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. 2016 Aug 9;17:597. doi: 10.1186/s12864-016-2986-6

Fig. 1.

Fig. 1

Simplified phylogeny of some gonochoric and hermaphroditic unionoid bivalves redrawn after Breton et al. [16]. The presence of DUI (Doubly Uniparental Inheritance) with F- and M-type mtDNAs in gonochoric species is indicated in black, whereas hermaphroditism with SMI (Strict Maternal Inheritance) is indicated in red. Species in black have F-ORFs containing one predicted transmembrane (TM) helix in their N-terminal portion, whereas hermaphroditic species have macromutated H-ORFs with repeat units and sometimes more than one predicted TM helix [16]