Abstract：
:Analysis of lateral and dorsoventral radiographic films shows that ingestion, transport, and mastication in Pedetes capensis (Rodentia) are cyclic and their movement patterns are essentially similar for the three food types offered. During the ingestion cycle, closing of the mouth is accompanied by a backward translation of the condyles, so that movement is predominantly orthal. During the opening stage, the extent of the anterior condylar translation is smaller. As a result the mandibular incisors move ventrally and posteriorly. During the ingestion cycles, food is transported to the back of the tongue, with the transverse rugae and the folds of the upper lip playing important roles. Springhares show a bilateral masticatory pattern; food is chewed on both sides simultaneously. During chewing, the condyles lie in their most forward position at maximum opening of the mouth. The mouth is closed by rotation of the lower jaw around the temporomandibular joint coupled with posterior condylar translation. At the beginning of the slow-closing stage, the upward rotation of the mandible slows and the jaw slowly shifts forward. During the grinding stage, the mandible is shifted forward with both toothrows in occlusion. During the opening stage, the jaw returns to its starting position. Comparison of kinematic and anatomical data on rodent mastication suggests that some dental characteristics form the most important factors regulating the masticatory pattern and consequently allow reasonably reliable prediction of rodent masticatory patterns.
journal_name
J Morpholjournal_title
Journal of morphologyauthors
Offermans M,de Vree Fdoi
10.1002/jmor.1052050310subject
Has Abstractpub_date
1990-09-01 00:00:00pages
353-367issue
3eissn
0362-2525issn
1097-4687journal_volume
205pub_type
杂志文章abstract：:Light and electron microscopic techniques show that the eye of the marine prosobranch gastropod, Ilyanassa obsoleta, is composed of an optic cavity, lens, cornea, retina, and neuropile, and is surrounded by a connective tissue capsule. The adult retina is a columnar epithelium containing three morphologically distinct...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.1051810207
更新日期：1984-08-01 00:00:00
abstract：:Prey capture in Agama stellio was recorded by high-speed video in combination with the electrical activity of both jaw and hyolingual muscles. Quantification of kinematics and muscle activity patterns facilitated their correlation during kinematic phases. Changes in angular velocity of the gape let the strike be subdi...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.1052240306
更新日期：1995-06-01 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：:The taxonomic history of the small frogs of the genus Pseudopaludicola from South America has been controversial. Phylogenetic inferences based on molecular data have identified four Pseudopaludicola clades, correlating with the known variation in karyotypes (2n = 22, 20, 18, and 16). In this study, the ultrastructure...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.20438
更新日期：2015-12-01 00:00:00
abstract：:Acipenseriformes (sturgeon and paddlefish) are basal actinopterygians with a highly derived cranial morphology that is characterized by an anatomical independence of the jaws from the neurocranium. We examined the morphological and kinematic basis of prey capture in the Acipenseriform fish Scaphirhynchus albus, the pa...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.10095
更新日期：2003-06-01 00:00:00
abstract：:The fiber constituents and connections of the calyces - the input-receiving regions - of the corpora pedunculata ("mushroom bodies") were studied in reduced silver preparations from the American cockroach, Periplaneta americana (L.). In the outer synaptic layer of the calyces five fiber classes were distinguished, the...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.1051420103
更新日期：1974-01-01 00:00:00
abstract：:The median fins in extant actinopterygians are the product of millions of years of evolution. During this time, different developmental patterns for the dorsal and anal fins emerged leading to a high variation in median fin morphology and ontogeny. In this study, the development of anal and dorsal fins in atheriniform...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.20679
更新日期：2017-06-01 00:00:00
abstract：:Although mating has been described in several hermit crab species, the mechanics of spermatophore transfer have not previously been demonstrated. Evidence from pleopod and gonopore morphology, video observations, and inseminated females indicates that in Clibanarius vittatus the male applies a spermatophoric mass dire...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.1118
更新日期：2002-08-01 00:00:00
abstract：:The mammary gland is a common site of neoplasms in the female cat. All the malignant tumors metastasize to a lesser or a greater extent through the lymphatic system. However, the anatomical knowledge of this system is not sufficiently well known in cats to develop a reasoned model for the extirpation of these glands i...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.10403
更新日期：2006-03-01 00:00:00
abstract：:Zambian common mole-rats are subterranean rodents that live in families with only one female breeding. Her offspring remain in the parental nest and do not reproduce. Behavioral experiments (Burda, '95) demonstrated that their apparent "sterility" is based on incest avoidance and individual recognition of family membe...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/(SICI)1097-4687(199807)237:1<33::AID-JMOR3
更新日期：1998-07-01 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
pub_type： 杂志文章
doi：10.1002/jmor.1052250107
更新日期：1995-07-01 00:00:00
abstract：:The light microscopic analysis of serial sections of the subcommissural organ (SCO) of the rainbow trout (Salmo gairdneri) shows that the form of the groove-like (in cross section) organ varies over its total length. Its rostral origin is a tunnel-like structure anterior to the orifice of the hollow pineal stalk. The ...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.1051960307
更新日期：1988-06-01 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
pub_type： 杂志文章
doi：10.1002/jmor.1051720109
更新日期：1982-04-01 00:00:00
abstract：:Anurans exhibit a particularly wide range of locomotor modes that result in wide variations in their skeletal structure. This article investigates the possible correlation between morphological aspects of the hylid postcranial skeleton and their different locomotor modes and habitat use. To do so, we analyzed 18 morph...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.20651
更新日期：2017-03-01 00:00:00
abstract：:Sixty-seven specimens of the common North Atlantic asteroid, Asterias vulgaris, were collected at seasonal intervals over a 2-year period and their testes observed with both light and electron microscopy. In the germinal epithelium, a predictable series of interactions between versatile somatic cells and germinal cell...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.1051660107
更新日期：1980-10-01 00:00:00
abstract：:We have studied the gill epithelium of Oreochromis niloticus using transmission electron microscopy with the particular interested relationship between cell morphology and osmotic, immunoregulatory, or other non-regulatory functions of the gill. Pavement cells covered the filament epithelium and lamellae of gills, wit...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.10821
更新日期：2010-05-01 00:00:00
abstract：:This study examines the allometric scaling relationships of the cetacean humerus, radius, and ulna. Bone lengths and diameters were measured for 20 species of odontocete and three species of mysticete cetaceans, representing eight of the nine extant cetacean families. The scaling of individual bone proportions (bone l...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.1052220208
更新日期：1994-11-01 00:00:00
abstract：:Allografts of skin were observed in Chelydra serpentina. The response to these grafts was modified by a previous transplantation of a limb bud at an early embryonic stage. When the same donor was used for all transplants, the first skin graft was accepted by the host. A second skin graft, however, was rejected at abou...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.1051440407
更新日期：1974-12-01 00:00:00
abstract：:The paired tubular accessory glands in Haemaphysalis longicornis open at the junction of the cervical and the vestibular parts of vagina via short and narrow ducts. The pseudostratified columnar glandular epithelium covered by the muscle layer consists of both secretory and supporting cells. As feeding proceeds, the s...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.1052210105
更新日期：1994-07-01 00:00:00
abstract：:During epidermal differentiation in mammals, keratins and keratin-associated matrix proteins rich in histidine are synthesized to produce a corneous layer. Little is known about interkeratin proteins in nonmammalian vertebrates, especially in reptiles. Using ultrastructural autoradiography after injection of tritiated...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.10181
更新日期：2004-02-01 00:00:00
abstract：:Reproduction was studied in a South Carolina population of the paedomorphic salamander Siren intermedia with emphasis on anatomy of the female oviduct. The oviduct forms 67-79% of the snout-vent length in this elongate species and can be divided into three portions. The atrium, 7-13% of oviducal length, is the narrow ...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/(SICI)1097-4687(199603)227:3<335::AID-JMOR
更新日期：1996-03-01 00:00:00
abstract：:The omphalallantoic placenta is a complex organ that is unique to viviparous squamates. Using transmission EM and light microscopy, we examined this placenta in garter snakes in order to understand its structural organization and functional capabilities. The omphalallantoic placenta is formed from the uterine lining a...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.10084
更新日期：2003-05-01 00:00:00
abstract：:In Japan Pseudopythina tsurumaru is an up to 10.8 mm-long commensal of the burrowing sea cucumber Protankyra bidentata, whereas in Hong Kong the same species is smaller and associated with the crab Hexapus anfractus, itself a commensal of P. bidentata. Japanese P. tsurumaru is a hermaphrodite tending towards protogyny...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.10158
更新日期：2004-10-01 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
pub_type： 杂志文章
doi：10.1002/jmor.1052060311
更新日期：1990-12-01 00:00:00
abstract：:Transmission electron microscopy reveals that the spermatocytes of the hookworm Ancylostoma caninum contain an abundance of Golgi complexes, ribosomes, specialized membranous organelles, and long strands of smooth endoplasmic reticulum. These organelles remain abundant until the early spermatid stage of sperm developm...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.1052030303
更新日期：1990-03-01 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
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
pub_type： 杂志文章
doi：10.1002/jmor.1052070307
更新日期：1991-03-01 00:00:00
abstract：:Correlative studies of luminescent responses, light and electron microscopy of Porichthys photophores during development were conducted. The photophores differentiate as an outgrowth of the basal cell layer of the epidermis, from which they delaminate into the dermis. Reflector cells are formed from dermal fibroblasts...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.1051510305
更新日期：1977-03-01 00:00:00
abstract：:The penises of bats are taxonomically distinctive in size and shape. In addition, they are variable in microscopic anatomy, indicating that histomorphological studies of copulatory organs of bats may help understanding their successful reproductive strategies. We studied adult males of 13 species of vespertilionid and...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.21062
更新日期：2019-12-01 00:00:00
abstract：:The morphology of the spermatozoon of representative species of the subfamily Nesomyinae (Muroidea: Nesomyidae), a monophyletic group of rodents endemic to Madagascar, was examined by light and electron microscopy to determine the sperm head shape and tail length across the species. Marked interspecific differences we...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.10889
更新日期：2010-12-01 00:00:00
