¿Qué es un Pseudoarilo?

¿Qué es un pseudoarilo?

Este?

https://www.researchgate.net/publication/312237197_Extraccion_y_morfologia_del_embrion_de_Bursera_bipinnata_Burseraceae/figures?lo=1

By the context of this research abstract, pseudoalyl appear to be a structure within the seed/embryo of the genera Bursera and Commiphora of the Burseraceae - frankincense and myrrh family. Can anyone elaborate on the function of this structure?