myomeres

- These - bundles, we may mention -, are called myomeres, and they are indicated in Figure 1 by lines pointing acutely forward.

Text Book of Biology, Part 1: Vertebrata 1906

One might argue that the axial band-like visceral cavity of Vetustovermis planus is a notochord and that the transverse bars are not gills but myomeres, thereby indicating this animal was a chordate.

Down with phyla! (episode II) - The Panda's Thumb 2005

Similar myomeres, similarly situated, are found in fish, behind the head, and, less obviously, they occur with diminishing importance as the scale of the vertebrata is ascended.

Text Book of Biology, Part 1: Vertebrata 1906

The segments alternate with the vertebrae, and are called myomeres.

Text Book of Biology, Part 1: Vertebrata 1906

We have seen a certain intermediateness of structure in the frog, as compared with the rabbit and dog-fish, notably in the skull and skeleton, in the circulation, in the ear, and in the reduced myomeres; and we have seen that the rabbit passes in these respects, and in others, through dog-fish - and frog-like stages in its development, and this alone would be quite sufficient to suggest that the similarities of structure are due to other causes than a primordial adaptation to certain conditions of life.

Text Book of Biology, Part 1: Vertebrata 1906