Richard Owen had expertise in comparative anatomy and his professional judgements revealed a succession of similar species in the same locality, giving Darwin insights which he would later recall as being central to his new views.
Richard Owen era expert în anatomie comparată iar judecățile informate emise de el au relevat o succesiune de specii similare în aceleași zone, dându-i lui Darwin informații de care ulterior își va aduce aminte ca fiind centrale pentru noile sale vederi.