Among the other invertebrate groups there is also a large proportion of endemic species.
But Ancillon's reputed liberalism was of too invertebrate a type to survive the trial of actual contact with affairs.
They feed chiefly on invertebrate animals, and none are poisonous.
Invertebrate fossils employed for the definite division of all the great periods of time.
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.
p. 146.) The food of the flamingo seems to consist chiefly of small aquatic invertebrate animals whch live in the mud of lagoons, for instance Mollusca, but also of Confervae and other low salt-water algae.
Probably most forms possess a resting, attached phase at some period or other, in the invertebrate, if not in the vertebrate host.
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 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 chief presentations of the methods of the American school of invertebrate palaeontologists are to be found in A.
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.
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.
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.
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.
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.
Vertebrate host, Athene noctua, Little Owl; invertebrate host, Culex pipiens.
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).
Dall and many other invertebrate palaeontologists subscribed.
The illustrations will be drawn both from vertebrate and invertebrate palaeontology.
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.
Schaudinn had fully described the relations of certain avian Trypanosomes to their invertebrate host, Culex pipiens (females).
In English-speaking countries, and by the majority of German writers, the meaning is now restricted to the study of the action of chemical substances (as apart from foods) on all kinds of animals, from bacteria up to man; it is, in fact, a comparative study of the action of chemical bodies on invertebrate and vertebrate animals.
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.
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).
the Gasteropod Capulus, whilst most of the invertebrate classes were represented in the Ordovician by forms which do not differ from their existing representatives in any important respect.
Frequent journeys to the Mediterranean, the Adriatic, and the North Sea gave him abundant materials for research on invertebrate anatomy and physiology, which he communicated first to the Munich academy of sciences, and republished in his Beitrdge zur vergleichenden Physiologie des Blutes (Leipzig, 1832-1833), with additions in 1838).
27, 2907) has brought forward evidence to show that the bed-bug (Cimex macrocephalus) is the invertebrate host.
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.
confined to the land, but had to do also with those littoral meadows where invertebrate and vertebrate marine animals fed in unlimited numbers.
The history of invertebrate palaeontology during the second period is more closely connected with the rise of historic geology and stratigraphy, especially with the settlement of the great and minor time divisions of the earth's history.
The treatise which laid the foundation for all subsequent invertebrate palaeontology was his memoir, Sur les fossiles des environs de Paris..
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.
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.
A classic but unfinished work describing the methods of invertebrate palaeontology is Die Stamme des Thierreichs (Vienna, 1889), by Melchior Neumayr.
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.
Nothing definite is yet known with regard to the transmission of the parasites by an alternate invertebrate host, although there is presumptive evidence in favour of this supposition.2 A word or two must be said in conclusion with reference to the supposed connexion of the Spirochaetae with the n Trypanosomes.
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.
tachinoides, does render it probable that the pathogenic forms also have true invertebrate hosts.
The size of the animals varies greatly, from forms a few millimetres in length to Gigantorhynchus gigas, which measures from 10 to 65 cms. The adults live in great numbers in the alimentary canal of some vertebrate, usually fish, the larvae are as a rule encysted in the body cavity of some invertebrate, most often an insect or crustacean, more rarely a small fish.
This was due to the much greater completeness and abundance of material afforded among invertebrate fossils, and it was manifested in the demonstration of two great principles or laws: first, the law of recapitulation, which is found in its most ideal expression in the shells of invertebrates; second, in the law of direct genetic succession through very gradual modification.
Archigetes and Caryophyllaeus are the only Cestodes that become fully differentiated in an invertebrate host.
It becomes fully developed in its invertebrate host, but apparently cannot produce eggs until transferred into the intestine of a fish.
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.
F nr x s.n ganglion cells below invertebrate sense-organs.
If you wish to name an invertebrate or a labor politician after me, feel free.
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.
II.-Second Historic Period Invertebrate palaeontology founded by Lamarck, vertebrate palaeontology by Cuvier.
Lamarck (1744-1829) was the founder of invertebrate palaeontology.
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.
indifferent, male or female, can be recognized in many cases, often in the vertebrate, but always more sharply differentiated in the invertebrate.
abundance of invertebrate taxa from the type-specific communities.
Studies of living invertebrate chordates have been very important in helping to solve the mystery of ' the origin of the vertebrates ' .
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.
herbivorous invertebrate species have been linked to it.
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.
The first was developed by chemical modification of a toxin from a marine invertebrate.
invertebrate fauna within the hazel woodland.
invertebrate zoology and plunge.
invertebrate taxa found in the Indian Ocean sites overlap with taxa previously known only to live in the Pacific.
invertebrate assemblage of European significance.
invertebrate prey of the birds of rocky shores.
Wet flushes, shallow ditches and small scrapes also benefit lapwing by providing additional sources of invertebrate food.
mayflylso supports a diverse invertebrate fauna including mayflies, stone and caddis flies and mollusks.
nightingale territories in scrub were selected for invertebrate sampling.
invertebrate pests are mostly specific to particular ornamental plants and greenhouse crops, and do not cause a problem in the wider environment.
In abundance of species the mollusks constitute the largest invertebrate phylum apart from the Arthropods with over 50,000 described species.
phylum: To illustrate through words, pictures and hands-on examination of living and dead animals the enormous variety within the invertebrate phyla.
Predicting the effects of marine climate change on the invertebrate prey of the birds of rocky shores.
taxonrty-six invertebrate taxa found in the Indian Ocean sites overlap with taxa previously known only to live in the Pacific.
Effects on Aquatic Species: DDT is very highly toxic to many aquatic invertebrate species.
The information is in the following book: Robert D. Barnes: invertebrate zoology (pic.
All the members of this order are parasitic on aquatic vertebrates and in rare cases derive their food from a vertebrate host indirectly by means of another invertebrate parasite (e.g.
The invertebrate in the is picture on the right is likely to be a pupa of a moth?
The information is in the following book: Robert D. Barnes: Invertebrate Zoology (pic.
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 word usage examples above have been gathered from various sources to reflect current and historial usage. They do not represent the opinions of YourDictionary.com.