Xyalidae

Xyalidae is a family of nematodes belonging to the order Monhysterida.

Genera
Genera:
 * Ammotheristus Lorenzen, 1977
 * Amphimonhystera Timm, 1961
 * Amphimonhystrella Timm, 1961
 * Arabanema Turpeenniemi, Nasira & Maqbool, 2001
 * Austronema Cobb, 1914
 * Buccolaimus Allgén, 1959
 * Capsula Bussau, 1993
 * Cenolaimus Cobb, 1933
 * Cienfuegia Armenteros, Vincx & Decraemer, 2009
 * Cobbia de Man, 1907
 * Corononema Nicholas & Stewart, 1995
 * Dactylaimoides Blome, 2002
 * Dactylaimus Cobb, 1920
 * Daptonema Cobb, 1920
 * Echinotheristus Thun & Riemann, 1967
 * Elzalia Gerlach, 1957
 * Enchonema Bussau, 1993
 * Filipjeva Ditlevsen, 1928
 * Gnomoxyala Lorenzen, 1977
 * Gonionchus Cobb, 1920
 * Guitartia Armenteros, 2010
 * Gullanema Nicholas & Stewart, 1995
 * Hofmaenneria Gerlach & Meyl, 1957
 * Hofmaenneria Gerlach & Meyl, 1957
 * Lamyronema Leduc, 2015
 * Linhystera Juario, 1974
 * Litotes Cobb, 1920
 * Longilaimus Allgén, 1958
 * Manganonema Bussau, 1993
 * Marisalbinema Tchesunov, 1990
 * Metadesmolaimus Schuurmans Stekhoven, 1935
 * Omicronema Cobb, 1920
 * Paradaptonema Gagarin, 2020
 * Paragnomoxyala Jiang & Huang, 2015
 * Paragonionchus Blome, 2002
 * Paramonohystera Steiner, 1916
 * Paramphimonhystrella Huang & Zhang, 2006
 * Parelzalia Tchesunov, 1990
 * Penzencia De Man
 * Promonhystera Wieser, 1956
 * Prorhynchonema Gourbault, 1982
 * Pseudechinotheristus Blome, 2002
 * Pseudelzalia Yu & Xu, 2015
 * Pseudosteineria Wieser, 1956
 * Pulchranemella N.Cobb, 1933
 * Retrotheristus Lorenzen, 1977
 * Rhynchonema Cobb, 1920
 * Robustnema Nicholas, 1996
 * Sacrimarinema Shoshin, 2001
 * Scaptrella Cobb, 1917
 * Sphaerotheristus Timm, 1968
 * Spiramphinema Wieser, 1956
 * Steineria Micoletzky, 1922
 * Stylotheristus Lorenzen, 1977
 * Theristus Bastian, 1865
 * Theristus Bastian, 1865
 * Valvaelaimus Lorenzen, 1977
 * Wieserius Chitwood & Murphy, 1964
 * Xenolaimus Cobb, 1920
 * Xyala Cobb, 1920
 * Zygonemella Cobb, 1920