(1) Morphology indicated the close association of sirenians with proboscideans; proteins suggested a pairing of sirenians with hyracoids.
(2) Hyracoids possess a tympanohyal which changes its relation to the facial nerve during ontogenesis.
(3) The shared taxeopody of hyracoids and proboscideans, along with other osteological characters and similarities in hemoglobin, eye lens proteins, and other molecules, all suggest that Hyracoidea belongs within Paenungulata.
(4) Thus, both the carpus and tarsus of Fayum hyracoids are taxeopode.
(5) Senckenberg 84, 1-132] that hyracoid taxeopody is an independent acquisition resulting from selection favoring increased midcarpal and midtarsal rotation and that Hyracoidea is actually allied with Perissodactyla.
(6) Amino acid-sequence and morphological data agreed on the placement of edentates as an early eutherian offshoot and on the grouping of hyracoids, proboscideans, and sirenians.
(7) As a test of this hypothesis, isolated carpal and tarsal bones of primitive Oligocene hyracoids from the Fayum, Egypt, have been examined to determine whether these indicate a taxeopode or diplarthral carpus and tarsus.
(8) Evidence of an annual testicular cycle contradicted the prevalent belief that equatorial hyrax breed all year and suggested that the testicular cycle is a conservative element of hyracoid reproductive strategy.
(9) Recent hyracoids and elephants share a taxeopode arrangement of tarsal and carpal bones, a condition in which bones are aligned with minimal interlocking between adjacent elements.
(10) A gonial is lacking in hyracoids; instead the malleus is fixed in a peculiar way at the tympanic.
(11) Taxeopody in hyracoids cannot be attributed to selection for carpal and tarsal rotation in climbers because the Oligocene, Miocene, and Recent species show great diversity in body size and probably locomotor specializations, despite relative uniformity of structure in the carpus and tarsus.
(12) It is the series with which the present account on the development of the tympanic region in hyracoids starts.
Hyrax
Definition:
(n.) Any animal of the genus Hyrax, of which about four species are known. They constitute the order Hyracoidea. The best known species are the daman (H. Syriacus) of Palestine, and the klipdas (H. capensis) of South Africa. Other species are H. arboreus and H. Sylvestris, the former from Southern, and the latter from Western, Africa. See Daman.
Example Sentences:
(1) Semi-thin plastic sections reveal that the carotid baroreceptor region in the rock hyrax comprising the origin of the internal carotid artery has a preponderantly elastic structure and a thick tunica adventitia.
(2) Intraorally the protraction device can either be attached to a bonded acrylic expansion appliance or to a cemented Hyrax depending on the developmental stage of the dentition.
(3) In vitro metabolism of progesterone by hyrax whole blood, erythrocytes, or plasma in the presence or absence of NADPH was investigated.
(4) Centriole formation in male meiosis of the hyrax, Heterohyrax syriacus, and the Berdmore palm squirrel, Memetes berdmorei, was investigated by serial section analysis of selected regions of the seminiferous epithelium and isolated meiotic cells.
(5) Cine-x-ray (100 frames per second) was used to record feeding behavior in four adult hyraxes (Procavia syriacus), herbivores.
(6) Adult males from a colony of lesser rock hyrax found near the equator in Kenya exhibited an annual cycle of testicular activity characterized by intense spermatogenesis and elevated androgen status from May to July.
(7) After the operation the palatal expansion appliance (Biedermann-Hyrax-screw) was normally activated one one-quarter turn twice a day until the desired expansion was achieved.
(8) A notable resemblance between the hyrax and elephant sequences was observed, setting them apart from the ungulates, including whale.
(9) The perioral and intraoral representations are relatively large in SI of hyrax and exhibit considerable distortion.
(10) Radioimmunoassay and bioassay estimates of LH in hyrax pituitaries containing widely differing quantities of pituitary hormones were similar.
(11) As part of a study of the evolutionary development of the eye lens protein alpha-crystallin the 173-residue A chain of this protein has been studied in elephant, whale, hyrax and rhinoceros.
(12) However, with the exception of the elevated potassium levels observed in the cranial stomach, the hyrax poses no unusual osmotic or electrolyte concentrations when compared to man or other mammals.
(13) The findings showed the two-point RPEe was as efficient as the Hyrax in obtaining dental expansion of the maxillary posterior teeth with less effect on the maxillary anterior and mandibular teeth.
(14) This study uses a comparative approach to evaluate the role of footpad sweating on increasing friction, utilizing a variety of mammals which possess sweat glands on their footpads (rat, tenrec, hyrax, and dog).
(15) Restriction-fragment-length polymorphisms in mitochondrial DNA (mtDNA) were used to evaluate geographic population genetic structure in the rock hyrax, Procavia capensis, a species which occurs widely, though restricted to rocky habitat, throughout South Africa.
(16) Evidence of an annual testicular cycle contradicted the prevalent belief that equatorial hyrax breed all year and suggested that the testicular cycle is a conservative element of hyracoid reproductive strategy.
(17) For cutaneous leishmaniasis caused by Leishmania aethiopica, the hyrax and the giant rat are the proven reservoirs of the disease while several species of rodents have been demonstrated to harbor L. major.
(18) The following species were represented: red kangaroo, common tree shrew, Senegal-Galago, Demidoff's-Galago, brown howler monkey, woolly monkey, long-haired spider monkey, white-eared marmoset, chimpanzee, three-toed sloth, palm squirrel, red panda, fennec fox, tree hyrax and large-toothed hyrax.
(19) These results are a quantitative description of the coordination that exists during different feeding behaviors (ingestion, intraoral transport, mastication, and swallowing) in normal, freely functioning hyraxes.
(20) Sulci are reliable landmarks demarcating boundaries of SI in hyrax as they are in other mammals.