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227 results for “Mysticeti”
FIG. 6 in The anatomy and relationships of Piscobalaena nana (Cetacea, Mysticeti), a Cetotheriidae s.s. from the early Pliocene of Peru
FIG. 6. — Piscobalaena nana: A, ventral view of the skull (MNHN SAS 1618); B, reconstruction. Abbreviations: see p. 322. Scale bar: 20 cm.
FIG. 5 in The anatomy and relationships of Piscobalaena nana (Cetacea, Mysticeti), a Cetotheriidae s.s. from the early Pliocene of Peru
FIG. 5. — Piscobalaena nana: A, dorsal view of the skull MNHN SAS 1617; B, reconstruction. Abbreviations: see p. 322. Scale bar: 20 cm.
FIG. 4 in The anatomy and relationships of Piscobalaena nana (Cetacea, Mysticeti), a Cetotheriidae s.s. from the early Pliocene of Peru
FIG. 4. — Piscobalaena nana, dorsal view of the skull of four individual to show the size individual variation within the species: A, "old juvenile" or sub-adult (MNHN SAS 1616); B, adult (MNHN SAS 1617); C, adult (MNHN SAS 1618); D, old adult (MNHN SAS 1623). Scale bar: 20 cm.
FIG. 2 in The anatomy and relationships of Piscobalaena nana (Cetacea, Mysticeti), a Cetotheriidae s.s. from the early Pliocene of Peru
FIG. 2. — Piscobalaena nana, holotype (SMNK Pal 4050), basicranium: A, dorsal view; B, ventral view. Scale bar: 10 cm.
FIG. 1 in The anatomy and relationships of Piscobalaena nana (Cetacea, Mysticeti), a Cetotheriidae s.s. from the early Pliocene of Peru
FIG. 1. — Piscobalaena nana, holotype (SMNK Pal 4050), skull: A, dorsal view; B, ventral view. Scale bar: 10 cm.
Figure 10 in Morphology and phylogenetic relationships of a new eschrichtiid genus (Cetacea: Mysticeti) from the Early Pliocene of northern Italy
Figure 10. Phylogenetic relationships of Eschrichtioides gastaldii gen. nov., comb. nov.. Strict consensus tree from nine equally most-parsimonious trees. Tree statistics: tree length, 503 steps; Consistency Index (CI), 0.5447; Retention Index (RI), 0.8115; Homoplasy Index (HI), 0.4553; Rescaled CI, 0.4421.
Figure 9 in Morphology and phylogenetic relationships of a new eschrichtiid genus (Cetacea: Mysticeti) from the Early Pliocene of northern Italy
Figure 9. Eschrichtioides gastaldii gen. nov., comb. nov.: forelimb (redrawn from Portis, 1885). A, lateral and medial views of humerus. B, lateral and medial views of ulna (lateral view). Scale bar = 100 mm. Horizontal lines indicate shark bite marks discussed by Bianucci et al. (2002).
Figure 7 in Morphology and phylogenetic relationships of a new eschrichtiid genus (Cetacea: Mysticeti) from the Early Pliocene of northern Italy
Figure 7. Eschrichtioides gastaldii gen. nov., comb. nov.: cross-sections of dentary. Selected cross-sections of the left dentary. Numbers over the sections are mm from the anterior end of the dentary. Scale bar = 100 mm. Explanation of abbreviations: a, coronoid process; b, groove between coronoid and satellite process; c, satellite process; mdf, mandibular foramen; *, groove for mental ligament. Broken line indicates missing portion of dentary.
Figure 6 in Morphology and phylogenetic relationships of a new eschrichtiid genus (Cetacea: Mysticeti) from the Early Pliocene of northern Italy
Figure 6. Eschrichtioides gastaldii gen. nov., comb. nov.. A, left dentary, medial view. B, left dentary, lateral view. C, right dentary, dorsal view. D, close-up of the left dentary showing the condyle and coronoid region in medial view. Scale bar = 15 cm in A, B and C, and 5 cm in D.
Figure 8 in Morphology and phylogenetic relationships of a new eschrichtiid genus (Cetacea: Mysticeti) from the Early Pliocene of northern Italy
Figure 8. Eschrichtioides gastaldii gen. nov., comb. nov.: postcrania. A, atlas (rostral view). B, axis (caudal view). C, lumbar vertebra (rostral view). D, caudal vertebra (lateral view). E, ribs of the right side (note double-headed rib shown by arrowhead). Scale bars = 100 mm.
Figure 4 in Morphology and phylogenetic relationships of a new eschrichtiid genus (Cetacea: Mysticeti) from the Early Pliocene of northern Italy
Figure 4. Eschrichtioides gastaldii gen. nov., comb. nov.: vertex. See Anatomical abbreviations for explanation of lettering. Scale bar = 5 cm.
Figure 11 in Morphology and phylogenetic relationships of a new eschrichtiid genus (Cetacea: Mysticeti) from the Early Pliocene of northern Italy
Figure 11. Fifty-% majority-rule strict consensus bootstrap tree; tree statistics: CI, 0.568; RI, 0.7582; HI, 0.5173; Rescaled CI, 0.3659. Numbers above branch are bootstrap support values; numbers in bold are values higher than 80%.
Figure 2 in Morphology and phylogenetic relationships of a new eschrichtiid genus (Cetacea: Mysticeti) from the Early Pliocene of northern Italy
Figure 2. Eschrichtioides gastaldii gen. nov., comb. nov.: skull. A, dorsal view. B, right lateral view. C, ventral view. D, posterior view. Scale bar = 20 cm.
Fig. 1 in Cetotheriidae (Cetacea, Mysticeti) From The Collections Of The National Geological Museum, Bucharest (Romania)
Fig. 1. Location of the studied area in Romania (left) and the geological structures and location of the fossiliferous localities (right) in Gorj County (modified after Codarcea et al., 1968): 1 — Igneous rocks; 2 — Sarmatian s. l.; 3 — Maeotian; 4 — Upper Besarabian–Maeotian; 5 — Holocene; 6 — Pleistocene; 7 — Volhynian–Lower richnessBessarabian(Bercia; 8 —et al., fossiliferous 1968). Theselocality. deposits are situated in the Novaci depression and continue to the east and to the west, as well as south of the Ciocadia–Săcel anticline (Bercia et al., 1968). The paleontological content is also represented by invertebrate species such as: Unio cf. subrecurvus Teisseyre 1907, Radix cf. velutina Deshayes 1838, and Congeria navicula Andrusov 1897 (Popescu, 1955; Bercia et al., 1968). The last sedimentary sequence, situated east of the Cerna River, on the northern rim of the Dacian Basin is composed of detritic deposits containing rare Mactra Linnaeus 1767 remains, characteristic of the Bessarabian and Khersonian, while eastwards, towards Râmnicu Vâlcea these detritic deposits overlay the Lower Bessarabian formations with C. pesanseris, and above these, the Maeotian deposits, predominantly detritic, composed of sands and sandy marls with gravel interlays follow (Bercia et al., 1968).
Fig. 3 in Cetotheriidae (Cetacea, Mysticeti) From The Collections Of The National Geological Museum, Bucharest (Romania)
Fig. 3. Cetotheriidae lumbar vertebrae: 10.068 in: A — cranial view; B — caudal view; C — lateral view; D — dorsal view; E — ventral view; 10.064 in: F — cranial view; G — caudal view; H — lateral view; I — dorsal view; J — ventral view; 10.066 in: K — cranial view; L — caudal view; M — lateral view; N — dorsal view; O — ventral view; 10.069 in: P — cranial view; Q — caudal view; R — lateral view; S — dorsal view; T — ventral view; 21.115 in: U — cranial view; V — caudal view; W — lateral view; X — dorsal view; Y — ventral view. Scale bar 10 mm.
Fig. 2 in Cetotheriidae (Cetacea, Mysticeti) From The Collections Of The National Geological Museum, Bucharest (Romania)
Fig. 2. Cetotheriidae caudal vertebrae: 10.096 in: A — cranial view; B — caudal view; C — lateral view. D — dorsal view; E — ventral view; 10.067 in: F — cranial view; G — caudal view; H — lateral view; I — dorsal view; J — ventral view; 10.143 in: K — cranial view; L — caudal view; M — lateral view; N — dorsal view; O — ventral view; 21.113 in: P — cranial view; Q — caudal view; R — lateral view; S — dorsal view; T — ventral view; 21.114 in: U — cranial view; V — caudal view; W — lateral view; X — dorsal view; Y — ventral view; 21.116 in: Z — cranial view; A` — caudal view; B` — lateral view; C` — dorsal view; D` — ventral view; 21.117 in: E` — cranial view; F` — caudal view; G` — lateral view; H` — dorsal view; I` — ventral view; 21.118 in: J` — cranial view; K` — caudal view. L` — lateral view; M` — dorsal view; N` — ventral view; 10.097 in: O` — cranial view; P` — caudal view; Q` — lateral view; R` — Dorsal view; S` — ventral view. Scale bar 10 mm.
Fig. 4 in Cetotheriidae (Cetacea, Mysticeti) From The Collections Of The National Geological Museum, Bucharest (Romania)
Fig. 4. Mithridatocetus sp. humerus 21.112 in: A — anterior view; B — posterior view; C — ventral view; D — dorsal view. Scale bar 10 mm.
Data from: Echericetus novellus n. gen. n. sp. (Cetacea: Mysticeti: Eomysticetidae), an Oligocene baleen whale from Baja California Sur, Mexico
<p><span>Among the several evolutionary lineages of the baleen whales (Mysticeti), the eomysticetids are an ancient successful family that retain possibly non-functional teeth and functional baleen, a transitional stage between toothed and baleen-assisted filter-feeding mysticetes. However, the patchy fossil record leaves gaps in eomysticetids palaeobiology interpretations but their diversity and widespread geographical distribution can be a relevant proxy to understanding the evolution of crown Mysticeti. Here, we describe a new baleen whale, <em>Echericetus novellus</em> n. gen. n. sp., from the Oligocene of Mexico (slightly older than 27.95 million years ago). This new taxon has morphological features that show its affinity to Eomysticetidae, such as the intertemporal region longer than wide, elongate and oval temporal fossa, and a well-developed and lobate coronoid process of the mandible. Similarly, our cladistic analyses confirm the inclusion of <em>Echericetus</em> in the Eomysticetidae. <em>Echericetus</em> reinforces our notion of the eomysticetid diversity and disparity. Geographically, the existence of <em>Echericetus</em> from Mexico also indicates that eomysticetids inhabited subtropical regions in the Northern Hemisphere. Lastly, our discovery of a new eomysticetid from the Oligocene of Mexico provides new insights into the distribution patterns and habitat use of Eomysticetidae, essential to further explain the demise of this transitional lineage between toothed and baleen-bearing whales.</span></p>
FIG. 24 in The anatomy and relationships of Piscobalaena nana (Cetacea, Mysticeti), a Cetotheriidae s.s. from the early Pliocene of Peru
FIG. 24. — Piscobalaena nana, MNHN SAS 1617, right ribs. Scale bar: 20 cm.
FIG. 7 in The anatomy and relationships of Piscobalaena nana (Cetacea, Mysticeti), a Cetotheriidae s.s. from the early Pliocene of Peru
FIG. 7. — Piscobalaena nana, lateral view of the skull (MNHN SAS 1617). Scale bar: 20 cm.
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