Home Acknowledgments Conventions Glossary Maps References Links Articles Thumbnails Species list Next order	Sacoglossa The order Sacoglossa (also known as Ascoglossa) is a highly diverse assemblage of opisthobranchs that are united by their specialized radular morphology. Only one radular tooth is used at a given time and worn teeth are stored internally in a sack. Nearly all sacoglossans are herbivores, using their radular tooth to puncture algal cells, then sucking out the contents. Most feed on green algae. The cells lining the digestive gland in many species engulf functional chloroplasts derived from their algal food. These organelles, called kleptoplastids, continue to photosynthesize providing sugars that may be important for their host's nutrition. At least seven families are found in Hawaii. Medina, et. al., (2011) recovers the Siphonariidae as the sister group to the Sacoglossa and they could be inserted as the next order under the name Siphonariacea (or be grouped with the Sacoglossa as the Siphoglossa). However, since they haven't been traditionally considered opisthobranchs, we've decided to leave them in the marine pulmonate addendum, at least for now. In contrast, Bouchet, et. al., 1917 places the Sacoglossa with the Siphonariidae in the pulmonates. Cylindrobullidae Juliidae Oxynoidae Plakobranchidae Limapontiidae Hermaeidae Caliphyllidae
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