. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. LAQUEUS DEVELOPMENT 251. Figure 4. Larvae of Laqueus culifornianus. (A) Dorsal view of 96-h-old early larva. Apical lobe ('AL') uniformly ciliated except for prominent apical tuft ('AT'), mantle lobe ('ML') unciliated with short dorsal setal bundles and the left ventrolateral bundle visible, and pedicle lobe ('PL') rounded and ciliated. Scale bar. 50 /j,m. (B) Dorsal view of 128-h-old larva. Band of locomotory cilia differentiating on margins of apical lobe; the balls at tips of many cilia are probably fixation artifacts. Ap
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. LAQUEUS DEVELOPMENT 251. Figure 4. Larvae of Laqueus culifornianus. (A) Dorsal view of 96-h-old early larva. Apical lobe ('AL') uniformly ciliated except for prominent apical tuft ('AT'), mantle lobe ('ML') unciliated with short dorsal setal bundles and the left ventrolateral bundle visible, and pedicle lobe ('PL') rounded and ciliated. Scale bar. 50 /j,m. (B) Dorsal view of 128-h-old larva. Band of locomotory cilia differentiating on margins of apical lobe; the balls at tips of many cilia are probably fixation artifacts. Apical tuft cilia are present at this stage but not preserved on this specimen. Setae of mantle lobe erected, as when swimming larva is disturbed. Pedicle lobe has lost its cilia but is still rounded. Scale as in A. (C) Posterior view of 4-day-old early larva as in A. Pedicle lobe rounded and sparsely ciliated, ventrolateral CVLS') and dorsal CDS') setal bundles pairs on mantle lobe, and cilia on apical lobe. Scale as in A. (D) Lateral view of 168-h-old metamorphically competent larva. Locomotory ciliated band CLCB') on apical lobe; the apical tuft of cilia is absent in competent larvae. Ventral ciliated band CVCB') now present on mantle lobe. Pedicle lobe partially enclosed by mantle lobe; the attachment disk has formed on its distal tip. Scale bar. 45 /xm. (E) Oblique ventral view of mantle and pedicle lobes of competent larva, showing ventral ciliated band and attachment disk. Scale bar. 20 these treatments were terminated; and about 80% of em- bryos or larvae held at 10° and 5°C survived to day 11 of the experiment. Most mortality occurred in the first 24-48 h. suggesting that either (a) late embryos (gastrulae and wedge embryos) were more sensitive to higher temperatures than larvae, or (b) lack of water changes produced the observed mortality at higher temperatures. In a second assay, development rate increased with tern-. Please note that these images are extracted
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
