Artificial neural networks and geometric morphometric methods as a means for classification: A case-study using teeth from Carcharhinus sp. (Carcharhinidae).

abstract：:Neurosecretory (Nsy) cells within the cerebral ganglion of Lumbricus terrestris were classified ultrastructurally. The Nsy cells within the subesophageal ganglion, nerve cord ganglion, and the peripheral nervous system were also examined. A comparative survey of Nsy cells of four other species of oligochaetes, Eisenia...

journal_title：Journal of morphology

authors： Al-Yousuf S

更新日期：1988-07-01 00:00:00

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：: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

authors： Anctil M

更新日期：1977-03-01 00:00:00

abstract：:The abdominal cerci of the wood cricket, Nemobius sylvestris, are covered by a variety of hair-like sensilla that differ in length, thickness, and articulation. Fillings from the cercal nerves with cobalt chloride and fluorescent dyes revealed the projection of sensory axons into the terminal abdominal ganglion of the...

journal_title：Journal of morphology

authors： Insausti TC,Lazzari CR,Casas J

更新日期：2008-12-01 00:00:00

abstract：:The sharpness and thus information content of the retinal image in the eye depends on the optical quality of the lens and its accurate positioning in the eye. Multifocal lenses create well-focused color images and are present in the eyes of all vertebrate groups studied to date (mammals, reptiles including birds, amph...

journal_title：Journal of morphology

authors： Gustafsson OS,Ekström P,Kröger RH

更新日期：2010-08-01 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

authors： Gross V,Minich I,Mayer G

更新日期：2017-04-01 00:00:00

abstract：:This descriptive electron microscopic study of the blastogenetic medusa development of Podocoryne carnea focuses on the earliest stages of primordium formation, myogenesis, oogenesis and cnidogenesis. The events which take place at the cellular level prior to the formation of stage 1 (Frey, '68), which are characteriz...

journal_title：Journal of morphology

authors： Boelsterli U

更新日期：1977-11-01 00:00:00

abstract：:Body length is one of the most important factors that influence organismal function and ecological niche. Although larger animals tend to have a suite of physiological advantages, such as lower mass-specific metabolic rates and lower costs of transport, they may also experience significant limitations to unsteady loco...

journal_title：Journal of morphology

authors： Kahane-Rapport SR,Goldbogen JA

更新日期：2018-09-01 00:00:00

abstract：:Five types of hemocytes, prohemocytes, typical plasmatocytes, coagulocytes, spherule cells, and oenocytoides, have been defined in the last larval instar of Heliothis armigera on the basis of ultrastructural microscopy, smears, and optical phase-contrast microscopy. Modifications in typical plasmatocytes and coagulocy...

journal_title：Journal of morphology

authors： Essawy M,Maleville A,Brehélin M

更新日期：1985-12-01 00:00:00

abstract：:Branchial food traps are regions of specialized secretory tissue in the tadpole pharynx, where suspended food particles are trapped in mucus. Light and scanning electron microscopy were used to study branchial food traps from larvae of ten anuran families (36 species). Most anuran larvae from "advanced" (suborder Neob...

journal_title：Journal of morphology

authors： Wassersug RJ,Rosenberg K

更新日期：1979-03-01 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 latest research on direct developing caecilian and anuran species indicate presence of only one generation of taste organs during their ontogeny. This is distinct from indirect developing batrachians studied thus far, which possess taste buds in larvae and anatomically distinct taste discs in metamorphs. This stud...

journal_title：Journal of morphology

authors： Budzik KA,Żuwała K,Kerney R

更新日期：2016-07-01 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

authors： Dawson SD

更新日期：1994-11-01 00:00:00

abstract：:The morphometry, histochemistry, and biomechanical relationships of rectus capitis muscles were examined in adult cats. This family of muscles contained six members on the dorsal, ventral, and lateral aspects of the upper cervical vertebral column. Three dorsal muscles (rectus capitis posterior major, medius, and mino...

journal_title：Journal of morphology

authors： Selbie WS,Thomson DB,Richmond FJ

更新日期：1993-04-01 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：:Salamanders possess kidneys with two distinct regions: a caudal pelvic portion and cranial genital portion. Nephrons of the pelvic region are responsible for urine formation and transport. Nephrons of the genital region transport sperm from testes to Wolffian ducts; however, nephrons of the genital region possess all ...

journal_title：Journal of morphology

authors： Hartley J,Gribbins KM,Siegel DS

更新日期：2019-10-01 00:00:00

abstract：:An ultrastructural study was carried out on the secretory activity of the ectal mandibular gland in the wasp Polistes dominulus (foundress and worker females as well as males). Secretory activity in foundresses proceeds slowly during hibernation and early spring, becoming prominent in late spring and then falling shar...

journal_title：Journal of morphology

authors： Fortunato A,Turillazzi S,Delfino G

更新日期：2000-04-01 00:00:00

abstract：:According to the current opinion, lymph-heart striated muscle represents a specialized type of skeletal muscles in frogs. Here, we studied muscle fibers in mechanically damaged lymph hearts during the first postoperative week using electron-microscopic autoradiography. We present evidence that both, the satellite cell...

journal_title：Journal of morphology

authors： Krylova MI,Bogolyubov DS

更新日期：2015-12-01 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

authors： del Castillo DL,Flores DA,Cappozzo HL

更新日期：2014-12-01 00:00:00

abstract：:The wall of the asymmetrical saclike lungs of the fishes Polypterus and Erpetoichthys consists of several functionally different tissue layers. Their lumen is lined by a surface epithelium composed of (1) highly attenuated cells, termed pneumocytes I; (2) pneumocytes II with lamellar bodies, presumably indicating surf...

journal_title：Journal of morphology

authors： Lechleuthner A,Schumacher U,Negele RD,Welsch U

更新日期：1989-08-01 00:00:00

abstract：:Oribatida are one of the main groups of Acari comprising mostly important decomposers in soils. Most species are particle feeders, an exceptional mode of nutrition in Arachnida. Hence, their feeding organs, the gnathosoma, are of special functional interest. We studied nearly all components using scanning and transmis...

journal_title：Journal of morphology

authors： Alberti G,Heethoff M,Norton RA,Schmelzle S,Seniczak A,Seniczak S

更新日期：2011-09-01 00:00:00

abstract：:The morphology of the upper, lower, and pharyngeal jaws is very similar among American cichlids. Common conditions are: (1) the presence of a premaxillary dentigerous arm shorter than the ascending arm (exceptions are Astronotus, Cichla, and Crenicichla semifasciata), (2) a narrow coulter area; in contrast, a broad co...

journal_title：Journal of morphology

authors： Casciotta JR,Arratia G

更新日期：1993-07-01 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：:Mengenillidae is a small, basal family of Strepsiptera, mainly characterized by free-living females in contrast to the endoparasitic females of Stylopidia. Here, we describe external and internal structures of the female abdomen of Eoxenos laboulbenei (Mengenillidae). The external morphology was examined and documente...

journal_title：Journal of morphology

authors： Tröger D,Beutel RG,Pohl H

更新日期：2019-05-01 00:00:00

abstract：:We studied the functional morphology of the female reproductive system of the purple stone crab Danielethus crenulatus. The most remarkable feature is the relative storage capacity and extensibility of the seminal receptacles. These receptacles are a pair of simple sacs that lack internal structures dividing the inter...

journal_title：Journal of morphology

authors： Farias NE,Spivak ED,Luppi TA

更新日期：2017-07-01 00:00:00

abstract：:Spermatogenesis discontinues during both adult reproductive diapause and quiescence in the flightless males of Omorgus freyi. During both types of dormancy, spermatogenesis discontinuity is a dynamic process involving an uninterrupted supply of primary spermatocytes that undergoes partial development and lyses before ...

journal_title：Journal of morphology

authors： Friedländer M,Scholtz CH

更新日期：1993-12-01 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：:Interspecific variations in rhabdom structure between various oplophorid shrimps are described and the differences are related to the light environment at different depths within the mesopelagic zone. The ultrastructure of the distal rhabdom in these species is described for the first time. Quantitative measurements s...

journal_title：Journal of morphology

authors： Gaten E,Shelton PM,Nowel MS

更新日期：2003-07-01 00:00:00

abstract：:Ultrastructural studies of spermiogenesis and sperm morphology have found many characters that are likely to provide clues to the phylogeny of the Platyhelminthes. However, the lack of information on many free-living groups has been a limiting factor. There is a single description of the spermatogenesis and spermatozo...

journal_title：Journal of morphology

authors： Ponce de León R,Volonterio O

更新日期：2018-05-01 00:00:00

abstract：:We investigated if and how the inner ear region undergoes similar adaptations in small, fossorial, insectivoran-grade mammals, and found a variety of inner ear phenotypes. In our sample, afrotherian moles (Chrysochloridae) and the marsupial Notoryctes differ from most other burrowing mammals in their relatively short ...

journal_title：Journal of morphology

authors： Crumpton N,Kardjilov N,Asher RJ

更新日期：2015-08-01 00:00:00