. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 25 a,b c-d e. 10 mm FIGURE 7. Variation in spicule morphology of Prochaetoderma yongei n. sp. from the North American Basin. A-C. spicules from junction of trunk and posterium, unless indicated otherwise; A. from single specimen from 805 m (CH-88 Sta. 207); B. from 3 specimens from 1470 m (type locality); C. from single specimen from 530 m (CH-58 Sta. 105); D. spicules from paratype no. 4, figured just below, immature specimen (type locality); E. spicules from paratype no. 3 figured at lower right, a short, stubby specimen f
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 25 a,b c-d e. 10 mm FIGURE 7. Variation in spicule morphology of Prochaetoderma yongei n. sp. from the North American Basin. A-C. spicules from junction of trunk and posterium, unless indicated otherwise; A. from single specimen from 805 m (CH-88 Sta. 207); B. from 3 specimens from 1470 m (type locality); C. from single specimen from 530 m (CH-58 Sta. 105); D. spicules from paratype no. 4, figured just below, immature specimen (type locality); E. spicules from paratype no. 3 figured at lower right, a short, stubby specimen from 805 m (CH-88 Sta. 207). blade are straight in P. raditlijerum and convex in P. yongei; the base in P. raduliferum is round, and in P. yongei it is flared proximally. Radula and jaws. The jaws and teeth are typical for the family and small (Fig. 14 y'-y3). Tooth length ranges up to 90 /urn; jaw length and width range up to 365 and 128 yum, respectively. The entire radula has 8 to 11 rows of teeth. The central radula plate is short, up to 26 ^m, and broad, up to 8 /urn; the ends are directed posteriorly. Morphological variation Several populations of Prochaetoderma yongei, identified by similarity of spicule and radula morphology, were examined to determine the variability that occurs within this species and could therefore be expected in other species of the family Prochae- todermatidae. Spicules. Several spicules from the dorsal junction of trunk and posterium were drawn and compared for 24 specimens from four stations along the Gay Head-Bermuda transect in the North American Basin and from five stations between the northern. 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 Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lil
Size: 1825px × 1369px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
