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Principios de Taxonomia

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XXXIIj Color Plates<br />

Color Plate 8. Water Frogs are Kleptospecies<br />

(photomontage)<br />

The Water Frog Pelophylax esculenta (top and<br />

center) is a hybrid species between the Marsh<br />

Frog P. ridibunda (bottom right) and the Pool<br />

Frog P. lessonae (bottom left; photo: Benny<br />

Trapp). Whereas the somatic cells of the Water<br />

Frog contain the genomes of both parental<br />

species, one of the genomes is completely<br />

eliminated in the germinal cell line in the Water<br />

Frog prior to meiosis. As a consequence, the<br />

genes of one of the two parental species cannot<br />

be passed on to further generations. Therefore,<br />

the Water Frog steals one of its genomes from<br />

a foreign species and is termed a<br />

kleptospecies for this reason.

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