(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.
Porcupine
Definition:
(n.) Any Old Word rodent of the genus Hystrix, having the back covered with long, sharp, erectile spines or quills, sometimes a foot long. The common species of Europe and Asia (Hystrix cristata) is the best known.
(n.) Any species of Erethizon and related genera, native of America. They are related to the true porcupines, but have shorter spines, and are arboreal in their habits. The Canada porcupine (Erethizon dorsatus) is a well known species.
Example Sentences:
(1) It is apparent that seasonal acclimatization of the Cape porcupine is also reflected by these parameters.
(2) The parasites in these and eight cases previously reported from the northern United States and Canada are classified as resembling Dirofilaria ursi, a primarily subcutaneous parasite of bears, or D. subdermata of porcupines, in the same region.
(3) Overall minimal thermal conductance was calculated for newborn and paired adult porcupines.
(4) Trypanosoma cruzi-like parasites were found in 13 different species, and were particularly common in a variety of marsupials (Didelphidae), porcupines (Coendou spp.
(5) The woodchuck had a higher threshold and significantly smaller slope to its CO2 ventilatory response compared to the porcupine, but showed no difference in its hypoxic ventilatory response.
(6) It is suggested therefore that the Caviomorpha (guinea pig-like rodents) and possibly the Hystricomorpha (porcupine-like rodents) should be elevated in taxonomic rank and conferred an ordinal status distinct from the Rodentia.
(7) Aureobasidium pullulans was repeatedly isolated from a cutaneous infection of a porcupine (Erethizon dorsatum).
(8) The Quill Location: Southwark | Floors: 31 | Height: 109m | Architect: SPARRC | Status: approved | Use: student accommodation The Quill What would a building look like if it had a fight with a gigantic porcupine, and the porcupine won?
(9) The results indicate that plasma progesterone-binding proteins in Cape porcupines (Old World hystricomorph) are similar in composition to those in guinea-pigs (New World hystricomorph).
(10) The reproductive tract of the male Cape porcupine is morphologically and histologically similar to that of New World hystricomorph rodents.
(11) The constituent cell types of the ovary of the porcupine were similar to those of New World hystricomorph rodents and accessory corpora lutea and luteal bodies were formed through the luteinization of the membrana granulosa or theca interna of antral follicles.
(12) The woodchuck P50 of 27.8 was hardly different from the porcupine value of 30.7, but the Bohr factor, -0.72, was greater than the porcupine's, -0.413.
(13) This is the first report of notoedric acariasis in the porcupine.
(14) Sled dogs from five native villages on the range of the Artic caribou herd, but not from two villages on the the range of the Porcupine caribou herd, are commonly infected.
(15) Methods used to produce wounds included insertion of porcupine quills, application of constrictive rubber bands, mascara injections and excoriation of healing wounds.
(16) Mass-specific food and water intake of control and lactating porcupines was examined throughout the 68-78 days of lactation.
(17) Sexually mature female Cape porcupines kept under natural conditions of illumination and temperature did not conceive while housed within their natal groups.
(18) The reproductive pattern of porcupines is associated with low juvenile mortality and long adult lifespan (both of which reflect the porcupine's protective morphology), and may be related to the quality of winter diets.
(19) Six of 16 porcupines (Erethizon dorsatum) live-trapped in Sullivan County, Pennsylvania were infested with the mite Notoedres douglasi.
(20) To assess the effect of huddling, these parameters were also measured in adult pairs of porcupines (Ta = 15 and 25 degrees C) kept together in the metabolic chamber and the values were compared with those obtained from single porcupines.