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Figure 3 | BMC Evolutionary Biology

Figure 3

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

Figure 3

Tergite articulations of Arthroaspis bergstroemi n. gen. n. sp. A. MGUH 30400, specimen with cephalon and two articulated thoracic segments; A 1 (dorsal aspect); A 2 (ventral aspect); B. MGUH 30407 (pt), specimen with tergites tilted relative to each other, indicating tergite articulations interconnecting tergites along their entire width. Inner lamella is preserved (dorsal aspect); C. MGUH 30390 articulated thoracic tergites and appendages, tergites partially disarticulated (dorsal aspect); D. MGUH 30402 two adjacent tergites articulated at the half-rings only (ventral aspect); E. MGUH 30389, lateral gape of adjacent tergites, with narrow marginal rim on tergites and displaced distal lobe of exopod (dorsal aspect).

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