Blocks of skeletal muscle tissue in aquatic chordates
Myomeres are blocks of skeletal muscle tissue arranged in sequence, commonly found in aquatic chordates. Myomeres are separated from adjacent myomeres by connective fascia (myosepta) and most easily seen in larval fishes or in the olm. Myomere counts are sometimes used for identifying specimens, since their number corresponds to the number of vertebrae in the adults. Location varies, with some species containing these only near the tails, while some have them located near the scapular or pelvic girdles. Depending on the species, myomeres could be arranged in an epaxial or hypaxial manner. Hypaxial refers to ventral muscles and related structures while epaxial refers to more dorsal muscles. The horizontal septum divides these two regions in vertebrates from cyclostomes to gnathostomes. In terrestrial chordates, the myomeres become fused as well as indistinct, due to the disappearance of myosepta.
Myomeres are blocks of skeletal muscle tissue arranged in sequence, commonly found in aquatic chordates. Myomeres are separated from adjacent myomeres...
chordates are characterised by the presence of segmented muscle blocks called myomeres and notochord, the two defining features of chordates. Before the full...
pouches and muscle blocks (myomeres), despite the lack of differentiation in the structure of these blocks. In vertebrates, myomeres are also thinner, and...
body that was roughly ten millimeters in length. It possessed S-shaped myomeres, numbering roughly seven per one millimeter of length. Two triangular fins...
hypaxial musculature and epaxial musculature. They do, however, have true myomeres and myosepta like all vertebrates. The mechanics of their craniofacial...
cylindrical, uniformly thick, and segmented with regularly spaced furrows at the myomere borders. The tail is relatively short, laterally flattened, and surrounded...
least six and perhaps nine probable gills. There are a number of segments (myomeres) with rear directed chevrons in the tail. There is a notochord. There is...
starts to grow in postflexion and juvenile stages. Glassy sprats have 46-48 myomeres. They have striations on their hindgut, and their gut is long and straight...
skeleton is reduced and poorly calcified, the muscle blocks along its sides (myomeres) are weakly developed, and its fins are soft and small. Its long caudal...
the myosepta (connective tissues separating blocks of muscle tissue, the myomeres), and represent ossified myoseptal tendons. Therefore, myorhabdoi form...
undulatory locomotion is that they have segmented muscles, or blocks of myomeres, running from their head to tails which are separated by connective tissue...
six gill pouches with hemibranchs. In the trunk there are 25 segments (myomeres) with rearward-facing chevrons. There is a notochord, a pharynx and a digestive...
bladders. Like many other eels, they lack scales and pelvic fins. Their myomeres (muscle segments) are V-shaped instead of W-shaped as in all other fishes...
of the lancelet and it swam perhaps much like an eel. A notochord and myomeres (segmented blocks of skeletal muscles) span the entire length of the body...
containing mucous or slime. myotomes Blocks of lateral trunk muscles. myomeres Blocks of muscle corresponding to number of vertebrae, easily seen in larval...
anus. Also like vertebrates, the muscles are arranged in blocks called myomeres. Unlike vertebrates, the dorsal nerve cord is not protected by bone but...
maturing eels: the total number of vertebrae (mean 107.2), the number of myomeres (mean 108.2), and the distance between the origin of the dorsal fin to...
substances on the inside of the body and a thin layer of muscle with visible myomeres on the outside. Their body organs are small and they have only a simple...
Anguillidae are great swimmers due to their axial muscle attachment and W-shaped myomeres giving them the capability of swimming backwards just as well as they can...
undulatory locomotion is that they have segmented muscles, or blocks of myomeres, running from their head to tails which are separated by connective tissue...
The larval stage is extensively described, with the species having 24 myomeres. The growth of the species is not reported, however numerous morphometric...
Meristic characters are the countable structures occurring in series (e.g. myomeres, vertebrae, fin rays). These characters are among the characters most commonly...
of Panderodus conodont elements and associated soft tissues including myomeres was found in the Waukesha Biota. Grooves on the elements were suggested...
After about 4 days after spawning, the embryos obviously show blood, myomeres are well developed, the tail is free from the yolk sac, pigment is well...
Myllokunmingia, which also lived in the Cambrian, no impressions of its myomeres have been found. The ventral fin is low in height, and runs much of the...
with an attenuate body composed of 49–52 clearly defined segments (i.e. myomeres, between the last gill slit and the anus). Silver lampreys possess a cartilaginous...
skin, makes the skin stiffer in the longitudinal direction, providing myomeres with leverage and anchorage for pulling tendons. At low curvatures, it...
that of other catostomids. Larvae can be identified by fin ray counts, myomere counts, and pigmentation. Spotted suckers are not federally listed as endangered...
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