Abstract：
:The external surface of the cornea and adjacent epidermis of larvae in representative developmental stages and of adult frogs, Rana pipiens, was studied by scanning electron microscopy. Surface cells are polygonal, usually hexagonal, in outline and covered with microprojections. During larval development prior to metamorphic stages, neither eyelids nor Harderian glands have developed; microprojections on the corneal surface are high and branched, and cell boundaries are elevated. On the anterior portion of the cornea and on the epidermis near the eye, the surface pattern is less dense, and ciliated cells are present. During metamorphic stages, corneal cell boundaries become less prominent and the pattern of microprojections more variable and markedly different from that of larvae of earlier stages. Corneal cells have a spongy appearance, are covered by a coating material, or are characterized as light or dark based on their brightness and surface texture. As eyelids develop in metamorphic stages XX-XXI, the numbers of ciliated cells increase dramatically, both on the corneal surface and on the edges of the developing lids. In later metamorphic stages XXII-XXV, lids and Harderian glands become well-developed, and cilia are no longer observed. The adjacent epidermal surface becomes devoid of cilia but perforated by openings of cutaneous glands. Its spongy appearance is similar to that of both the cornea and neighboring epidermis of the mature frog. Changes in corneal surface features are probably metamorphic events associated with development of lids and Harderian glands and a shift from an aqueous to an air environment.
journal_name
J Morpholjournal_title
Journal of morphologyauthors
Kaltenbach JC,Harding CV,Susan Sdoi
10.1002/jmor.1051660305subject
Has Abstractpub_date
1980-12-01 00:00:00pages
323-35issue
3eissn
0362-2525issn
1097-4687journal_volume
166pub_type
杂志文章abstract：:This study describes the male reproductive cycle of Sibynomorphus mikanii from southeastern Brazil considering macroscopic and microscopic variables. Spermatogenesis occurs during spring-summer (September-December) and spermiogenesis or maturation occurs in summer (December-February). The length and width of the kidne...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.20099
更新日期：2013-02-01 00:00:00
abstract：:The usual pigmentation pattern in mammalian skin consists of fixed melanocytes in the basal layer of the epidermis, supplying keratinocytes with melanosomes. We observed that the glabrous skin (rhinaria and footpads) of dogs deviates from this pattern. In dogs, melanocytes are found in both the dermis and epidermis. T...
journal_title：Journal of morphology
pub_type： 杂志文章
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更新日期：2018-08-01 00:00:00
abstract：:All extant members of Phocoenidae (porpoises) have been characterized as pedomorphic based on skeletal characters. To investigate the ontogenetic background for pedomorphosis and assess interspecific differences in ontogeny among phocoenids, samples of the six extant species were compared in terms of development of bo...
journal_title：Journal of morphology
pub_type： 杂志文章
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更新日期：2011-02-01 00:00:00
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journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.10414
更新日期：2006-04-01 00:00:00
abstract：:Gross lung morphology is examined in representative species from four genera within the order Lagomorpha (Lepus californicus, Sylvilagus nuttalli, Oryctolagus cuniculus, Ochotona princeps), and compared with a representative rodent out-group (Spermophilus richardonsii). Examination of pulmonary morphology reveals seve...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/(SICI)1097-4687(199612)230:3<299::AID-JMOR
更新日期：1996-12-01 00:00:00
abstract：:As part of a study of ulcer formation and healing, regeneration of colonic mucosa in rats was studied following placement of a surgical lesion. Alterations in mucosubstances and connective tissue were examined and their possible significance discussed. The sequence of events in healing was: 1) The mucosa adjacent to t...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.1051630208
更新日期：1980-02-01 00:00:00
abstract：:Recent molecular phylogenies conflict with traditional scleractinian classification at ranks ranging from suborder to genus, challenging morphologists to discover new characters that better agree with molecular data. Such characters are essential for including fossils in analyses and tracing evolutionary patterns thro...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.10899
更新日期：2011-01-01 00:00:00
abstract：:Mature spermatozoa from spermathecae of founding queens were obtained from 5 species of ants, representing the major subfamilies Myrmicinae (Acromyrmex versicolor, Crematogaster sp.) and Dolichoderinae (Tapinoma sessile, Conomyrma insana, Conomyrma wheeleri). The ultrastructure of ant spermatozoa has many features in ...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.1052060311
更新日期：1990-12-01 00:00:00
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journal_title：Journal of morphology
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更新日期：2017-05-01 00:00:00
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journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.20185
更新日期：2013-12-01 00:00:00
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journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.20912
更新日期：2019-01-01 00:00:00
abstract：:Scanning electron and light microscopic studies reveal significant changes in the endometrial histophysiology of the soft-shelled turtle Lissemys punctata punctata during its seasonal reproductive cycle. Scanning electron microscopy shows the entire oviductal mucosa to be only slightly folded throughout the non-breedi...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.1052240102
更新日期：1995-04-01 00:00:00
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journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.1051470306
更新日期：1975-11-01 00:00:00
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journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.1051920303
更新日期：1987-06-01 00:00:00
abstract：:The tectorial structures of the inner ear of the proteid salamander Proteus anguinus were studied with transmission and scanning electron microscopy in order to analyze the ultrastructure of the otoconial membranes and otoconial masses of the maculae and the tectorial membrane of the papilla amphibiorum. Both otoconia...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.1052010106
更新日期：1989-07-01 00:00:00
abstract：:Data describing segmental masses and moments of inertia (MOI) of limb segments are required for inverse dynamic calculations. In horses, these values are usually calculated using regression equations that have been developed from a limited number of horses representing a small number of breeds. The objective of the pr...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.20829
更新日期：2018-07-01 00:00:00
abstract：:The SEM was used to study the development of respiratory structures in successive stages in relation to the overall changes occurring in the scorpions. Book lung development is a slow process, starting with spiracles and a sac-like atrium in the early embryo and continuing lamellar formation to 150 or more in the adul...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.10653
更新日期：2008-09-01 00:00:00
abstract：:Iridescent butterfly scales are structurally colored, relying upon the interaction of light with detailed architecture to produce their color. In some iridescent scales, the reflective elements are contained within the body of the scale and come in two basic forms, lattices that produce diffraction colors (analogous t...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.1052020106
更新日期：1989-10-01 00:00:00
abstract：:Three regions of the byssus of the marine mussel Mytilus edulis L. are distinct in structural organization at the macroscopic and microscopic level and in amino acid composition. The threads that emanate from the stem at the base of the foot are divided into two regions. The proximal, elastic region has a crimped, den...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.1051890305
更新日期：1986-09-01 00:00:00
abstract：:The identity and taxonomic distribution of paranasal sinuses among living platyrrhines has remained a contentious issue (e.g., Cave [1967] Am J Phys Anthropol 26:277-288 vs. Hershkovitz [1977] Chicago: University of Chicago Press) largely because the ontogenetic data required for their detection and identification (e....
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.10263
更新日期：2006-01-01 00:00:00
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journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.10302
更新日期：2006-10-01 00:00:00
abstract：:Amphisbaenians are fossorial, predominantly limbless squamate reptiles with distinct cranial shapes corresponding to specific burrowing behaviors. Due to their cryptic lifestyles and the scarcity of museum specimens, little is known of their intraspecific variation, particularly regarding cranial osteology. This repre...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.20564
更新日期：2016-09-01 00:00:00
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journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.20647
更新日期：2017-03-01 00:00:00
abstract：:Light and electron microscopic examination demonstrated two types of non-endocrine agranular cells, cavity boundary cells and stellate cells, in the adenohypophysis of the South American lungfish, Lepidosiren paradoxa. The cavity boundary cells line the hypophyseal cleft and diverticulum and display few microvilli, oc...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.1052070109
更新日期：1991-01-01 00:00:00
abstract：:Internal and external head structures of males of Strepsiptera were examined and the head of a species of Mengenilla is described in detail. The results suggest a reinterpretation of some structures. The head of basal extant strepsipterans is subprognathous, whereas it is strictly orthognathous in the groundplan of St...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.10261
更新日期：2006-05-01 00:00:00
abstract：:The orientation of the semicircular canals of the inner ear in the skull of vertebrates is one of the determinants of the capacity of this system to detect a given rotational movement of the head. Past functional studies on the spatial orientation of the semicircular canals essentially focused on the lateral semicircu...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.20665
更新日期：2017-05-01 00:00:00
abstract：:The cytoarchitecture and neuronal morphology of the torus semicircularis in the red-eared turtle, Chrysemys scripta elegans, were examined in Nissl-stained and Golgi-impregnated material. The torus semicircularis begins in the caudodorsal mesencephalon and extends rostrally and laterally to end ventrally to the tectal...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.1051690207
更新日期：1981-08-01 00:00:00
abstract：:We investigated if and how the inner ear region undergoes similar adaptations in small, fossorial, insectivoran-grade mammals, and found a variety of inner ear phenotypes. In our sample, afrotherian moles (Chrysochloridae) and the marsupial Notoryctes differ from most other burrowing mammals in their relatively short ...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.20391
更新日期：2015-08-01 00:00:00
abstract：:Using immunocytochemistry at light- and electron-microscope levels, we studied the distribution of three monoclonal antibodies (AE1, AE2, AE3) specific for mammalian alpha-keratins in regenerating lizard epidermis. We also characterized the keratins expressed during this process by immunoblotting after electrophoretic...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/1097-4687(200012)246:3<179::AID-JMOR2>3.0.
更新日期：2000-12-01 00:00:00
abstract：:Bristle positions in two rows of bristles on the basitarsus of the second leg of the fruitfly Drosophila melanogaster were analyzed in order to determine the accuracy of bristle placement within these rows. Within each row the positions of the two terminal bristles were found to be approximately equally variable, and ...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.1051780203
更新日期：1983-11-01 00:00:00
