- Utility of the nuclear protein-coding gene, elongation factor-1 gamma (EF-1gamma), for spider systematics, emphasizing family level relationships of tarantulas and their kin (Araneae: Mygalomorphae). Ayoub, N.A., Garb, J.E., Hedin, M., Hayashi, C.Y. Mol. Phylogenet. Evol. (2007)