Gross and fine structure of the antennal circulatory organ in cockroaches (Blattodea, Insecta).

abstract：:The lizard tail is well known for its ability to autotomize and regenerate. Physical contact of the tail by a predator may induce autotomy at the location at which the tail is grasped, and upon detachment the tail may undergo violent, rapid, and unpredictable movements that appear to be, to some degree, regulated by c...

journal_title：Journal of morphology

authors： Russell AP,Lai EK,Lawrence Powell G,Higham TE

更新日期：2014-09-01 00:00:00

abstract：:The orbital Harderian gland of the common tree shrew (Tupaia glis) was investigated at the macroscopic and microscopic levels. In the glands of both sexes only one acinar cell type was found. The cell is characterized by the presence of numerous lipid vacuoles of variable size and by a small number of PAS-positive, el...

journal_title：Journal of morphology

authors： Pradidarcheep W,Asavapongpatana S,Mingsakul T,Poonkhum R,Nilbu-nga S,Somana R

更新日期：2003-03-01 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：:Spermiogenesis in the South American leptodactylid frog Odontophrynus cultripes was analyzed ultrastructurally. The spermatids undergo morphological modification while still enclosed in microtubule-rich processes of Sertoli cells. Electron-dense plates resembling junctional structures appear in regions at which the sp...

journal_title：Journal of morphology

authors： Báo SN,Dalton GC,de Oliveira SF

更新日期：1991-03-01 00:00:00

abstract：:The surface of a mature, pelagic C-O sole egg is composed of polygonal chambers having four to eight sides, most of which are hexagonally shaped. This honeycomb pattern initially appears on primary oocytes as a thin layer of compact, electron-dense material. Discrete thickenings begin to develop on the envelope of per...

journal_title：Journal of morphology

authors： Stehr CM,Hawkes JW

更新日期：1983-12-01 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：:Neurosecretory (Nsy) cells within the cerebral ganglion of Lumbricus terrestris were classified ultrastructurally. The Nsy cells within the subesophageal ganglion, nerve cord ganglion, and the peripheral nervous system were also examined. A comparative survey of Nsy cells of four other species of oligochaetes, Eisenia...

journal_title：Journal of morphology

authors： Al-Yousuf S

更新日期：1988-07-01 00:00:00

abstract：:Rickettsiae-like structures were found in the salivary gland cells of Drosophila auraria during different larval and prepupal developmental stages, from the early 3rd instar up to 14 hr after spiracle inversion. These microorganisms are surrounded by a membrane, are constantly intracellular, and occur singly or in gro...

journal_title：Journal of morphology

authors： Thomopoulos GN,Neophytou EP,Limberi-Thomopoulos S

更新日期：1991-01-01 00:00:00

abstract：:The identity and taxonomic distribution of paranasal sinuses among living platyrrhines has remained a contentious issue (e.g., Cave [1967] Am J Phys Anthropol 26:277-288 vs. Hershkovitz [1977] Chicago: University of Chicago Press) largely because the ontogenetic data required for their detection and identification (e....

journal_title：Journal of morphology

authors： Rossie JB

更新日期：2006-01-01 00:00:00

abstract：:It has been hypothesized that fluctuating asymmetry (FA) may provide an indication of the functional importance of structures within an organism, with structures that more strongly impact fitness being more symmetric. Based on this idea, we predicted that for tetrapods in which the forelimbs and hindlimbs play an uneq...

journal_title：Journal of morphology

authors： Didde RD,Rivera G

更新日期：2019-04-01 00:00:00

abstract：:Vibrissae or follicle-sinus complexes (F-SCs) are highly developed mammalian sensory structures. These blood-filled sinuses are richly innervated and possess novel mechanoreceptors. Although much is known regarding the function of F-SCs in terrestrial mammals, much less is known regarding marine carnivores such as pin...

journal_title：Journal of morphology

authors： Sprowls CD,Marshall CD

更新日期：2019-11-01 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：:We described the topography and morphometry of the testicular artery, pampiniform plexus veins, and indirect connections between them in the spermatic cord of the bull. Sixty microcorrosive casts of bovine spermatic cords were analyzed macroscopically, by stereomicroscopy, and by scanning electron microscopy. The aver...

journal_title：Journal of morphology

authors： Polguj M,Jȩdrzejewski KS,Topol M

更新日期：2011-04-01 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：:Many studies in the genus Poecilia have focused on reproductive and genetic characteristics of Poecilia formosa, the Amazon molly, and its sympatric species P. latipinna and P. mexicana. The research literature of Poecilia dentition has been limited to general tooth morphology. Essentially absent are comparative analy...

journal_title：Journal of morphology

authors： Lewis SR,Rasch EM,Hossler FE,Kalbfleisch JH,Monaco PJ

更新日期：1999-03-01 00:00:00

abstract：:Larval salivary gland cells of seven Drosophila species from the melanogaster group were studied during the early third-instar period. Similar cytoplasmic organization was seen in both the distal and proximal parts of the gland. The cytoplasm contained a large number of free ribosomes, but only a few rough endoplasmic...

journal_title：Journal of morphology

authors： Thomopoulos GN

更新日期：1988-10-01 00:00:00

abstract：:A hitherto unknown sensillum type, the "intracuticular sensillum" was identified on the dactyls of the walking legs of the shore crab, Carcinus maenas. Each sensillum is innervated by two sensory cells with dendrites of "scolopidial" (type I) organization. The ciliary segment of the dendrite is 5-6 μm long and contain...

journal_title：Journal of morphology

authors： Schmidt M

更新日期：1990-06-01 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：:Mature spermatozoa from spermathecae of founding queens were obtained from 5 species of ants, representing the major subfamilies Myrmicinae (Acromyrmex versicolor, Crematogaster sp.) and Dolichoderinae (Tapinoma sessile, Conomyrma insana, Conomyrma wheeleri). The ultrastructure of ant spermatozoa has many features in ...

journal_title：Journal of morphology

authors： Wheeler DE,Crichton EG,Krutzsch PH

更新日期：1990-12-01 00:00:00

abstract：:Cytoplasmic microtubules can be divided into two subpopulations: 1) those adjacent to the nucleus (perinuclear), and 2) those distributed between the myofilament bundles (nonperinuclear). Previous observations (Cartwright and Goldstein, '83) indicate total cytoplasmic microtubule numeric density increases to a maximum...

journal_title：Journal of morphology

authors： Park RS,Légier MF,Cartwright J Jr,Goldstein MA

更新日期：1984-01-01 00:00:00

abstract：:The gonads from three hermaphrodite species of different invertebrate phyla were studied at the ultastructure level. In the flatworm Dugesia biblica, male germ cells in different stages of development lay in the lumen of testicular follicles surrounded by overlapping parietal cells. The intercellular space formed by c...

journal_title：Journal of morphology

authors： O'Donovan P,Abraham M

更新日期：1987-06-01 00:00:00

abstract：:During suction feeding teleost fish have to start mouth opening prior to other expansion movements of the head such as operculo-suspensorium abduction. The distribution of the input force over the various expansion movements is determined by the position of the hyoid in the expansion apparatus. Based on a three-dimens...

journal_title：Journal of morphology

authors： De Visser J,Barel CDN

更新日期：1996-04-01 00:00:00

abstract：:The structure of the nephron in the ranid frog, Rana cancrivora, was studied by light and electron microscopy. This frog is the only amphibian species to live in mangrove swamps of very high salinity. The nephron consists of the following parts: renal corpuscle, ciliated neck segment, proximal tubule, ciliated interme...

journal_title：Journal of morphology

authors： Uchiyama M,Murakami T,Yoshizawa H,Wakasugi C

更新日期：1990-05-01 00:00:00

abstract：:The development of two of the cranial lateral line canals is described in the cichlid, Archocentrus nigrofasciatus. Four stages of canal morphogenesis are defined based on histological analysis of the supraorbital and mandibular canals. "Canal enclosure" and "canal ossification" are defined as two discrete stages in l...

journal_title：Journal of morphology

authors： Tarby ML,Webb JF

更新日期：2003-01-01 00:00:00

abstract：:Basket stars, that is, Ophiuroidea in Echinodermata, exhibit distinctive morphological characteristics with their complicatedly branched arms that can regenerate immediately after mutilation. Although, in brittle stars, that is, ophiuroids with nonbranched arms, the arm regeneration process following accidental trauma...

journal_title：Journal of morphology

authors： Okanishi M,Kohtsuka H,Miura T

更新日期：2021-02-01 00:00:00

abstract：:The SEM was used to study the development of respiratory structures in successive stages in relation to the overall changes occurring in the scorpions. Book lung development is a slow process, starting with spiracles and a sac-like atrium in the early embryo and continuing lamellar formation to 150 or more in the adul...

journal_title：Journal of morphology

authors： Farley RD

更新日期：2008-09-01 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：:A single pair of protonephridia is the typical larval excretory organ of molluscs. Their presence in postlarval developmental stages was discovered only recently. We found that the protonephridia of the polyplacophoran mollusc, Lepidochitona corrugata, achieve their most elaborate differentiation and become largest du...

journal_title：Journal of morphology

authors： Baeumler N,Haszprunar G,Ruthensteiner B

更新日期：2011-08-01 00:00:00

abstract：:External features of the egg, developing embryo, and first instar nymph of Kamimuria tibialis are described. The embryonic development from the germ disc to the full-grown embryo is divided into 12 stages. The saclike embryonic rudiment is formed by the bending and folding of the germ disc. The embryo first elongates ...

journal_title：Journal of morphology

authors： Kishimoto T,Ando H

更新日期：1985-03-01 00:00:00

abstract：:The structure, attachment and subsequent metamorphosis of larvae of the marine bryozoan Bugula neritina were studied by light and electron microscopy. Two points of larval anatomy are of special significance to proper interpretation of the metamorphosis: 1 Two cytologically similar blastemal tissues, each laden with f...

journal_title：Journal of morphology

authors： Woollacott RM,Zimmer RL

更新日期：1971-07-01 00:00:00