Abstract:
:The Antarctic snailfish Paraliparis devriesi (Liparididae) occupies an epibenthic habitat at a depth of 500-650 m in the subzero waters of McMurdo Sound, Antarctica. Although lacking a swim bladder, this species is neutrally buoyant through the combined effects of reduced skeletal ossification and expansion of a watery gelatinous subdermal extracellular matrix (SECM). The SECM serves as a low density buoyancy agent. It comprises a mean of 33.8% of the body weight, the largest known proportion of any adult fish. The SECM is loose connective tissue dominated by ground substance consisting of glycosaminoglycans, especially hyaluronic acid, and immobilized water. Although the SECM is 97% water, elevated levels of NaCl provide an osmotic strength greater than that of other body fluids. Only small amounts of antifreeze compounds have been identified in P. devriesi; therefore, freezing avoidance may result from the combined effects of antifreezes and the elevated osmolality of body fluids. The skin overlying the SECM is thin (85-200 μm) and loose, and unlike most other fishes, the epidermis is several times thicker than the dermis. The midepidermis, has a distinctive layer of vacuolated club cells of unknown function. Light and electron microscopy indicate that the skin is unspecialized for protection against entry of ice. © 1994 Wiley-Liss, Inc.
journal_name
J Morpholjournal_title
Journal of morphologyauthors
Eastman JT,Hikida RS,Devries ALdoi
10.1002/jmor.1052200108subject
Has Abstractpub_date
1994-04-01 00:00:00pages
85-101issue
1eissn
0362-2525issn
1097-4687journal_volume
220pub_type
杂志文章abstract::Two free-living marine euplotid ciliates, Pseudodiophrys nigricans and Diophrys japonica, collected from the coastal waters off Qingdao, northern China, were investigated using live observations and protargol impregnation methods. The cortical development of P. nigricans was observed during binary division. Although i...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.20097
更新日期:2013-04-01 00:00:00
abstract::The ovarian follicles of Ctenosaura pectinata exhibit a clear seasonal cycle in morphology. Early in development, each oocyte is surrounded by a granulosa composed of a single layer of cuboidal or squamous cells and thin thecal layers. As folliculogenesis progresses, the granulosa becomes multilayered and composed of ...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/(SICI)1097-4687(199610)230:1<99::AID-JMOR8
更新日期:1996-10-01 00:00:00
abstract::Hind foot drumming is a form of seismic signaling that plays a vital role in the communication of several Bathyergidae species. Hind foot drumming is initiated by the rapid movement of the whole hind limb by flexion and extension of the hip and knee. This study aimed to determine if morphological adaptations of the hi...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.21110
更新日期:2020-04-01 00:00:00
abstract::This research was designed to follow up the observation of Thornton and Kraemer ('51) that regressed, denervated limbs of Ambystoma larvae will not regenerate upon reinnervation if all digits on the limbs were not completely resorbed. The object of this experiment was to determine whether the presence of an apical str...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051540204
更新日期:1977-11-01 00:00:00
abstract::In the present investigation the right intracranial portion of the trochlear nerves and dorsal oblique muscle of the right ocular globe were removed from six adult dogs and analyzed by light and electron microscopy. Unmyelinated fibers were observed in the analyzed nerves. The number, diameter, area, and density of my...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.10271
更新日期:2004-12-01 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
pub_type: 杂志文章
doi:10.1002/jmor.10297
更新日期:2005-02-01 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
pub_type: 杂志文章
doi:10.1002/jmor.1051620105
更新日期:1979-10-01 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::Previous studies of squamate epidermal structure have focused on either histology and ultrastructure or oberhautchen surface texture as revealed by scanning electron microscopy (SEM). Using SEM data drawn from a variety of lizard taxa (primarily iguanids, but also agamids, chamaeleonids, and scincids), as well as amph...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051970108
更新日期:1988-07-01 00:00:00
abstract::Bats are distributed worldwide from tropical to temperate regions. Despite their wide geographical radiation and advances in studies using evolutionary approaches, aspects related to the reproduction of these animals remain poorly explored, especially those related to the male reproductive accessory glands (RAGs). Thu...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.20767
更新日期:2018-02-01 00:00:00
abstract::In this descriptive study, we characterize the diaphragm and lungs of the short-nosed echidna, Tachyglossus aculeatus, using a combination of gross anatomical, light-microscopic, electron microscopic, and morphometric techniques, including airway casting. The diaphragm is inclined from ventro-cranial to dorso-caudal a...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/(SICI)1097-4687(200003)243:3<247::AID-JMOR
更新日期:2000-03-01 00:00:00
abstract::Over the past few decades, geometric morphometric methods have become increasingly popular and powerful tools to describe morphological data while over the same period artificial neural networks have had a similar rise in the classification of specimens to preconceived groups. However, there has been little research i...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.20626
更新日期:2017-01-01 00:00:00
abstract::The fine structure of midgut cells in two species of Cladocera (Crustacea: Branchiopoda) has unique features when it is compared to that in the midguts of other arthropods. Features which suggest that food is absorbed in digested form are: the presence of the peritrophic membrane, the glycocalyx, the almost complete a...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051500306
更新日期:1976-11-01 00:00:00
abstract::The postembryonic development of the turtle carapace was studied in the aquatic Еmys orbicularis and the terrestrial Тestudo graeca. Differences in the structure of the bony shell in aquatic and terrestrial turtles were shown to be associated with varying degrees of development of epidermal derivatives, namely, the th...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.21050
更新日期:2019-10-01 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::This work summarizes the observations on 30 species of microdriles belonging to the families Naididae (Rhyacodrilinae, Pristininae, Naidinae, Phallodrilinae, and Tubificinae), Phreodrilidae, Lumbriculidae, and Enchytraeidae using scanning electron microscopy. The lumbricid Eiseniella tetraedra, a megadrile species com...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.10888
更新日期:2010-12-01 00:00:00
abstract::Four species of Phocidae, or true seals, inhabit the waters surrounding the Antarctic continent. These animals are thought to have different diving capabilities. The Weddell seal, Leptonychotes weddelli, is known to be capable of attaining depths up to 600 meters. The respiratiory system of the Weddell seal shows the ...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051470306
更新日期:1975-11-01 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
pub_type: 杂志文章
doi:10.1002/jmor.1052040204
更新日期:1990-05-01 00:00:00
abstract::The use of hormone replacement to support limb regeneration in hypophysectomized newts has been the subject of many investigations. Growth hormone, as well as prolactin (PL) in combination with exogenously supplied thyroxine, have all been shown to he effective. However, the bovine growth hormone used to support limb ...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051670109
更新日期:1981-01-01 00:00:00
abstract::The ultrastructure of five epithelial cellular types is described. (1) Absorptive-storing cells possess a striated border and accumulate lipids and glycogen. They also contain an apical multivesicular complex and numerous membrane-bound PAS-positive granules of unknown significance. (2) Zymogenic cells contain numerou...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1052020203
更新日期:1989-11-01 00:00:00
abstract::In spite of the growing interest in rodents with subterranean activity in general and the spalacids (Spalacidae) in particular, little is known about the biology of most members of this clade, such as the Chinese bamboo rat (Rhizomys sinensis). Here, we analyzed the ear morphology of R. sinensis with respect to hearin...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.20519
更新日期:2016-05-01 00:00:00
abstract::Sensory epithelia of the oral tube, a fungiform body anterior to the tentacles and of the terminal knob of tentacles, were studied in Ovatella myosotis by electron microscopy. All three epithelia consist of columnar support cells, sensory cells, and, except in the oral tube, numerous goblet cells. The epithelia differ...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051810307
更新日期:1984-09-01 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
pub_type: 杂志文章,评审
doi:10.1002/1097-4687(200007)245:1<29::AID-JMOR3>3.0.C
更新日期:2000-07-01 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
pub_type: 杂志文章
doi:10.1002/jmor.1051890305
更新日期:1986-09-01 00:00:00
abstract::The structure and crystallography of the internal shell of the pulmonate gastropod slug Limax maximus were studied at the levels of light and scanning electron microscopy, revealing patterns of shell ontogeny and morphogenesis. The calcified portion of the slightly convex ovoid shell is composed of a single palisade l...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051800304
更新日期:1984-06-01 00:00:00
abstract::Sceloporus aeneus exhibits reproductive bimodality. That is, one taxon (Sceloporus aeneus bicanthalis) is viviparous whereas the other (Sceloporus aeneus aeneus) is oviparous. Morphological differences in luteal and oviductal structure were examined. Oviparous and viviparous females have distinct corpora lutea that fo...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051840109
更新日期:1985-04-01 00:00:00
abstract::Septate junctions develop initially just basad from apical junctional complexes at the apical ends of regenerating gastrodermal cells. The first morphological indication of differentiation of the junction is the appearance of gentle undulations of the plasma membranes of apposing cells. Subsequently dense dots develop...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051920303
更新日期:1987-06-01 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
pub_type: 杂志文章
doi:10.1002/jmor.11006
更新日期:2012-01-01 00:00:00
abstract::Nuclear egress, also referred to as nuclear envelope (NE) budding, is a process of transport in which vesicles containing molecular complexes or viral particles leave the nucleus through budding from the inner nuclear membrane (INM) to enter the perinuclear space. Following this event, the perinuclear vesicles (PNVs) ...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.20796
更新日期:2018-05-01 00:00:00
abstract::Tardigrada, commonly called water bears, is a taxon of microscopic panarthropods with five-segmented bodies and four pairs of walking legs. Although tardigrades have been known to science for several centuries, questions remain regarding many aspects of their biology, such as embryogenesis. Herein, we used scanning el...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.20654
更新日期:2017-04-01 00:00:00