• Phylogenetic placement: Acanthisitti
• Distribution: endemic to New Zealand
• Number of extant and recently extinct genera: 3
• Number of extant and recently extinct species: 4

Traditional genus-level classification of extant and recently extinct (red letters) Acanthisittidae following the AviList checklist v2025. (link) The number of subspecies is given in parentheses. The phylogenetic arrangement is based on Mitchell et al. (2016) and matches the topology of the BOW Phylogeny Explorer tree v1.6 (link). 

Bibliography [annotated]

Mitchell KJ, Wood JR, Llamas B, McLenachan PA, Kardailsky O, Scofield RP, Worthy TH, and Cooper A (2016), Ancient mitochondrial genomes clarify the evolutionary history of New Zealand’s enigmatic acanthisittid wrens, Mol. Phylogenet. Evol. 102, 295-304. (abstract) [focal taxa: two (or possibly three) extinct and two extant species]

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: including Acanthisitta and Xenicus]

Verry AJF, Scarsbrook L, Scofield RP, Tennyson AJD, Weston KA, Robertson BC, and Rawlence NJ (2019), Who, where, what, wren? Using ancient DNA to examine the veracity of museum specimen data: a case study of the New Zealand Rock Wren (Xenicus gilviventris), Front. Ecol. Evol. 7, e:496. (free pdf)