Regenerative cells and the architecture of beetle midgut epithelia.

abstract：:As part of an effort to characterize reproductive modifications in internally inseminating catfishes, ovaries and male reproductive systems were examined histologically in two species of auchenipterid catfishes, Trachelyopterus lucenai and T. galeatus, from southeastern Brazil. Internal insemination was documented in ...

journal_title：Journal of morphology

authors： Downing Meisner A,Burns JR,Weitzman SH,Malabarba LR

更新日期：2000-11-01 00:00:00

abstract：:An extremely large number of fifth ceratobranchial teeth, with highly modified, striated, and hooked tips were observed in the central and western Pacific sicydiine goby genus Stiphodon.A scanning electron microscopic study of the form and arrangement of fifth ceratobranchial teeth was conducted to assess the distribu...

journal_title：Journal of morphology

authors： Parenti LR,Thomas KR

更新日期：1998-09-01 00:00:00

abstract：:Larval and juvenile air breathing fish may experience nocturnal and/or seasonal aquatic hypoxia. Yet, whether hypoxia induces respiratory developmental plasticity in larval air breathing fish is uncertain. This study predicted that larvae of two closely related anabantid fish-the facultative air breather the Siamese f...

journal_title：Journal of morphology

authors： Mendez-Sanchez JF,Burggren WW

更新日期：2019-02-01 00:00:00

abstract：:The posterior half of the channel catfish intestine has a similar histological organization to that of other teleost fishes. This region is organized into a muscosa, a submucosa, a double layered muscularis and a serosa. A "stratum compactum" of dense connective tissue was confirmed for the submucosa. In its histology...

journal_title：Journal of morphology

authors： Krementz AB,Chapman GB

更新日期：1975-04-01 00:00:00

abstract：:Studies of echinoid microscopic anatomy over the last two centuries have created a number of inaccuracies and mistakes that have accumulated in the descriptions of the intricate organization of the coelomic system of Echinoidea. To clarify the situation, we reconstructed the axial complex and radial complex of the ech...

journal_title：Journal of morphology

authors： Ezhova OV,Malakhov VV,Egorova EA

更新日期：2018-06-01 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：:As part of a study of ulcer formation and healing, regeneration of colonic mucosa in rats was studied following placement of a surgical lesion. Alterations in mucosubstances and connective tissue were examined and their possible significance discussed. The sequence of events in healing was: 1) The mucosa adjacent to t...

journal_title：Journal of morphology

authors： Brackett KA,Townsend SF

更新日期：1980-02-01 00:00:00

abstract：:The morphology of ctenostome bryozoans remains little investigated with only few species having been subject to more detailed studies. From all the seven main different superfamilies, only few representatives have been studied. The superfamily Arachnidioidea has particularly been neglected concerning detailed morpholo...

journal_title：Journal of morphology

authors： Schwaha T,De Blauwe H

更新日期：2020-12-01 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：:A biomechanical model of the jaw mechanism in some reptiles is presented. Symmetrical muscle activity that produces equal forces on both sides of the head is assumed. The model predicts the position of the most posterior bit point and offers a functional explanation for this prediction. Turtles are used to illustrate ...

journal_title：Journal of morphology

authors： Druzinsky RE,Greaves WS

更新日期：1979-05-01 00:00:00

abstract：:The feeding mechanisms of two labrid fishes (Cheilinus chlorurus and C. diagrammus: Labridae: Perciformes) are modeled using four-bar linkage theory from mechanical engineering. The actions of the feeding mechanisms are simulated by a computer program that uses morphometric data to calculate the geometry of mechanism ...

journal_title：Journal of morphology

authors： Westneat MW

更新日期：1990-09-01 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：: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：:Cetacean middle ears are unique among mammals in that they have an elongated tympanic membrane, a greatly reduced manubrium mallei, and an incudal crus longum that is shorter than the crus breve. Elongation of the tympanic membrane and reduction of the manubrium is thought to be related to an evolutionary rotation of ...

journal_title：Journal of morphology

authors： Kinkel MD,Thewissen JG,Oelschläger HA

更新日期：2001-08-01 00:00:00

abstract：:The structure of contact chemoreceptors in the cibariopharyngeal pump of the moth Trichoplusia ni (Lepidoptera: Noctuidae) is described. Two types of receptors designated A and B are located on the floor of the pump. Two groups of 9-12 A receptors are located in the anterior part of the pump, and two groups of two B r...

journal_title：Journal of morphology

authors： Eaton JL

更新日期：1979-04-01 00:00:00

abstract：:The innervation of the musculature of the tongue and the hyobranchial apparatus of caecilians has long been assumed to be simple and to exhibit little interspecific variation. A study of 14 genera representing all six families of caecilians demonstrates that general patterns of innervation by the trigeminal, facial, g...

journal_title：Journal of morphology

authors： Wake MH

更新日期：1992-04-01 00:00:00

abstract：:Early spermatids of the onychophoran Peripatopsis capensis are spherical cells with a centrally located nucleus, numerous mitochondria, Golgi complexes, microtubules and two centrioles. During spermiogenesis, Golgi vesicles migrate to one side of the cell where they form a tight aggregate, which is later shed. The mat...

journal_title：Journal of morphology

authors： Camatini M,Franchi E,Saita A

更新日期：1979-01-01 00:00:00

abstract：:The dorsal vessel (DV) in the abdomen of the blood-feeding insect Rhodnius prolixus was divided functionally into two regions, the heart, into which haemolymph entered the DV through four pairs of ostia located in abdominal segment VII, and the aorta, along which the haemolymph was propelled from abdominal segment VI ...

journal_title：Journal of morphology

authors： Chiang RG,Chiang JA,Davey KG

更新日期：1990-04-01 00:00:00

abstract：:Among species of the Chiroptera, spermatogenesis and the fully differentiated spermatozoa differ in morphological and ultrastructural detail. This study therefore aimed to ultrastructurally characterize the spermatogenesis and the spermatozoa of Carollia perspicillata (Phyllostomidae) and compare the process with othe...

journal_title：Journal of morphology

authors： Beguelini MR,Bueno LM,Caun DL,Taboga SR,Morielle-Versute E

更新日期：2014-01-01 00:00:00

abstract：:The liver of the cobia, Rachycentron canadum, was examined by gross dissection, histological, and ultrastructural procedures. Other visceral organs were examined by histological techniques only. Unique perivenous smooth muscle cords are associated with veins in these systems, but they are particularly prominent in the...

journal_title：Journal of morphology

authors： Howse HD,Overstreet RM,Hawkins WE,Franks JS

更新日期：1992-05-01 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

authors： Boyd RB

更新日期：1975-11-01 00:00:00

abstract：:To illustrate vascular modification accompanying transition from aquatic to amphibious life in gobies, we investigated the respiratory vasculatures of the gills and the bucco-opercular cavities in one of the most terrestrially-adapted mudskippers, Periophthalmodon schlosseri, using the corrosion casting technique. The...

journal_title：Journal of morphology

authors： Gonzales TT,Katoh M,Ghaffar MA,Ishimatsu A

更新日期：2011-05-01 00:00:00

abstract：:1. Forty-eight species of oribatids in 37 families representing most of the superfamilies were collected from various environments (littoral, salt marsh, litter, sod, and freshwater) and sectioned. 2. The coxal gland is composed of a sacculus and a labyrinth in all stages of all oribatid species. Muscles, originating ...

journal_title：Journal of morphology

authors： Woodring JP

更新日期：1973-04-01 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 structure of the thumus in adult specimens of a marine teleost, the cling fish Sicyases sanguineus, has been studied by light and transmission electron microscopy. Most cling fishes have an outer thymus located beneath the opercular epithelium. A few of them, however, have a large inner thymus besides a poorly dev...

journal_title：Journal of morphology

authors： Gorgollon P

更新日期：1983-07-01 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

authors： dos Santos JS,Introíni GO,Veiga-Menoncello AC,Recco-Pimentel SM

更新日期：2015-12-01 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：:Reconstruction of limb posture is a challenging task in assessing functional morphology and biomechanics of extinct tetrapods, mainly because of the wide range of motions possible at each limb joint and because of our poor knowledge of the relationship between posture and musculoskeletal structure, even in the extant ...

journal_title：Journal of morphology

authors： Fujiwara S

更新日期：2009-09-01 00:00:00

abstract：:The development of diet-induced phenotypic differences in numbers of sensilla on the antennae of the grasshopper Schistocerca americana was studied using the exuviae produced at each molt. This made it possible to follow changes within an individual insect. In the first instar, insects had similar numbers of four sens...

journal_title：Journal of morphology

authors： Chapman RF

更新日期：2002-11-01 00:00:00

abstract：:The Eurasian lynx (Lynx lynx) is a medium-sized felid, with a tendency to hunt for prey larger than itself. We studied the lynx hindlimb musculoskeletal anatomy in order to determine possible anatomical adaptations to hunting large prey. In our previous work, we had found characters of both large and small felids in t...

journal_title：Journal of morphology

authors： Viranta S,Holmala K,Laakkonen J

更新日期：2021-01-25 00:00:00