...Steven J. Hageman; Olev Vinn Abstract The phylum Bryozoa had long been the only major phylum unknown from the Cambrian and by inference the Cambrian Explosion of biodiversity. When described in 2010 as a late Cambrian cryptostome bryozoan, Pywackia baileyi Landing in Landing et al., 2010 became...

... Figure 2 Zooaria of the bryozoan Pywackia baileyi from the late Cambrian lower Yudachica Member of the Tiñu Formation, section near Río Salinas, Oaxaca State, Mexico. Specimens from sample Tu-4.95 (Landing et al., 2007a, Table 1); scale bars 0.2 mm long...

...Ed Landing; Jonathan B. Antcliffe; Martin D. Brasier; Adam B. English Abstract Bryozoans and all biomineralized metazoan phyla extend back into the Cambrian. Pywackia Landing, 2010 is confirmed as a secondarily phosphatized, late Cambrian stenolaemate bryozoan with colonial habit; mineralized...

...Paul D. Taylor; Björn Berning; Mark A. Wilson A bstract Pywackia baileyi Landing in Landing et al., 2010 , from the upper Cambrian Yudachica Member of Oaxaca State, southern Mexico, consists of small, phosphatic, proximally tapering cylindrical rods covered by shallow polygonal calices...

...Ed Landing; Adam English; John D. Keppie Abstract Exquisite Pywackia baileyi Landing n. gen. and sp. specimens from the lower Tiñu Formation, southern Mexico, extend the bryozoan record into the Upper Cambrian. They are ∼8 m.y. older than the purported oldest bryozoans from South China, and show...