. Bulletin of the British Museum (Natural History), Geology. 1mm I 1 Fig. 48 Camera lucida drawing of phyllode pore arrangement and ambulacral plating in Catopygus columbarius () from the Lower Cenomanian of Wilmington. The edge of the peristome is to the bottom. PERISTOME. The peristome is small and weakly sunken and is surrounded by a prominent floscelle. In length the peristome is only 8-12% of the test length (mean = 9%; SD = 10; N = 37). At 5-6 mm length the peristome is circular in outline, at 9 mm length it is pentagonal and between 14 and 30 mm length the peristome is slightly w
. Bulletin of the British Museum (Natural History), Geology. 1mm I 1 Fig. 48 Camera lucida drawing of phyllode pore arrangement and ambulacral plating in Catopygus columbarius () from the Lower Cenomanian of Wilmington. The edge of the peristome is to the bottom. PERISTOME. The peristome is small and weakly sunken and is surrounded by a prominent floscelle. In length the peristome is only 8-12% of the test length (mean = 9%; SD = 10; N = 37). At 5-6 mm length the peristome is circular in outline, at 9 mm length it is pentagonal and between 14 and 30 mm length the peristome is slightly wider than long. The peristome lies anterior of the midline, 34-43% of the length from the anterior (mean = 38%; SD = 2-6; N = 40).. 1 mm i 1 Fig. 49 Camera lucida drawing of oral plating in Catopygus columbarius () from the Lower Cenomanian of Wilmington. Peristome to the base. Plate 26 Catopygus columbarius (Lamarck) Figs 1, 4 : 1, apical; 4, posterior. Lower Cenomanian, White Hart sand pit, Wilmington, Devon (x 4). Figs 2, 3 : 2, oral; 3, lateral. As last ( x 3).. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original British Museum (Natural History). London : BM(NH)
Size: 2002px × 1248px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorbritishmuseumnaturalhistory, bookcentury1900, bookcoll
