Fig. 2. Mickwitzia occidens Walcott. A. Ventral valve MGUH 26294 in The Early Cambrian (Botomian) stem group brachiopod Mickwitzia from Northeast Greenland

Fig. 2. Mickwitzia occidens Walcott. A. Ventral valve MGUH 26294, lateral view of exterior; scale bar 500 µm. B. Ventral valve MGUH 26295, detail of exfoliated exterior with large tube and cocci; scale bar 20 µm. All specimens from the middle member of the Poleta Formation in Indian Springs Canyon, northern Montezuma Range, Esmeralda County, Nevada.