J.Herpetol., 3: 49-53. HERBST, E.W.', FREDGA, K., FRANK, F., WINKING, H. & GROPP, A. (1978): Cytological identification of two X-chromosome types in the wood lemming (Myopus schisticolor). Chromosoma, 69: 185-191. IVANOV, V.G. (1973): Sex chromosomes of three species lizards of USSR fauna. - Voprosy Gerpetologii, Leningrad: 84-86 (in Russian). IVANOV, V.G, & FEDOROVA, T.A. (1970): Sex heteromorphism of chromosomes in Lacerta strigata Elchwald. - Tsitologiya, 12: 1582-1585 (In Russian). KUPRIJANOVA, L.A. (1973): Karyological analysis of some hybrid forms between parthenogenetic and bisexual species of rock lizards. - Voprosy Gerpetologii, Leningrad: 112-113 (in Russian). LANTZ, L.A. (1923): Hermaphrodit!sine partiel chez Lacerta saxicola. - Bull.Soc.zool.Fr., 48:289290.