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. 2017 Sep 18;114(40):E8382–E8391. doi: 10.1073/pnas.1712857114

Fig. 2.

Fig. 2.

Weevils and their Nardonella genomes examined in this study. (A) Nardonella Rfe of the red palm weevil R. ferrugineus (Curculionidae: Dryophthorinae). (B) Nardonella Sgi of the giant weevil S. gigas (Curculionidae: Dryophthorinae). (C) Nardonella Epo of the West Indian sweet potato weevil E. postfasciatus (Curculionidae: Cryptorhynchinae). (D) Nardonella Pin of the black hard weevil P. infernalis (Curculionidae: Entiminae). Nardonella Sgi has a 2,117-bp plasmid encoding only two genes, mscS and ibpA-like. mscS, which is retained in all of the Nardonella genomes, encodes a channel for osmoregulation that exports water and ions upon hypotonic conditions (77). ibpA, which is found in Nardonella Epo but absent in Nardonella Rfe and Nardonella Pin, encodes a small chaperone Hsp20 (78). Note that the synteny of mscS and ibpA on the plasmid of Nardonella Sgi is conserved on the chromosome of Nardonella Epo.