. Characterization of the venom of Glycera dibranchiata. Sweet Briar College; Glycera dibranchiata. Ungerer 5 Because G. dibranchiata is commonly found in organically rich, muddy intertidal zones, it has long been considered a detritus feeder (Klawe & Dickie 1957). However, Ehlers (1868), the first to characterize G. dibranchiata, thought that the species could be carnivorous due to the presence of jaws and associated venom glands. In addition, Ockelmann & Vahl (1970) found that G. alba, a close relative of G. dibranchiata, fed on other errant polychaetes as well as amphipods. An unpub
. Characterization of the venom of Glycera dibranchiata. Sweet Briar College; Glycera dibranchiata. Ungerer 5 Because G. dibranchiata is commonly found in organically rich, muddy intertidal zones, it has long been considered a detritus feeder (Klawe & Dickie 1957). However, Ehlers (1868), the first to characterize G. dibranchiata, thought that the species could be carnivorous due to the presence of jaws and associated venom glands. In addition, Ockelmann & Vahl (1970) found that G. alba, a close relative of G. dibranchiata, fed on other errant polychaetes as well as amphipods. An unpublished student report (Cates, 2001) describes finding acicula and bundles of setae in the gut of G. dibranchiata, as well as an observation of a bloodworm ingesting a small nereid. Glycera species are unique for possessing a very large, eversible proboscis, used primarily for burrowing and likely for feeding (Klawe & Dickie 1957, Ockelmann & Vahl 1970). Heacox (1974) describes in great detail the structure of the proboscis. According to Heacox (1974), Wells (1937) was the first to divide the proboscis into three regions: an eversible buccal portion, a pharynx with jaws and associated venom glands, and the esophagus, which is folded into an S-shape in the inverted position (Fig. 2). Figure 2. The dissected anterior third of the digestive tract of G. 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 Ungerer, Natasha K.
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