Abstract
The “anomaly P” was described in Palearctic water frogs of the genus Pelophylax by Jean Rostand as complex morphological anomalies of water frogs, including polydactyly, brachymely, hind limb oedema, bone outgrowths, spikes, flexions and additional limbs in the inguinal region. In 2016, the anomaly P syndrome was rediscovered in central Russia, confirming the hypothesis concerning its wider distribution. Here, three new records of this syndrome in two species of western Palearctic water frog from Russia are described.
Highlights
In the 1950s, the famous French writer and biologist Jean Rostand discovered morphological anomalies of an unknown etiology in water frogs of the genus Pelophylax, which he named “the anomaly P” (Rostand 1971)
The anomaly P syndrome refers to morphological anomalies of water frogs that have light and severe forms of manifestation
Specimens suffering from severe forms of the anomaly have brachymely, polydactyly, hind limb oedema, bone outgrowths, spikes, flexions and additional limbs in the inguinal region (Dubois 2017)
Summary
In the 1950s, the famous French writer and biologist Jean Rostand discovered morphological anomalies of an unknown etiology in water frogs of the genus Pelophylax, which he named “the anomaly P” (Rostand 1971). Specimens suffering from severe forms of the anomaly have brachymely, polydactyly, hind limb oedema, bone outgrowths, spikes, flexions and additional limbs in the inguinal region (Dubois 2017). Water frogs with the anomaly were found in Ostrovtsovskaya Lesosteppe, Privolzhskaya Lesosteppe Nature Reserve, Penza Region, Russia.
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