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Table 2 A list of main features of reported Petroxestes

From: The first report of terrestrial Petroxestes from the Lower Cretaceous Yixian Formation, western Liaoning, China

Location Ohio and Kentucky, USA Liaoning Province, China Anticosti Island, Canada Liège, Belgium Carriacou, Lesser Antilles
Gunpowder Greek Manchester Yixian county Sihetun village
Length (mm) 14.2–26.1 15.5–24.9 11–20 9–21 13.29–48.11 14 3.8
Width (mm) 2.9–4.7 2.5–4.4 2–4 1–3 3.01–6.62 4 1.4
W/L 0.21 0.18 0.13–0.25 0.1–0.23 0.05–0.3 0.29 0.37
Depth (mm) 1.7–11.0 4.5–20.1 1.5–3.0 1.5–3.0 < 14.53 3.0–3.5 0.5
Quantity Mass Mass Mass ~ 20 1 1
Formation Kope Formation Yixian Formation Jupiter Formation Maastricht Formation Grand Bay Formation
Series Upper Ordovician Lower Cretaceous Lower Silurian Upper Cretaceous Middle Miocene
Substrate Lithic substrates Lithic substrates Clathrodictyon stromatoporoids Hemipneustid echinoid Incomplete valve of Ostrea
Literature Pojeta and Palmer 1976; Wilson and Palmer 1988; Taylor and Wilson 2003; Wilson and Palmer 2006 This study Tapanila 2001; Tapanila and Copper 2002 Jagt et al. 2009 Pickerill et al. 2001