Pterodroma undefined-B

Pterodroma sp.B This name includes material that is similar in morphology and close in size to those of the current Pt. deserta, Pt. feae, and Pt. cahow, so they could be included in any of these species. Nevertheless, it also remains possible (even probable) that they represent one or more cryptic unknown species (Figs 3, 4, 6, 7; Tables 2, 3, 4; Supporting Information, Figs S1–S8). Material and collection information: See Supporting Information, Table S1. Horizon: Late Quaternary–Recent. Distribution: Porto dos Frades (Porto Santo, Madeira Archipelago), Madeira Island, and the Azores (São Miguel, Terceira, Graciosa, São Jorge, and Pico). Remarks: The 14 C date of two fragments of ulna (proximal right and distal left) of one specimen of Pterodroma sp. B from Furna das Torres, Pico (Azores): RICH-21398 and 1654 ± 30 BP, was calibrated with 38 ± 139 (∆ R ± SD) providing the interval 665–1263 CE (Table 1). These bones are longer than those of the current Pt. madeira (Tables 2–4; Figs 3, 4, 6, 7). The ANOVA performed with the ulna lengths of the current Pt. madeira and those from these material [from Madeira Island, Porto dos Frades (Porto Santo), and Graciosa, Pico, and São Miguel (Azores)] indicate a smaller size of Pt. madeira bones (F 5,62 = 18 526; P <.001). The carpometacarpus from Madeira Island, Porto dos Frades (Porto Santo), Graciosa, and Pico are longer than those of the current Pt. madeira (U = –2.170; P =.03, U = –2.846; P =.004, U = –2.536; P =.011, and U = –2.449; P =.014, respectively). In addition, the ANOVA performed with the tarsometatarsus lengths of the current Pt. madeira and those of Pterodroma sp. B from the island of Madeira sites and from Porto Santo (Porto dos Frades) indicate a small size of the former (F 2,41 = 53 326; P <.001). The material of this genus found in the Canary Islands (El Hierro) (Rando 2002) is of a similar size to those of this group (Tables 2, 4; Figs 3, 4, 6, 7). No differences were found in the carpometacarpus lengths between the fossil bones from El Hierro, the fossils from Pico (U = –0,816; P =.414), São Jorge (U = –0,655; P =.513), Porto dos Frades (U = –1528; P =.126), and the bones of the current specimens of Pt. cahow (U = –1061; P =.289) and Pt. deserta (U = –0,707; P =.48).