Aspidosiphonidae

Aspidosiphonidae is a family of peanut worms. It is the only family in the monotypic order Aspidosiphonida, which is in the class Phascolosomatidea.^{[1][2][3][4][5]}

Aspidosiphonidae
Aspidosiphon steenstrupii
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Annelida
Class:	Sipuncula
Order:	Aspidosiphonida
Family:	Aspidosiphonidae Quatrefages, 1865
Genera
Aspidosiphon Diesing, 1851 Cloeosiphon Grube, 1868 Lithacrosiphon Shipley, 1902

Description

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.^[1][2][4][5]

Species

Aspidosiphon

• Aspidosiphon albus Murina, 1967^[4][5][6]
• Aspidosiphon coyi de Quatrefages, 1865^[4][5]
• Aspidosiphon elegans (Chamisso and Eysenhardt, 1821)^[4][5]
• Aspidosiphon exiguus Edmonds 1974^[4][5]
• Aspidosiphon fischeri Broeke, A. ten, 1925^[4][5]
• Aspidosiphon gosnoldi Cutler, E., 1981^[4][5]
• Aspidosiphon gracilis (Baird, 1868)^[4][5]
• Aspidosiphon laevis de Quatrefages, 1865^[4][5]
• Aspidosiphon mexicanus Murina, 1967^[4][5]
• Aspidosiphon misakiensis Ikeda 1904^[4][5]
• Aspidosiphon muelleri Diesing 1851^[4][5]
• Aspidosiphon parvulus Gerould, 1913^[4][5][6]
• Aspidosiphon planoscutatus Murina, 1968^[4][5]
• Aspidosiphon spiralis Sluiter, 1902^[4][5][6]
• Aspidosiphon steenstrupii Diesing, 1859^[4][5]
• Aspidosiphon tenuis Sluiter, 1886^[4][5]
• Aspidosiphon thomassini Cutler and Cutler, 1979^[4][5]
• Aspidosiphon venabulum Selenka & Bulow, 1883^[4][5]
• Aspidosiphon zinni Cutler, 1969^[4][5][6]

Cloeosiphon

• Cloeosiphon aspergillus (de Quatrefages, 1865)^[4][5]

Lithacrosiphon

• Lithacrosiphon cristatus (Sluiter, 1902)^[4][5]
• Lithacrosiphon maldivensis Shipley 1902^[4][5]