abstract：:Serial sections were used to map the ventrally positioned neurons of the anterior nerve cord of a 12.5-day amphioxus larva from the infundibular region to the end of somite 2. Synaptic patterns reveal five categories of descending pathways, four of which are associated with the ventral compartment (VC) motoneurons res...

journal_title：Journal of morphology

authors： Lacalli TC,Kelly SJ

更新日期：2003-08-01 00:00:00

abstract：:Interspecific variations in rhabdom structure between various oplophorid shrimps are described and the differences are related to the light environment at different depths within the mesopelagic zone. The ultrastructure of the distal rhabdom in these species is described for the first time. Quantitative measurements s...

journal_title：Journal of morphology

authors： Gaten E,Shelton PM,Nowel MS

更新日期：2003-07-01 00:00:00

abstract：:Acipenseriformes (sturgeon and paddlefish) are basal actinopterygians with a highly derived cranial morphology that is characterized by an anatomical independence of the jaws from the neurocranium. We examined the morphological and kinematic basis of prey capture in the Acipenseriform fish Scaphirhynchus albus, the pa...

journal_title：Journal of morphology

authors： Carroll AM,Wainwright PC

更新日期：2003-06-01 00:00:00

abstract：:The omphalallantoic placenta is a complex organ that is unique to viviparous squamates. Using transmission EM and light microscopy, we examined this placenta in garter snakes in order to understand its structural organization and functional capabilities. The omphalallantoic placenta is formed from the uterine lining a...

journal_title：Journal of morphology

authors： Blackburn DG,Lorenz RL

更新日期：2003-05-01 00:00:00

abstract：:Several flatfish species exhibit the unusual feature of bilateral asymmetry in prey capture kinematics. One species, Pleuronichthys verticalis, produces lateral flexion of the jaws during prey capture. This raises two questions: 1) How are asymmetrical movements generated, and 2) How could this unusual jaw mechanism h...

journal_title：Journal of morphology

authors： Gibb AC

更新日期：2003-04-01 00:00:00

abstract：:The orbital Harderian gland of the common tree shrew (Tupaia glis) was investigated at the macroscopic and microscopic levels. In the glands of both sexes only one acinar cell type was found. The cell is characterized by the presence of numerous lipid vacuoles of variable size and by a small number of PAS-positive, el...

journal_title：Journal of morphology

authors： Pradidarcheep W,Asavapongpatana S,Mingsakul T,Poonkhum R,Nilbu-nga S,Somana R

更新日期：2003-03-01 00:00:00

abstract：:Whole body studies of Plotosus tandanus revealed that ampullary pores occur over the entire body of the fish, but are in higher concentrations in the head region. These pores give rise to a short canal (50-60 microm) produced by columnar epithelial cells bound together by tight junctions and desmosomes. At the junctio...

journal_title：Journal of morphology

authors： Whitehead DL,Tibbetts IR,Daddow LY

更新日期：2003-02-01 00:00:00

abstract：:The development of two of the cranial lateral line canals is described in the cichlid, Archocentrus nigrofasciatus. Four stages of canal morphogenesis are defined based on histological analysis of the supraorbital and mandibular canals. "Canal enclosure" and "canal ossification" are defined as two discrete stages in l...

journal_title：Journal of morphology

authors： Tarby ML,Webb JF

更新日期：2003-01-01 00:00:00

abstract：:To elucidate the cellular mechanism underlying the growth of the peritoneal cover of the gut sinus and the heart in the polychaete Arenicola marina, cellular organization of these structures and proliferative potential of their cells were investigated using electron microscopy and electron microscopic autoradiography....

journal_title：Journal of morphology

authors： Martynova MG,Chaga OY

更新日期：2002-12-01 00:00:00

abstract：:The development of diet-induced phenotypic differences in numbers of sensilla on the antennae of the grasshopper Schistocerca americana was studied using the exuviae produced at each molt. This made it possible to follow changes within an individual insect. In the first instar, insects had similar numbers of four sens...

journal_title：Journal of morphology

authors： Chapman RF

更新日期：2002-11-01 00:00:00

abstract：:Although mating has been described in several hermit crab species, the mechanics of spermatophore transfer have not previously been demonstrated. Evidence from pleopod and gonopore morphology, video observations, and inseminated females indicates that in Clibanarius vittatus the male applies a spermatophoric mass dire...

journal_title：Journal of morphology

authors： Hess GS,Bauer RT

更新日期：2002-08-01 00:00:00

abstract：:We provide a detailed description of the larval morphology of the Great Basin spadefoot toad (Scaphiopus intermontanus), a species with documented morphological variability in larval structures associated with feeding. We based our findings on laboratory-raised individuals fed a herbivorous diet. We characterized the ...

journal_title：Journal of morphology

authors： Hall JA,Larsen JH Jr,Fitzner RE

更新日期：2002-05-01 00:00:00

abstract：:The morphogenesis and ultrastructure of the epidermis of snake embryos were studied at progressive stages of development through hatching to determine the time and modality of differentiation of the shedding complex. Scales form as symmetric epidermal bumps that become slanted and eventually very overlapped. During th...

journal_title：Journal of morphology

authors： Alibardi L

更新日期：2002-02-01 00:00:00

abstract：:The apical area of larvae of four primitive pulmonate species was investigated by means of serial ultrathin and light microscope sections. Cephalic sensory organs (CSOs) were found in the larvae of Onchidium cf. branchiferum (Onchidiidae) and Laemodonta octanfracta (Ellobiidae), while no trace of the organ was present...

journal_title：Journal of morphology

authors： Ruthensteiner B,Schaefer K

更新日期：2002-01-01 00:00:00

abstract：:To provide basic data about bone resorbing cells in the skeleton during the life cycle of Danio rerio, larvae, juveniles, and adults (divided into six age groups) were studied by histological procedures and by demonstration of the osteoclast marker enzyme tartrate-resistant acid phosphatase (TRAP). Special attention w...

journal_title：Journal of morphology

authors： Witten PE,Hansen A,Hall BK

更新日期：2001-12-01 00:00:00

abstract：:Cetacean middle ears are unique among mammals in that they have an elongated tympanic membrane, a greatly reduced manubrium mallei, and an incudal crus longum that is shorter than the crus breve. Elongation of the tympanic membrane and reduction of the manubrium is thought to be related to an evolutionary rotation of ...

journal_title：Journal of morphology

authors： Kinkel MD,Thewissen JG,Oelschläger HA

更新日期：2001-08-01 00:00:00

abstract：:The muscles, fin ray joints, and supporting structures underlying the dorsal fin are described for two seahorse species: Hippocampus zosterae and Hippocampus erectus. A fan-shaped array of cartilaginous bones, the pterigiophores, form the internal supporting structure of the dorsal fin. Each pterigiophore is composed ...

journal_title：Journal of morphology

authors： Consi TR,Seifert PA,Triantafyllou MS,Edelman ER

更新日期：2001-04-01 00:00:00

abstract：:The cytoarchitecture of nuclei in the preoptic area, ventral thalamus, dorsal thalamus, epithalamus, hypothalamus, posterior tuberculum, synencephalon, and pretectum and the accessory optic nuclei was analyzed in a perciform teleost, the sea bass Dicentrarchus labrax, by using serial sections stained with cresyl-viole...

journal_title：Journal of morphology

authors： Cerdá-Reverter JM,Zanuy S,Muñoz-Cueto JA

更新日期：2001-03-01 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：:As part of an effort to characterize reproductive modifications in internally inseminating catfishes, ovaries and male reproductive systems were examined histologically in two species of auchenipterid catfishes, Trachelyopterus lucenai and T. galeatus, from southeastern Brazil. Internal insemination was documented in ...

journal_title：Journal of morphology

authors： Downing Meisner A,Burns JR,Weitzman SH,Malabarba LR

更新日期：2000-11-01 00:00:00

abstract：:The present study examined the morphometric properties of the forelimb, including the inertial properties of the body segments and the morphometric parameters of 21 muscles spanning the shoulder and/or elbow joints of six Macaca mulatta and three M. fascicularis. Five muscle parameters are presented: optimal fascicle ...

journal_title：Journal of morphology

authors： Cheng EJ,Scott SH

更新日期：2000-09-01 00:00:00

abstract：:The cloacal complex of Crocodylus porosus is composed of three chambers (proctodaeum, urodaeum, and coprodaeum) separated by tight, muscular sphincters. The proctodaeum is proximal to the cloacal vent and houses the genitalia. The urodaeum is the largest chamber, is capable of storing large quantities of urine, and is...

journal_title：Journal of morphology

authors： Kuchel LJ,Franklin CE

更新日期：2000-08-01 00:00:00

abstract：:The function of the septomaxilla of nonmammalian synapsids has long been problematic. Distinctive features of this bone, including a prominent intranarial process and a septomaxillary canal and foramen, are characteristic of pelycosaurs and nonmammalian therapsids, but are lost in their mammalian descendants. Numerous...

journal_title：Journal of morphology

authors： Hillenius WJ

更新日期：2000-07-01 00:00:00

abstract：:The hypochord of the zebrafish embryo (Danio rerio) emerges at the 9-somite stage as a single row of cells in the dorsomedial endoderm immediately ventral to the notochord. It is recognizable from the 2(nd) or 3(rd) somite and extends along the trunk to the same extent as the somites. A basal lamina surrounds the hypo...

journal_title：Journal of morphology

authors： Eriksson J,Löfberg J

更新日期：2000-06-01 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：:An ultrastructural study was carried out on the secretory activity of the ectal mandibular gland in the wasp Polistes dominulus (foundress and worker females as well as males). Secretory activity in foundresses proceeds slowly during hibernation and early spring, becoming prominent in late spring and then falling shar...

journal_title：Journal of morphology

authors： Fortunato A,Turillazzi S,Delfino G

更新日期：2000-04-01 00:00:00

abstract：:In this descriptive study, we characterize the diaphragm and lungs of the short-nosed echidna, Tachyglossus aculeatus, using a combination of gross anatomical, light-microscopic, electron microscopic, and morphometric techniques, including airway casting. The diaphragm is inclined from ventro-cranial to dorso-caudal a...

journal_title：Journal of morphology

authors： Perry SF,Schmitz A,Andersen NA,Wallau BR,Nicol S

更新日期：2000-03-01 00:00:00

abstract：:The results of an ultrastructural investigation of the gastric glands of the ruin lizard are reported. In this reptile the stomach can be divided into a larger fundus and a smaller pars pilorica. Fundic glands are characterized by three main kinds of cells: mucous, endocrine, and oxynticopeptic; the latter were not ob...

journal_title：Journal of morphology

authors： Liquori GE,Ferri D,Scillitani G

更新日期：2000-02-01 00:00:00

abstract：:The study of the ileum of the ant Formica nigricans by light and electron microscopy revealed the existence of three differentiated regions: proximal, middle, and distal ileum. The middle region constitutes most of the length of the organ. Its wall is made up by a folded simple epithelium lined by a cuticle, which is ...

journal_title：Journal of morphology

authors： Villaro AC,Garayoa M,Lezaun MJ,Sesma P

更新日期：1999-12-01 00:00:00

abstract：:Larvae of sea stars are surrounded by an extracellular matrix called the hyaline layer. The lectin-binding properties of this matrix were investigated in an ultrastructural study of Patiriella species having different modes of development. The planktonic bipinnaria and brachiolaria of P. regularis and the planktonic b...

journal_title：Journal of morphology

authors： Cerra A

更新日期：1999-11-01 00:00:00

abstract：:The morphology of 16 occipital spines of the xenacanthid Orthacanthus from Upper Carboniferous deposits of Robinson (Kansas, USA), Nýran (Czech Republic) and Puertollano (Spain) is described. The nonreplaced spines reveal the growth pattern of the shark. Moreover, the relationship between growth and paleoenvironmental...

journal_title：Journal of morphology

authors： Soler-Gijón R

更新日期：1999-10-01 00:00:00

abstract：:The femoral or cloacal region of many species of lizards and amphisbaenians exhibits epidermal glands. The pores of these glands are plugged with holocrine solid secretions that serve as semiochemical sources. Many authors assume that these glands are mainly associated with reproduction and demarcation of territory. T...

journal_title：Journal of morphology

authors： Jared C,Antoniazzi MM,Silva JR,Freymüller E

更新日期：1999-09-01 00:00:00

abstract：:Formation of the first epidermal layers in the embryonic scales of the lizard Lampropholis guichenoti was studied by optical and electron microscopy. Morphogenesis of embryonic scales is similar to the general process in lizards, with well-developed overlapping scales being differentiated before hatching. The narrow o...

journal_title：Journal of morphology

authors： Alibardi L,Thompson MB

更新日期：1999-08-01 00:00:00

abstract：:The neuromuscular control of the hind limb of helmeted guineafowl (Numida meleagris) locomoting on a treadmill at 1.0 m/sec was analyzed using simultaneous electromyography (EMG) and cineradiography. Activity from 16 heads representing 14 hip and knee muscles was recorded and correlated with limb movement and myologic...

journal_title：Journal of morphology

authors： Gatesy SM

更新日期：1999-05-01 00:00:00

abstract：:Many studies in the genus Poecilia have focused on reproductive and genetic characteristics of Poecilia formosa, the Amazon molly, and its sympatric species P. latipinna and P. mexicana. The research literature of Poecilia dentition has been limited to general tooth morphology. Essentially absent are comparative analy...

journal_title：Journal of morphology

authors： Lewis SR,Rasch EM,Hossler FE,Kalbfleisch JH,Monaco PJ

更新日期：1999-03-01 00:00:00

abstract：:Postembryonic skeletal ontogeny of the pelobatid frog Scaphiopus intermontanus is described based on a developmental series of cleared-and-stained, whole-mount specimens. The focus is on laboratory-reared individuals fed a herbivorous diet as larvae. Although there is variation in the timing of ossification of individ...

journal_title：Journal of morphology

authors： Hall JA,Larsen JH Jr

更新日期：1998-11-01 00:00:00

abstract：:An extremely large number of fifth ceratobranchial teeth, with highly modified, striated, and hooked tips were observed in the central and western Pacific sicydiine goby genus Stiphodon.A scanning electron microscopic study of the form and arrangement of fifth ceratobranchial teeth was conducted to assess the distribu...

journal_title：Journal of morphology

authors： Parenti LR,Thomas KR

更新日期：1998-09-01 00:00:00

abstract：:Six locomotory muscles of wild common coots, Fulica atra, were analyzed histochemically. Capillarity and fiber-type distributions were correlated to the functional implications and physiological needs of each muscle. Leg muscles exhibit three unevenly distributed fiber types, a pattern that reflects the great variety ...

journal_title：Journal of morphology

authors： Torrella JR,Fouces V,Palomeque J,Viscor G

更新日期：1998-08-01 00:00:00

abstract：:Zambian common mole-rats are subterranean rodents that live in families with only one female breeding. Her offspring remain in the parental nest and do not reproduce. Behavioral experiments (Burda, '95) demonstrated that their apparent "sterility" is based on incest avoidance and individual recognition of family membe...

journal_title：Journal of morphology

authors： Willingstorfer WJ,Burda H,Winckler J

更新日期：1998-07-01 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