Light and electron microscopic study of the hindgut of the ant (Formica nigricans, hymenoptera): I. Structure of the ileum.

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：:A statistical and functional relationship between neural canal anatomy and locomotor mode is demonstrated in living marine mammals of the Order Carnivora. This relationship is interpreted to be the result of differential innervation and territory of musculature involved in generating the six locomotor patterns analyze...

journal_title：Journal of morphology

authors： Giffin EB

更新日期：1992-12-01 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：:The olfactory epithelium and the vomeronasal organ of the Japanese striped snake were examined by lectin histochemistry. Of the 21 lectins used in the study, all lectins except succinylated-wheat germ agglutinin (s-WGA) showed similar binding patterns in the vomeronasal receptor cells and the olfactory receptor cells ...

journal_title：Journal of morphology

authors： Kondoh D,Yamamoto Y,Nakamuta N,Taniguchi K,Taniguchi K

更新日期：2010-10-01 00:00:00

abstract：:Changes in size frequency distribution of extrastromal follicles, atretric follicles (AF), and the number of oogonia, oocytes, and primordial follicles in the ovaries are studied in Calotes versicolor during its annual reproductive cycle. Extrastromal follicles were graded into stages I to VI based on their diemeter. ...

journal_title：Journal of morphology

authors： Shanbhag BA,Prasad BSK

更新日期：1993-04-01 00:00:00

abstract：:Profiles with all orientations have been used to visualize the 3D structure of ivory from tusks of elephant, mammoth, walrus, hippopotamus, pig (bush, boar, and warthog), sperm whale, killer whale, and narwhal. Polished, forming, fractured, aged, and stained surfaces were prepared for microscopy using epi-illumination...

journal_title：Journal of morphology

authors： Locke M

更新日期：2008-04-01 00:00:00

abstract：:The nurse shark, Ginglymostoma cirratum, is an obligate suction feeder that preys on benthic invertebrates and fish. Its cranial morphology exhibits a suite of structural and functional modifications that facilitate this mode of prey capture. During suction-feeding, subambient pressure is generated by the ventral expa...

journal_title：Journal of morphology

authors： Motta PJ,Hueter RE,Tricas TC,Summers AP,Huber DR,Lowry D,Mara KR,Matott MP,Whitenack LB,Wintzer AP

更新日期：2008-09-01 00:00:00

abstract：:Tooth development and replacement in fetal and adult viviparous caecilians (Amphibia: Gymnophiona) are described and analyzed according to current theories of tooth succession. The fetal dentition differs from that of the adult in morphology, position, and function. Teeth are used by fetuses to scrape the oviducal epi...

journal_title：Journal of morphology

authors： Wake MH

更新日期：1976-01-01 00:00:00

abstract：:The tubular accessory gland consists of a simple secretory epithelium surrounded by a muscular coat. Over the pupal instar, the gland increases ten-fold in volume and 15-fold in length. Pupal development is divisible into a phase of mitosis and one of cell growth. During the mitotic phase, cytoplasmic membranes are sp...

journal_title：Journal of morphology

authors： Happ GM,Happ CM

更新日期：1982-04-01 00:00:00

abstract：:A description of the external morphogenesis of male and female embryos of X. ferrugineus, derived from in vivo observation, is presented here. The embryogenesis of this beetle is typical of the Coleoptera, and is also similar in most respects to the generalized insect plan. Observed unusual aspects of X. ferrugineus e...

journal_title：Journal of morphology

authors： Beeman SL,Norris DM

更新日期：1977-05-01 00:00:00

abstract：:Spermatogenesis discontinues during both adult reproductive diapause and quiescence in the flightless males of Omorgus freyi. During both types of dormancy, spermatogenesis discontinuity is a dynamic process involving an uninterrupted supply of primary spermatocytes that undergoes partial development and lyses before ...

journal_title：Journal of morphology

authors： Friedländer M,Scholtz CH

更新日期：1993-12-01 00:00:00

abstract：:Although the overall pattern and timing of gonadal sex differentiation have been established in a considerable number of teleosts, the ultrastructure of early stages of gonadal development is not well documented. In this study, gonads from larval and juvenile stages of laboratory-reared Cichlasoma dimerus were examine...

journal_title：Journal of morphology

authors： Meijide FJ,Lo Nostro FL,Guerrero GA

更新日期：2005-05-01 00:00:00

abstract：:The phylogenetic position of the Ectoprocta within the Lophotrochozoa is discussed controversially. For gaining more insight into ectoproct relationships and comparing it with other potentially related phyla, we analysed the myoanatomy and serotonergic nervous system of adult representatives of the Phylactolaemata (Pl...

journal_title：Journal of morphology

authors： Schwaha T,Wanninger A

更新日期：2012-01-01 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：:Descriptions are provided of the histology and ultrastructure of the male internal reproductive tracts from three species of Camponotus, representing three subgenera. This study is the first to provide ultrastructural information on the testes (including spermatogenesis and spermiogenesis), seminal vesicles, and acces...

journal_title：Journal of morphology

authors： Wheeler DE,Krutzsch PH

更新日期：1992-03-01 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：:Detailed descriptions of mammalian sperm morphology across a range of closely related taxa are rare. Most contributions have been generalized descriptions of a few distantly related mammalian species. These studies have emphasized a generalized ungulate sperm morphology, but have not underscored several important morp...

journal_title：Journal of morphology

authors： Downing Meisner A,Klaus AV,O'Leary MA

更新日期：2005-02-01 00:00:00

abstract：:The form of amniote claws has been extensively investigated, often with inferences about ecological association being drawn from studies of their geometry. Various methods have been used to quantify differences in the geometry of claws, but rarely have the underlying assumptions of such methods been addressed. Here, w...

journal_title：Journal of morphology

authors： Tinius A,Patrick Russell A

更新日期：2017-02-01 00:00:00

abstract：:The segmental anatomy of Harmothoë imbricata deviates from the plan of a typical errant polychaete only slightly. The body is partitioned into 37 nonmetameric segments and is covered by 15 pairs of elytra. The segmental musculature consists of paired dorsal and ventral longitudinal muscles, pairs of dorso-ventral musc...

journal_title：Journal of morphology

authors： Lawry JV Jr

更新日期：1971-11-01 00:00:00

abstract：:A survey of skeletal muscles throughout craniates shows basic kinds of myosin filament arrangement, simple-lattice and superlattice, within the A-band of each sarcomere. Distribution of simple- and superlattice arrangements across a phylogeny of craniates suggests that the superlattice arrangement is primitive and tha...

journal_title：Journal of morphology

authors： Luther PK,Squire JM,Forey PL

更新日期：1996-09-01 00:00:00

abstract：:To date, the phylum Cycliophora comprises only one described extant species of acoelomate marine invertebrates, Symbion pandora. Adult specimens live commensally on the mouthparts of the Norwegian lobster, Nephrops norvegicus. Its complicated life cycle includes an asexually produced Pandora larva and a sexually produ...

journal_title：Journal of morphology

authors： Wanninger A

更新日期：2005-08-01 00:00:00

abstract：:The hypotheses of relationships within Lari (gulls) are highly unstable, and depend on whether morphological or molecular data are examined. Developmental sequence data are thought to contain phylogenetic information, but have never been applied to the problem of avian systematics. In this article, we describe the oss...

journal_title：Journal of morphology

authors： Maxwell EE,Harrison LB

更新日期：2008-09-01 00:00:00

abstract：:In this study, we compare and contrast armoring strategies during early ontogeny among three related species of marine turtles: the hawksbill, a species that diverged about 29 mya from the loggerhead and Kemp's ridley, which diverged from one another about 16 mya. Our purpose was to determine whether there was a corre...

journal_title：Journal of morphology

authors： Salmon M,Coppenrath C,Higgins B

更新日期：2018-09-01 00:00:00

abstract：:Ultrastructural observations and glyoxilic acid-induced fluorescence of catecholamines indicate that tracts of axons lie at the base of the ciliary bands and run throughout their length in bipinnaria and brachiolaria larvae of Pisaster ochraceus. Two types of nerve cells occur at regular intervals within the ciliary b...

journal_title：Journal of morphology

authors： Burke RD

更新日期：1983-10-01 00:00:00

abstract：:Scanning electron microscopy reveals that the flat tongue of Platemys pallidipectoris has shallow grooves and no lingual papillae. The surface of the tongue is covered with dome-shaped bulges, each corresponding to a single cell. Short microvilli are distributed over the cell surface. Light microscopy shows a stratifi...

journal_title：Journal of morphology

authors： Beisser CJ,Weisgram J,Splechtna H

更新日期：1995-12-01 00:00:00

abstract：:The cytoarchitecture and neuronal morphology of the torus semicircularis in the red-eared turtle, Chrysemys scripta elegans, were examined in Nissl-stained and Golgi-impregnated material. The torus semicircularis begins in the caudodorsal mesencephalon and extends rostrally and laterally to end ventrally to the tectal...

journal_title：Journal of morphology

authors： Browner RH,Kennedy MC,Facelle T

更新日期：1981-08-01 00:00:00

abstract：:The outer retinae of adults of 13 atherinomorph species, representing nine different families, were examined by both light and electron microscopy. The retinae were investigated with respect to photoreceptor types, cone densities, and cone patterns. All data were composed to eye maps. This procedure allows an interspe...

journal_title：Journal of morphology

authors： Reckel F,Melzer RR

更新日期：2003-09-01 00:00:00

abstract：:Freshwater sponges of the family Spongillidae reproduce sexually through formation of a parenchymula larva. The cytochemical characteristics of parenchymula larval metamorphosis - beginning with the blastula and terminating with the motile escape stage - for the spongillid Eunapius fragilis (Leidy) have been defined u...

journal_title：Journal of morphology

authors： Harrison FW,Cowden RR

更新日期：1975-02-01 00:00:00

abstract：:Morphological features of the goldfish caudal neurosecretory system were investigated by means of immunohistochemical localization of urotensins I and II (UI and UII) and electron microscopic examination of the caudal neurosecretory neurons, the urophysis, and the synaptic neuropil. The aim of the work is to provide a...

journal_title：Journal of morphology

authors： Cioni C,De Vito L,Greco A,Pepe A

更新日期：1998-01-01 00:00:00

abstract：:Barnacle cypris larvae show high morphological variation in the organs used in search of and attaching to a substratum. This variation may represent adaptation to the habitat of the species. Here, we studied SEM level morphologies of cypris antennular sensory and attachment organs in a deep-sea vent endemic species (N...

journal_title：Journal of morphology

authors： Yorisue T,Chan BK,Kado R,Watanabe H,Inoue K,Kojima S,Høeg JT

更新日期：2016-05-01 00:00:00