A genus of ganoid fishes, of the order Dipnoi, first known as Mesozoic fossil fishes; but recently two living species have been discovered in Australian rivers.
An order of ganoid fishes, including the sturgeons; -- so called on account of their cartilaginous skeleton.
An extinct genus of Devonian ganoid fishes, having the broad plates about the head studded with berrylike tubercles.
A genus of fossil ganoid fishes found in the old red sandstone or Devonian formation.
Such a tail is seen in most sharks, in the sturgeon, garpike, bowfin, and in the Ganoid fishes.
The Ganoid differs from the Crossopterygian in having the basal elements of the paired fins small and concealed within the flesh.
These plates are covered with minute, close-set tubercles, covered with brilliant ganoid enamel and with finely crimped edges.
Bony scales in other types of fishes may have nothing structurally in common with ganoid scales or plates, however great may be the superficial resemblance.
The true fishes appear also in the Devonian in the guise of the Ganoid ancestors and relatives of Palaeoniscum, all with diamond-shaped enameled scales.
Here are found the first true bony fishes, doubtless derived from Ganoid stock, the allies and predecessors of the great group of herrings.
These are found in the garpike and in many genera of extinct Ganoid and Crossopterygian fishes.
In the great majority of the Ganoid fishes the bladder served but a minor purpose as a breathing organ, the gills doing the bulk of the work.
In the oldest secondary rocks of Britain and elsewhere there occur in abundance the teeth of a genus of ganoid fishes known as the Ceratodi.
Amphibia, affinity of, to the ganoid fishes; vocal organs of the.
But on Earth we have weather, and it happened a long, long time ago, back in the days of three-toed horses and ganoid fish.
But it was not a sturgeon, though sturgeons are now the main representatives of what once were innumerable ganoid species.
They were made when there were three-toed horses and many ganoid fishes on the earth.
The forms of batrachians with which we are acquainted show the vertebral column to have been evolved in the course of time from a notochordal condition with segmented centra similar to that of early bony ganoid fishes (e.
For instance, some species of Trigonia, a great genus of shells in the secondary formations, survive in the Australian seas; and a few members of the great and almost extinct group of Ganoid fishes still inhabit our fresh waters.
One of the large, bony, external plates found on many ganoid fishes.
An order of ganoidfishes of which the bichir of Africa is a living example.
The ganoid scales of sturgeon we are hardly likely to meet with.
This may be done either by supposing the Ganoid arrangement to have been the primitive one in the ancestors of the other forms, or, by supposing characters acquired primitively by the female to have become inherited by both sexes.
The Teleostei, which have in common a meroblastic segmentation, had probably a Ganoid ancestor, the ova of which were provided with a large amount of food-yolk.
It is quite possible that Amia may also be a descendant of the Ganoid ancestor of the Teleostei; but Lepidosteus, as shewn by its complete segmentation, is clearly not so.
The very heterogeneous character of the Ganoidgroup is clearly shewn both in its embryology and its anatomy.
Old Red Sandstone Ganoids[51] and Chimaera, probably indicates that an extension of our knowledge will bring to light further affinities between the primitive Ganoid and Holocephalous stocks and the Amphibia.
Between reptiles and fishes an intermediate type has been found in the Archegosaurus of the Coal formation; while the Labyrinthodon of the Trias combined characters of the Batrachia with those of crocodiles, lizards, and ganoid fishes.
Hitherto it had comprised at least two-thirds of all the fish that had existed ever since the period in which fish first began; and almost every Ganoid fish had its own peculiar pattern of scale.
But did any of them ever tell a story half so instructive or so strange as that told by the incalculably more ancient ganoid tiles of the Palæozoic and Secondary periods?
What most struck me, however, in glancing over the drawers of Mr. Duff, was the character of the Ganoid scales of this deposit.
Footnote 1: Since this Address was read, Mr. Krefft has sent us news of the discovery in Australia of a fresh-water fish of strangely Palaeozoic aspect, and apparently a Ganoid intermediate between Dipterus and Lepidosiren.
The only modification which it occurs to me to suggest in this general view of the Phylogeny of the Vertebrata is, that the "Protamphirhine" was possibly more ganoid than shark-like.
For instance, a single species of Trigonia, a great genus of shells in the secondary formations, survives in the Australian seas; and a few members of the great and almost extinct group of Ganoid fishes still inhabit our fresh waters.
They have many peculiarities of structure indicating their ancient ganoid lineage; and besides our common species two others are known, one of which, the alligator gar, belongs to the Gulf Coast and Central American rivers.
Ganoid scales are such as formed the armor of the great extinct tribe of ganoid fishes, a remnant of which survives in our gar pikes, or billfish.
A division of ganoid fishes including those that have large external bony plates and a cartilaginous skeleton.
A suborder of existing ganoid fishes having numerous fins along the back.
An African genus ofganoid fishes including the bichir.
An eel-shaped ganoid fish of the order Dipnoi, having both gills and lungs.
A group of fossil amphibians allied to the labyrinthodonts, having the head defended by bony, sculptured plates, as in some ganoid fishes.
One of the small, spiniform scales found on the front edge of the dorsal and caudal fins of many ganoid fishes.
Many of the species are covered with bony plates, or with ganoid scales; others have cycloid scales.
An order of ganoid fishes, including the modern gar pikes and many allied fossil forms.
A division of ganoid fishes, including the gar pikes and bowfins.
A tubular orifice communicating with the gill cavity of certain ganoidand all elasmobranch fishes.
A genus of ganoid fishes, including the sturgeons, having the body armed with bony scales, and the mouth on the under side of the head.
Their long heads, short necks, supports for gills, feeble limbs and long flat tail, show that they were aquatic creatures presenting many points of resemblance to the Ganoidfishes which must have been their companions.
They differ from theganoid fishes by having soft scales and a complete bony skeleton.
There are seven living kinds of ganoid fish and all are found in fresh water.
Some of them were giants in their way, being probably seven inches in expanse of wing, and their larvae must have been choice morsels to the ganoid fishes, and would have afforded abundant bait had there been anglers in those days.
The fishes of the Wealden are chiefly referable to the Ganoid and Placoid orders.
Ganoid fish, such as Holoptychius, also occur; but these are far less numerous.
The Asterolepis was a ganoidfish of gigantic dimensions.
Ganoid traits are present in certain families of Isospondyli.
Doubtless all of the Teleostei are descended from a ganoid ancestry.
The codfishes probably represent an early offshoot from the ancestors of the spiny-rayed fishes, and their line of evolution is unknown, possibly from Ganoid types.
The fins are fringed with fulcra, the scales are ganoid and rhombic, and the vertebræ reduced to rings.
Traces of each of the Ganoidtraits may persist somewhere in some group, but as a whole we see a distinct specialization and a distinct movement toward the fish type, with the loss of characters distinctive of sharks, Dipnoans, and Ganoids.
Pectoral fin with more than five actinosts; scales ganoid or cycloid.
They lack wholly or partly the Ganoid traits, or show them only in the embryo.
Cope, Woodward, Hay, and others have dropped the name Ganoid altogether as productive of confusion through the many meanings attached to it.
The typical Ganoid characters of the thalamencephalon and the cerebral hemispheres.
The Amiidæ retain many of the Ganoid characters, though approaching more nearly than any other of the Ganoids to the modern herring tribe.
Most primitive of the Isospondyli is the extinct family of Leptolepidæ, closely allied to the Ganoid families of Pholidophoridæ and Oligopleuridæ.
In those species which have bony plates instead of scales, this bone has a deposit of bony substance or ganoid enamel at the surface.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "ganoid" in a variety of sentences. We hope that you will now be able to make sentences using this word.
