<国立科博専報>高知沖で採集した深海性魚類の背大動脈靱帯の比較形態学

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A longitudinal ligament found in the dorsal aortae of the trout, the sardine and also the sturgeon has been noticed from the beginning of this century. This structure is notable, particularly from the systematic point of view, however, little has contributed to the comparative anatomy of this structure. After prosecuting the comparative study of this ligament and the vertebral column supporting the one, the author has come to recognize upique developments of these structures in species of the families; Clupeidae and Salmonidae. This seems to reflect a phylogenetical relationship of these families, and it is necessary to prosecute the further study of various forms. The author has recently studied the several kinds of deep-sea species of the lower teleosts collected off Kochi. This paper deals with the gross morphology of ligament and the correlated osteological peculiarities of these fishes. The study is now in progress, and the author wishes to give here only the following preliminary ideas; 1) In the fishes with longitudinal ligaments inside the aortae, their ligaments developed almost unexceptionally in parallel with the enlargement of the dorsal aorta of elliptic cross section. 2) In Diaphus and Hoplostethus, no ligament developed inside the dorsal aorta, and the aorta itself has comparatively small circular cross section as found commonly in fishes. 3) In Neoscopelus, a feebly developed ligament occurs inside the dorsal aorta. 4) In all fishes with the ligament inside the dorsal aorta, the enlarged aorta is held dorsally by the ventral plateau of the vertebral column. Each of these fishes, however, has its own ventral plateau respectively, and their plateau is not directly derived from the typical ones found in clupeid-salmonid vertebrae.
国立科学博物館の論文
1975-12-20

<国立科博専報>高知沖で採集した深海性魚類の背大動脈靱帯の比較形態学

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