Morphology and ultrastructure of the organ of Bellonci in the marine amphipod Gammarus setosus.

abstract：:A morphological comparison of the spermatozoa of the octopods Bathypolypus bairdii and B. sponsalis has been carried out by electron microscopy. Although the mature spermatozoon of B. bairdii is longer and thinner than that of B. sponsalis, its general ultrastructure is similar except for some minor differences. Their...

journal_title：Journal of morphology

authors： Roura A,Guerra A,González AF,Pascual S

更新日期：2010-02-01 00:00:00

abstract：:Abyssocottus korotneffi and Cottinella boulengeri are the deepest-living bottom species among freshwater teleosts. Both species have gill arches with nodulous gill-rakers equipped with sharp denticles. The gill-slit behind the fourth arch is reduced considerably and the hemibranch corresponding to this slit is absent,...

journal_title：Journal of morphology

authors： Jakubowski M

更新日期：1997-08-01 00:00:00

abstract：:The spermatozoal ultrastructure in three solenocerid shrimps (Solenocera membranacea, S. africana, and Pleoticus muelleri) from different Atlantic locations was examined with the aim of increasing understanding of the phylogenetic relationships in the Dendrobranchiata. A considerable structural similarity between the ...

journal_title：Journal of morphology

authors： Medina A,Scelzo MA,Tudge CC

更新日期：2006-03-01 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：: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：:The laterophysic connection (LC) is an association between bilaterally paired, anterior swim bladder extensions (horns) and medial openings in the supracleithral lateral line canals that diagnoses butterflyfishes in the genus Chaetodon. It has been hypothesized that the LC makes the lateral line system sensitive to so...

journal_title：Journal of morphology

authors： Webb JF,Smith WL,Ketten DR

更新日期：2006-11-01 00:00:00

abstract：:Two types of sperm are produced in the silkworm, Bombyx mori. Nucleate eupyrene sperm is an ordinary sperm that contributes to fertilization, while anucleate apyrene sperm is considered to play important roles in assisting eupyrene sperm. At the very late stage of spermatogenesis, a phenomenon called "peristaltic sque...

journal_title：Journal of morphology

authors： Sahara K,Kawamura N

更新日期：2004-01-01 00:00:00

abstract：:During epidermal differentiation in mammals, keratins and keratin-associated matrix proteins rich in histidine are synthesized to produce a corneous layer. Little is known about interkeratin proteins in nonmammalian vertebrates, especially in reptiles. Using ultrastructural autoradiography after injection of tritiated...

journal_title：Journal of morphology

authors： Alibardi L

更新日期：2004-02-01 00:00:00

abstract：:The lungs of the New Caldeonian gecko Rhacodactylus leachianus were examined by means of gross dissection and light and electron microscopy. This tropical species, which is the largest living gecko, possesses two simple, single-chambered lungs. Right and left lungs are of similar size and shape. The lung volume (27.2 ...

journal_title：Journal of morphology

authors： Perry SF,Bauer AM,Russell AP,Alston JT,Maloney JE

更新日期：1989-01-01 00:00:00

abstract：:The role of dying cells in the optic stalk in relation to retinal fiber migration was investigated in the chick embryo. Cell death was analysed at various stages of development by counting pycnotic nuclei and also by the Gomori acid phosphatase reaction, while nerve fibers were visualised by the Bodian method. A wave ...

journal_title：Journal of morphology

authors： Ulshafer RJ,Clavert A

更新日期：1979-10-01 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：: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 recent discovery of a plethodontid salamander, Karsenia koreana, in Korea challenged our understanding of the biogeographic history of the family Plethodontidae, by far the largest family of salamanders, which otherwise is distributed in the New World with a few European species. Molecular studies suggest that Kar...

journal_title：Journal of morphology

authors： Buckley D,Wake MH,Wake DB

更新日期：2010-05-01 00:00:00

abstract：:Confocal imaging of Fluo-4, Propidium iodide, and di-8-Anepps loaded ureter were used to study the morphology of terminal arterioles with an inner diameter <50 μm in intact rat ureter. Optical sectioning showed that the muscle coat of the terminal arterioles consisted of a monolayer of highly curved smooth muscle cell...

journal_title：Journal of morphology

authors： Mumtaz S

更新日期：2013-06-01 00:00:00

abstract：:This investigation describes the morphogenesis of the type I pneumocyte from the neonatal stage to the age of 3 months. Cells lining subpleural air spaces were photographed from electron microscopic serial sections and a three-dimensional representation of each cell was obtained by transferring the contours of the cel...

journal_title：Journal of morphology

authors： Mercurio AR,Rhodin JA

更新日期：1984-11-01 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：:Amphisabenia is a group of squamates adapted for a fossorial lifestyle. The skull is the animal's the main digging tool, and can present one of four principal shapes. The shovel-headed shape is considered to be the most specialized for digging. The South American genus Leposternon presents a shovel-headed morphotype, ...

journal_title：Journal of morphology

authors： Hohl LSL,Barros-Filho JD,Rocha-Barbosa O

更新日期：2018-11-01 00:00:00

abstract：:We have studied the gill epithelium of Oreochromis niloticus using transmission electron microscopy with the particular interested relationship between cell morphology and osmotic, immunoregulatory, or other non-regulatory functions of the gill. Pavement cells covered the filament epithelium and lamellae of gills, wit...

journal_title：Journal of morphology

authors： Monteiro SM,Oliveira E,Fontaínhas-Fernandes A,Sousa M

更新日期：2010-05-01 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：:We studied the functional morphology of the female reproductive system of the purple stone crab Danielethus crenulatus. The most remarkable feature is the relative storage capacity and extensibility of the seminal receptacles. These receptacles are a pair of simple sacs that lack internal structures dividing the inter...

journal_title：Journal of morphology

authors： Farias NE,Spivak ED,Luppi TA

更新日期：2017-07-01 00:00:00

abstract：:The vomeronasal system consists of a peripheral organ and the connected central neuronal networks. The central connections are sexually dimorphic in rodents, and in some species, parameters of the vomeronasal organ (VNO) vary with sex, hormonal exposure, body size and seasonality. The VNO of the dasyurid marsupial mou...

journal_title：Journal of morphology

authors： Aland RC,Gosden E,Bradley AJ

更新日期：2016-11-01 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：: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

authors： Held LI Jr,Pham TT

更新日期：1983-11-01 00:00:00

abstract：:Pheromone systems from seven species of noctuid are examined. Much of the structure of scales from the wings and/or the abdomen is interpreted as a modification for secretion or release of a pheromone. Scales with an extremely complex surface provide a large evaporation surface, while those connected to secretory cell...

journal_title：Journal of morphology

authors： Clearwater JR

更新日期：1975-05-01 00:00:00

abstract：:The differences in angulation and length observed for the fibers of anatomical muscles may reflect two distinct mechanical requirements: arrangement for pinnation, reflecting an increase in physiological cross-section and arrangement for equivalent placement of sarcomeres, possibly associated with coordination. The ob...

journal_title：Journal of morphology

authors： Gans C,de Vree F

更新日期：1987-04-01 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：: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：: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 illustrate vascular modification accompanying transition from aquatic to amphibious life in gobies, we investigated the respiratory vasculatures of the gills and the bucco-opercular cavities in one of the most terrestrially-adapted mudskippers, Periophthalmodon schlosseri, using the corrosion casting technique. The...

journal_title：Journal of morphology

authors： Gonzales TT,Katoh M,Ghaffar MA,Ishimatsu A

更新日期：2011-05-01 00:00:00

abstract：:The cellular populations present in dorsomedial cortex in the snakes Constrictor constrictor, Natrix sipendon and Thamnophis sirtalis are described at the light microscopic level using Nissl and Golgi preparations as well as at the ultrastructural level. This area plays a central role in cortical organization in snake...

journal_title：Journal of morphology

authors： Ulinski PS

更新日期：1979-08-01 00:00:00