. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. PINNIXA LONGIPES LARVAL DKVELOPMENT After hatching, the larvae were placed in finger howls ( 10-cin diameter) and maintained under the same salinity, temperature, and light parameters as the adults. From 10 to 20 zoeae were put in each howl . Each day. after changing the medium, approximately 2 nil each of concentrated Ditnaliclla tcrtiolccta and Phaeodactylum tricornutuw were added to the howls. The algae were cultured in a half-strength enriched seawater medium "f" ((luillard and Ryther. 1962). During the experi-
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. PINNIXA LONGIPES LARVAL DKVELOPMENT After hatching, the larvae were placed in finger howls ( 10-cin diameter) and maintained under the same salinity, temperature, and light parameters as the adults. From 10 to 20 zoeae were put in each howl . Each day. after changing the medium, approximately 2 nil each of concentrated Ditnaliclla tcrtiolccta and Phaeodactylum tricornutuw were added to the howls. The algae were cultured in a half-strength enriched seawater medium "f" ((luillard and Ryther. 1962). During the experi- ment, algal material was clearly evident within the larval digestive tracts. (Pre- liminary culturing observations in the early summer of 1978 demonstrated that Artcinia salina is an inappropriate food for /'. lanyipcs larvae.) Larvae of each stage were preserved in ethvlene glycol along with the dead zoeae and exuviae. Pigmentation was observed on both living and preserved specimens. Drawings were made from preserved larvae and exuviae using a camera lucida, calibrated with a stage micrometer. Appendages were dissected with fine needles. Descriptions and illustrations were checked against at least five specimens from each stage of development. RESULTS Pigmentation The location of chromatophores is fairly consistent throughout the zoeal develop- ment of lonyipes. The arrangement of chromatophores is diagramed in Figure 1. The eyes are dark reddish brown in color. A pair of yellow chromato- phores is located on abdominal segment 5 near its attachment to the telson, and a similar pair is found on the posterior-lateral portion of abdominal segment 4 (Fig. 1 A and C, 1 and 2 respectively). A single yellow chromatophore is present on abdominal segments 2 and 3 in a posterior-medial position (Fig. 1A and C, 3 and 4). On the first abdominal segment a yellow chromatophore is situated anteriorly and medially (Figs. 1A and C, 5). A yellow chromatophore is located on the distal
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
