Summary: | Fig. 2. Rhamphotheca of Procellariidae in lateral, dorsal, ventral and cranial view of (A) Aphrodroma brevirostris (B) Ardenna creatopus (C) Ardenna grisea (D) Calonectris diomedea (E) Daption capense (F) Fulmarus glacialoides (G) Macronectes giganteus, and (H) Pachyptila belcheri. Abbreviations: ci concave inflection on the tube, ls longitudinal sulcus, s slope, t triangle-shaped sulcus, vn ventral notch on the mandibular nail, vs ventral slope of the tube. Published as part of Piro, Alejandra, 2022, Comparative morphology of the compound rhamphotheca of tubenosed seabirds (order Procellariiformes), pp. 176-188 in Zoologischer Anzeiger 299 on page 178, DOI:10.1016/j.jcz.2022.05.012, http://zenodo.org/record/10374752
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