Phylum Ascomycota Caval.-Sm. (1998) - sac fungi
Subphylum Pezizomycotina O.E. Erikss. & Winka (1997)
Class Sordariomycetes O.E. Erikss. & Winka (1997)
Subclass Xylariomycetidae O.E. Erikss. & Winka (1997)
Order Xylariales Nannf. (1932)
01 Family Barrmaeliaceae Voglmayr & Jaklitsch (2017)
02 Family Castanediellaceae Hern.-Restr., Guarro & Crous (2017) [monotypic]
03 Family Diatrypaceae Nitschke (1869)
04 Family Graphostromataceae M.E.Barr, J.D. Rogers & Y.M. Ju (1993)
05 Family Hypoxylaceae DC. (1805)
06 Family Lopadostomataceae Daranag. & K.D.Hyde (2015)
07 Family Microdochiaceae Hern.-Restr., Crous & J.Z. Groenew. (2016)
08 Family Myelospermataceae K.D.Hyde & S.W. Wong (1999) [monotypic]
09 Family Polystigmataceae Höhn. ex Nannf. (1932) [monotypic]
10 Family Requienellaceae Boise (1986)
11 Family Xylariaceae Tul. & C.Tul. (1861)
12 Family Zygosporiaceae J.F. Li, Phookamsak & K.D.Hyde (2017) [monotypic]
13 Genus Adomia S. Schatz (1985), incertae sedis
14 Genus Anungitea B.Sutton (1973), incertae sedis
15 Genus Ascotrichella Valldos. & Guarro (1988), incertae sedis
16 Genus Biporispora J.D. Rogers, Y.M. Ju & Cand. (1999), incertae sedis
17 Genus Castellaniomyces Senan., Camporesi & K.D.Hyde (2017), incertae sedis
18 Genus Chaenocarpus Rebent. (1804), nom. dub., incertae sedis
19 Genus Circinotrichum Nees (1816), incertae sedis
20 Genus Cryptostroma P.H. Greg. & S. Waller (1952), incertae sedis
21 Genus Cyanopulvis J. Fröhl. & K.D.Hyde (2000), incertae sedis
22 Genus Diamantinia A.N. Mill., Læssøe & Huhndorf (2003), incertae sedis
23 Genus Durotheca Læssøe, Srikit., Luangsa-ard & M. Stadler (2013), incertae sedis
24 Genus Guestia G.J.D.Sm. & K.D.Hyde (2001), incertae sedis
25 Genus Hadrotrichum Fuckel (1865), incertae sedis
26 Genus Idriellopsis Hern.-Restr. & Crous (2016), incertae sedis
27 Genus Kirstenboschia Quaedvl., Verkley & Crous (2013), incertae sedis
28 Genus Lanceispora Nakagiri, Okane, Tad. Ito & Katum. (1997), incertae sedis
29 Genus Lasiobertia Sivan. (1978), incertae sedis
30 Genus Leiosphaerella Höhn. (1919), incertae sedis
31 Genus Leptomassaria Petr. (1914), incertae sedis
32 Genus Neoidriella Hern.-Restr. & Crous (2015), incertae sedis
33 Genus Occultitheca J.D. Rogers & Y.M. Ju (2003), incertae sedis
34 Genus Ophiorosellinia J.D. Rogers, A. Hidalgo, F.A. Fernández & Huhndorf (2004), incertae sedis
35 Genus Palmicola K.D.Hyde (1993), incertae sedis
36 Genus Pandanicola K.D.Hyde (1994), incertae sedis
37 Genus Paraidriella Hern.-Restr. & Crous (2015), incertae sedis
38 Genus Paramphisphaeria F.A. Fernández, J.D. Rogers, Y.M. Ju, Huhndorf & Umaña (2004), incertae sedis
39 Genus Paucithecium Lloyd (1923), incertae sedis
40 Genus Pidoplitchkoviella Kiril. (1975), incertae sedis
41 Genus Polyancora Voglmayr & Yule (2006), incertae sedis
42 Genus Polyscytalum Riess (1853), incertae sedis
43 Genus Poroleprieuria M.C. González, Hanlin, Ulloa & Elv. Aguirre (2004), incertae sedis
44 Genus Pseudophloeospora Crous & R.G. Shivas (2010), incertae sedis
45 Genus Pulmosphaeria Joanne E. Taylor, K.D.Hyde & E.B.G.Jones (1996), incertae sedis
46 Genus Pyriformiascoma Daranag., Camporesi & K.D.Hyde (2015), incertae sedis
47 Genus Sporidesmina Subram. & Bhat (1989), incertae sedis
48 Genus Striatodecospora D.Q. Zhou, K.D.Hyde & B.S. Lu (2000), incertae sedis
49 Genus Stromatoneurospora S.C. Jong & E.E. Davis (1973), incertae sedis
50 Genus Surculiseries Okane, Nakagiri & Tad. Ito (2001), incertae sedis
51 Genus Synnemadiella Crous & M.J. Wingf. (2016), incertae sedis
52 Genus Synnemapestaloides T. Handa & Y.Harada (2004), incertae sedis
53 Genus Tristratiperidium Daranag., Camporesi & K.D.Hyde (2015), incertae sedis
54 Genus Xyladictyochaeta Hern.-Restr., R.F.Castañeda & Gené (2017), incertae sedis
55 Genus Xylocrea Möller (1901), incertae sedis
56 Genus Yuea O.E. Erikss. (2003), incertae sedis