abstract：:The purpose of this study was to clarify the general architecture and morphological variations of the autonomic cardiac nervous system (ACNS) in the African Cercopithecidae (Old World monkeys), and to discuss the evolutionary changes between this system in African/Asian Cercopithecidae and humans. A detailed macroscop...

journal_title：Journal of morphology

authors： Kawashima T,Akita K,Sato K,Sasaki H

更新日期：2007-09-01 00:00:00

abstract：:The structural organization of the spermatozoon from the Eurasian beaver, Castor fiber (Family: Castoridae), was determined and compared to that of other sciuromorph rodents. The beaver spermatozoon has a head, which is variable in form but usually paddle-shaped, with a small nucleus and very large acrosome, and a tai...

journal_title：Journal of morphology

authors： Bierla JB,Gizejewski Z,Leigh CM,Ekwall H,Söderquist L,Rodriguez-Martinez H,Zalewski K,Breed WG

更新日期：2007-08-01 00:00:00

abstract：:The skull of the rare bolyeriid snake Casarea dussumieri is described in detail based on high-resolution X-ray CT data. Bolyeriids are unique in their possession of a separate suborbital ossification and a maxilla subdivided into two movably jointed parts, which may be the result of paedomorphic truncation of the deve...

journal_title：Journal of morphology

authors： Maisano JA,Rieppel O

更新日期：2007-05-01 00:00:00

abstract：:One of the main characters used in acoel taxonomy is the male copulatory organ. Despite this, ultrastructural studies of this structure are scarce. We studied the ultrastructure of the copulatory organ in eight species of acoels belonging to the taxon Childia. Members of Childia possess a well-developed conical or cyl...

journal_title：Journal of morphology

authors： Tekle YI,Raikova OI,Justine JL,Jondelius U

更新日期：2007-02-01 00:00:00

abstract：:Knowledge about the diversity, locomotor adaptations, and evolution of the marsupial forelimb is limited, resulting in an underrepresentation of marsupials in comparative anatomical literature on mammalian forelimb anatomy. This study investigated hand proportions in the diverse marsupial order Diprotodontia. Fifty-tw...

journal_title：Journal of morphology

authors： Weisbecker V,Warton DI

更新日期：2006-12-01 00:00:00

abstract：:The laterophysic connection (LC) is an association between bilaterally paired, anterior swim bladder extensions (horns) and medial openings in the supracleithral lateral line canals that diagnoses butterflyfishes in the genus Chaetodon. It has been hypothesized that the LC makes the lateral line system sensitive to so...

journal_title：Journal of morphology

authors： Webb JF,Smith WL,Ketten DR

更新日期：2006-11-01 00:00:00

abstract：:The design of minimum-weight structures that retain their integrity under dynamic loading regimes has long challenged engineers. One solution to this problem found in both human and biological design is the optimization of weight and strength by hollowing a structure and replacing its inner core with supportive struts...

journal_title：Journal of morphology

authors： Dean MN,Huber DR,Nance HA

更新日期：2006-10-01 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

authors： Callebaut M,Van Nueten E,Van Passel H,Harrisson F,Bortier H

更新日期：2006-07-01 00:00:00

abstract：:Internal and external head structures of males of Strepsiptera were examined and the head of a species of Mengenilla is described in detail. The results suggest a reinterpretation of some structures. The head of basal extant strepsipterans is subprognathous, whereas it is strictly orthognathous in the groundplan of St...

journal_title：Journal of morphology

authors： Beutel RG,Pohl H

更新日期：2006-05-01 00:00:00

abstract：:Slender blindsnakes (Leptotyphlopidae) are known to use a unique feeding mechanism that involves rapid flexions of the tooth-bearing lower jaw. However, the morphology of the leptotyphlopid jaw apparatus has remained poorly studied due to the extremely small size of these snakes. Here I present a detailed description ...

journal_title：Journal of morphology

authors： Kley NJ

更新日期：2006-04-01 00:00:00

abstract：:We describe the cranial ontogeny of an australidelphian marsupial, Dasyurus albopunctatus, using a combination of qualitative and quantitative approaches. We examined in detail qualitative morphological changes of just-weaned individuals as compared to old adults; specifically, changes in 31 morphological structures (...

journal_title：Journal of morphology

authors： Flores DA,Giannini N,Abdala F

更新日期：2006-04-01 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

authors： Raharison F,Sautet J

更新日期：2006-03-01 00:00:00

abstract：:The spermatozoal ultrastructure in three solenocerid shrimps (Solenocera membranacea, S. africana, and Pleoticus muelleri) from different Atlantic locations was examined with the aim of increasing understanding of the phylogenetic relationships in the Dendrobranchiata. A considerable structural similarity between the ...

journal_title：Journal of morphology

authors： Medina A,Scelzo MA,Tudge CC

更新日期：2006-03-01 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：:Mites of the genus Veigaia are common gamasid inhabitants of forest litter. They engage in the peculiar reproductive strategy of podospermy which, along with other morphological and behavioral adaptations, involves modification of the chelicerae of the relatively rare males into gonopods. Each movable digit is provide...

journal_title：Journal of morphology

authors： Di Palma A,Alberti G,Nuzzaci G,Krantz GW

更新日期：2006-02-01 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：: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：:For the first time the scanning electron microscope was used to compare developmental changes in scorpion embryos and the first and second stadia. In the buthid species of this study, Centruroides vittatus, and all other scorpions, the newborn climb up on their mother's back and remain there without feeding for severa...

journal_title：Journal of morphology

authors： Farley RD

更新日期：2005-07-01 00:00:00

abstract：:The morphology of the jaw suspension and jaw protrusion mechanism in lamniform sharks is described and mapped onto a cladogram to investigate how changes in jaw suspension and protrusion have evolved. This has revealed that several evolutionary modifications in the musculoskeletal apparatus of the jaws have taken plac...

journal_title：Journal of morphology

authors： Wilga CD

更新日期：2005-07-01 00:00:00

abstract：:Complete postorbital bars, bony arches that encompass the lateral aspect of the eye and form part of a circular orbit, have evolved homoplastically multiple times during mammalian evolution. Numerous functional hypotheses have been advanced for postorbital bars, the most promising being that postorbital bars function ...

journal_title：Journal of morphology

authors： Heesy CP

更新日期：2005-06-01 00:00:00

abstract：:Ultrastructure and deposition of the cuticles secreted by embryos representing eight insect orders were examined by transmission and scanning electron microscopy. Embryos of the apterygote silverfish Thermobia domestica deposit two embryonic cuticles. Deposition of the first (EC1) is initiated at the beginning of appe...

journal_title：Journal of morphology

authors： Konopová B,Zrzavý J

更新日期：2005-06-01 00:00:00

abstract：:The larval development of "conchostracans" has received only scattered attention. Here I present the results of a study on the larval (naupliar) development and the metamorphosis of Lynceus brachyurus, a member of the bivalved branchiopod order the Laevicaudata. Lynceus brachyurus is the only species of the "Conchostr...

journal_title：Journal of morphology

authors： Olesen J

更新日期：2005-05-01 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：:Little is known about specific proteins involved in keratinization of the epidermis of snakes. The presence of histidine-rich molecules, sulfur, keratins, loricrin, transglutaminase, and isopeptide-bonds have been studied by ultrastructural autoradiography, X-ray microanalysis, and immunohistochemistry in the epidermi...

journal_title：Journal of morphology

authors： Alibardi L

更新日期：2005-05-01 00:00:00

abstract：:Asymmetrical monorchy, or the complete absence of one testis coupled with the presence of its bilateral counterpart, is reported for 174 species of the carabid beetle tribes Abacetini, Harpalini, and Platynini (Insecta: Coleoptera: Carabidae) based on a survey of over 820 species from throughout the family. This condi...

journal_title：Journal of morphology

authors： Will KW,Liebherr JK,Maddison DR,Galián J

更新日期：2005-04-01 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

authors： Downing Meisner A,Klaus AV,O'Leary MA

更新日期：2005-02-01 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：: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

authors： Vivo J,Morales JL,Diz A,Galisteo AM,Monterde JG,Blanco A,Agüera E

更新日期：2004-12-01 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

authors： Lützen J,Jespersen A,Takahashi T,Kai T

更新日期：2004-10-01 00:00:00

abstract：:The enteric nervous system consists of a number of interconnected networks of neuronal cell bodies and fibers as well as satellite cells, the enteric glia. Basic fibroblast growth factor (bFGF) is a mitogen for a variety of mesodermal and neuroectodermal-derived cells and its presence has been described in many tissue...

journal_title：Journal of morphology

authors： Chadi G,Gomide VC,Rodrigues de Souza R,Scabello RT,Maurício da Silva C

更新日期：2004-09-01 00:00:00

abstract：:Anseriform birds were surveyed to examine how the degree of postcranial pneumaticity varies in a behaviorally and size-diverse clade of living birds. This study attempts to extricate the relative effects of phylogeny, body size, and behavioral specializations (e.g., diving, soaring) that have been postulated to influe...

journal_title：Journal of morphology

authors： O'Connor PM

更新日期：2004-08-01 00:00:00

abstract：:The sequential changes during spermatogenesis in the testis of two species of caecilians, Ichthyophis tricolor (Ichthyophiidae) and Uraeotyphlus cf. narayani (Uraeotyphliidae), of Western Ghats of Kerala, India, were traced using both histological techniques and transmission electron microscopy. The cell nests were as...

journal_title：Journal of morphology

authors： Smita M,Oommen OV,Jancy MG,Akbarsha MA

更新日期：2004-07-01 00:00:00

abstract：:After placing in vitro, central subgerminal ooplasm (containing a central nucleus of Pander) from a quail germ disc of a prelaid egg (before symmetrization) on the upper layer of an isolated chicken antisickle, we observed the induction of a radially oriented preneural plate (without interference of chordamesoblast). ...

journal_title：Journal of morphology

authors： Callebaut M,Van Nueten E,Harrisson F,Bortier H

更新日期：2004-05-01 00:00:00

abstract：:The jaw muscle (i.e., masticatory, suprahyoid, and extrinsic tongue) anatomy and mass were examined in four genera of Old World hamsters (cricetine murids), Mesocricetus, Cricetulus, Tscherskia, and Phodopus. The masseter was the largest and most complicated of the muscles examined. In the superficial layer, a few ven...

journal_title：Journal of morphology

authors： Satoh K,Iwaku F

更新日期：2004-04-01 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

authors： Fishelson L,Delarea Y,Zverdling A

更新日期：2004-03-01 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

authors： Alibardi L

更新日期：2004-02-01 00:00:00

abstract：:Two types of sperm are produced in the silkworm, Bombyx mori. Nucleate eupyrene sperm is an ordinary sperm that contributes to fertilization, while anucleate apyrene sperm is considered to play important roles in assisting eupyrene sperm. At the very late stage of spermatogenesis, a phenomenon called "peristaltic sque...

journal_title：Journal of morphology

authors： Sahara K,Kawamura N

更新日期：2004-01-01 00:00:00

abstract：:The correlation between skin structure and hydrodynamic design of the dorsal fin of the harbor porpoise (Phocoena phocoena) was examined. For the study of fin morphology and geometry, a scheme of sampling representing a two-parameter mesh on the fin surface was used. At each data point the thickness of the epidermis, ...

journal_title：Journal of morphology

authors： Pavlov VV

更新日期：2003-12-01 00:00:00

abstract：:Topological and histological analyses of Mabuya mabouya embryos at different developmental stages showed an extraembryonic membrane sequence as follows: a bilaminar omphalopleure and progressive mesodermal expansion around the whole yolk sac at gastrula stages; mesodermal split and formation of an exocoelom in the ent...

journal_title：Journal of morphology

authors： Jerez A,Ramírez-Pinilla MP

更新日期：2003-11-01 00:00:00

abstract：:The outer retinae of adults of 13 atherinomorph species, representing nine different families, were examined by both light and electron microscopy. The retinae were investigated with respect to photoreceptor types, cone densities, and cone patterns. All data were composed to eye maps. This procedure allows an interspe...

journal_title：Journal of morphology

authors： Reckel F,Melzer RR

更新日期：2003-09-01 00:00:00