By R. N. Gibson
Oceanography and Marine Biology: An Annual evaluate considers easy parts of marine learn, returning to them whilst applicable in destiny volumes, and offers with matters of precise and topical significance within the box of marine biology. The thirty-ninth quantity follows heavily the targets and elegance of the sooner good acquired volumes, carrying on with to treat marine sciences - with all their numerous points - as a unit. actual, chemical and organic elements of marine technological know-how are handled via specialists actively engaged of their personal box.
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Occidentalis from Bonaire broods larvae in a scalloped tube peristome; one of the spoon-shaped leaflets in a three-leafed orifice was filled with developing embryos. Another specimen with large spoon-shaped leaflets near the orifice was found on Curaçao (Fig. 9E). P. ), although it is unclear if they are also used for brooding. Such scooped tube parts might indicate retention of early embryos for a short time. A tube of Pseudovermilia cf. pacifica from the Seychelles shows a beautiful cup- to dome-shaped ovicell over the entrance of the tube, deeper than that figured for Pseudovermilia cf.
Pemerl (1965) and Wessing & Polenz (1974) studied the ultrastructure of protonephridia in Serpula columbiana and Pomatoceros triqueter, respectively. Uschakova (1989) described the nervous system of some unidentified spirorbid larva (probably Spirorbis spirorbis) from the White Sea. Development of feeding larvae Developmental events in genera such as Ficopomatus, Galeolaria, Hydroides, Pomatoceros, Pomatoleios, Serpula and Spirobranchus, which have small eggs and planktotrophic larvae, 26 LIFE-HISTORY PATTERNS IN SERPULIMORPH POLYCHAETES Figure 5 Development of serpulids with planktotrophic larvae.
Vasifera. The record of opercular brooding in Ficopomatus enigmaticus by McIntosh (1924) was demonstrated to be erroneous by McIntosh (1926). The single, but very explicit record by Fischer-Piette (1937) of F. enigmaticus brooding its larvae in the tube is uncorroborated in the subsequent very extensive literature on this species (over 300 records) and refuted by Figure 9 (opposite) Brooding methods in serpulids. Brooding inside the tube, A: Salmacina dysteri, two larvae in the tube near the parental abdomen.