In frog, the vertebra with an anterior convex surface (i.e., double convexties) is
atlas
urostyle
8th vertebra
9th vertebra
The first phylogenetic system of plant classification was proposed by
Engler
Engler and Prantl
Eichler
Wetlstein
C.
Eichler
The first phylogenetic system was proposed by Eichler who is famous for his work entitled "Bluthen Diagramme" published in two volumes.