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Figure 6 | BMC Evolutionary Biology

Figure 6

From: Arthroaspisn. gen., a common element of the Sirius Passet Lagerstätte (Cambrian, North Greenland), sheds light on trilobite ancestry

Figure 6

Pygidium and posterior thorax of Arthroaspis bergstroemi n. gen. n. sp. A. MGUH 30401, pygidium with posterior trunk tergites showing axial rings and segmental marginal spines of pygidium (dorsal aspect); B. MGUH 30418, pygidium with posterior trunk tergites showing axial rings, segmental marginal spines, and anterior segment of pygidium (dorsal aspect); C. MGUH 30386, disarticulated pygidium with appendages (dorsal aspect); D. MGUH 30393, anterior margin of disarticulated pygidium showing anterior segment of pygidium with articulating flanges (dorsal aspect, light from SE).

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