Praecambridium sigillum is an extinct organism that superficially resembles a segmented trilobite-like arthropod.[1] It was originally described as being a trilobite-like arthropod, though the majority of experts now place it within the Proarticulata as a close relative of the much larger Yorgia.[2][3] It is from the Late Ediacaran deposit of Ediacara Hills, Australia, about 555 million years ago. On average, P. sigillum had at least 5 pairs of segments, with each unit becoming progressively larger as they approach the cephalon-like head.
^Glaessner, M.F.; Wade, M. (1971). "Praecambridium – a primitive arthropoda". Lethaia. 4 (1): 71–77. doi:10.1111/j.1502-3931.1971.tb01280.x.
Praecambridium sigillum is an extinct organism that superficially resembles a segmented trilobite-like arthropod. It was originally described as being...
Fedonkin in 1985 for such animals as Dickinsonia, Vendia, Cephalonega, Praecambridium and currently many other Proarticulata are described (see list). Due...
†Marywadea †Cyanorus †Praecambridium, sometimes included into Yorgiidae. Spriggina floundersi Cyanorus singularis Praecambridium sigillum Cephalozoa Yorgiidae...
2004 † Praecambridium Glaessner and Wade, 1966, previously classified as Yorgiidae; now considered a juvenile form of Spriggina † Praecambridium sigillum...
closest relative, separated from Dickinsonia and closer to Yorgia, Praecambridium, Archaeaspinus and Vendia, since all of them are sharing a dextrally...
is probably a member of Proarticulata, as it is strongly similar to Praecambridium sigillum in the general shape, and the presence of hooklike isomers;...
Fedonkin as a problematic organism, being grouped together with Vendia, Praecambridium and Vendomia as possible stem-group arthropods due to a vague similarity...
Ukraine Pomoria Fedonkin 1980 junior synonym of Tribrachidium Russia Praecambridium Glaessner et Wade 1966 Proarticulata Australia Primocandelabrum Hofmann...
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