- Xya pfaendleri Harz, 1970
Holotype; female; 87ac043f-420f-4c46-879c-376096271a0e; deposited at: Naturhistorisches Museum, Wien (NMW); Austria: Burgenland: E banks of Lake Neusiedl
- Xya palaestinae Harz, 1971: 342.
Holotype; male; 6ec77372-b045-4524-a5c6-d998d3f6247c; deposited at: Naturhistorisches Museum, Wien (NMW); Palestine: Khudeira near Haifa
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- Tridactylus pfaendleri (Harz, 1970) in Harz, 1975: 58.
- Tridactylus musicus Harz, 1978 (homonym)
Holotype; male; 2a0d431f-8e01-46f4-b640-80646bd82940; deposited at: Museum d'Histoire Naturelle, Geneva, Switzerland (MHNG); Jordan: Aqaba: Wadi Musa
- Tridactylus musicus Harz, 1978 in Harz, 1979
- Tridactylus musicus Harz, 1978 in Harz, 1979
- Tridactylus indistinctus Harz, 1979: 115.
- Tridactylus musicus Harz, 1978 (synonym of Tridactylus indistinctus Harz, 1979) in Harz, 1979: 115.
- Xya pfaendleri pfaendleri Harz, 1970 in Harz, 1979: 145.
- Tridactylus indistinctus Harz, 1979 (synonym of Xya pfaendleri Harz, 1970) in Harz, 1979: 145.
- Tridactylus musicus Harz, 1978 (subjective synonym of Xya pfaendleri Harz, 1970) in Harz, 1979
- Tridactylus indistinctus Harz, 1979 (nomen novum for Tridactylus musicus Harz, 1978)
- Xya palaestinae Harz, 1971 in Günther, 1980: 120.
- Xya pfaendleri Harz, 1970 in Günther, 1980: 170.
- Tridactylus indistinctus Harz, 1979 (synonym of Xya pfaendleri Harz, 1970) in Günther, 1980
- Tridactylus pfaendleri (Harz, 1970) in Herrera, 1982: 53.
- Xya palaestinae Harz, 1971 in Cejchan, 1987: 396.
- Xya pfaendleri Harz, 1970 in Günther, 1990: 131.
- Xya palaestinae Harz, 1971 (subjective synonym of Xya pfaendleri Harz, 1970) in Günther, 1990: 120.
- Xya pfaendleri Harz, 1970 in Bellmann & Luquet, 1995: 188.
- Tridactylus indistinctus Harz, 1979 (synonym of Xya pfaendleri Harz, 1970) in Heller, 1998: 7, 9.
- Tridactylus musicus Harz, 1978 (subjective synonym of Xya pfaendleri Harz, 1970) in Heller, 1998: 7, 9.
- Xya pfaendleri Harz, 1970 in Zechner, Hausl-Hofstätter & Paill, 1999
- Xya pfaendleri Harz, 1970 in Defaut, 1999: 29.
- Xya pfaendleri Harz, 1970 in Defaut, 2001: 38.
- Xya pfaendleri Harz, 1970 in Fontana, Buzzetti, Cogo & Odé, 2002
- Tridactylus pfaendleri (Harz, 1970) in Voisin, 2003: 51.
- Xya pfaendleri Harz, 1970 in Zechner, Koschuh, Berg, Paill, Reinbacher & Zuna-Kratky, 2005: 142.
- Xya pfaendleri Harz, 1970 in Nagy, 2005: 19.
- Xya pfaendleri Harz, 1970 in Ünal, 2006: 20.
- Xya pfaendleri Harz, 1970 in Pushkar & Storozhenko, 2011
- Xya pfaendleri Harz, 1970 in Szövényi & Puskás, 2012: 410.
- Xya pfaendleri pfaendleri Harz, 1970 in Pavićević, Ivković & Horvat, 2014: 115-116.
- Xya pfaendleri Harz, 1970 in Holusa, 2014
- Xya pfaendleri Harz, 1970 in Lehmann & Monnerat, 2014: 46.
- Xya palaestinae Harz, 1971 (subjective synonym of Xya pfaendleri Harz, 1970) in Lehmann & Monnerat, 2014: 46.
- Xya pfaendleri Harz, 1970 in Hollier & Bruckner, 2015: 196.
- Tridactylus indistinctus Harz, 1979 (synonym of Xya pfaendleri Harz, 1970) in Hollier & Bruckner, 2015: 191.
- Tridactylus musicus Harz, 1978 (subjective synonym of Xya pfaendleri Harz, 1970) in Hollier & Bruckner, 2015: 195.
- Xya palaestinae Harz, 1971 (subjective synonym of Xya pfaendleri Harz, 1970) in Hollier & Bruckner, 2015: 196.
- Xya pfaendleri pfaendleri Harz, 1970 in Lemonnier-Darcemont, Puskás & Darcemont, 2015
- Xya pfaendleri pfaendleri Harz, 1970 in Defaut & Morichon, 2015: 69.
- Xya pfaendleri Harz, 1970 in Alexiou, 2017: 59.
- Xya pfaendleri Harz, 1970 in Willemse, Kleukers & Odé, 2018: 344.