noun
definition
An animal without vertebrae, i.e. backbone.
definition
A spineless person; a coward.
adjective
definition
Lacking a backbone.
Examples of invertebrate in a Sentence
Among the other invertebrate groups there is also a large proportion of endemic species.
They feed chiefly on invertebrate animals, and none are poisonous.
But Ancillon's reputed liberalism was of too invertebrate a type to survive the trial of actual contact with affairs.
Known invertebrate hosts for different species are Hemiclepsis and Piscicola, leeches.
It chiefly consists of stratified volcanic tuffs rich in coal, lignite, fossilized plants and an invertebrate fauna.
Invertebrate fossils employed for the definite division of all the great periods of time.
Probably most forms possess a resting, attached phase at some period or other, in the invertebrate, if not in the vertebrate host.
Studies of living invertebrate chordates have been very important in helping to solve the mystery of ' the origin of the vertebrates ' .
Vertebrate host, Athene noctua, Little Owl; invertebrate host, Culex pipiens.
The first was developed by chemical modification of a toxin from a marine invertebrate.
In abundance of species the mollusks constitute the largest invertebrate phylum apart from the Arthropods with over 50,000 described species.
Predicting the effects of marine climate change on the invertebrate prey of the birds of rocky shores.
Previous to its arrival Australia doubtless possessed considerable vegetation and a scanty fauna, chiefly invertebrate.
Such is the general history of Cestodes whose intermediate host is an Invertebrate.
All these writers attacked the problem of descent, and published preliminary phylogenies of such animals as the horse, rhinoceros and elephant, which time has proved to be of only general value and not at all comparable to the exact phylogenetic series which were being established by invertebrate palaeontologists.
Dall and many other invertebrate palaeontologists subscribed.
The minute gradations observed by Hyatt, Waagen and all invertebrate palaeontologists, in the hard parts (shells) of molluscs, &c., are analogous to the equally minute gradations observed by vertebrate palaeontologists in the hard parts of reptiles and mammals.
The transmission of the parasites from one vertebrate individual to another is effected, in the great majority of cases,' by a blood-sucking invertebrate, and by this means alone.
If you wish to name an invertebrate or a labor politician after me, feel free.
This study of direct genetic series marked another great advance, and became possible in invertebrate palaeontology long before it was introduced among the vertebrates.
The invertebrate in the is picture on the right is likely to be a pupa of a moth?
The insatiable appetite of this invertebrate will keep you occupied for hours on end as you frantically seek out the lexicon entries hidden among the mass of letter tiles.
And that cute invertebrate in the corner certainly doesn't hurt.
The illustrations will be drawn both from vertebrate and invertebrate palaeontology.
Melchior Neumayr, the great Austrian palaeontologist, especially extended the philosophic foundations of modern invertebrate palaeontology, and traced a number of continuous genetic series (formenreihe) in successive horizons.
Moreover, it is very probable that conjugation occurs soon after the arrival of the parasites in their specific invertebrate host; and this act may perhaps give rise to an aflagellar copula, which is gregariniform and comparable to an ookinete.
His earlier publications were on zoology; he dealt with the Amphibia (1839), Reptiles (1840), with Mollusca and Crustacea (1845) and more generally with the invertebrate fauna of the Mediterranean (1854).
Crustaceans The largest Phylum of invertebrate animals is the Arthropoda containing the crustaceans The largest Phylum of invertebrate animals is the Arthropoda containing the crustaceans with over 50,000 marine species.
The reserve has a rich invertebrate fauna which has been studied.
The aim was to survey the habitat resource and to characterize the sediment types favored by the specialist invertebrate fauna.
Half of all invertebrate species live in tropical rain forests, less than 7% of the world's surface.
This colonial hydrozoan (jellyfish-like invertebrate animal) has a float bladder that was fully inflated and 22 cm in length.
The site also supports some notable species of aquatic invertebrate.
Wet flushes, shallow ditches and small scrapes also benefit lapwing by providing additional sources of invertebrate food.
The great problems involved in the study of geographical distribution must therefore be based mainly upon the other classes, both vertebrate and invertebrate, which, moreover, enjoy less great facilities of locomotion than the birds.
It appears from comparison of the work in the two great divisions of vertebrate and invertebrate palaeontology made for the first time in this article that in accuracy of observation and in close philosophical analysis of facts the students of invertebrate palaeontology led the way.
Huxley questioned the time value of fossils, but recent research has tended to show that identity of species and of mutations is, on the whole, a guide to synchroneity, though the general range of vertebrate and invertebrate life as well as of plant life is generally necessary for the establishment of approximate synchronism.
Thus both invertebrate and vertebrate palaeontologists have reached independently the conclusion that the evolution of groups is not continuously at a uniform rate, but that there are, especially in the beginnings of new phyla or at the time of acquisition of new organs, sudden variations in the rate of evolution which have been termed variously " rhythmic," "pulsating," " efflorescent," "intermittent " and even " explosive " (Deperet).
Until lately it remained quite uncertain, however, whether the invertebrate merely conveys the Trypanosomes or whether 1 Trypanosoma equiperdum, the cause of dourine in horses and asses, is apparently only conveyed by the act of coitus.
The treatise which laid the foundation for all subsequent invertebrate palaeontology was his memoir, Sur les fossiles des environs de Paris..
On the whole, as in the case of vertebrate palaeontology, the pre-Darwinian period of invertebrate palaeontology was one of rather dry systematic description, in which, however, the applications of the science gradually extended to many regions of the world and to all divisions of the kingdom of invertebrates.
This definitely directed evolution, or development in a few determinable directions, has since been termed " orthogenetic evolution," and is recognized by all workers in invertebrate palaeontology and phylogeny as fundamental because the facts of invertebrate palaeontology admit of no other interpretation.
In other words, the origin, or first appearance of new characters, which is the essence of evolution, is an orderly process so far as the vertebrate and invertebrate palaeontologist observes it.
In the stomach it casts its membranes and becomes mobile, bores through the stomach walls and encysts usually in the bodycavity of its first and invertebrate host.
It becomes fully developed in its invertebrate host, but apparently cannot produce eggs until transferred into the intestine of a fish.
The relationship of the Hymenoptera to other orders of insects is discussed in the article Hexapoda, but it may be mentioned here that in structure the highest members of the order are remarkably specialized, and that in the perfection of their instincts they stand at the head of all insects and indeed of all invertebrate animals.
The Texas Cretaceous is notably rich in the fossil remains of an invertebrate fauna and in the vicinity of Waco Cretaceous fossils of vertebrates have been obtained.
P. Lamarck's term Annelides, now used to denote a major phylum or division of coelomate invertebrate animals.
Lamarck (1744-1829) was the founder of invertebrate palaeontology.
This line of hypothesis and demonstration is typical of the palaeogeographic methods generally - namely, that vertebrate palaeontologists, impressed by the sudden appearance of extinct forms of continental life, demand land connexion or migration tracts from common centres of origin and dispersal, while the invertebrate palaeontologist alone is able to restore ancient coast-lines and determine the extent and width of these tracts.