. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. 10 mm Figure 13. Prozostrodon brasiliensis, new genus. (A) Cervical centrum in dorsal view. (B) Anterior dorsal vertebra in lateral view. (C, D, E) Lateral views of three neural arcties from the dorsal series. (F) Incomplete ribs. Abbreviations: DP, diapophysis; ?DP, ?diapophysis; NP, contact for neural pedicle; NSP, neural spine; PP, parapophysis; PRZ, prezygapophysis; PZ, postzy- gapophysis; PRZP, prezygapophysial process. Stage of eruption). Seven small cusps form jected dorsolaterally, the neural canal the lingual
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. 10 mm Figure 13. Prozostrodon brasiliensis, new genus. (A) Cervical centrum in dorsal view. (B) Anterior dorsal vertebra in lateral view. (C, D, E) Lateral views of three neural arcties from the dorsal series. (F) Incomplete ribs. Abbreviations: DP, diapophysis; ?DP, ?diapophysis; NP, contact for neural pedicle; NSP, neural spine; PP, parapophysis; PRZ, prezygapophysis; PZ, postzy- gapophysis; PRZP, prezygapophysial process. Stage of eruption). Seven small cusps form jected dorsolaterally, the neural canal the lingual cingulum. The degree of incip- ient root bifurcation is greater than in pre- ceding postcanines, representing a mor- phological gradient that is also expressed in the increasing complexity of the cingula. The right Pc^o is unei"upted; cusp a and would have been relatively wide. The par- apophyseal facets are located entirely on the anteroventral margin of the centnjm; there is no indication that rib heads spanned adjacent vertebrae. A nearly complete anterior dorsal ver- part of c are exposed just below the groove tebra (Fig. 13B) exliibits a parapophysis on for the dental lamina. The left Pci,, is just the dorsolateral region of the centrum, a beginning to eiaipt; the position of this large diapophysis that projects laterally tooth distal to the end of the alveolar row from the middle of the pedicle, and a neu- is evidence that the individual was still ral spine that is directed posterodorsally growing. The centrrmi is moderately amphicoelous. Postcraniiim. One centrum (Fig. 13A) is The neural canal is large but narrower tentatively considered to be cervical be- than the centnnn, differing in this respect cause it is transversely wide and antero- from Therioherpeton (and possibly reflec- posteriorly short, as are the cervicals of Therioherpeton. The facets for the pedi- cles of the neural arch are in a dorsolateral position; if the pedicles were to have pro- tive of the
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