(n.) A genus of Monotremata found in Australia, Tasmania, and New Guinea. They are toothless and covered with spines; -- called also porcupine ant-eater, and Australian ant-eater.
Example Sentences:
(1) In the echidna a few dark, organelle-rich glia cells were encountered.
(2) This study provides anatomical evidence for the presence of cone-like photoreceptors in the retina of the echidna.
(3) This is a report of experiments which provide evidence in support of the existence of an electric sense in the echidna, or spiny anteater Tachyglossus aculeatus.
(4) Echidna Mb, which has one replacement (Glu-59 to Ala) within region 56-62, displayed greatly reduced cross-reactivities and relative binding affinities.
(5) Echidna band A protein has some similarity to high cystine "whey" proteins.
(6) The concentration of pituitary LH is in the range of that found in eutherian mammals, but the concentration of ACTH is lower than that reported for other vertebrates, and this may be linked causally with the remarkably low rate of corticosteroid secretion in the echidna.
(7) The presence of two lysozyme variants, echidna lysozyme I and II, has been confirmed in mature milk samples of Tachyglossus aculeatus multiaculeatus and Tachyglossus aculeatus aculeatus respectively.
(8) There is a wide disparity in growth rates of echidna young that is related to differences in the body weights of the mothers.
(9) At the time of publishing the list stands at 244, including, but certainly not limited to: disturbed balance; blurred vision; cataracts; mass bee extinction; unexplained deaths of cattle, goats, dolphins, worms and sundry other animals; family discord; disoriented echidnas; social problems among peacocks; and eggs without yolks.
(10) The gross anatomy and nerve supply of the bill of echidna (Tachyglossus aculeatus) is described in relation to its function as an outstanding sensory organ.
(11) Within the rostral one centimetre of the Echidna beak, three specialised receptors were found: a mucous sensory gland, a rod-like structure, and an innervated epidermal pit.
(12) The cells of the secretory tubules in the mandibular gland of the echidna are packed with fairly large birefringent granules, which show a lamellated structure consisting of alternating thin and thick layers or shells of protein.
(13) Adult Aponomma concolor were able to locate their mammalian host (echidna) from distances greater than 3 reptile-infesting species could locate their hosts.
(14) Generally there are more changes between beta-chains; there are only three other examples reported where there are more changes between alpha-chains than beta-chains, these are of echidna, rabbit and dog globins.
(15) Maturation of spermatozoa in the Wolffian duct of the echidna appears to be expressed only in a changing capacity for motility and in loss of the cytoplasmic droplet.
(16) The karyotype of the platypus (2n = 52) has several features in common with those of the echidna species; six pairs of large autosomes, many pairs of small (but not micro-) chromosomes, and a series of small unpaired chromosomes which form a multivalent at meiosis.
(17) Neurohypophysial hormones of platypus seem similar to those of echidna, the other living prototherian, and to those of most placental mammals.
(18) The same properties make this formation different from the anterodorsal and anteroventral nuclei in rats, the equivalents of which could not be identified in echidnas.
(19) An additional nine live echidnas were presented for clinical examination for dog or fox wounds (eight), or wire snare wounds (one).
(20) Statistical comparison of amino acid composition of the component chains with other immunoglobulin heavy chains suggests that echidna gamma chains are more closely related to eutherian gamma chains than to the 7S Ig heavy chains from amphibia or aves.
Hedgehog
Definition:
(n.) A small European insectivore (Erinaceus Europaeus), and other allied species of Asia and Africa, having the hair on the upper part of its body mixed with prickles or spines. It is able to roll itself into a ball so as to present the spines outwardly in every direction. It is nocturnal in its habits, feeding chiefly upon insects.
(n.) The Canadian porcupine.
(n.) A species of Medicago (M. intertexta), the pods of which are armed with short spines; -- popularly so called.
(n.) A form of dredging machine.
Example Sentences:
(1) Two principal classes of striatum long axonal neurons (sparsely ramified reticular cells and densely ramified dendritic cells) were analyzed quantitatively in four animal species: hedgehog, rabbit, dog and monkey.
(2) The effect of methallibure (ICI 33828) on spermatogenesis was studied in the gerbil, hedgehog, and mouse.
(3) Mesenteric lymph nodes were examined from five hedgehogs captured on the Berkshire Downs.
(4) We suggest that the contralateral projection nuclei to the MOB of the hedgehog, unusual in other mammals, and the large number of cells with axonal collaterals projecting to both hemispheres, may be a strategy in these animals to bilaterally integrate brain functions at the expense of its reduced corpus callosum.
(5) Scottish Natural Heritage is exterminating them in the Outer Hebrides not because there is a plague of hedgehogs there but to protect the nests of the wading birds whose eggs and chicks a few escaped pet hedgehogs having been eating.
(6) Upper (Tf) and lower (Ts) temperature limits of order-disorder transitions in blood cell lipids of hedgehogs, Erinaceus europaeus, were determined over an annual cycle.
(7) In contrast, segmentation is essentially normal in l(1)armadillo, l(2)gooseberry, l(3)hedgehog, and l(1)fused embryos.
(8) However, the prolongation of the MAP at lower repolarization levels was much less in the hedgehog.
(9) John Byrom, a lazy, self-indulgent 18th-century versifier, had three black hedgehogs on his coat of arms.
(10) Forservices to the Rescue and Rehabilitation of Hedgehogs.
(11) Unlike any other animal in this country - except, perhaps, the mole, whose condition is, if anything, even more opaque, and just as likely to be following its own chute to oblivion - the hedgehog has always been a symbol and embodiment of something subtle and tender in the landscape.
(12) In a study of the elementary focus at Jarok, it was found that the frequency of antibodies was considerably higher in hedgehogs than in small rodents; this may be due to the longer life-cycle of the former, which makes the probability of reinfection greater.
(13) Only 11% of the 2,348 people who took part in the survey said they saw hedgehogs regularly in their gardens and 48% had never seen one.
(14) The histological structure of the testes and caput epididymidis of the hedgehog remains normal after 21 days of CdCl2 injection.
(15) The healing of the full-thickness skin wounds on the abdomen and the back of hedgehogs was investigated.
(16) We describe a study of the seasonal variations of hedgehog plasma lipids and lipoproteins and their correlation with changes in the activities of the thyroid and testis.
(17) Stories of hedgehog decline have been around for years, but only now is Bright completing the first statistically robust report on the drop in numbers.
(18) The granule cell islands in the olfactory tubercle (islands of Calleja) and the insula magna of Calleja are present in all species examined in this study: cat, rat, mouse, rabbit, hedgehog, monkey, man, and dolphin, displaying the same basic morphology.
(19) In animal homes and private care hibernating hedgehogs excreted larvae of Crenosoma striatum (23.5% and 21.0%, respectively), eggs of Capillaria species of the intestine (47.1% and 37.1%), and eggs of Capillaria aerophila (7.1% and 19.4%), but oocysts of Isospora rastegaievae were found to be predominant (44.7% and 32.3%).
(20) It is presumed that leptospires of the serogroups Javanica, Australis, Icterohaemorrhagiae, transmitted by the shrew-mice, hedgehogs and rats by the sexual route, are by their origin "ancient" serogroups of leptospires while the serogroups of leptospires isolated from domestic animals, showing predominantly the alimentary route of transmission of infection in the focus, are representatives of the "younger" forms of the evolutional development of leptospires.