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Fig. 8 in A new Oligocene site with terrestrial mammals and a selachian fauna from Minqar Tibaghbagh, the Western Desert of Egypt

Fig. 8. Left hyracoid astragalus, cf. Antilohyrax sp. (CGM67188) from the BOTM, early Oligocene, Minqar Tibaghbagh, Qattara Depression, Egypt, in plantar (A), lateral (B), and mediodorsal (C) views (photographs: A1–C1; explanatory drawings: A2–C2). D. Outline drawing of Antilohyrax pectidens from the Fayum Depression, Egypt in dorsal view, showing the similarities with the astragalus from Minqar Tibaghbagh (based on Rasmussen and Simons 2000: fig. 6b). Arrows point at the characteristic saddle-shaped navicular facet, broken parts indicated by dotted lines.

Fig. 3 in A new Oligocene site with terrestrial mammals and a selachian fauna from Minqar Tibaghbagh, the Western Desert of Egypt

Fig. 3. Comparison between Eocene and Oligocene strata at Minqar Tibaghbagh, El-Qara, El-Arag, and the Fayum Depression, Egypt.

Fig. 10 in A new Oligocene site with terrestrial mammals and a selachian fauna from Minqar Tibaghbagh, the Western Desert of Egypt

Fig. 10. Right anthracotheriid astragalus, cf. Bothriogenys sp. from the BOTM, early Oligocene, Minqar Tibaghbagh, Qattara Depression, Egypt, in plantar (A), lateral (B), and dorsal (C) views (photographs, A1–C1; explanatory drawings, A2–C2). Missing, reconstructed parts indicated by dotted lines. Drawings reconstructed by projection on pictures from Sileem and Hewaidy (2015: fig. 5B2, B4, B1, respectively).

Fig. 6 in A new Oligocene site with terrestrial mammals and a selachian fauna from Minqar Tibaghbagh, the Western Desert of Egypt

Fig. 6. Molars of palaeomastodontid proboscideans cf. Phiomia sp. (A, B) and Phiomia sp. (C) from the BOTM, early Oligocene, Minqar Tibaghbagh, Qattara Depression, Egypt. A. Left M3 or M2 (CGM67199) in occlusal view (A1 stereopair; A2, reconstruction; A3, line drawing based on this reconstruction). A2 has been reconstructed by removing the fissures with Photoshop. B. Left M3? (CGM67189) in occlusal view (B1, photograph; B2, line drawing). C. Left m3 (CGM67187) in lingual (C1, arrow points at wear facet), buccal (C2), and occlusal (C3 stereopair; C4, reconstruction; C5, line drawing) views. C4 has been reconstructed by projection on a picture from Tobien (1978: fig. 19). Anterior is downwards. Scale bars 30 mm.

Fig. 1 in A new Oligocene site with terrestrial mammals and a selachian fauna from Minqar Tibaghbagh, the Western Desert of Egypt

Fig. 1. Stratigraphic section of the Oligocene sediments at Minqar Tibaghbagh, Qattara Depression, Egypt. BOTM and BOS are indicated on the left of the section.

Fig. 11 in A new Oligocene site with terrestrial mammals and a selachian fauna from Minqar Tibaghbagh, the Western Desert of Egypt

Fig. 11. Bivariate plot of an anthracotheriid astragalus, cf. Bothriogenys sp., from the BOTM, early Oligocene, Minqar Tibaghbagh, Qattara Depression, Egypt (star), compared with astragali of Bothriogenys sp., from the Jebel Qatrani (black and white triangles) and Qasr El-Sagha (grey triangle) formations of the Fayum Depression, Egypt. Original dimensions of the astragalus from Tibaghbagh have been estimated, because of damage. Dimensions of the other astragali are from Andrews (1906: fig. 61, black triangle) and Sileem and Hewaidy (2015: table 1, grey triangle and white triangles).

Fig. 5 in A new Oligocene site with terrestrial mammals and a selachian fauna from Minqar Tibaghbagh, the Western Desert of Egypt

Fig. 5. Variegated layers in the lower part of the Oligocene sediments, right upon the BOTM at Minqar Tibaghbagh, Qattara Depression, Egypt. Point of view: E 26°26.380', N 29°10.880'.

Fig. 8 in A new tribe of castoroidine beavers from the late Arikareean to Hemphillian (Oligocene-Miocene) of western North America

Fig. 8. Dentary of castoroidine beaver Hystricops venustus Leidy, 1858, UNSM 75995 (cast) from Barstovian (middle Miocene) Valentine Formation, southeastern Nebraska, USA, in dorsal (A), lateral (B), medial (C), and posterior (D) views.

Fig. 7 in A new tribe of castoroidine beavers from the late Arikareean to Hemphillian (Oligocene-Miocene) of western North America

Fig. 7. Maxilla and dentary of castoroidine beaver Hystricops venustus Leidy, 1858, from Clarendonian (late Miocene) Ash Hollow Formation, Nebraska, USA. A. F:AM 64041, left maxilla with P4–M3 in occlusal (A1) and lateral (A2) views. B. F:AM 64049, left dentary with i1, p4–m3 in occlusal (B1) and lateral (B2) views.

Fig. 6 in A new tribe of castoroidine beavers from the late Arikareean to Hemphillian (Oligocene-Miocene) of western North America

Fig. 6. Occlusal views of upper cheek teeth of castoroidine beaver Hystricops venustus Leidy, 1858, from Clarendonian (late Miocene) Ash Hollow Formation, Nebraska, USA. A. F:AM 64041, left P4–M3. B. F:AM 65026, left P4–M1.

Fig. 5 in A new tribe of castoroidine beavers from the late Arikareean to Hemphillian (Oligocene-Miocene) of western North America

Fig. 5. Lower incisors of castoroidine beaver Priusaulax and Anchitheriomys in anterior views. A. Priusaulax wilsoni sp. nov., UNSM 119711 (holotype) from early Hemingfordian (early Miocene) Pawnee Creek Formation, Colorado, USA. B. Priusaulax senrudi (Wood, 1945), AMNH 39415 (holotype) from Barstovian (middle Miocene) Chalky Buttes, Montana, USA. C. Anchitheriomys stouti Korth, 2001a, AMNH 64017 (holotype) from Hemingfordian (early Miocene) Running Water Formation, Nebraska, USA.

Fig. 4 in A new tribe of castoroidine beavers from the late Arikareean to Hemphillian (Oligocene-Miocene) of western North America

Fig. 4. Holotype of castoroidine beaver Priusaulax senrudi (Wood, 1945), AMNH 39415 (cast) from Barstovian (middle Miocene) Chalky Buttes, Montana, USA. Dentary in lateral view (A) and dorsal view with p4–m3 in occlusal view (B).

Fig. 2 in A new tribe of castoroidine beavers from the late Arikareean to Hemphillian (Oligocene-Miocene) of western North America

Fig. 2. Cheek teeth of castoroidine beaver Priusaulax wilsoni sp. nov. A. KU 10173 (holotype) from early Hemingfordian (early Miocene) Pawnee Creek Formation, Colorado, USA, right P4–M3 in occlusal view. B. UNSM 26599 from Hemingfordian (early Miocene) Upper Arikaree Group, Nebraska, USA, p4 (in crypt)–m3 (B1) and dp4 (B2) in occlusal views.

Fig. 1 in A new tribe of castoroidine beavers from the late Arikareean to Hemphillian (Oligocene-Miocene) of western North America

Fig. 1. Crania of castoroidine beavers Priusaulax spp. A. Priusaulax wilsoni sp. nov., KU 10173 (holotype) from the early Hemingfordian (early Miocene) of Colorado, USA, in dorsal (A1), ventral (A2), and right lateral (A3) views. B. Priusaulax browni Korth and Bailey, 2006, UNSM 119707 from the late Arikareean (earliest Miocene) of Nebraska, USA, in right lateral view.

Fig. 3 in A new tribe of castoroidine beavers from the late Arikareean to Hemphillian (Oligocene-Miocene) of western North America

Fig. 3. Dentary of Priusaulax wilsoni sp. nov., UNSM 26599 from Hemingfordian (early Miocene) Upper Arikaree Group, Nebraska, USA, in right lateral (A) and posterior (B) views.

Fig. 15 in A middle Eocene seep deposit with silicified fauna from the Humptulips Formation in western Washington State, USA

Fig. 15. The orbitestellid gastropod Orbitestella dioi sp. nov. from the middle Eocene Satsop Weatherwax seep deposit, Washington State, USA. A. NRM Mo 185033; specimen with 2.25 whorls in apical view (A1); apertural view showing a rounded aperture (A2); close-up on protoconch, arrow indicates protoconch-teleoconch transition (A3). B. NRM Mo 185034 (holotype) with roughly 2 whorls in apical (B1) and oblique (B2) views; close-up on protoconch (B3).

Fig. 16 in A middle Eocene seep deposit with silicified fauna from the Humptulips Formation in western Washington State, USA

Fig. 16. The lepidopleurid polyplacophoran Leptochiton terryiverseni sp. nov. from the middle Eocene Satsop Weatherwax seep deposit, Washington State, USA; all specimens represented by intermediate valves. A. NRM Mo 185035 (paratype); isolated valve with preserved apophyses in dorsal (A1) and anterior (A2) views; close-up of sculpture (A3). B. NRM Mo 185036 (holotype), three articulated valves in dorsal (B1), posterior (B2), and lateral (B3) views. C. NRM Mo 185037 (paratype); isolated valve showing the broad jugal sinus in lateral (C1), dorsal (C2), and ventral (C3) views.

Fig. 4 in A middle Eocene seep deposit with silicified fauna from the Humptulips Formation in western Washington State, USA

Fig. 4. The thyasirid bivalve Thyasira (Thyasira) sp. from the middle Eocene Satsop Weatherwax seep deposit, Washington State, USA. A. NRM Mo 185006; posterodorsal view of right valve hinge and umbo with two prominent ridges (A1); lateral view (A2); close-up on posterodorsal ridges (A3). B. NRM Mo 185007 with edentulous hinge (B1); close-up on prodissoconch (B2).

Fig. 1 in A middle Eocene seep deposit with silicified fauna from the Humptulips Formation in western Washington State, USA

Fig. 1. Maps showing the location of the Satsop Weatherwax locality in Grays Harbor County in Washington State, USA; location of the enlarged map indicated by white rectangle.

Fig. 11 in A middle Eocene seep deposit with silicified fauna from the Humptulips Formation in western Washington State, USA

Fig. 11. Invertebrate fossils from the middle Eocene Satsop Weatherwax seep deposit, Washington State, USA. A. The inarticulate brachiopod Discinisca sp. (NRM Br 149701); view on upper surface (A1) and close-up of sculpture (A2). B–D. Probable serpulid tubes; specimens with flanges (B, NRM An 3073; C, NRM An 3074); a partially coiled specimen lacking flanges (D, NRM An 3075). E. Spine possibly belonging to an atelostomatan echinoid (NRM Ec 34702), complete specimen (E1) and detail of sculpture (E2). F. Scaphopod with fine concentric ribs (NRM Mo 185038).