. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. Bulletin Museum of Comparative Zoology, Vol. 147, No. 11. Figure 9. Dorsal view of MCZ 139551, hatchling of C. siebenrocki. a 37 mm light yellowish brown. Soft skin in axillary and inguinal pockets and at base of tail white to light yellowish brown to very light brown. Carapace. Coloration of dorsal surface of carapace uniform dark brown to black. Coloration of ventral surfaces same color as plastron. Dorsal surface of carapace in hatchlings with fine black spots scattered on dark ground color (Fig. 9). Plastron. Colo
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. Bulletin Museum of Comparative Zoology, Vol. 147, No. 11. Figure 9. Dorsal view of MCZ 139551, hatchling of C. siebenrocki. a 37 mm light yellowish brown. Soft skin in axillary and inguinal pockets and at base of tail white to light yellowish brown to very light brown. Carapace. Coloration of dorsal surface of carapace uniform dark brown to black. Coloration of ventral surfaces same color as plastron. Dorsal surface of carapace in hatchlings with fine black spots scattered on dark ground color (Fig. 9). Plastron. Coloration of plastron uniform light to dark cream or tan; sometimes sutures between scutes finely outlined in dark brown. Size. Goode (1967) states that C. sie- benrocki can reach at least 300 mm in cara- pace length, and Cogger (1972) gives 3S0 mm as a maximum. Males and females reach approximately the same size; the largest male examined by us was 263 mm, the largest female 273 mm. Sexual dimorphism. Adult males are dis- tinguished from adult females by tail size and shell height. Adult males have a tail which is considerably longer and thicker than that ol females. In our specimens, this difference is apparent only in animals with a carapace length of 150 mm or more, though Bergmans (1966) states that males reach sexual maturity at about 125 mm and females at about 150 mm. Shell height can be used to distinguish males and fe- males over 175 mm in carapace length. Males have a relativelv flatter shell than females, with the length:height ratio greater than In females, the ratio is less than The flatter shell is not due to plastral concavity in male C. siebenrocki. No sexual dimorphism is noticeable in shape or depth of anal notch or width of head. OSTEOLOGY Skull. Skull moderately elongate, length averaging times tympanic width and times maxillary width; markedly flat- tened, with length averaging times height, and maxillary width averaging times
Size: 1602px × 1559px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorharvarduniversity, bookcentury1900, booksubjectzoology
