Interspecific variations in the morphology and ultrastructure of the rhabdoms of oplophorid shrimps.

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：:Zebra Finches (Taeniopygia guttata) are the most commonly used laboratory songbird species, yet their embryological development has been poorly characterized. Most studies to date apply Hamburger and Hamilton stages derived from chicken development; however, significant differences in development between precocial and...

journal_title：Journal of morphology

authors： Murray JR,Varian-Ramos CW,Welch ZS,Saha MS

更新日期：2013-10-01 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 sequential changes during spermatogenesis in the testis of two species of caecilians, Ichthyophis tricolor (Ichthyophiidae) and Uraeotyphlus cf. narayani (Uraeotyphliidae), of Western Ghats of Kerala, India, were traced using both histological techniques and transmission electron microscopy. The cell nests were as...

journal_title：Journal of morphology

authors： Smita M,Oommen OV,Jancy MG,Akbarsha MA

更新日期：2004-07-01 00:00:00

abstract：:The skull of the rare bolyeriid snake Casarea dussumieri is described in detail based on high-resolution X-ray CT data. Bolyeriids are unique in their possession of a separate suborbital ossification and a maxilla subdivided into two movably jointed parts, which may be the result of paedomorphic truncation of the deve...

journal_title：Journal of morphology

authors： Maisano JA,Rieppel O

更新日期：2007-05-01 00:00:00

abstract：:The paired tubular accessory glands in Haemaphysalis longicornis open at the junction of the cervical and the vestibular parts of vagina via short and narrow ducts. The pseudostratified columnar glandular epithelium covered by the muscle layer consists of both secretory and supporting cells. As feeding proceeds, the s...

journal_title：Journal of morphology

authors： Kakuda H,Koga T,Mori T,Shiraishi S

更新日期：1994-07-01 00:00:00

abstract：:The uptake and retention of radiolabeled estradiol by both the male and female reproductive organs were examined in the baboon. Two male and two female baboons were injected intracardially with 1 microgram/kg body weight of 3H-estradiol and two animals, one male and one female, were injected with both labeled and 100 ...

journal_title：Journal of morphology

authors： Weaker FJ,Sheridan PJ

更新日期：1982-05-01 00:00:00

abstract：:Sensory epithelia of the oral tube, a fungiform body anterior to the tentacles and of the terminal knob of tentacles, were studied in Ovatella myosotis by electron microscopy. All three epithelia consist of columnar support cells, sensory cells, and, except in the oral tube, numerous goblet cells. The epithelia differ...

journal_title：Journal of morphology

authors： Wondrak G

更新日期：1984-09-01 00:00:00

abstract：:The sagittal otolith of Hyperoglyphe antarctica (Centrolophidae: Teleostei) has a prismatic structure in which the anti-sulcal growth axes of each prism consist of a series of nested cones each composed of a mineral layer followed by an organic matrix layer. Broken sections show the mineral layers to be composed of st...

journal_title：Journal of morphology

authors： Gauldie RW,Xhie J

更新日期：1995-02-01 00:00:00

abstract：:Sipuncula is a clade of unsegmented marine worms that are currently placed among the basal radiation of conspicuously segmented Annelida. Their new location provides a unique opportunity to reinvestigate the evolution and development of segmented body plans. Neural segmentation is clearly evident during ganglionic ven...

journal_title：Journal of morphology

authors： Carrillo-Baltodano AM,Boyle MJ,Rice ME,Meyer NP

更新日期：2019-11-01 00:00:00

abstract：:The cuticle-lined foregut of Derocheilocaris remanei consists of the mouth with its associated labrum, and an undifferentiated esophagus. It is separated from the midgut by an esophageal valve. The labrum is a conspicuous structure moved by five pairs of muscles (four dorsoventral and one longitudinal). Four pairs of ...

journal_title：Journal of morphology

authors： Herrera-Alvarez L,Fernández I,Benito J,Pardos F

更新日期：1996-11-01 00:00:00

abstract：:The study of semithin (1 μ in thickness) and thin sections of Epon-embedded material reveals that Malpighian tubules of Formica polyctena are composed of a single cellular type throughout their length. No differentiated regions were observed. Ultrastructural traits of the epithelial cells are those of highly metabolic...

journal_title：Journal of morphology

authors： Garayoa M,Villaro AC,Montuenga L,Sesma P

更新日期：1992-11-01 00:00:00

abstract：:Transmission electron micrographs show the branchial epithelium of the ascidian Ciona intestinalis to be composed of three kinds of cells: ciliated, parietal, and "dark." Absorptive processes of phagocytosis appear in ciliated and parietal cells; moreover, apocrine-like secretion is evident exclusively in the parietal...

journal_title：Journal of morphology

authors： Pestarino M,Fiala-Medioni A,Ravera F

更新日期：1988-09-01 00:00:00

abstract：:The common snook, Centropomus undecimalis, was induced to ovulate using a time-release, GnRH analogue. Ovulation occurred the afternoon or evening the day after hormone administration. The time of ovulation was established within half an hour. At ovulation, three fish per time-group were divided into 0, 6, 12, 18 hr a...

journal_title：Journal of morphology

authors： Grier HJ,Neidig CL,Quagio-Grassiotto I

更新日期：2017-04-01 00:00:00

abstract：:The aim of this work was to study the postnatal ontogenetic development of Pontoporia blainvillei skull, identifying major changes on shape, and relating them to relevant factors in the life history of the species. We analyzed a complete ontogenetic series (73♂, 83♀) with three-dimensional geometric morphometric techn...

journal_title：Journal of morphology

authors： del Castillo DL,Flores DA,Cappozzo HL

更新日期：2014-12-01 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：:Little is known about specific proteins involved in keratinization of the epidermis of snakes. The presence of histidine-rich molecules, sulfur, keratins, loricrin, transglutaminase, and isopeptide-bonds have been studied by ultrastructural autoradiography, X-ray microanalysis, and immunohistochemistry in the epidermi...

journal_title：Journal of morphology

authors： Alibardi L

更新日期：2005-05-01 00:00:00

abstract：:Body length is one of the most important factors that influence organismal function and ecological niche. Although larger animals tend to have a suite of physiological advantages, such as lower mass-specific metabolic rates and lower costs of transport, they may also experience significant limitations to unsteady loco...

journal_title：Journal of morphology

authors： Kahane-Rapport SR,Goldbogen JA

更新日期：2018-09-01 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

authors： Chiba A,Oka S,Honma Y,Ishiyama M

更新日期：1991-01-01 00:00:00

abstract：:The spinotectal somatosensory projection was compared in normal, genetically eyeless, and embryonically manipulated salamanders. In normal animals, serotonin fluorescence was restricted to the intermediate tectalneuropil. This same region showed both high levels of serotonin uptake and somatosensory single unit electr...

journal_title：Journal of morphology

authors： Gruberg ER,Harris WA

更新日期：1981-10-01 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 plainfin midshipman fish Porichthys notatus has both inter- and intra-sexual dimorphism in the sound-producing (vocal or sonic) muscles attached to the swimbladder wall. The "Type I" and "Type II" male morphs differ in that dramatic structural changes related to sexual maturity occur in the mass, the area of mitoc...

journal_title：Journal of morphology

authors： Brantley RK,Marchaterre MA,Bass AH

更新日期：1993-06-01 00:00:00

abstract：:The ovarian follicles of Ctenosaura pectinata exhibit a clear seasonal cycle in morphology. Early in development, each oocyte is surrounded by a granulosa composed of a single layer of cuboidal or squamous cells and thin thecal layers. As folliculogenesis progresses, the granulosa becomes multilayered and composed of ...

journal_title：Journal of morphology

authors： Uribe MDCA,B GLP,Guillette LJ Jr

更新日期：1996-10-01 00:00:00

abstract：:Oogenesis in the silkworm, Bombyx mori, was studied by light and electron microscopy of sections of resin-embedded follicles. The development of the follicles was divided into a series of 12 distinctive stages based on various morphological criteria. Structural changes in the oocyte, nurse cells, and follicle cells ar...

journal_title：Journal of morphology

authors： Yamauchi H,Yoshitake N

更新日期：1984-01-01 00:00:00

abstract：:Oribatida are one of the main groups of Acari comprising mostly important decomposers in soils. Most species are particle feeders, an exceptional mode of nutrition in Arachnida. Hence, their feeding organs, the gnathosoma, are of special functional interest. We studied nearly all components using scanning and transmis...

journal_title：Journal of morphology

authors： Alberti G,Heethoff M,Norton RA,Schmelzle S,Seniczak A,Seniczak S

更新日期：2011-09-01 00:00:00

abstract：:Sabellid and sabellariid polychaetes are regarded as sister groups in a number of recent phylogenetic analyses. This is based mainly on a shared specific arrangement of chaetae referred to as chaetal inversion. Remarkably, the uncini have a notopodial position in the abdomen, whereas capillary chaetae occur in the neu...

journal_title：Journal of morphology

authors： Kieselbach D,Hausen H

更新日期：2008-01-01 00:00:00

abstract：:Adult female white-footed mice, Peromyscus leucopus, were exposed to long (LP) or short (SP) photoperiods for 6 weeks (experiment I). Another group of animals was kept for 6 weeks in SP, then injected SC with 30 micrograms prolactin twice daily for 2, 3, 4, or 6 days (experiment II). Ovaries from the mice in both expe...

journal_title：Journal of morphology

authors： Spanel-Borowski K,Bartke A,Petterborg LJ,Reiter RJ

更新日期：1983-05-01 00:00:00

abstract：:It is well established that the capacity for teeth to differentiate "in vitro" depends upon: a) the age of the embryonic rudiments at the time of excision and b) the number of cells within each tissue type which are capable of differentiating into organ culture. This paper studies ultrastructural aspects of tooth buds...

journal_title：Journal of morphology

authors： Lemus D,Paz de la Vega Y,Fuenzalida M,Illanes J

更新日期：1980-09-01 00:00:00

abstract：:We hypothesized that due to the relative conductivity of the environment, and to maintain sensory function, ampullary organs of marine Neoarius graeffei would differ morphologically from those described previously for estuarine and freshwater conspecifics. Unlike the ampullary systems of N. graeffei from freshwater an...

journal_title：Journal of morphology

authors： Gauthier AR,Whitehead DL,Bennett MB,Tibbetts IR

更新日期：2015-09-01 00:00:00

abstract：:The fine structure of midgut cells in two species of Cladocera (Crustacea: Branchiopoda) has unique features when it is compared to that in the midguts of other arthropods. Features which suggest that food is absorbed in digested form are: the presence of the peritrophic membrane, the glycocalyx, the almost complete a...

journal_title：Journal of morphology

authors： Quaglia A,Sabelli B,Villani L

更新日期：1976-11-01 00:00:00