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Anolbanolis
''Anolbanolis'' is an extinct genus of iguanian lizards that lived in the Bighorn Basin of what is now Wyoming during the earliest Eocene. The type species ''A. banalis'' was named by paleontologist Krister Smith in 2009 from a collection of isolated skull fragments found in a layer of the Willwood Formation that dates to a brief period of global warming called the Paleocene-Eocene thermal maximum (PETM) about 56 million years ago. The genus name ''Anolbanolis'' means "poor anole" from the Greek ''anolbos'' ("poor, wretched") and the name ''Anolis'', in reference to the scrappy nature of known fossil material and its close resemblance to lizards in the genus ''Anolis''. Smith suggested that ''Anolbanolis'' may be a close relative of ''Anolis'' or ''Polychrus'', which are common today in Central and South America but not found as far north as Wyoming, fitting with the idea that the Bighorn Basin was warmer and wetter in the Eocene than it is currently. According to Smith, the species name ''banalis'' is a reference to it being a "banal" lizard in the Willwood, being "quite abundant in the type locality," and not unusual because "the discovery of Eocene boreal fossil members of living subtropical and tropical clades is becoming commonplace." In 2011 Smith named a second species of ''Anolbanolis'', ''A. geminus'', which lived in the Bighorn Basin shortly after the PETM and was about 50 percent larger than ''A. banalis''. Smith concluded on the basis of features in ''A. geminus'' that ''Anolbanolis'' is more closely related to ''Anolis'' than it is to ''Polychrus''.
== References ==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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