Cephalopoda Glossary
The armature of the arms consists of suckers only or suckers and/or hooks. The number of series of armature along the arm varies between families. The illustration on the right shows some of the main variation in this armature. A - Shows the armature in 4 series with suckers in the marginal series and hooks, covered by sheaths, in the medial series. B - Shows an irregular arrangement near the base but 6 series throughout the remainder of the arm. C - Shows a biserial arrangement at the arm base becoming an irregular 4 series distally. D - Shows a biserial arrangement throughout with suckers proximally, followed by hooks with suckers again distally.
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Figure. A- Preserved arm of Gonatus berryi. Photograph by R. Young. B- Arm III of Joubiniteuthis portieri. Drawing from Young and Roper, 1969. C- Arm III of Bathyteuthis abyssicola. Drawing from Roper, 1969 . D- Arm III of Mesonychoteuthis hamiltoni. Drawing modified from Voss, 1980.
References
Roper, C.F.E. 1969. Systematics and zoogeography of the worldwide bathypelagic squid Bathyteuthis (Cephalopoda: Oegopsida). Bulletin of the United States National Museum, 291:1-210.
Young, R. E. and C. F. E. Roper (1969). A monograph of the Cephalopoda of the North Atlantic: The family Joubiniteuthidae. Smithson. Contr. Zool., No. 15: 1-10.
Voss, N. A. 1980. A generic revision of the Cranchiidae (Cephalopoda; Oegopsida). Bull. Mar. Sci., 30: 365-412.
About This Page
University of Hawaii, Honolulu, HI, USA
National Museum of Natural History, Washington, D. C. , USA
Katharina M. Mangold (1922-2003)
Laboratoire Arago, Banyuls-Sur-Mer, France
Page copyright © 2001 , , and Katharina M. Mangold (1922-2003)
Page: Tree of Life
Armature of Cephalopod Arms
Authored by
Richard E. Young, Michael Vecchione, and Katharina M. Mangold (1922-2003).
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