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532 results for “middle Eocene”
Fig. 11 in A New Protocetid Whale (Cetacea: Archaeoceti) from the Late Middle Eocene of South Carolina
Fig. 11. Posterior portion of the left mandible of Carolinacetus gingerichi (ChM PV5401) in lateral (A) and medial (B) views. The great depth of the mandible between the coronoid process (cp) and the mandibular angle (man) is an autapomorphy of this genus. Scale bar is 5 cm in length. See appendix 3 for anatomical abbreviations.
Fig. 10 in A New Protocetid Whale (Cetacea: Archaeoceti) from the Late Middle Eocene of South Carolina
Fig. 10. Right tympanic bulla of Carolinacetus gingerichi (ChM PV5401) in dorsal (A) and ventral (B) view. Most of the outer lip of the bulla was not preserved. Scale bar is 5 cm in length. See appendix 3 for anatomical abbreviations.
Fig. 8 in A New Protocetid Whale (Cetacea: Archaeoceti) from the Late Middle Eocene of South Carolina
Fig. 8. Ventrolateral view of the right petrosal of Carolinacetus gingerichi (ChM PV5401). Anterior is to the top of the page and the scale bar is 1 cm in length. See appendix 3 for anatomical abbreviations.
Fig. 7 in A New Protocetid Whale (Cetacea: Archaeoceti) from the Late Middle Eocene of South Carolina
Fig. 7. Stereopairs and line drawings of the right petrosal of Carolinacetus gingerichi (ChM PV5401). A. Stereopairs of the petrosal in ventral view with (B) corresponding line drawing. C. Line drawing of the endocranial side of the petrosal with (D) corresponding stereopairs. Note the elongate tube (tiam) that houses the internal acoustic meatus and postglenoid foramen (pgf) in the petrosal/ squamosal suture. Scale bars are 2 cm in length. See appendix 3 for anatomical abbreviations.
Fig. 5 in A New Protocetid Whale (Cetacea: Archaeoceti) from the Late Middle Eocene of South Carolina
Fig. 5. Partial cranium of Carolinacetus gingerichi (ChM PV5401) in (A) dorsal and (B) lateral views. Scale bar is 5 cm in length. See appendix 3 for anatomical abbreviations.
Fig. 6 in A New Protocetid Whale (Cetacea: Archaeoceti) from the Late Middle Eocene of South Carolina
Fig. 6. Line drawing (A) and photograph (B) of the cranium of Carolinacetus gingerichi (ChM PV5401) in ventral view. Dashed line is approximate boundary between middle and posterior cranial fossae. Scale bar is 10 cm in length. See appendix 3 for anatomical abbreviations.
Fig. 4 in A New Protocetid Whale (Cetacea: Archaeoceti) from the Late Middle Eocene of South Carolina
Fig. 4. Anterior end of the rostrum of Carolinacetus gingerichi (ChM PV5401) in (A) dorsal, (B) lateral, and (C) ventral views. Note that the external nares (no) are above the canine. Scale bar is 10 cm in length. See appendix 3 for anatomical abbreviations.
Fig. 2 in A New Protocetid Whale (Cetacea: Archaeoceti) from the Late Middle Eocene of South Carolina
Fig. 2. Chronostratigraphic sequence of upper and middle Eocene carbonate units on the Coastal Plain of South Carolina and correlation with European stages and nannoplankton (NP) zones. Solid circle (v) denotes stratigraphic position of holotype of Carolinacetus gingerichi, new genus and species. Time divisions and NP zones follow Berggren et al. (1995).
Fig. 9 in A New Protocetid Whale (Cetacea: Archaeoceti) from the Late Middle Eocene of South Carolina
Fig. 9. Line drawing (left) and photograph (right) of the cranium of Carolinacetus gingerichi (ChM PV5401) in posterior view. The posterodorsal tongue of the petrosal (pdt) is an autapomorphy of Carolinacetus. Scale bars are 5 cm in length. See appendix 3 for anatomical abbreviations.
Fig. 3 in A New Protocetid Whale (Cetacea: Archaeoceti) from the Late Middle Eocene of South Carolina
Fig. 3. Reconstructions of the holotype skull of Carolinacetus gingerichi (ChM PV5401) in (A) dorsal and (B) lateral views. Gray areas indicate portions of the skull actually recovered. Scale bar is 10 cm in length. See appendix 3 for anatomical abbreviations.
Fig. 15 in A New Protocetid Whale (Cetacea: Archaeoceti) from the Late Middle Eocene of South Carolina
Fig. 15. Left (A) and right (B) m3s of Carolinacetus gingerichi (ChM PV5401) in lingual view. Scale bar is 5 cm in length. See appendix 3 for anatomical abbreviations.
Fig. 22 in A New Protocetid Whale (Cetacea: Archaeoceti) from the Late Middle Eocene of South Carolina
Fig. 22. Anterior view of the fourth thoracic vertebra of Carolinacetus gingerichi (ChM PV5401). Scale bar is 5 cm in length. See appendix 3 for anatomical abbreviations.
Fig. 1 in A New Protocetid Whale (Cetacea: Archaeoceti) from the Late Middle Eocene of South Carolina
Fig. 1. Type locality (indicated by the star) of Carolinacetus gingerichi, new genus and species: South Carolina, Berkeley County; Martin Marietta Berkeley (''Cross'') Quarry. Cross Member, Tupelo Bay Formation, late Middle Eocene (Middle Bartonian).
Fig. 26 in A New Protocetid Whale (Cetacea: Archaeoceti) from the Late Middle Eocene of South Carolina
Fig. 26. Paleocoastline map, Middle Eocene (Lutetian), ca. 45 Ma, showing paleogeographic distribution of selected protocetid taxa (AH) from Ypresian (Early Eocene) (l), Lutetian (Middle Eocene) (m), and Bartonian (Late Middle Eocene) (v) rocks, and probable route (d) of protocetid dispersal from Tethys Sea to North America. A. Himalayacetus subathuensis, Subathu Fm. (ca. 53.5 Ma), Kuthar Nala, India. B. ''Habib Rahi Limestone Whale'', Habib Rahi Fm. (ca. 48 Ma), Sulaiman Range, Pakistan. C. Various remingtonocetids and protocetids, Harudi Fm. (ca. 41 Ma), Kutch, India. D. Protocetus atavus, Mokattam Fm. (ca. 43.5 Ma), Gebel Mokattam, Egypt. E. ''Togo whale'', unspecified stratigraphic unit (ca. 45 Ma), KpogameHahotoe Basin, Togo. F. Pappocetus lugardi, Ameki Fm. (ca. 42 Ma), Ombialla District, Nigeria. G. ''Eocetus'' wardii, Castle Hayne Fm. (ca. 42 Ma), Maple Hill, North Carolina, U.S. H. Carolinacetus gingerichi, new genus and species, Tupelo Bay Fm. (ca. 40 Ma), Martin Marietta Berkeley Quarry, South Carolina, U.S.
Fig. 25 in A New Protocetid Whale (Cetacea: Archaeoceti) from the Late Middle Eocene of South Carolina
Fig. 25. Strict consensus of two most parsimonious trees of 229 steps; thick lines/black boxes to the left of taxon names indicate known temporal ranges, circles to the right of cetacean taxa indicate geographic occurrence(s). Bremer support values are placed below and to the left of each node. Note that the branching order of taxa is generally concordant with the first geologic occurrence of taxa, and we can infer that the immigration of cetaceans to North America occurred in the latter half of the Lutetian. The geologic durations of taxa are from Gingerich et al. (1997, 2001a, 2001b) and Uhen (1998a, 1998b).
Fig. 17 in A New Protocetid Whale (Cetacea: Archaeoceti) from the Late Middle Eocene of South Carolina
Fig. 17. Atlas vertebra (C1) of Carolinacetus gingerichi (ChM PV5401) in anterior (A), posterior (B), dorsal (C), and right lateral view (D). Scale bar is 5 cm in length. See appendix 3 for anatomical abbreviations.
FIG. 2 in Variation in bone histology of middle Eocene sirenians from western Europe
FIG. 2. — Histological characteristics of the ribs: A-D, specimen AR1-33 from Ardanatz (Navarre); A, general view of the medullar region at mid-diaphysis. The medulla is entirely compact and includes deposits of endosteal bone tissue (light areas), with remnants of calcified cartilage matrix interspersed between them (dark areas); B, endosteal deposits, globuli ossei and remnants of calcified cartilage matrix (*) in the diaphyseal medulla; C, deep region of the periosteal cortex at mid-diaphysis. The cortex is composed of variably oriented primary osteons (light areas), surrounded by "woven-fibered" periosteal tissue (dark areas). The asterisk indicates one annulus; D, peripheral region of the cortex. The asterisks point to several conspicuous cyclic growth marks, represented here by lines of arrested growth. Haversian remodelling is feeble; E, medullar remodelling at mid-diaphysis in the rib of specimen UZ1-30 from Uztarrotz (Navarre). The spatial density of the secondary osteons produced by Haversian remodelling is clearly more elevated than in specimen AR1. Polarized light; F, Remodelled medullar spongiosa in the proximal extremity of the rib of specimen UZ1-29 from Uztarrotz. The osseous trabeculae are extensively remodelled, and the residues of calcified cartilage are sparse, as compared to specimen AR1. Polarized light. Scale bars: A, C-F, 950 µm; B, 400 µm.
FIG. 1 in Variation in bone histology of middle Eocene sirenians from western Europe
FIG. 1. — Reconstruction of a sirenian rib from the middle Eocene of Uztarrotz (Navarre, western Pyrenees), based on specimens UZ1-21, 22 and 31, showing the outlines in cross section where the histological sections were made. Scale bar: 25 mm.
Fig. 6. Isotemnid foot. AMNH 28690. A in Morphological Diversity in the Postcranial Skeleton of Casamayoran (?Middle to Late Eocene) Notoungulata and Foot Posture in Notoungulates
Fig. 6. Isotemnid foot. AMNH 28690. A, Dorsal view of pes; B, astragalus in plantar view (left) and lateral view (right); C, calcaneum in dorsal view (left) and lateral view (right); D, line drawing illustrating maximum dorsiflexion of the upper ankle joint (left) and maximum plantarflexion (right); E, posterior view of upper ankle joint at maximum plantarflexion, showing the exposed superior astragalar foramen and groove for the tendon of the flexor hallucis longus. Abbreviations: cu, cuboid; dp, dorsal; ect f, ectal facet; ent, entocuneiform; fib, fibula; fib f, fibular facet; flx g, groove for the tendon of the flexor hallucis longus; med p, medial process; nav, navicular; nav f, navicular facet; plnt ast f, plantar astragalar foramen; pp, peroneal process; ps, peroneal shelf; sup ast f, superior astragalar foramen; tib, tibia. (The upper scale bar applies to A, B, and C, the lower bar to D and E.)
Fig. 3. Isotemnid antebrachia, ulnae A, B in Morphological Diversity in the Postcranial Skeleton of Casamayoran (?Middle to Late Eocene) Notoungulata and Foot Posture in Notoungulates
Fig. 3. Isotemnid antebrachia, ulnae A, B, and C; radii D, E, and F. A and D are of Anisotemnus distentus, AMNH 28906; B and E are of Thomashuxleya externa, AMNH 28653; C and F are of Pleurostylodon similis, AMNH 28904. All are shown as being from the right side, but the elements of Pleurostylodon (C and F) and the radius of Anisotemnus (D) are from the left, but digitally reversed to appear as right. Abbreviations are: ap, anconeal process; cp, coronoid process; and ce, capitular eminence. The olecranon process of Pleurostylodon (C) is reconstructed.
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Allen Brain Atlas
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Annotated Behaviour and Observability Dataset (ABODe)
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