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Some authors have suggested that Tianzhenosaurus is actually a junior synonym of Saichania chulsanensis, but this matter remains unresolved, and Vickaryous et al. (2004) placed it within the Ankylosauridae, nested as the sister group to Pinacosaurus.
The gnepine hypothesis is a modification of the gnetifer hypothesis, and suggests that the gnetophytes belong within the conifers as a sister group to the Pinaceae.
The AKB48 sister group JKT48 announced the release of "Manatsu no Sounds Good! - Musim Panas Sounds Good!", an Indonesian version of "Manatsu no Sounds Good!", as its fourth single for November 26, 2013.
The new family could represent the sister group of the Micropterigidae.
It is divided into two sub-genera: the sub-genus Castaneophyllum J.-F. Leroy, 1982, with elliptical, penninerved leaves with small scarious, stipules, that only includes Platanus kerrii Gagnep., 1939, an isolated relict species that represents the genus’ evolutionary basal branch and which is a sister genus and is the sister group of the other species, including the sub-genus Platanus.