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12 results for “Theria”
Fig. 7. Theria incertae sedis. A. Left p1 in New Late Cretaceous mammals from the Intertrappean beds of Rangapur, India and paleobiogeographic framework
Fig. 7. Theria incertae sedis. A. Left p1 or p2 (ITV/R/Mm−14) in labial view. B. Right p1 (ITV/R/Mm−17) in labial view. C. Right p3 or p4 (ITV/R/Mm−13) in lingual view. D. Right P3 (ITV/R/Mm−5) in labial (D1) and occlusal (D2, D3) views. Scale bar 0.5 mm.
Figure 7 in Horolodectidae: a new family of unusual eutherians (Mammalia: Theria) from the Palaeocene of Alberta, Canada
Figure 7. Ferrequitherium sweeti gen. et sp. nov. from the Trainspotting locality, and Horolodectes sunae from the DW-2 locality, Palaeocene Paskapoo Formation of Alberta, Canada. A–B, Ferrequitherium sweeti gen. et sp. nov. TMP 2017.025.0317, incomplete left maxilla with P4, M1–2 in occlusal view (A). TMP 2015.069.0488, left M3 in occlusal view (B). (C), Horolodectes sunae, composite upper left dentition [including UALVP 42073, incomplete left maxilla with P2–4, UALVP 42074 (reversed from original), incomplete right maxilla with M1–2, and UALVP 45719 (reversed from original), right M3 (reversed from original)] in occlusal view. D–F, Ferrequitherium sweeti gen. et sp. nov. TMP 2013.048.0075 (holotype), incomplete left dentary with p3–4, m1–3 in labial (D), lingual (E) and dorsolabial (F) views. G–I, Horolodectes sunae. UALVP 45713, incomplete left dentary with p2–4, m1–3 in labial (G), lingual (H) and dorsolabial (I) views. Scale bar = 2 mm. Specimens of Ferrequitherium sweeti gen. et sp. nov. have been enlarged to approximately the same size as those of Horolodectes sunae.
Figure 9 in Horolodectidae: a new family of unusual eutherians (Mammalia: Theria) from the Palaeocene of Alberta, Canada
Figure 9. Phylogenetic relationships of Ferrequitherium sweeti gen. et sp. nov. from the Palaeocene Paskapoo Formation of south-western Alberta, Canada. A, strict consensus of five MPTs of 432 steps (CI = 0.6366; RI = 0.4696; RC = 0.2989), Maelestes gobiensis outgroup, Zhelestidae included. B, strict consensus of four MPTs of 402 steps (CI = 0.6542; RI = 0.4908; RC = 0.3211), Maelestes gobiensis outgroup, Zhelestidae excluded. C, strict consensus of four MPTs of 455 steps (CI = 0.6044; RI = 0.5174; RC = 0.3127), Prokennalestes, Kennalestes, Maelestes outgroups, Zhelestidae included. Bremer values greater than one appear above line, bootstrap values greater than 50% appear below line.
Figure 4 in Horolodectidae: a new family of unusual eutherians (Mammalia: Theria) from the Palaeocene of Alberta, Canada
Figure 4. Ferrequitherium sweeti gen. et sp. nov. from the Palaeocene Paskapoo Formation of south-western Alberta, Canada. A–D, TMP 2013.048.0075 (holotype, Trainspotting locality), incomplete left dentary with p3–4, m1–3 in labial (A), lingual (B), occlusal (C) and dorsolabial (D) views. E–G, TMP 2015.069.0039 (Trainspotting locality), incomplete left dentary with p3–4 and alveoli for p1–2 in labial (E), lingual (F) and occlusal (G) views. H–J, TMP 2015.070.0110 (C = Cochrane 1 locality), incomplete left dentary with p4, posterior alveolus for p2, and alveoli for p3 and m1 (dentary fragment with m2–3 not figured) in labial (H), lingual (I) and occlusal (J) views. Scale bar = 2 mm.
Figure 5 in Horolodectidae: a new family of unusual eutherians (Mammalia: Theria) from the Palaeocene of Alberta, Canada
Figure 5. Ferrequitherium sweeti gen. et sp. nov. from the Palaeocene Paskapoo Formation of south-western Alberta, Canada. A–D, TMP 2014.023.0096 (C = Cochrane 1 locality), incomplete right dentary with m1–3 and alveoli for p4 in labial (A), lingual (B), occlusal (C) and dorsolabial (D) views. E–G, TMP 2013.011.0404 (C = Cochrane 1 locality), incomplete left dentary with m1–3 in labial (E), lingual (F) and occlusal (G) views. Scale bar = 2 mm.
Figure 6 in Horolodectidae: a new family of unusual eutherians (Mammalia: Theria) from the Palaeocene of Alberta, Canada
Figure 6. Ferrequitherium sweeti gen. et sp. nov. from the Palaeocene Paskapoo Formation of south-western Alberta, Canada. A–C, TMP 2015.069.1134 (Trainspotting locality), left p2 in labial (A), lingual (B) and occlusal (C) views. D–F, TMP 2015.069.0855 (Trainspotting locality), left p3 in labial (D), lingual (E) and occlusal (F) views. G–I, TMP 2014.047.0191 (Trainspotting locality), left p4 in labial (G), lingual (H) and occlusal (I) views. J–L, TMP 2017.025.0184 (Trainspotting locality), left dp4 in labial (J), lingual (K) and occlusal (L) views. M–O, TMP 2013.048.0043 (Trainspotting locality), left m1 in labial (M), lingual (N) and occlusal O views. (P–R), TMP 2015.069.0010 (Trainspotting locality), right m2 in labial P, lingual Q and occlusal R views. (S–U), TMP 2015.069.0768 (Trainspotting locality), left m3 in labial S, lingual T and occlusal U views. (V–X), TMP 2016.039.0047 (Trainspotting locality), right m3 in labial V, lingual W and occlusal X views. Scale bar = 2 mm.
Figure 2 in Horolodectidae: a new family of unusual eutherians (Mammalia: Theria) from the Palaeocene of Alberta, Canada
Figure 2. Ferrequitherium sweeti gen. et sp. nov. from the Palaeocene Paskapoo Formation of south-western Alberta, Canada. A–E, TMP 2015.069.0283 (Trainspotting locality), right P4 in labial (A), lingual (B), anterior (C), posterior (D) and occlusal views (E). F–H, TMP 2017.025.0317 (Trainspotting locality), incomplete left maxilla with P4, M1–2 in labial (F), lingual (G) and occlusal (H) views. Scale bar = 2 mm.
Figure 8 in Horolodectidae: a new family of unusual eutherians (Mammalia: Theria) from the Palaeocene of Alberta, Canada
Figure 8. Phylogenetic relationships of Ferrequitherium sweeti gen. et sp. nov. from the Palaeocene Paskapoo Formation of south-western Alberta, Canada. A, strict consensus of two most parsimonious trees (MPTs) of 430 steps (CI = 0.6349; RI = 0.4784; RC = 0.3037), Prokennalestes trofimovi outgroup. B, single MPT of 429 steps (CI = 0.6364; RI = 0.4747; RC = 0.3021), Kennalestes gobiensis outgroup, Zhelestidae included. C, strict consensus of eight MPTs of 403 steps (CI = 0.6501; RI = 0.4835; RC = 0.3143), Kennalestes gobiensis outgroup, Zhelestidae excluded. Bremer values greater than one appear above line, bootstrap values greater than 50% appear below line.
Figure 1 in Horolodectidae: a new family of unusual eutherians (Mammalia: Theria) from the Palaeocene of Alberta, Canada
Figure 1. Generalized map of Alberta, Canada. Letters indicate the localities where specimens of Ferrequitherium sweeti gen. et sp. nov. (A, B) and Horolodectes sunae (C, D) discussed in the text have been discovered. A, Trainspotting locality (Late Palaeocene, Ti1); B, Cochrane 1 locality (Late Palaeocene, Ti1); C, DW-2 locality (Late Palaeocene, Ti3); D, Birchwood locality (Late Palaeocene, Ti3). All localities occur in the Palaeocene Paskapoo Formation.
Data from: Functional morphological adaptations of the bony labyrinth in marsupials (Mammalia, Theria)
Diprotodontia represents the largest and ecologically most distinct order of marsupials occurring in Australasian being highly divers in size, locomotion, habitat preferences, feeding, and activity pattern. The spatial orientation in the habitat and therefore the three-dimensional space is detected by the vestibular system of the inner ear, more precisely by the three semicircular canals. In this study, we investigated the bony labyrinth of diprotodontian and selected non-diprotodontian marsupial mammals of almost all genera with noninvasive micro-CT scanning and 3D-reconstructions. In principal component analyses, the subterranean taxon can be separated from gliding and saltatorial taxa, whereas arboreal species can be separated from saltatorial specimens. The highest PCA loadings of this functional distinction are clearly found in the diameter of the semicircular canals, whereas the overall shape (height, width, length) of the semicircular canals is less important. Additionally, the investigated arboreal and fossorial species of South America are nested in the morphospace of the Australasian taxa. Even if a phylogenetic signal in the anatomy of the bony labyrinth cannot be excluded entirely, the main functional morphological signal of the vestibular system is found in the diameter of the semicircular canals. With the large dataset of extant marsupial mammals analysed here, the locomotion mode of extinct taxa can be inferred in future studies independent of any evidence of postcranial material.
Data from: Functional morphological adaptations of the bony labyrinth in marsupials (Mammalia, Theria)
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Figure 3 in Horolodectidae: a new family of unusual eutherians (Mammalia: Theria) from the Palaeocene of Alberta, Canada
Figure 3. Ferrequitherium sweeti gen. et sp. nov. from the Palaeocene Paskapoo Formation of south-western Alberta, Canada. A–E, TMP 2015.069.1088 (Trainspotting locality), left M1 in labial (A), lingual (B), anterior (C), posterior (D) and occlusal (E) views. F–J, TMP 2014.023.0011 (Cochrane 1 locality), right M2 in labial (F), lingual (G), anterior (H), posterior I and occlusal J) views. K–O, TMP 2015.069.0488 (Trainspotting locality), left M3 in labial (K), lingual (L), anterior (M), posterior (N) and occlusal (O) views. P–T, TMP 2015.069.1131 (Trainspotting locality), right M3 in labial (P), lingual (Q), anterior (R), posterior (S) and occlusal (T) views. Scale bar = 2 mm.
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