. Carnegie Institution of Washington publication. MORPHOLOGICAL REVISION "3 Genus ZATRACHYS Cope (page 47). Characteristic specimens: Nos. 4586, 4587, 4589 Am. Mus. Nat. Hist. Cope Coll. The genus is known only from the skull, and but a single species, Z. serratus, is identifiable. Cope, in 1884 (I, 18), remarked of this genus: "Rugosities project in the form of teeth along the external alveolar border. Individuals with sculptured neural spines and dermal bones are referred ; This is right with regard to the serrated edges of the skull, but there is no warrant for associati
. Carnegie Institution of Washington publication. MORPHOLOGICAL REVISION "3 Genus ZATRACHYS Cope (page 47). Characteristic specimens: Nos. 4586, 4587, 4589 Am. Mus. Nat. Hist. Cope Coll. The genus is known only from the skull, and but a single species, Z. serratus, is identifiable. Cope, in 1884 (I, 18), remarked of this genus: "Rugosities project in the form of teeth along the external alveolar border. Individuals with sculptured neural spines and dermal bones are referred ; This is right with regard to the serrated edges of the skull, but there is no warrant for associating the forms having sculptured and expanded neural spines, such as Z. apicalis Cope, with the skulls called Z. serratus and Z. micropthalmus; the expanded and sculptured spines are associated, in Aspi- dosaurus, with a skull like D E Fig. 43. A. Z. serratus. Lower view of posterior portion of skull, showing fine teeth on parasphenoid and pterygoid. No. 4589 Am. Mus. B. Same No. 4587 Am. Mus. Xi Diagram of skull, showing sutures. Lettering as usual. C. Zatrachys sp. No. 4584 Am. Mus. X K- Posterior view of humerus of left side. D. Zatrachys sp. No. 4560 Am. Mus. X K- Right scapula from outer side. E. Same from inner side. The type specimens were described by Cope without having been cleaned; a little care has removed most of the matrix from two of the skulls and it is possible to give a more accurate account of them. They are longer than wide and very flat in the facial region; the orbital and post- orbital portion is more elevated. The posterior edge of the skull and the sides, as far forward as the nares, are ornamented by sharp, thin projections, which are larger and more prominent posteriorly. Probably associated with this specialization is the peculiar character of the sutures. The sur- face of the bones has been largely destroyed, but enough remains to show that there was a reticulate sculpture and a strong radial structure; the edges of the bones are draw
Size: 2192px × 1140px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorcarnegie, bookcentury1900, bookdecade1910, bookyear1911
