A new Miocene baleen whale from the Peruvian desert
Felix G.Marx, NaokiKohno
Published 5 October 2016.DOI: 10.1098/rsos.160542
Felix G. Marx
Department of Geology and Palaeontology, National Museum of Nature and Science, Tsukuba, JapanSchool of Biological Sciences, Monash University, 25 Rainforest Walk, Clayton, Victoria 3800, AustraliaGeosciences, Museum Victoria, Melbourne, AustraliaDirectorate of Earth and History of Life, Royal Belgian Institute of Natural Sciences, Brussels, Belgium
Type locality and horizon of Incakujira anillodefuego. (a) Location of Aguada de Lomas within the Sacaco Basin, southern Peru; (b) stratigraphic column of the Pisco Formation, modified from , with the horizon that yielded I. anillodefuego indicated on the right. Abbreviations mark the following vertebrate horizons: AGL, Aguada de Lomas; ELJ, El Jahuay; MTM, Montemar; SAS, Sud Sacaco (West); SAO, Sacaco. Drawing of balaenopterid by C. Buell.
Paratype (KPM NNV730) of Incakujira anillodefuego. (a) Skull vertex and (b) skull, both in dorsal view; (c) skeleton as exhibited at the Kanagawa Prefectural Museum of Natural History, Odawara, Japan, in slightly anterior dorsolateral view. Dark area near tip of rostrum is a shadow caused by strong exhibition spotlights.
Holotype (GNHM Fs-098-12) cranium and mandibles of Incakujira anillodefuego. (a) Photograph and (b) line drawing of the skull in lateral view; (c) mandibles and fossilized baleen, in dorsal view; (d) photograph and (e) line drawing of the left orbit. tymp.-periotic, tympanoperiotic.
Tympanic bulla of the holotype (GNHM Fs-098-12) of Incakujira anillodefuego. (a) Dorsal, (b) medial, (c) ventral, (d) lateral, (e) anterior and (f) posterior view; (a–f) photographs and (a′–f′) line drawings.
Malleus of the holotype (GNHM Fs-098-12) of Incakujira anillodefuego. (a) Photograph and (b) line drawing, both in posterior view; (c) position of malleus on the tympanic bulla, in slightly posterior dorsomedial view.
Vertebrae and ribs of the holotype (GNHM Fs-098-12) of Incakujira anillodefuego. Thoracic and anterior lumbar vertebrae in (a) left and (c) right dorsolateral view; (b) cervical vertebrae in oblique anterolateral view.
Phylogenetic relationships of Incakujira anillodefuego. Consensus tree showing all compatible clades (‘allcompat’ option in MrBayes) summarizing the results of the total evidence analysis. Only posterior probabilities greater than 50% are shown. Bold branches mark extant lineages. Drawings of cetaceans by C. Buell.
Measurements (in millimetres) of the holotype (GNHM Fs-098-12) and paratype (KPM NNV730) skulls of Incakujira anillodefuego.
maximum width of temporal fossa
anteroposterior diameter of orbit
maximum width of anterior portion of premaxilla
maximum width of ascending process of premaxilla
width of ascending process of maxilla at base
width of ascending process of maxilla at tip
maximum length of nasal
width of nasal at anterior border
width of nasal at tip of narial process of frontal
maximum width of narial fossa
Measurements (in millimetres) of the holotype (GNHM Fs-098-12) ear bones of Incakujira anillodefuego.
width just anterior to sigmoid process
width of sigmoid process
height of sigmoid process in lateral view (to base of sigmoid cleft)
maximum height of head
width of manubrium
length of anterior process (from base of mallear ridge)
Measurements (in millimetres) of the holotype (GNHM Fs-098-12) and paratype (KPM NNV730) forelimbs of Incakujira anillodefuego.
scapula, maximum length
scapula, maximum height
humerus, maximum proximodistal length including epiphyses
humerus, maximum width of shaft in lateral view
radius, maximum proximodistal length
ulna, maximum proximodistal length excluding olecranon
Measurements (in millimetres) of the holotype (GNHM Fs-098-12) and paratype (KPM NNV730) vertebral columns of Incakujira anillodefuego. Lumbars and caudals of GNHM F2-098-12 are not included as their individual identifications cannot be determined with certainty.