title: Types of supernumerary outgrowths produced after inverting the dorsoventral limb axis of the anuranBufo bufo.
abstract: Contralateral grafts were performed on the larval limb buds of the anuranBufo bufo. The dorsoventral axis of 80 buds at stages IV or V was inverted. Ten tadpoles were used as controls. Fifty-two supernumerary structures developed, all of them in dorsal or ventral locations on the host stump. The majority (32 out of the 44 outgrowths with more than 3 toes) were normal limbs of stump handedness. However, the following abnormal structures were also observed: 2 double-posterior, 3 mixed-symmetric, and 7 undetermined cases. These results are in agreement with the predictions of a hierarchical polar coordinate model for epimorphic regeneration.
authors.affiliation: Zoological Laboratory, University of Athens, Panepistimiopolis, GR-15784, Athens, Greece.
authors.forename: P
authors.initials: P
authors.lastname: Costaridis
authors.affiliation: N.R.C. "Demokritos", Aghia Paraskevi, Athens, Greece.
authors.forename: S
authors.initials: S
authors.lastname: Papageorgiou
authors.affiliation: Zoological Laboratory, University of Athens, Panepistimiopolis, GR-15784, Athens, Greece.
authors.forename: V
authors.initials: V
authors.lastname: Kiortsis
authors.affiliation: Zoological Laboratory, University of Athens, Panepistimiopolis, GR-15784, Athens, Greece.
authors.forename: C
authors.initials: C
authors.lastname: Zafeiratos
keywords: Anuran; Bufo bufo; Dorsoventral limb axis; Supernumerary outgrowths