Note préliminaire sur la cytologie chromosomique comparée des Caméléons

Abstract

MATTHEY ET J. M. VAN BRINK Une telle formule caractérise des Iguanidae (AnoïisJ, des Agamidae (Agama, Uromastix), des Gerrhosauridae ( Gerrhosaurus ) , des Amphisbaenidae (Trogonophis). De cette formule, dérivent aisé-241-246.

On the Chromosomes of Four Species of Indian Snakes

“…From genetic standpoint the gross anatomical, karyological and biochemical aspects are related and interdependent in varying degrees, and it is likely that data from each of these will reveal valuable insight into the evolution of snakes. The chromosomes of reptiles have long been under discussion particularly in relation to the sex determining mechanism (Matthey and van Brink 1956). There occurs a uniform trend of sex determining mechanism in mammals (male heterogamety) and birds (female heterogamety), but in reptiles the situation is inconsistent i.e.…”

Lung-morphology in the Chamaeleonidae (Sauria) and its bearing upon phytogeny, systematics and zoogeography

“…The reason I want to do this is because his hypotheses are at variance with mine and this is, in my opinion, due to the fact that much of his argumentation is erroneous. Nevertheless his ideas have been quoted repeatedly if not uncritically in numerous papers, including my own (e. g. MATTHEY and BRINK 1960;BRYGOO 1971;BLANC 1972;BURRAGE 1973;KLAVER, op. cit.).…”

“…It requires only the assumption of an isolated position within the group as a whole, probably due to early branching. The union and hence the common ancestry of the species of the C. &tutus and the C. oweni group seems on the other hand less problematic and firmly established not only by lung morphological but also by karyological evidence (MAITHEY 1957;MATTHEY and BRINK 1960). Because of their lung structure C. werneri and allies, viz.…”

“…The discussion concerning the distribution of chameleons has centred around the questions whether East Africa or Madagascar had to be considered the centre of origin of the group and whether Madagascar had been populated from East Africa (by means of rafting or a landbridge) or vice versa (WERNER 1902a;METHUEN and HEW^ 1914;MAITHEY 1957;MATTHEY and BRINK 1960;HILLENIUS 1959HILLENIUS , 1963BRYGOO 1971;BLANC 1972). Remarkably, all explanations of the present distribution of chameleons were formulated without any reference to a phylogeny, i. e. without any hypothesis concerning monophyly and the relative age of the different species groups.…”

Sex Chromosomes in Amniota

“…Application of a modification of Makino and Nishimura's (1952) got, 1946) does not find any difference between the chromosome sets of the two sexes and concludes that there are no morphologically recognizable heterochromosomes in Chamaeleon vulgaris, Anguis fragilis, and Lacerta vivipara. The validity of this conclusion was further proved for Chamaeleon bitaeniatus, C. dilepis, Brookesia stumpfJi, and Lacerta vivipara in two recent papers by Matthey and van Brink (1956) by using the above mentionedsquash technique instead of the paraffin method which was used for the former studies.…”