Aspidosiphonidae
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The family Aspidosiphonidae is characterized by an oval disk with short tentacles, arranged in a crescent-shape made of an enclosed nuchal organ. It has a canal of sacs in the coelom, lying in a continuous band. The anal and caudal shield (at the anterior end) are both made up, not of chitin, but of a horny protein. It is of note that most, but not all, of the Aspidosiphonidae family has a caudal shield. The family also has two nephridia.
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Species
Aspidosiphon
- Aspidosiphon albus Murina, 1967
- Aspidosiphon coyi de Quatrefages, 1865
- Aspidosiphon elegans (Chamisso and Eysenhardt, 1821)
- Aspidosiphon exiguus Edmonds 1974
- Aspidosiphon fischeri Broeke, A. ten, 1925
- Aspidosiphon gosnoldi Cutler, E., 1981
- Aspidosiphon gracilis (Baird, 1868)
- Aspidosiphon laevis de Quatrefages, 1865
- Aspidosiphon mexicanus Murina, 1967
- Aspidosiphon misakiensis Ikeda 1904
- Aspidosiphon muelleri Diesing 1851
- Aspidosiphon parvulus Gerould, 1913
- Aspidosiphon planoscutatus Murina, 1968
- Aspidosiphon spiralis Sluiter, 1902
- Aspidosiphon steenstrupii Diesing, 1859
- Aspidosiphon tenuis Sluiter, 1886
- Aspidosiphon thomassini Cutler and Cutler, 1979
- Aspidosiphon venabulum Selenka & Bulow, 1883
- Aspidosiphon zinni Cutler, 1969
Cloeosiphon
- Cloeosiphon aspergillus (de Quatrefages, 1865)
Lithacrosiphon
- Lithacrosiphon cristatus (Sluiter, 1902)
- Lithacrosiphon maldivensis Shipley 1902
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Monotypic taxonTaxonomic group with only one subordinate taxonSpecies descriptionFormal description of a discovered speciesParaphylyType of taxonomic groupIUCN Red ListInventory of the global conservation status of biological speciesSubtropicsGeographic and climate zoneCommon nameName generally used for a taxon, group of taxa or organism(s)