Cephalopod Dorsal Head-Mantle Fusion

Richard E. Young, Michael Vecchione, and Katharina M. Mangold (1922-2003)

Cephalopoda Glossary

In decapodiforms the dorsal margin of the mantle may be free (i.e., no head fusion) or it may join with the head by the narrow fusion of the nuchal locking-apparatus, or it may fuse broadly (Fig. on right) with the head, which is somewhat similar to the situation in octopods.

Figure. A - Dorsal view of Iridoteuthis iris (Fam. Sepiolidae), modified from Naef, 1921-23. B - Dorsal view of Euprymna stenodactyla (Fam. Sepiolidae), modified from Voss, 1963.

The photographs illustrate all three cases: A free dorsal mantle margin (Fig. A); the dorsal mantle fused at the nuchal locking-apparatus (Fig. B at arrow) and the dorsal mantle margin broadly fused to the head (Fig. C between arrows).

Figure. A - Heteroteuthis hawaiiensis (Fam. Sepiolidae). B - Megalocranchia fisheri (Fam. Cranchiidae). C - Euprymna scolopes (Fam. Sepiolidae). Photographs © R. Young.


Naef, A. 1921-23. Cephalopoda. Fauna und Flora des Golfes von Neapel. Monograph, no. 35. English translation: A. Mercado (1972). Israel Program for Scientific Translations Ltd., Jerusalem, Israel. 863pp., IPST Cat. No. 5110/1,2.

Voss, G. L. 1963. Cephalopods of the Philippine Islands. Bull. U. S. Nat. Mus., 234: 1-180.

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

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