Functional morphology of the female reproductive system of a crab with highly extensible seminal receptacles and extreme sperm storage capacity.

abstract：:This descriptive electron microscopic study of the blastogenetic medusa development of Podocoryne carnea focuses on the earliest stages of primordium formation, myogenesis, oogenesis and cnidogenesis. The events which take place at the cellular level prior to the formation of stage 1 (Frey, '68), which are characteriz...

journal_title：Journal of morphology

authors： Boelsterli U

更新日期：1977-11-01 00:00:00

abstract：:The fine structure of the mid-gut musculature of the desert locust, Schistocerca gregaria is described and compared with that of the visceral muscles of other species. The gross morphology and fine structure of the nervous system which supplies the mid-gut muscle fibres is described. ...

journal_title：Journal of morphology

authors： Anderson M,Cochrane DG

更新日期：1978-05-01 00:00:00

abstract：:The embryonic development of the viviparous scorpion, Heterometrus fulvipes, has been followed throughout the gestation period and the successive stages of the developing embryos have been examined. The morphological features of the embryos are also described and illustrated according to their approximate age. ...

journal_title：Journal of morphology

authors： Subburam V,Reddy TG

更新日期：1981-09-01 00:00:00

abstract：:The extracellular matrices (ECMs) surrounding the benthic embryos and larvae of the seastar Patiriella exigua and the planktonic embryos of Patiriella regularis were examined by transmission and scanning electron microscopy. Three ECMs surround unhatched embryos: An outer jelly coat, a fertilization envelope, and an i...

journal_title：Journal of morphology

authors： Cerra A,Byrne M

更新日期：1995-07-01 00:00:00

abstract：:The ultrastructure of a well studied insect chemosensory unit is presented in this report. Two separate lumina are present in this chemosensory unit, the trichogen and sensillar lumina. The fluid within the trichogen lumen exclusively bathes the dendritic terminals, and may be involved with the reception and/or modula...

journal_title：Journal of morphology

authors： Felt BT,Vande Berg JS

更新日期：1976-11-01 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：:Reconstruction of limb posture is a challenging task in assessing functional morphology and biomechanics of extinct tetrapods, mainly because of the wide range of motions possible at each limb joint and because of our poor knowledge of the relationship between posture and musculoskeletal structure, even in the extant ...

journal_title：Journal of morphology

authors： Fujiwara S

更新日期：2009-09-01 00:00:00

abstract：:The microvasculariaztion of the lateral line organs (LLOs) of the adult pipid frog, Xenopus laevis was studied by scanning electron microscopy of vascular corrosion casts (VCCs) and correlative light microscopy of paraplast embedded tissues sections. Scanning electron micrographs of VCCs revealed that each neuromast w...

journal_title：Journal of morphology

authors： Gerlach N,Minnich B,Lametschwandtner A

更新日期：2014-05-01 00:00:00

abstract：:Newly metamorphosed individuals of the Kenyan reed frog, Hyperolius viridiflavus ferniquei, are able completely to regenerate amputated digits, including the morphologically complex digital pad. The sequence of morphological events is very similar to that seen in the typical epimorphic regeneration of amphibian extrem...

journal_title：Journal of morphology

authors： Richards CM,Carlson BM,Rogers SL

更新日期：1975-08-01 00:00:00

abstract：:Scleractinian corals begin their biomineralization process shortly after larval settlement with the formation of calcium carbonate (CaCO(3)) structures at the interface between the larval tissues and the substrate. The newly settled larvae exert variable degrees of control over this skeleton formation, providing an op...

journal_title：Journal of morphology

authors： Gilis M,Meibom A,Alexander D,Grauby O,Stolarski J,Baronnet A

更新日期：2015-10-01 00:00:00

abstract：:The sharpness and thus information content of the retinal image in the eye depends on the optical quality of the lens and its accurate positioning in the eye. Multifocal lenses create well-focused color images and are present in the eyes of all vertebrate groups studied to date (mammals, reptiles including birds, amph...

journal_title：Journal of morphology

authors： Gustafsson OS,Ekström P,Kröger RH

更新日期：2010-08-01 00:00:00

abstract：:To our knowledge, this paper presents the first description of neuroendocrine complexes in invertebrates. Neuroendocrine complexes have been identified in the lamina propria of the snail gut by light microscopy using Giemsa-stained, deplasticized sections and by electron microscopy. Silver impregnations and immunocyto...

journal_title：Journal of morphology

authors： Alba Y,Villaro AC,Sesma P,Vázquez JJ

更新日期：1989-03-01 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：: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：:Stauromedusae have relatively few macromorphological characters, making both their taxonomy and identification difficult. For this reason, histological characters are also employed in the taxonomy of the group. This study presents a detailed description of the histomorphology of Haliclystus antarcticus Pfeffer, 1889 (...

journal_title：Journal of morphology

authors： Miranda LS,Collins AG,Marques AC

更新日期：2013-12-01 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：: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：:Andean frogs of the genus Telmatobius occur at high elevations, they have an aquatic mode of life and large tadpoles. There are more than 60 species that closely resemble one another and have low values of genetic divergence. However, the skeleton, particularly the cranium, is interspecifically variable with respect t...

journal_title：Journal of morphology

authors： Barrionuevo JS

更新日期：2018-09-01 00:00:00

abstract：:Motor units of the medial gastrocnemius (MG) and the single lateral gastrocnemius/soleus (LG/S) muscles of the opossum (Didelphis virginiana) were found to have uniformly slow contraction times relative to homologous muscles of the cat. Though a broad range of peak tetanic tensions was found among motor units from bot...

journal_title：Journal of morphology

authors： Peters SE,Mulkey R,Rasmussen SA,Goslow GE Jr

更新日期：1984-09-01 00:00:00

abstract：:Clasper gland morphology and development in Potamotrygon magdalenae and its relation with the acquisition of reproductive maturity is described in males of different developmental stages (embryos, neonates, juveniles, and reproductively active and resting adults). The glands are subcutaneous masses in the proximal bas...

journal_title：Journal of morphology

authors： Anaya-López P,Ramírez-Pinilla MP

更新日期：2017-03-01 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：:Among egg-brooding hylid frogs there is much interspecific variation in the degree of development of the young at hatching. In certain species of Gastrotheca the eggs hatch into free-living tadpoles, whereas in others (and in the genera Amphignathodon, Cryptobatrachus, Stefania and Hemiphractus) the eggs hatch directl...

journal_title：Journal of morphology

authors： Wassersug RJ,Duellman WE

更新日期：1984-10-01 00:00:00

abstract：:For better understanding of the links between limb morphology and the metabolic cost of locomotion, we have characterized the relationships between limb length and shape and other functionally important variables in the straightened forelimbs and hindlimbs of a sample of 12 domestic dogs (Canis familiaris). Intra-anim...

journal_title：Journal of morphology

authors： Myers MJ,Steudel K

更新日期：1997-11-01 00:00:00

abstract：:Remarkably preserved specimens of Cowralepis mclachlani Ritchie, 2005 (Proc Linn Soc NSW 126:215-259) (Phyllolepida, Placodermi) represent a unique ontogenetic sequence adding to our understanding of anatomy, function, and phylogeny among basal jawed vertebrates (gnathostomes). A systematic review demonstrates that th...

journal_title：Journal of morphology

authors： Carr RK,Johanson Z,Ritchie A

更新日期：2009-07-01 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：:Many cases of predator-induced morphological plasticity in daphnids are well studied examples of inducible defenses. However, little is known about the early development of these sometimes conspicuous traits. We compared for the first time in five different Daphnia species the embryonic development of predator-induced...

journal_title：Journal of morphology

authors： Laforsch C,Tollrian R

更新日期：2004-12-01 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 form and function of the hesperiid feeding apparatus was studied in detail. The butterflies in the family Hesperiidae are of particular interest because the longest proboscis ever recorded in Papilionoidea was found in the Neotropical genus Damas. We focused on the functional morphology by comparing proboscis morp...

journal_title：Journal of morphology

authors： Krenn HW,Bauder JA

更新日期：2018-03-01 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：:Previously we showed that type XII collagen (col XII) is highly upregulated in the regenerating newt (Notophthalmus viridescens) forelimb. Here, using immunohistochemistry and in situ hybridization, we studied the pattern of expression of col XII during early stages of adult newt tail regeneration. The results show th...

journal_title：Journal of morphology

authors： Wei Y,Tassava RA

更新日期：1996-11-01 00:00:00