Bioacoustics of Locustellidae

Diagnosis .—Sameȱ asȱ forȱ theȱ typeȱ genusȱ (Collarȱ 2006).ȱ Thus,ȱ Robsoniinaeȱ differsȱ from all other oscine passerines by a combination of: (i) absence of rictal bristles; (ii) partfeathered nares; (iii) broad white tips to the wing-coverts and outer 2–3 primaries; (iv) very copious, dense, elongate rump feathering; (v) fairly long and slightly hooked bill, as in Turdinus Blyth, 1844 ; (vi) high-pitched, insect-like main vocalisation; and (vii) habit of walking ( Collar 2006: 108 ). In addition, our alignment, using MUSCLE ( Edgar 2004 ) as implemented in MEGA7 (Kumar et al .ȱ 2016),ȱ ofȱ theȱ fifthȱ intronȱ ofȱ theȱ nuclearȱ geneȱ β-fibrinogenȱ (Fib5)ȱ datasetsȱ ofȱ Moyle et al . (2012) , Oliveros et al . (2012) and Hosner et al . (2013) obtained from GenBank, shows that there is a 1 bp insertion (corresponding to position 268 of sequence JN 8261411 of R. sorsogonensis ) and a 1 bp deletion (corresponding to position 541 of JN826141 ) that are synapomorphic for Robsonius (and hence Robsoniinae ). The alignment used for assessing indelsȱinȱtheȱfifthȱintronȱofȱtheȱnuclearȱgeneȱβ-fibrinogenȱisȱavailableȱatȱZenodoȱ(https://doi.org/10.5281/zenodo.15037864). Included taxa .— Robsonius sorsogonensis ( Rand & Rabor, 1967 ) , R. rabori ( Rand, 1960 ) and R. thompsoni Hosner, Boggess, Alviola, Sánchez-González, Oliveros, Urriza & Moyle, 2013 .