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FIGURE 1 in Anchitheriomys buceei (Rodentia, Castoridae) from the Miocene of Texas and a review of the Miocene beavers from the Texas Coastal Plain, USA
FIGURE 1. Miocene stratigraphy and temporal distribution of vertebrate faunas. Stratigraphy primarily based on Galloway et al. (1986) and reflects marine biostratigraphic control in down-dip locations. Symbol in the Catahoula Formation identifies approximate age of multiple Ar/Ar radiometric dates (Jordan et al., 2019). Blue bar highlights the Ba1 North American Land Mammal Age (NALMA). Time scale from Hilgren et al. (2012); Raffi, Wade and Pälike (2020). O = Orellan, W = Whitneyan, Ar = Arikareean, He = Hemingfordian, Ba = Barstovian, CL = Clarendonian, H = Hemphillian. Names shown for the vertebrate assemblages are local fauna names except for Lapara Creek Fauna (composed of multiple local faunas), and Belts Creek (single locality with three known taxa).
FIGURE 4 in Anchitheriomys buceei (Rodentia, Castoridae) from the Miocene of Texas and a review of the Miocene beavers from the Texas Coastal Plain, USA
FIGURE 4. Distribution of local faunas and castorids in the Miocene strata of the Texas Coastal Plain. Texas counties displayed roughly west to east, left to right. Time scale from Hilgren et al. (2012); Raffi, Wade and Pälike (2020).
FIGURE 5 in A large coelacanth, †Whiteia giganteus sp. nov., from the Triassic of Texas, USA, establishes a Pangean radiation of early Mesozoic actinistians
FIGURE 5. Comparative anatomy of †Whiteia giganteus gen. et sp. nov. Skull of †W. giganteus (A) compared to other species of coelacanths from the Late Paleozoic to Mesozoic of North America, including (B) †Whiteia spp. (after Schaeffer et al., 1976), (C) †Diplurus newarki (personal observation of YPM VPPU 14944), and (D) †Chinlea sorenseni (after Schaeffer, 1967). All drawings are traces over photographs. 1 = elongated preorbital region, 2 = lachrymojugal with straightened anterior process, 3 = opercle with rounded dorsal and posterior margins and pointed ventral apex. 1* = large angular foramina row, 2* = strongly angled lachrymojugal below orbit. Numbers indicate apomorphies of †Whiteia, numbers with asterisks indicate autapomorphies of the new species.
FIGURE 6 in A large coelacanth, †Whiteia giganteus sp. nov., from the Triassic of Texas, USA, establishes a Pangean radiation of early Mesozoic actinistians
FIGURE 6. Phylogenetic position of †Whiteia giganteus gen. et sp. nov. Strict consensus topology derived from phylogenetic analysis of the 59 OTU, 110-character-dataset in the parsimony program TNT v. 1.5. Numbers indicate bootstrap support values.
FIGURE 4 in A large coelacanth, †Whiteia giganteus sp. nov., from the Triassic of Texas, USA, establishes a Pangean radiation of early Mesozoic actinistians
FIGURE 4. Anatomy of †Whiteia giganteus gen. et sp. nov. YPM VP 3928 in (a) left lateral view, showing detail of mandible.
FIGURE 1 in A large coelacanth, †Whiteia giganteus sp. nov., from the Triassic of Texas, USA, establishes a Pangean radiation of early Mesozoic actinistians
FIGURE 1. Anatomy of †Whiteia giganteus gen. et sp. nov. YPM VP 3928 in (A) left lateral, (B) right lateral, (C) dorsal, and (D) ventral views.
FIGURE 2 in A large coelacanth, †Whiteia giganteus sp. nov., from the Triassic of Texas, USA, establishes a Pangean radiation of early Mesozoic actinistians
FIGURE 2. Anatomy of †Whiteia giganteus gen. et sp. nov. YPM VP 3928 in left lateral view, showing detail of rostrum.
FIGURE 3 in A large coelacanth, †Whiteia giganteus sp. nov., from the Triassic of Texas, USA, establishes a Pangean radiation of early Mesozoic actinistians
FIGURE 3. Anatomy of †Whiteia giganteus gen. et sp. nov. YPM VP 3928 in right lateral view, showing detail of exposed palate.
FIGURE 6. DMNH 2013-07-1942 in A revision of "Trinitichelys" maini (Testudinata: Baenidae) and additional material of its new genus from the Lewisville Formation (Woodbine Group, Cenomanian), Texas, USA
FIGURE 6. DMNH 2013-07-1942, Gehennachelys maini comb. nov. shoulder girdle and forelimb bones. Partial left scapula of DMNH 2013-07-1942 in A, posteromedial, and B, anterolateral views. Partial right scapula of DMNH 2013- 07-1942 in C, posteromedial, and D, anterolateral views. Partial right scapula of DMNH 2013-07-0601 in E, posteromedial, and F, anterolateral views. Right coracoid of DMNH 2013-07-1942 in G, dorsal, and H, ventral views. Partial left coracoid of DMNH 2013-07-1942 in I, dorsal, and J, ventral views. Right humerus in K, posterior, L, dorsal, M, proximal, N, distal, O, ventral, and P, posterior views. M and N are oriented with B.
FIGURE 7. DMNH 2013-07-1942 in A revision of "Trinitichelys" maini (Testudinata: Baenidae) and additional material of its new genus from the Lewisville Formation (Woodbine Group, Cenomanian), Texas, USA
FIGURE 7. DMNH 2013-07-1942 pelvic girdle and hind limb bones. Partial pelvis in A, right lateral view, oriented with anterior to the right. Partial pubic plate in B, ventral, and C, dorsal views. Left femur in D, anterior, E, ventral, F, proximal, G, distal, H, dorsal, and I, posterior views. Partial right tibia in J, dorsal, K, medial, L, ventral, and M, lateral views. Dotted line in G indicates margin of acetabulum.
FIGURE 4. HMNS-10 in A revision of "Trinitichelys" maini (Testudinata: Baenidae) and additional material of its new genus from the Lewisville Formation (Woodbine Group, Cenomanian), Texas, USA
FIGURE 4. HMNS-10-TM, shell of Gehennachelys maini comb. nov., in A, dorsal, B, ventral, C, right lateral, D, anterior, and E, posterior views. Note separate scales for A-B, C, and D-E.
FIGURE 2. DMNH 2013-07-1942 in A revision of "Trinitichelys" maini (Testudinata: Baenidae) and additional material of its new genus from the Lewisville Formation (Woodbine Group, Cenomanian), Texas, USA
FIGURE 2. DMNH 2013-07-1942, Gehennachelys maini comb. nov. skull: A, dorsal photograph; B, dorsal line drawing; C, ventral photograph; D, ventral line drawing; E, right lateral photograph; F, right lateral line drawing; G, left lateral photograph; H, left lateral line drawing. Arrow indicates anterior orientation for A-D. For E and F, anterior is to the right. Abbreviations: ac= acromion; cm= condylus mandibularis; ct= cavum tympani; fr= frontal; fst= foramen stapediotemporale; ju= jugal; mx= maxilla; or= orbit; pa=parietal; po= postorbital; pm= premaxilla; pr= prootic; qj= quadratojugal; qu= quadrate; so= supraoccipital; sq= squamosal.
FIGURE 3. DMNH 2013-07-1942 in A revision of "Trinitichelys" maini (Testudinata: Baenidae) and additional material of its new genus from the Lewisville Formation (Woodbine Group, Cenomanian), Texas, USA
FIGURE 3. DMNH 2013-07-1942 carapace in A, dorsal, and B, ventral views. Plastron in C, dorsal, and D, ventral views. E corresponds with the red box in C, showing the left humerus, rotated 180°. Arrow indicates anterior orientation for A-D. Scale increments in mm for E.
FIGURE 5. DMNH 2013-07-1942 in A revision of "Trinitichelys" maini (Testudinata: Baenidae) and additional material of its new genus from the Lewisville Formation (Woodbine Group, Cenomanian), Texas, USA
FIGURE 5. DMNH 2013-07-1942 vertebrae. Cervical vertebrae in A, left lateral, B, anterior, and C, posterior views. Ventral view of indeterminate dorsal vertebrae in D, with anterior to the right.
FIGURE 1 in A revision of "Trinitichelys" maini (Testudinata: Baenidae) and additional material of its new genus from the Lewisville Formation (Woodbine Group, Cenomanian), Texas, USA
FIGURE 1. Location and geologic position of the Woodbine Group. A, General stratigraphic sequence and timescale for the Cretaceous of central and north central Texas showing the position of the Woodbine Group. Terrestrial deposits represented by stippled intervals. Time scale based on Gradstein et al. (2004) and Denne et al., 2016, and modified from Noto et al. (2022). B, Map of Woodbine surface exposures in the study area showing position of localities where fossils were discovered. Exposures are stippled, water bodies are solid gray. 1 = Arlington Archosaur Site, 2 = Grapevine Lake southwest shore.
FIGURE 9 in A revision of "Trinitichelys" maini (Testudinata: Baenidae) and additional material of its new genus from the Lewisville Formation (Woodbine Group, Cenomanian), Texas, USA
FIGURE 9. Plot of Plastron Length/Carapace Length by Anterior Plastral Lobe Length/Posterior Plastral Lobe Length for baenid taxa and Glyptops, which have associated carapaces and plastra. Proportions of Gehennachelys maini comb. nov. from HMNS-10-TM. Data on other taxa from Archibald (1977, table 57), Lyson and Joyce (2009a, b), Larson et al. (2013), Sullivan et al. (2013), Lively (2015), and Lyson et al. (2019). See Table 3 for raw data. Graph generated in Microsoft Excel. Grouping abbreviations: EUB= Eubaeninae; NEU= Neurankylus spp.; PLT= Palatobaeninae/ Plesiobaena grade. Squares indicate phylogenetically ungrouped taxa (non-baenodd baenids and Glyptops), circles indicate phylogenetically grouped taxa (Neurankylus and baenodds), and red square indicates Gehennachelys maini comb. nov.
FIGURE 8 in A revision of "Trinitichelys" maini (Testudinata: Baenidae) and additional material of its new genus from the Lewisville Formation (Woodbine Group, Cenomanian), Texas, USA
FIGURE 8. Gehennachelys maini comb. nov. shell reconstruction, based on DMNH 2013-07-0696, DMNH 2013-07- 0704, DMNH 2013-07-0712, DMNH 2013-07-0784, DMNH 2013-07-1703, DMNH 2013-07-1708, DMNH 2013-07- 1942, and HMNS-10-TM. Red lines indicate estimated sulci. Abbreviations: ab= abdominal scale, an= anal scale, ce= cervical scale, eg= extragular scale, fe= femoral scale, gu= gular scale, hu= humeral scale, im= inframarginal scale; ma= marginal scale, pec= pectoral scale, pl= pleural scale, ve= vertebral scale.
FIGURE 10 in A revision of "Trinitichelys" maini (Testudinata: Baenidae) and additional material of its new genus from the Lewisville Formation (Woodbine Group, Cenomanian), Texas, USA
FIGURE 10. Gehennachelys maini comb. nov. histological thin sections: A, DMNH 2013-07-1703, an indeterminate juvenile costal, and B, DMNH 2013-07-0588, a probably fourth costal. Scale bars equal 1 mm. C, closeup of vascularized external cortex and transition to cancellous bone, with growth marks indicated by blue arrowheads, D, internal cortex with intercalated vascular rows from DMNH 2013-07-0588, and E, sutural sockets of DMNH 2013-07-1703. Abbreviations: CB= cancellous bone, ECO= external cortex, ICO= internal cortex.
FIGURE 11 in A revision of "Trinitichelys" maini (Testudinata: Baenidae) and additional material of its new genus from the Lewisville Formation (Woodbine Group, Cenomanian), Texas, USA
FIGURE 11. Results of phylogenetic analyses for Gehennachelys maini comb. nov., produced from the modified matrix Rollot et al. (2022b), with 170 minimum trees and 367 steps (CI= 0.35; RI= 0.71): A) Consensus 50% majorityrule phylogenetic tree of Baenidae; B) Strict consensus tree. Yellow stars indicate Gehennachelys maini comb. nov.
FIGURE A2 in Eocene (Duchesnean and earliest Chadronian) brontotheres (Brontotheriidae), Protitanops curryi and cf. Parvicornus occidentalis, from West Texas and Mexico
FIGURE A2. Reduced strict consensus tree for Brontotheriidae based on a parsimony search with equally weighted characters with wildcard taxa pruned a posteriori.
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Allen Brain Atlas
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