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On pileus anomalies in the common lizard Lacerta vivipara in Finland — a morphogenetic problem revisited

Paavo Voipio
Annales Zoologici Fennici
Vol. 28, No. 2 (1991), pp. 83-94
Stable URL: http://www.jstor.org/stable/23734566
Page Count: 12
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
On pileus anomalies in the common lizard Lacerta vivipara in Finland — a morphogenetic problem revisited
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Abstract

The anterior and posterior pileus in 367 specimens of the common lizard Lacerta vivipara, collected mainly in southern Finland, show different types of variation: geographical in the anterior and largely stochastic in the posterior. This variation was studied in terms of phenodeviants indicatory of disturbances caused by environmental or genetic stresses during ontogeny, with the following results: 1) the differences in the anterior pileus pattern are probably hereditary, 2) the viabilities of the pileus types vary in different environmental conditions, 3) the postfrontal anomalies are much more common among individuals with a particular pattern called "rectangular" than among the other types, the former thus possibly being connected with some specific system of disturbance particularly susceptible to anomalies, and 4) it seems evident that there are genetically determined interrelations between the anterior and posterior part of the pileus through the mediatory role of the rectangular pattern. The problem is treated in terms of phenodeviants indicating disturbances caused by environmental or genetic stresses during ontogeny.

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