Figure 4 in Fregetta lineata (Peale, 1848) is a valid extant species endemic to New Caledonia

Figure 4. Top row: results of Principal Component Analyses performed on six biometrics (bill width, bill depth at gonys, and culmen, wing, tail and tarsus lengths) taken from specimens of Black-bellied Storm Petrel Fregetta tropica (11 populations), small White-bellied Storm Petrels F. grallaria (six populations), the large Titan Storm Petrel F. [g.] titan (Rapa Island) and F. maoriana (New Zealand). The two Brisbane specimens and the specimens ('lineata') from Samoa and ('guttata') from Ua Pou were treated individually. (A) All taxa, plus the four museum specimens. (B) Same analysis performed on individual skins showing distinct taxa and breeding localities. (C) Same analysis for only the five recognised taxa. Bottom row: results of Discriminant Analyses performed on individual specimens from New Caledonian Storm Petrel 'Fregetta lineata' (a regrouping of 'lineata, guttata and QM 14391'), small White-bellied Storm Petrels F. grallaria, Black-bellied Storm Petrel F. tropica (including QM 31216), New Zealand Storm Petrel F. maoriana, and the large Titan Storm Petrel F. [g.] titan. (D) Grouped by nine breeding localities. (E) Same analysis performed on the five taxa as a priori groups. (F) Same analysis performed on a reduced set of taxa (lineata, grallaria and tropica). In all plots, each point represents a specimen, except in 4A.