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11 results for “Perplexicervix”
FIGURE 9 in On the "screamer-like" birds from the British London Clay: An archaic anseriform-galliform mosaic and a non-galloanserine "barb-necked" species of Perplexicervix
FIGURE 9. Comparison of selected skeletal elements of Perplexicervix paucituberculata, sp. nov. and Eupodotis senegalensis (Otidiformes) to illustrate similar proportions and morphologies. A‒C, E. senegalensis (SMF 21520), first three cervical vertebrae (A), left coracoid (B), and right humerus (C). D‒G, P. paucituberculata, sp. nov., first three cervical vertebrae (D), left coracoid (E), and proximal and distal ends of right humerus (F, G) (D: holotype, NMS.Z.2021.40.7; E, F: tentatively referred specimen NMS.Z.2021.40.91; G: tentatively referred specimen NMS.Z.2021.40.92). Abbreviations: cbp, crista bicipitalis; cdd, condylus dorsalis; cdv, condylus ventralis; cph, caput humeri; ppc, processus procoracoideus. The scale bars equal 10 mm.
FIGURE 1 in On the "screamer-like" birds from the British London Clay: An archaic anseriform-galliform mosaic and a non-galloanserine "barb-necked" species of Perplexicervix
FIGURE 1. Overview of the main bones preserved in the specimens of Danielsavis nazensis Houde et al., 2023 from the London Clay of Walton-on-the-Naze (Essex, UK). A, holotype, NMS.Z.2021.40.1 (not shown are the radii, which were figured by Houde et al., 2023: figure 5Q, R). B, referred specimen NMS.Z.2021.40.2 (the two separate blocks of matrix containing the beak and the neurocranium, respectively, were assembled for the photo; not shown is the cranial portion of the sternum, which was figured by Houde et al., 2023: figure 7E, F). C, referred specimen NMS.Z.2021.40.3. D, referred specimen NMS.Z.2021.40.6. Abbreviations: for, foramen piercing skull roof; wdn, widening of scapus claviculae. The scale bars equal 10 mm.
FIGURE 4 in On the "screamer-like" birds from the British London Clay: An archaic anseriform-galliform mosaic and a non-galloanserine "barb-necked" species of Perplexicervix
FIGURE 4. Danielsavis nazensis Houde et al., 2023, comparison of the vertebrae with those of other galloanserine birds. A, D. nazensis, cranialmost five cervical vertebrae (atlas: NMS.Z.2021.40.1; axis, third, and fourth vertebra: NMS.Z.2021.40.2; fifth vertebra: NMS.Z.2021.40.3). B‒D, cranialmost five cervical vertebrae of B, Chauna torquata (Anhimidae, Anseriformes; SMF 11885); C, Dendrocygna arborea (Anatidae, Anseriformes; SMF 6591); D, Alectura lathami (Megapodiidae, Galliformes; SMF 7243). E, D. nazensis, selected cervical and thoracic vertebrae of the holotype (NMS.Z.2021.40.1); the arrows denote enlarged details of the bones to show irregular lamellate projections. F‒I, axis in lateral view of F, D. nazensis (NMS.Z.2021.40.2); G, C. torquata (SMF 11885); H, D. arborea (SMF 6591); I, A. lathami (SMF 7243). J, D. nazensis, fourth cervical vertebra of the holotype (NMS.Z.2021.40.1) in dorsal and lateral view. K, D. nazensis, fourth cervical vertebra of the referred specimen NMS.Z.2021.40.2 in dorsal and lateral view. L, D. nazensis, thoracic vertebra in lateral view (NMS.Z.2021.40.3). Abbreviations: dns, dens; for, foramen; ftv, foramen transversarium; ntc, notch; ote, ossified tendons; pno, pneumatic opening; ptr, processus transversus; pvt, processus ventralis; zcd, zygapophysis caudalis; zcr, zygapophysis cranialis. The scale bars equal 5 mm.
FIGURE 11 in On the "screamer-like" birds from the British London Clay: An archaic anseriform-galliform mosaic and a non-galloanserine "barb-necked" species of Perplexicervix
FIGURE 11. Results of the analysis of the emended dataset 1 of Houde et al. (2023). A, strict consensus tree of three most parsimonious trees (length = 317, consistency index = 0.69, retention index = 0.50). B, majority rule consensus tree with values indicating the percentage of trees in which the respective node is retained.
FIGURE 3 in On the "screamer-like" birds from the British London Clay: An archaic anseriform-galliform mosaic and a non-galloanserine "barb-necked" species of Perplexicervix
FIGURE 3. Cranial elements and hyoid bone of Danielsavis nazensis Houde et al., 2023 in comparison with those of other galloanserine birds. A‒F, D. nazensis (holotype, NMS.Z.2021.40.1), right (A‒D) and left (E, F) quadrate in lateral (A, E), caudal (B), medial (C, F), and ventral (D) view. G, H, D. nazensis (NMS.Z.2021.40.2), left (G) and right (H) quadrate in lateral view. I, J, right quadrate of Pipile jacutinga (Cracidae, Galliformes; SMF 4139) in lateral (I) and medial (J) view. K, L, mirrored left quadrate of Anseranas semipalmata (Anseranatidae, Anseriformes; SMF 11276) in lateral (K) and medial (L) view. M, N, Anachronornis anhimops from the late Paleocene of Wyoming (holotype, coated with ammonium chloride; from Houde et al., 2023: figure 1, published under a CC BY 4.0 license), left quadrate in lateral (M) and medial (N) view. O‒R, D. nazensis (holotype, NMS.Z.2021.40.1), right (O, P) and left (Q, R) pterygoid in dorsal (O, Q) and medial (P, R) view. S, D. nazensis (NMS.Z.2021.40.2), basiurohyal in dorsal view. T, U, D. nazensis (holotype, NMS.Z.2021.40.1), basiurohyal and putative paraglossum in lateral (T) and dorsal (U) view. V, Alectura lathami (Megapodiidae, Galliformes; SMF 19785), basiurohyal and paraglossum in dorsal view. W, Chauna torquata (Anhimidae, Anseriformes; SMF 19920), basiurohyal and paraglossum in dorsal view; the arrow denotes an enlarged detail of the basihyal. X, A. semipalmata (SMF 19902), basiurohyal and paraglossum in dorsal view; the arrow denotes an enlarged detail of the basihyal. Abbreviations: arf, articular facet for pterygoid; bsh, os basihyale; cbr, os ceratobranchiale; cdl, condylus lateralis; cdm, condylus medialis; cdp, condylus pterygoideus; cpo, capitulum oticum; cps, capitulum squamosum; cqj, cotyla quadratojugalis; fab, facies articularis basipterygoidea; fpb, foramen pneumaticum basiorbitale; fpc, foramen pneumaticum caudomediale; fqv, facies quadratojugalis ventralis; orb, processus orbitalis; pgl, os paraglossum; tsc, tuberculum subcapitulare; urh, os urohyale. The scale bars equal 5 mm.
FIGURE 7 in On the "screamer-like" birds from the British London Clay: An archaic anseriform-galliform mosaic and a non-galloanserine "barb-necked" species of Perplexicervix
FIGURE 7. Specimens of Perplexicervix paucituberculata, sp. nov. and Perplexicervix sp. from the early Eocene London Clay of Walton-on-the-Naze (Essex, UK). A, P. paucituberculata, sp. nov. (holotype, NMS.Z.2021.40.7). B, cf. P. paucituberculata, sp. nov. (NMS.Z.2021.40.91). C, cf. P. paucituberculata, sp. nov. (NMS.Z.2021.40.92). D, Perplexicervix sp. (NMS.Z.2021.40.9). E, Perplexicervix sp. (NMS.Z.2021.40.10). Abbreviation: for, foramen perforating caudoventral portion of corpus pygostyli. The scale bars equal 10 mm.
FIGURE 10 in On the "screamer-like" birds from the British London Clay: An archaic anseriform-galliform mosaic and a non-galloanserine "barb-necked" species of Perplexicervix
FIGURE 10. Undetermined birds that were likened to Danielsavis by Houde et al. (2023). A, partial skeleton of Aves indet. A (NMS.Z.2021.40.5). B, C, left tarsometatarsus of Aves indet. A (NMS.Z.2021.40.8) in plantar (B) and dorsal (C) view. D, partial skeleton of Aves indet. B (NMS.Z.2021.40.4). E‒H, right quadrate of Aves indet. A (NMS.Z.2021.40.5) in lateral (E), caudal (F), medial (G), and ventral (H) view. I, J, right pterygoid of Aves indet. B (NMS.Z.2021.40.4) in lateral (I) and dorsal (J) view. K, distal end of right tarsometatarsus of Aves indet. B (NMS.Z.2021.40.4) in distal view. L, distal end of left tarsometatarsus of Aves indet. A (NMS.Z.2021.40.8) in distal view. M, proximal end of left tarsometatarsus of Aves indet. A (NMS.Z.2021.40.8) in proximal view. Abbreviations: cdc, condylus caudalis; cdm, condylus medialis; cdp, condylus pterygoideus; cpo, capitulum oticum; cps, capitulum squamosum; for, foramen; orb, processus orbitalis; tsc, tuberculum subcapitulare. The scale bars equal 10 mm.
FIGURE 6 in On the "screamer-like" birds from the British London Clay: An archaic anseriform-galliform mosaic and a non-galloanserine "barb-necked" species of Perplexicervix
FIGURE 6. Danielsavis nazensis Houde et al., 2023, comparison of tibiotarsus, tarsometatarsus, pedal phalanges with other galloanserine birds. A, D. nazensis (holotype, NMS.Z.2021.40.1), distal end of right tibiotarsus; the arrow denotes an enlarged detail of the bone. B, distal end of right tibiotarsus of the anseriform Saintandrea chenoides from the late Oligocene of France (holotype, NMB Mar. 874e). C, mirrored distal end of left tibiotarsus of an unnamed galliform from the early Eocene of Egem in Belgium (IRSNB Av 168); coated with ammonium chloride. D‒G, D. nazensis (holotype, NMS.Z.2021.40.1), right tarsometatarsus in distal (D), proximal (E), dorsal (F), and plantar (G) view; the arrow denotes an enlarged detail of the proximal end of the bone. H, I, D. nazensis (NMS.Z.2021.40.3), proximal end of right tarsometatarsus in proximal (H) and plantar (I) view. J, D. nazensis (NMS.Z.2021.40.3), distal end of right tarsometatarsus in plantar view; the arrow denotes an enlarged detail of the bone. K, D. nazensis (holotype, NMS.Z.2021.40.1), non-ungual pedal phalanges; the asterisk indicates a mirrored phalanx. L, mirrored left foot of Chauna torquata (Anhimidae, Anseriformes; SMF 19920). M, right foot of Pavo cristatus (Phasianidae, Galliformes; SMF 20342). N, mirrored distal end of left tarsometatarsus of Anachronornis anhimops (holotype, coated with ammonium chloride; from Houde et al., 2023: figure 2, published under a CC BY 4.0 license) in plantar view. The dotted lines in A‒C indicate the midline of the distal tibiotarsus. The arrows in K‒M denote the length of the third phalanx of the fourth toe. Abbreviations: cdl, condylus lateralis; cdm, condylus medialis; cmh, crista medialis hypotarsi; ext, sulcus extensorius; fdl, sulcus for musculus flexor digitorum longus; fhl, sulcus for musculus flexor hallucis longus; ltr, lateral rim of plantar articular surface of trochlea metatarsi III; mdr, medial rim of plantar articular surface of trochlea metatarsi III; pst, pons supratendineus. The scale bars equal 10 mm.
FIGURE 5 in On the "screamer-like" birds from the British London Clay: An archaic anseriform-galliform mosaic and a non-galloanserine "barb-necked" species of Perplexicervix
FIGURE 5 (caption on next page).
FIGURE 8 in On the "screamer-like" birds from the British London Clay: An archaic anseriform-galliform mosaic and a non-galloanserine "barb-necked" species of Perplexicervix
FIGURE 8 (caption on next page).
FIGURE 2 in On the "screamer-like" birds from the British London Clay: An archaic anseriform-galliform mosaic and a non-galloanserine "barb-necked" species of Perplexicervix
FIGURE 2 (caption on next page).
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