• Phylogenetic placement: Passeri: Passerides: Sylviida: Aegithaloidea
• Distribution: Eurasia, Africa, Wallacea, Oceania
• Number of extant genera: 9
• Number of extant species: 32

Traditional genus-level classification of extant Cettiidae (syn.: Scotocercidae) following the AviList checklist v2025. (link) The number of subspecies is given in parentheses. Note that subfamily recognition in Horornis canturians and H. diphone should be discontinued (Wei et al., 2024). The principal phylogenetic arrangement is based on Alström et al. (2011a), while the phylogenetic position of Scotocerca is based on Alström et al. (2011b) and Oliveros et al. (2019). The relationships match that of the BOW Phylogeny Explorer tree v1.6 (link). 

References [annotated]

Alström P, Ericson PGP, Olsson U, and Sundberg P (2006), Phylogeny and classification of the avian superfamily Sylvioidea, Mol. Phylogenet. Evol. 38, 381-397. (abstract) [note: provided a phylogeny of seven cettiid species in seven different genera, but couldn‘t confidently place Abroscopus; didn‘t include Hemitesia and Scotocerca]

Alström P, Höhna S, Gelang M, Ericson PGP, and Olsson U (2011a), Non-monophyly and intricate morphological evolution within the avian family Cettiidae revealed by multilocus analysis of a taxonomically densely sampled dataset, BMC Evol. Biol. 11, e:352. (pdf) [note: provided a species-level phylogeny, but didn’t sample Scotocerca inquieta] 

Alström P, Fjeldså J, Fregin S, and Olsson U (2011b), Gross morphology betrays phylogeny: the Scrub Warbler Scotocerca inquieta is not a cisticolid, Ibis 153, 87-97. (abstract) (author‘s pdf) [note: provided a phylogeny of four species from different genera (Abroscopus, Cettia, Horornis, and Scotocerca) and found Scotocerca to be the basalmost taxon]

Irestedt M, Gelang M, Sangster G, Olsson U, Ericson PGP, and Alström P (2011), Neumann's Warbler Hemitesia neumanni (Sylvioidea): the sole African member of a Palaeotropic Miocene avifauna, Ibis 153, 78-86. (abstract) [note: provided a genus-level timetree of Cettiidae, but lacking Scotocerca; still used genus names Cettia and Orthotomus instead of Horornis and Phyllergates, respectively]

Oliveros CH, Field DJ, Ksepka DT, Barker KF, Aleixo A, Andersen MJ, Alström P, Benz BW, Braun EL, Braun MJ, Bravo GA, Brumfield RT, Chesser RT, Claramunt S, Cracraft J, Cuervo AM, Derryberry EP, Glenn TC, Harvey MG, Hosner PA, Joseph L, Kimball RT, Mack AL, Miskelly CM, Peterson AT, Robbins MB, Sheldon FH, Silveira LF, Smith BT, White ND, Moyle RG, and Faircloth BC (2019), Earth history and the passerine superradiation, Proc. Natl. Acad. Sci. U.S.A. 116, 7915-25. (pdf) [note: treated three cettiid species (Abroscopus albigularis, Scotocerca inquieta, and Tesia cyaniventer) as Scotocercidae]

Stiller J, Feng S, Chowdhury AA, Rivas-González I, Duchêne DA, Fang Q, Deng Y, Kozlov A, Stamatakis A, Claramunt S, Nguyen JMT, Ho SYW, Faircloth BC, Haag J, Houde P, Cracraft J, Balaban M, Mai U, Chen G, Gao R, Zhou C, Xie Y, Huang Z, Cao Z, Yan Z, Ogilvie HA, Nakhleh L, Lindow B, Morel B, Fjeldså J, Hosner PA, da Fonseca RR, Petersen B, Tobias JA, Székely T, Kennedy JD, Reeve AH, Liker A, Stervander M, Antunes A, Tietze DT, Bertelsen M, Lei F, Rahbek C, Graves GR, Schierup MH, Warnow T, Braun EL, Gilbert MTP, Jarvis ED, Mirarab S, and Zhang G (2024), Complexity of avian evolution revealed by family-level genomes, Nature 629, 851-860. (pdf) [note: treated two cettiid species (Cettia cetti and Horornis vulcanius) as Scotocercidae]

Wei C, Peng L, Zhang Y, Nishiumi I, Carey GJ, Liu Z, Alström P, Dong L, and Liu Y (2024), Integrative taxonomy of an East Asian songbird indicates rapid dwarfism after island colonization, Zool. Scr. 53, 509-522. (abstract) [focal taxa: Horornis diphone - H. canturians complex; according to the timetree depicted in Fig. 2b, none of the currently recognised subfamilies, except H. d. diphone, is monophyletic]