External features of the developing embryo of the stonefly, Kamimuria tibialis (pictet) (plecoptera, perlidae).

abstract：:Several muroid rodent species are distributed throughout southern Africa. Some species are reportedly classified as opportunistic omnivorous rodents consuming plant, seed, and insect material. This study aims to provide a detailed morphometric analysis of the gastrointestinal tract (GIT) of four such omnivorous specie...

journal_title：Journal of morphology

authors： Henke Z,Sahd L,Matthee S,Kotzé SH

更新日期：2018-09-01 00:00:00

abstract：:The feeding mechanisms of two labrid fishes (Cheilinus chlorurus and C. diagrammus: Labridae: Perciformes) are modeled using four-bar linkage theory from mechanical engineering. The actions of the feeding mechanisms are simulated by a computer program that uses morphometric data to calculate the geometry of mechanism ...

journal_title：Journal of morphology

authors： Westneat MW

更新日期：1990-09-01 00:00:00

abstract：:Developmental studies of the Recent Australian lungfish, Neoceratodus forsteri, show that this species has two sets of functional tooth-bearing bones in the lower jaw of young hatchlings. These coincide with an early stage in the life history when the fish is strictly carnivorous. In N. forsteri, a paired tooth-bearin...

journal_title：Journal of morphology

authors： Kemp A

更新日期：1995-09-01 00:00:00

abstract：:This study reports a comprehensive description of penaeid spermatogenesis (Penaeus monodon) by light and transmission electron microscopy. A conspicuous characteristic of spermatocytogenesis was a ring-like structure with high electron-density adjacent to the nucleus of a primary spermatocyte. During the spermiogenesi...

journal_title：Journal of morphology

authors： Feng T,Paterson B,Johnston SD

更新日期：2017-05-01 00:00:00

abstract：:The vertebrate head as a major novelty is directly linked to the evolutionary success of the vertebrates. Sequential information on the embryonic pattern of cartilaginous head development are scarce, but important for the understanding of its evolution. In this study, we use the oriental fire bellied toad, Bombina ori...

journal_title：Journal of morphology

authors： Lukas P,Olsson L

更新日期：2020-06-01 00:00:00

abstract：:Nematocytes containing microbasic mastigophores are intimately associated with accessory cells in the epidermis of Chironex fleckeri. Large microbasic mastigophores may be surrounded by seven to nine such cells. Each accessory cell possesses an apical portion containing secretory droplets and a basal portion which car...

journal_title：Journal of morphology

authors： Rifkin JF,Endean R

更新日期：1988-01-01 00:00:00

abstract：:The fate and possible roles of the cytoskeleton in the process of conjugation in the hyptrich ciliate Euplotes aediculatus were investigated. Following the coalescence of the plasma membranes of the conjugant cells, a fusion zone or bridge of cytoplasm contributed by both partners is constructed. The sub-alveolar micr...

journal_title：Journal of morphology

authors： Geyer JJ,Kloetzel JA

更新日期：1987-04-01 00:00:00

abstract：:Data from adult birds, crocodilians, Sphenodon, squamates, turtles, and from the chick embryo are compared to test conflicting hypotheses of homology of the deep dorsal thigh muscles of birds and other reptiles. This comparison suggests that: (1) avian Mm. iliofemoralis externus and iliotrochantericus caudalis (herein...

journal_title：Journal of morphology

authors： Rowe T

更新日期：1986-09-01 00:00:00

abstract：:The theory of Kukalova-Peck ('78) is examined and rejected except for the hypothesis of the partially pleural origin of wings. Data suggest that the arthropods ancestral to insects left the water, and that movable precursors of the wings, possibly exopodites, were immobilized and fused with the tergum to form part of ...

journal_title：Journal of morphology

authors： Rasnitsyn AP

更新日期：1981-06-01 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：:This study examines the allometric scaling relationships of the cetacean humerus, radius, and ulna. Bone lengths and diameters were measured for 20 species of odontocete and three species of mysticete cetaceans, representing eight of the nine extant cetacean families. The scaling of individual bone proportions (bone l...

journal_title：Journal of morphology

authors： Dawson SD

更新日期：1994-11-01 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：: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：:Asymmetrical monorchy, or the complete absence of one testis coupled with the presence of its bilateral counterpart, is reported for 174 species of the carabid beetle tribes Abacetini, Harpalini, and Platynini (Insecta: Coleoptera: Carabidae) based on a survey of over 820 species from throughout the family. This condi...

journal_title：Journal of morphology

authors： Will KW,Liebherr JK,Maddison DR,Galián J

更新日期：2005-04-01 00:00:00

abstract：:The latest research on direct developing caecilian and anuran species indicate presence of only one generation of taste organs during their ontogeny. This is distinct from indirect developing batrachians studied thus far, which possess taste buds in larvae and anatomically distinct taste discs in metamorphs. This stud...

journal_title：Journal of morphology

authors： Budzik KA,Żuwała K,Kerney R

更新日期：2016-07-01 00:00:00

abstract：:The brain-microvascular architecture of the newt (Triturus cristatus carnifex) was studied by scanning electron-microscopical examination of microvascular corrosion casts. It is characterized at the leptomeningeal level by a superficial network of single vessels that leave the meningeal sheath to form hairpin-shaped c...

journal_title：Journal of morphology

authors： Lazzari M,Ciani F,Franceschini V

更新日期：1991-12-01 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：: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：:Micrabaciids are solitary, exclusively azooxanthellate deep-sea corals belonging to one of the deepest-living (up to 5,000 m) scleractinian representatives. All modern micrabaciid taxa (genera: Letepsammia, Rhombopsammia, Stephanophyllia, Leptopenus) have a porous and often very fragile skeleton consisting of two main...

journal_title：Journal of morphology

authors： Janiszewska K,Stolarski J,Benzerara K,Meibom A,Mazur M,Kitahara MV,Cairns SD

更新日期：2011-02-01 00:00:00

abstract：:Salamanders possess kidneys with two distinct regions: a caudal pelvic portion and cranial genital portion. Nephrons of the pelvic region are responsible for urine formation and transport. Nephrons of the genital region transport sperm from testes to Wolffian ducts; however, nephrons of the genital region possess all ...

journal_title：Journal of morphology

authors： Hartley J,Gribbins KM,Siegel DS

更新日期：2019-10-01 00:00:00

abstract：:During the long starvation period (November to June) of the lizard (Varanus exanthematicus), pancreatic B cells undergo profound modification. The degeneration of beta granules observed in electron microscopy appears correlated with the diminution of the immunoreactive insulin-like content of the pancreas. The analogy...

journal_title：Journal of morphology

authors： Godet R,Mattei X,Dupé-Godet M

更新日期：1984-06-01 00:00:00

abstract：:Atretic follicles of the ovary of the Indian pied myna (Sturnus contra contra) were studied in birds collected each month throughout the year. Histological examination included histochemical techniques for 3β-hydroxy-steroid dehydrogenase (3β-HSDH) and for lipids. Atretic follicles were mainly of two types: nonburstin...

journal_title：Journal of morphology

authors： Gupta SK,Maiti BR

更新日期：1986-12-01 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：:The functional anatomy of the hindlimb of 12 species of viverrids was studied with relation to locomotion. The animals were allocated to primary locomotor categories on the basis of their anatomy and locomotion. The climbing, arboreal walking category (Nandinia binotata) is characterized by a small sacroiliac articula...

journal_title：Journal of morphology

authors： Taylor ME

更新日期：1976-02-01 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

authors： Ghiradella H

更新日期：1989-10-01 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：:The fine structure of the shell and underlying mantle in young juveniles of the articulate brachiopod Terebratalia transversa has been examined by electron microscopy. The first shell produced by the mantle consists of a nonhinged protegulum that lacks concentric growth lines. The protegulum is secreted within a day a...

journal_title：Journal of morphology

authors： Stricker SA,Reed CG

更新日期：1985-03-01 00:00:00

abstract：:A new morphological type of somatosensory organ is described. It is found in the glabrous skin of the dog nose (rhinarium or planum nasale) and situated in dermis papillae. The otherwise thick epidermis forms a thin window above the organ. There are only a few layers of keratinocytes in the window and the corneocytes ...

journal_title：Journal of morphology

authors： Elofsson R,Kröger RHH

更新日期：2020-03-01 00:00:00

abstract：:The cat hindlimb contains several long, biarticular strap muscles composed of parallel muscle fascicles that attach to short tendons. Three of these muscles--sartorius, tenuissimus, and semitendinosus--were studied by dissecting individual gold-stained fibers and determining the surface distribution of acetylcholinest...

journal_title：Journal of morphology

authors： Loeb GE,Pratt CA,Chanaud CM,Richmond FJ

更新日期：1987-01-01 00:00:00

abstract：:Septate junctions develop initially just basad from apical junctional complexes at the apical ends of regenerating gastrodermal cells. The first morphological indication of differentiation of the junction is the appearance of gentle undulations of the plasma membranes of apposing cells. Subsequently dense dots develop...

journal_title：Journal of morphology

authors： Hori I

更新日期：1987-06-01 00:00:00