Four additional specimens of the fossil camel spider Cratosolpuga wunderlichi Selden 1996 (Arachnida: Solifugae) from the Lower Cretaceous Crato Formation of Brazil - 2004
A new genus and subfamily of scorpions from Lower Cretaceous Burmese amber (Scorpiones: Chaerilidae) - 2004
A redescription and family placement of Uintascorpio Perry, 1995 from the Parachute Creek Member of the Green River Formation (Middle Eocene) of Colorado, USA (Scorpiones: Buthidae) - 2004
A new fossil whip spider (Arachnida: Amblypygi) from the Crato Formation of Brazil - 2005
A new fossil Episinus (Araneae, Theridiidae) from Tertiary Chiapas amber, Mexico - 2006
A fossil tarantula (Araneae: Theraphosidae) from Miocene Chiapas amber, Mexico - 2008
Primer registro fósil del género Hemirraghus (Araneae, Theraphosidae) en ámbar del Terciario, Chiapas, México - 2008