2 GEOLOGICAL Setting
Neither Parker ainsi que al. ( 2005 ) neither Seem mais aussi al. ( 2005 ) attempted a good phylogenetic studies off Roentgen. callenderi according to research by the the brand new skeletal matter. However, one another organizations listed several options that come with brand new hindlimb that were unambiguous synapomorphies out-of Pseudosuchia. Parker et al. ( 2005 ) hypothesized a possible aunt-class relationship with aetosaurs, noting the newest morphological similarities of your squamosal and you will paramedian osteoderms. An equivalent standing is actually suggested by Search mais aussi al. ( 2005 ) centered on unspecified character says of tarsus and also the osteoderms. Brusatte mais aussi al. ( 2010 ) provided Roentgen. callenderi within investigation from early archosaur relationships, coding on authored data and meanings off Parker ainsi que al. http://www.datingranking.net/tr/connexion-inceleme ( 2005 ) and you may Appear mais aussi al. ( 2005 ). You to definitely study retrieved R. callenderi while the sibling taxon into the very early-diverging suchian clade Ornithosuchidae. ( 2011 ) recovered Roentgen. callenderi in a highly-served status just like the brother taxon so you can aetosaurs, an end result supported by more recent education (elizabeth.g., Butler mais aussi al., 2014 ; ; Nesbitt & Butler, 2013 ; Nesbitt et al., 2014 ; Nesbitt mais aussi al., 2020 ; Nesbitt, Stocker, ainsi que al., 2018 ).