Contributions to the study of oviparity-viviparity transition: placentary structures of Liolaemus elongatus (Squamata: Liolaemidae).

abstract：:Neurosecretory (Nsy) cells within the cerebral ganglion of Lumbricus terrestris were classified ultrastructurally. The Nsy cells within the subesophageal ganglion, nerve cord ganglion, and the peripheral nervous system were also examined. A comparative survey of Nsy cells of four other species of oligochaetes, Eisenia...

journal_title：Journal of morphology

authors： Al-Yousuf S

更新日期：1988-07-01 00:00:00

abstract：:The lizard tail is well known for its ability to autotomize and regenerate. Physical contact of the tail by a predator may induce autotomy at the location at which the tail is grasped, and upon detachment the tail may undergo violent, rapid, and unpredictable movements that appear to be, to some degree, regulated by c...

journal_title：Journal of morphology

authors： Russell AP,Lai EK,Lawrence Powell G,Higham TE

更新日期：2014-09-01 00:00:00

abstract：:The morphology of the upper, lower, and pharyngeal jaws is very similar among American cichlids. Common conditions are: (1) the presence of a premaxillary dentigerous arm shorter than the ascending arm (exceptions are Astronotus, Cichla, and Crenicichla semifasciata), (2) a narrow coulter area; in contrast, a broad co...

journal_title：Journal of morphology

authors： Casciotta JR,Arratia G

更新日期：1993-07-01 00:00:00

abstract：:Hind foot drumming is a form of seismic signaling that plays a vital role in the communication of several Bathyergidae species. Hind foot drumming is initiated by the rapid movement of the whole hind limb by flexion and extension of the hip and knee. This study aimed to determine if morphological adaptations of the hi...

journal_title：Journal of morphology

authors： Sahd L,Bennett NC,Kotzé SH

更新日期：2020-04-01 00:00:00

abstract：:The antennal circulatory organ of Periplaneta americana and Blaberus craniifer was investigated by light and electron microscopy. This organ consists of two pulsatile ampullae located near the antennal base which are interconnected by a large transverse muscle and associated blood vessels which run into the antennae. ...

journal_title：Journal of morphology

authors： Pass G

更新日期：1985-08-01 00:00:00

abstract：:The larval development of "conchostracans" has received only scattered attention. Here I present the results of a study on the larval (naupliar) development and the metamorphosis of Lynceus brachyurus, a member of the bivalved branchiopod order the Laevicaudata. Lynceus brachyurus is the only species of the "Conchostr...

journal_title：Journal of morphology

authors： Olesen J

更新日期：2005-05-01 00:00:00

abstract：:Feeding mechanics of vertebrates depend on physical constraints of the surrounding media, water or air. Such functions are inseparably combined with form. The aim of this study is to show this linkage for the pleurodiran freshwater turtle Pelusios castaneus and, additionally, to point out the major functional and biom...

journal_title：Journal of morphology

authors： Lemell P,Beisser CJ,Weisgram J

更新日期：2000-05-01 00:00:00

abstract：:The olfactory system of the pigeon (Columba livia) was examined. Our electrophysiological and experimental neuroanatomical (Fink-Heimer technique) data showed that axons from the olfactory bulb terminated in both sides of the forebrain. The cortex prepiriformis (olfactory cortex), the hyperstriatum ventrale and the lo...

journal_title：Journal of morphology

authors： Rieke GK,Wenzel BM

更新日期：1978-10-01 00:00:00

abstract：:Bone is a dynamic tissue adapting to loading according to "Wolff's law of bone adaptation." During very early life, however, such a mechanism may not be adequate enough to adapt to the dramatic change in environmental challenges in precocial species. Their neonates are required to stand and walk within hours after bir...

journal_title：Journal of morphology

authors： Gorissen BM,Wolschrijn CF,van Vilsteren AA,van Rietbergen B,van Weeren PR

更新日期：2016-07-01 00:00:00

abstract：:The purpose of this study was to find out whether the microstructure of the highly permeable skin of heat-acclimated pigeons allowing increased evaporative cooling differs from the skin of pigeons in the non-acclimated or cold-acclimated state. In addition, the correlation between epidermal morphology and cutaneous wa...

journal_title：Journal of morphology

authors： Peltonen L,Arieli Y,Pyörnilä A,Marder J

更新日期：1998-01-01 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

authors： Benedict CV,Waite JH

更新日期：1986-09-01 00:00:00

abstract：:This work is concerned with the ultrastructural organization and some histochemical features of the vacuolar cells of the demosponge Oscarella lobularis. Vacuolar cells are characterized by large clear vacuoles containing an aqueous fluid. They are commonly found in the mesohyl of this sponge and tend to constitute a ...

journal_title：Journal of morphology

authors： Gaino E,Burlando B,Buffa P

更新日期：1986-04-01 00:00:00

abstract：:A biomechanical model of the jaw mechanism in some reptiles is presented. Symmetrical muscle activity that produces equal forces on both sides of the head is assumed. The model predicts the position of the most posterior bit point and offers a functional explanation for this prediction. Turtles are used to illustrate ...

journal_title：Journal of morphology

authors： Druzinsky RE,Greaves WS

更新日期：1979-05-01 00:00:00

abstract：:The ultrastructure of a well studied insect chemosensory unit is presented in this report. Two separate lumina are present in this chemosensory unit, the trichogen and sensillar lumina. The fluid within the trichogen lumen exclusively bathes the dendritic terminals, and may be involved with the reception and/or modula...

journal_title：Journal of morphology

authors： Felt BT,Vande Berg JS

更新日期：1976-11-01 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

authors： Rossie JB

更新日期：2006-01-01 00:00:00

abstract：:Timed-sequence studies have shown that reticulate scales on the ventral footpads of birds do not undergo "epidermal placode" formation during their morphogenesis, but arise as symmetrical evaluations similar to the scales of snakes and lizards. Unlike the scutellate scales on the dorsal surface of the foot, in which t...

journal_title：Journal of morphology

authors： Sawyer RH,Craig KF

更新日期：1977-10-01 00:00:00

abstract：:All developmental stages of Tanystylum bealensis are described. This is the first complete developmental series of a pycnogonid species collected from a natural, rather than a laboratory-reared population. Development proceeds through a series of nine instars from egg to adult, with major defining characteristics of t...

journal_title：Journal of morphology

authors： Gillespie JM,Bain BA

更新日期：2006-03-01 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

authors： Sarkar S,Sarkar NK,Maiti BR

更新日期：1995-04-01 00:00:00

abstract：:Changes in body morphology during growth and reproduction in the hydromedusa Eleutheria dichotoma are described in terms of variations in eight different characters: umbrella diameter, total surface area, tentacle area, umbrella area, tentacle knob diameter, number of embryos, and diameter and area of buds. Sexually (...

journal_title：Journal of morphology

authors： Schierwater B

更新日期：1989-06-01 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

authors： Alibardi L,Maurizii MG,Taddei C

更新日期：2000-12-01 00:00:00

abstract：:Larval and juvenile air breathing fish may experience nocturnal and/or seasonal aquatic hypoxia. Yet, whether hypoxia induces respiratory developmental plasticity in larval air breathing fish is uncertain. This study predicted that larvae of two closely related anabantid fish-the facultative air breather the Siamese f...

journal_title：Journal of morphology

authors： Mendez-Sanchez JF,Burggren WW

更新日期：2019-02-01 00:00:00

abstract：:The three-dimensional structure of the organ of Bellonci in the marine amphipod Gammarus setosus and the relationship between its sensory cells and concretion are described using light, transmission, and scanning electron microscopy, with chemical treatment for cell lysis, calcium chelation, glycogen staining, and lan...

journal_title：Journal of morphology

authors： Steele VJ

更新日期：1984-07-01 00:00:00

abstract：:Stauromedusae have relatively few macromorphological characters, making both their taxonomy and identification difficult. For this reason, histological characters are also employed in the taxonomy of the group. This study presents a detailed description of the histomorphology of Haliclystus antarcticus Pfeffer, 1889 (...

journal_title：Journal of morphology

authors： Miranda LS,Collins AG,Marques AC

更新日期：2013-12-01 00:00:00

abstract：:The morphology of the musculature and connective tissues of the arms of Octopus bimaculoides was analyzed with light microscopy. We also studied O. briareus and O. digueti, which possess relatively more elongate and less elongate arms, respectively. The morphology of the arms was found to be remarkably uniform among s...

journal_title：Journal of morphology

authors： Kier WM,Stella MP

更新日期：2007-10-01 00:00:00

abstract：:This work summarizes the observations on 30 species of microdriles belonging to the families Naididae (Rhyacodrilinae, Pristininae, Naidinae, Phallodrilinae, and Tubificinae), Phreodrilidae, Lumbriculidae, and Enchytraeidae using scanning electron microscopy. The lumbricid Eiseniella tetraedra, a megadrile species com...

journal_title：Journal of morphology

authors： Caramelo C,Martínez-Ansemil E

更新日期：2010-12-01 00:00:00

abstract：:Tadpoles of several different genera were fed graded suspensions of uniform polystyrene particles to determine the lower size limit of particles that could be ingested. Certain tadpoles can extract suspended particles as small as 0.126 μ in diameter from the water. In terms of particle size, this is an efficiency comp...

journal_title：Journal of morphology

authors： Wassersug R

更新日期：1972-07-01 00:00:00

abstract：:The mouthparts of female Corethrella brakeleyi and C. wirthi were studied using light and electron microscopy. Mandibles, hypopharynx and labium are highly sclerotized and are modified for obtaining blood meals. All structures were larger in C. brakeleyi than in C. wirthi except mandibular and hypopharyngeal teeth; th...

journal_title：Journal of morphology

authors： McKeever S,Pound JM

更新日期：1979-08-01 00:00:00

abstract：:Odontophoral cartilages are located in the molluscan buccal mass and support the movement of the radula during feeding. The structural diversity of odontophoral cartilages is currently known only from limited taxa, but this information is important for interpreting phylogeny and for understanding the biomechanical ope...

journal_title：Journal of morphology

authors： Golding RE,Ponder WF,Byrne M

更新日期：2009-05-01 00:00:00

abstract：:The larvae of Halicryptus spinulosus bear six rings of sensory/ locomotory appendages. Twelve pedicellate flosculi, 6 dorsal and 6 ventral, are associated with the neck-lorica junction. Newly described are two rows of 4-5 flosculi present on the dorsal and ventral plates, and 2 tubuli located on each dorsolateral and ...

journal_title：Journal of morphology

authors： Storch V,Higgins RP

更新日期：1991-11-01 00:00:00

abstract：:The fine structure of the mid-gut musculature of the desert locust, Schistocerca gregaria is described and compared with that of the visceral muscles of other species. The gross morphology and fine structure of the nervous system which supplies the mid-gut muscle fibres is described. ...

journal_title：Journal of morphology

authors： Anderson M,Cochrane DG

更新日期：1978-05-01 00:00:00