. Bulletin of the British Museum (Natural History), Geology. . 0-125mm J Fig. i8a-c. Procytherura aerodynamica sp. nov. a, b. Anterior duplicature with vestibule and marginal pore canals and posterior duplicature, male right valve, paratype c. Muscle scars, female right valve, paratype 12, 13). The juveniles possess the fine puncta only. Hinge holoperatodont; median element long, smooth and expanded at both ends. Duplicature broad with large anterior vestibule. No posterior vestibule present. Marginal pore canals straight, few in number. Anterior with narrow flange (Text-fig.
. Bulletin of the British Museum (Natural History), Geology. . 0-125mm J Fig. i8a-c. Procytherura aerodynamica sp. nov. a, b. Anterior duplicature with vestibule and marginal pore canals and posterior duplicature, male right valve, paratype c. Muscle scars, female right valve, paratype 12, 13). The juveniles possess the fine puncta only. Hinge holoperatodont; median element long, smooth and expanded at both ends. Duplicature broad with large anterior vestibule. No posterior vestibule present. Marginal pore canals straight, few in number. Anterior with narrow flange (Text-fig. 18a). Muscle scars consist of four oval, rather elongate adductor scars with a large heart-shaped frontal scar. Dimensions. Holotype, , male carapace (PI. n, fig. 7), length 0-54 mm ; height 0-27 mm ; width 0-21 mm. Paratypes : , female carapace (PL 11, fig. 8), length 0-50 mm ; height 0-26 mm ; width 0-22 mm. , female right valve (PL n, fig. 13), length 0-50 mm ; height 0-26 mm. , male carapace (PL 12, fig. 2), length 0-56 mm ; height 0-27 mm ; width 0-21 mm. , juvenile carapace (PL 12, fig. 3), length 0-46 mm ; height 0-24 mm ; width 0-18 mm. , female right valve (PL n, fig. 15), length 0-49 mm ; height 0-26 mm. , male left valve (PL n, fig. 14), length 0-54 mm ; height 0-27 mm. , female left valve (PL 12, fig. 1), length 0-46 mm ; height 0-24 mm. , juvenile right valve (PL n, fig. 9), length 0-42 mm ; height 0-24 mm. , juvenile right valve (PL 11, figs 10, 16), length 0-44 mm ; height 0-23 mm. , male right valve (PL 11, fig. 12), length 0-51 mm ; height 0-24 mm. , juvenile left valve (PL 11, fig. n), length 0-47 mm ; height 0-22 mm. Discussion. Procytherura aerodynamica sp. nov. differs from European species of the genus by lacking the lateral ridges or reticulation found in all species so far. Please note that these images are extracted from scanned page images that may have been digitally
Size: 1593px × 1569px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorbritishmuseumnaturalhistory, bookcentury1900, bookcoll
