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 groups. Their widespread occurrence in various tissues of other Drosophila species indicates that they can be considered as symbionts, but their actual functional significance (if any) is unknown.
journal_name
J Morpholjournal_title
Journal of morphologyauthors
Thomopoulos GN,Neophytou EP,Limberi-Thomopoulos Sdoi
10.1002/jmor.1052070104subject
Has Abstractpub_date
1991-01-01 00:00:00pages
17-21issue
1eissn
0362-2525issn
1097-4687journal_volume
207pub_type
杂志文章abstract::The sagittal otolith of Hyperoglyphe antarctica (Centrolophidae: Teleostei) has a prismatic structure in which the anti-sulcal growth axes of each prism consist of a series of nested cones each composed of a mineral layer followed by an organic matrix layer. Broken sections show the mineral layers to be composed of st...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1052230208
更新日期:1995-02-01 00:00:00
abstract::Bone is a dynamic tissue adapting to loading according to "Wolff's law of bone adaptation." During very early life, however, such a mechanism may not be adequate enough to adapt to the dramatic change in environmental challenges in precocial species. Their neonates are required to stand and walk within hours after bir...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.20548
更新日期:2016-07-01 00:00:00
abstract::The king-of-the-salmon, Trachipterus altivelis (Lampriformes), has an unusual set of oral jaws which allow it the ability to protrude the entire upper jaw, containing the premaxilla and the maxilla bones, to extreme distances. Here, we provide a short description of the cranial anatomy and mechanism of jaw protrusion ...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.21071
更新日期:2019-12-01 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
pub_type: 杂志文章
doi:10.1002/jmor.1051680309
更新日期:1981-06-01 00:00:00
abstract::Gross and histological examination of all extant families of turtles revealed that the buccopharyngeal mucosa is morphologically highly varied. The tongues of aquatic species have small lingual papillae or lack them entirely, while terrestrial species have tongues with numerous glandular papillae. The pharynx and the ...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051960105
更新日期:1988-04-01 00:00:00
abstract::We investigated growth-related and sex-related morphological changes in the skulls of 144 North Pacific common minke whales Balaenoptera acutorostrata. Measurement was conducted at 39 points on the skull and mandible to extract individual allometric equations relating the length and zygomatic width of the skull. The r...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.20288
更新日期:2014-10-01 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
pub_type: 杂志文章
doi:10.1002/jmor.10263
更新日期:2006-01-01 00:00:00
abstract::The cytoarchitecture of nuclei in the preoptic area, ventral thalamus, dorsal thalamus, epithalamus, hypothalamus, posterior tuberculum, synencephalon, and pretectum and the accessory optic nuclei was analyzed in a perciform teleost, the sea bass Dicentrarchus labrax, by using serial sections stained with cresyl-viole...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/1097-4687(200103)247:3<229::AID-JMOR1014>3
更新日期:2001-03-01 00:00:00
abstract::The oral dentition and type and number of taste buds (TB) on the lips and in the oropharyngeal cavity were compared by means of SEM in 11 species of cardinal fishes (Apogonidae) belonging to five genera. The occurrence of a dense cover of skin papillae on the lips of some species (e.g., Apogon frenatus), as well as di...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.10186
更新日期:2004-03-01 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
pub_type: 杂志文章
doi:10.1002/jmor.1051780305
更新日期:1983-12-01 00:00:00
abstract::Despite the embryological and anatomical disparities present among lophotrochozoan phyla, there are morphological similarities in the cellular arrangements of ciliated cells used for propulsion among the nonfeeding larval forms of kamptozoans, nemerteans, annelids, mollusks, and bryozoans. Evaluating whether these sim...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.10592
更新日期:2008-03-01 00:00:00
abstract::The objectives of this research were to investigate the morphology of the thoracic skeleton and muscles of the mosquito, Culiseta inornata (Williston). The results are presented in 25 text figures and descriptions of each skeletal part and muscle. Undescribed exoskeletal structures are the postmediotergite, intersegme...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051530308
更新日期:1977-09-01 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
pub_type: 杂志文章
doi:10.1002/jmor.10402
更新日期:2006-03-01 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
pub_type: 杂志文章
doi:10.1002/jmor.1052020106
更新日期:1989-10-01 00:00:00
abstract::The brine shrimp, Artemia (Crustacea, Anostraca), is a zooplankton that is commonly used in both basic and applied research. Unfortunately, Artemia embryos are often cultured under conditions that alter early development, and reports based on these cultures oversimplify or fail to describe morphological phenotypes. Th...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.20344
更新日期:2015-03-01 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
pub_type: 杂志文章
doi:10.1002/jmor.1052140311
更新日期:1992-12-01 00:00:00
abstract::We studied early neurulation events in vitro by transplanting quail Hensen's node, central prenodal regions (before the nodus as such develops), or upper layer parts of it on the not yet definitively committed upper layer of chicken anti-sickle regions (of unincubated blastoderms), eventually associated with central b...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.10436
更新日期:2006-07-01 00:00:00
abstract::Caudal courtship glands (CCGs) are sexually dimorphic glands described in the skin of the dorsal tail base of some male salamanders in the genera Desmognathus, Eurycea, and Plethodon in the family Plethodontidae. These glands are believed to deliver pheromones to females during courtship, when the female rests her chi...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.20342
更新日期:2015-03-01 00:00:00
abstract::The mode of sexual reproduction and embryogenesis was compared in 3 species of Botrylloides: B. simodensis, B. lenis, and B. violaceus. In all species, a testis and an egg (occasionally 2 eggs), the former being anterior to the latter, mature in the mantle on either side of a zooid. The egg is surrounded by 2 follicul...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051930305
更新日期:1987-09-01 00:00:00
abstract::Sperm performance is likely to be an important determinant of male reproductive success, especially when females copulate with multiple males. Understanding sperm performance is therefore crucial to fully understand the evolution of male reproductive strategies. In this study, we examined the repeatability of sperm mo...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.20346
更新日期:2015-04-01 00:00:00
abstract::Studies on birds have led to the hypothesis that increased intestinal absorption between enterocytes (paracellular) evolved as a compensation for smaller intestinal size in fliers, which was perhaps selected to minimize the mass of digesta carried. This hypothesis predicts that bats will also exhibit relatively reduce...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.20324
更新日期:2015-01-01 00:00:00
abstract::Sea urchin adoral tube feet are highly specialized organs that have evolved to provide efficient attachment to the substratum. They consist of a disk and a stem that together form a functional unit. Tube foot disk tenacity (adhesive force per unit area) and stem mechanical properties (e.g., stiffness) vary between spe...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.11004
更新日期:2012-01-01 00:00:00
abstract::Fine structural changes in mitochondrial morphology pertaining to size, number and growth were examined in flight muscles of normal and experimentally dewinged male Drosophila melanogaster ranging up to 26 days of age. In the normal winged flies, the number of mitochondria decreases during the first week of adult lif...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051450307
更新日期:1975-03-01 00:00:00
abstract::A chromatolysis study, 14 to 21 days following denervation, showed the spinal cord representation of the nerve to the posterior latissimus dorsi muscle to be in the ventrolateral cell column between cervical ganglia 14 and 15. to characterize cevical neruos nt undergoing chromatolysis, histochemical stuies were done t...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051470204
更新日期:1975-10-01 00:00:00
abstract::Cover illustration. Mayetiola destructor is a major pest of wheat in Europe, North Africa and North America. In this issue of the Journal of Morphology, Schneeberg et al. (pp. 1299-1311) investigate the adult head structures of the cecidomyiid fly and compared their findings with evolutionarily less successful familie...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.20220
更新日期:2013-11-01 00:00:00
abstract::A comparative study of four genera of arvicolid rodents (Clethrionomys, Eothenomys, Alticola, and Synaptomys) presents the first complete description of limb myology for any member of this recently evolved, highly successful family. The study also identifies four forelimb and four hind-limb muscles that exhibit charac...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051870305
更新日期:1986-03-01 00:00:00
abstract::The origins and evolution of the three major clades of modern amphibians are still a source of controversy, and no general consensus exists as to their relationship to the various known Paleozoic taxa. This may indicate that additional character complexes should be studied to resolve their phylogenetic relationship. T...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.10769
更新日期:2009-12-01 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
pub_type: 杂志文章
doi:10.1002/jmor.1080
更新日期:2002-02-01 00:00:00
abstract::Intercellular bridge development was compared in Ceropia by transmission electron microscopy in the germ cells of males and females. Bridge formation begins in the fourth instar, and the spindle remnants in newly formed bridges are replaced at this time by an amorphous material known as the fusome. In the four- and ei...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051660104
更新日期:1980-10-01 00:00:00
abstract::The aim of this work was to study the postnatal ontogenetic development of Pontoporia blainvillei skull, identifying major changes on shape, and relating them to relevant factors in the life history of the species. We analyzed a complete ontogenetic series (73♂, 83♀) with three-dimensional geometric morphometric techn...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.20309
更新日期:2014-12-01 00:00:00