Structure of the stomach cuticle in adult and larvae of the spider crab Maja brachydactyla (Brachyura, Decapoda).

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

authors： Cramer ER,Laskemoen T,Stensrud E,Rowe M,Haas F,Lifjeld JT,Saetre GP,Johnsen A

更新日期：2015-04-01 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：:The morphology and probable evolution of the depressor muscles of the lower jaw, innervated by the seventh cranial nerve (VII;M. Ceratomandibularis, M. Depressor Mandibulae), in larval, neotenic, and metamorphosed Urodela were investigated. Observations on innervation and skeletal connections of the muscles were inclu...

journal_title：Journal of morphology

authors： Bauer WJ

更新日期：1997-07-01 00:00:00

abstract：:Oviductal structure is described in New Zealand's common gecko, Hoplodactylus maculatus, over four reproductive stages (early/mid-vitellogenesis, late vitellogenesis, early pregnancy, late pregnancy), using light, scanning electron, and transmission electron microscopy. Five regions of the oviduct are recognized: infu...

journal_title：Journal of morphology

authors： Girling JE,Cree A,Guillette LJ Jr

更新日期：1997-10-01 00:00:00

abstract：:The ovary of the seahorse, Hippocampus erectus, is a cylindrical tube bounded by an outer layer consisting of a mesothelium and muscular wall and by an inner luminal epithelium, with a single row of developing follicles sandwiched between the two layers. Follicles are produced by a germinal ridge, which contains oogon...

journal_title：Journal of morphology

authors： Selman K,Wallace RA,Player D

更新日期：1991-09-01 00:00:00

abstract：:Head structures of the leaf mining larva of the chrysomelid species Podagricomela shirahatai are described and illustrated. Internal and external structures were reconstructed three dimensionally based on image stacks obtained with microcomputed tomography. The larval head is characterized by prognathism, a dorsoventr...

journal_title：Journal of morphology

authors： Hua Y,Beutel RG,Ge SQ,Yang XK

更新日期：2015-04-01 00:00:00

abstract：:In the Mexican axolotl (Ambystoma mexicanum), the pronephros begins to form at the four-somite stage. It is initially continuous with the posterior-lateral region of somite 2 and the lateral margin of somites 3 and 4. By the seven-somite stage, the pronephros has become compacted, and the cells are now morphologically...

journal_title：Journal of morphology

authors： Gillespie LL,Armstrong JB

更新日期：1985-08-01 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：:In Canis and Ursus the largest proportion of attachments of muscles of the shoulder and brachium on the scapula and humerus is direct; fewer attachments are aponeurotic or tendinous. In both genera most attachments can be associated with superficial osteological features (scars or delimitable surfaces); attachments th...

journal_title：Journal of morphology

authors： Bryant HN,Seymour KL

更新日期：1990-10-01 00:00:00

abstract：:Larval salivary gland cells of seven Drosophila species from the melanogaster group were studied during the early third-instar period. Similar cytoplasmic organization was seen in both the distal and proximal parts of the gland. The cytoplasm contained a large number of free ribosomes, but only a few rough endoplasmic...

journal_title：Journal of morphology

authors： Thomopoulos GN

更新日期：1988-10-01 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

authors： LaMassa N,Arenas-Mena C,Phillips GR

更新日期：2018-05-01 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：: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：:Light and electron microscopic examination demonstrated two types of non-endocrine agranular cells, cavity boundary cells and stellate cells, in the adenohypophysis of the South American lungfish, Lepidosiren paradoxa. The cavity boundary cells line the hypophyseal cleft and diverticulum and display few microvilli, oc...

journal_title：Journal of morphology

authors： Chiba A,Oka S,Honma Y,Ishiyama M

更新日期：1991-01-01 00:00:00

abstract：:Comparisons of skull shape between closely related species can provide information on the role that phylogeny and function play in cranial evolution. We used 3D-anatomical landmarks in order to study the skull ontogeny of two closely related species, Lagenorhynchus obscurus and Lagenorhynchus australis, with a total s...

journal_title：Journal of morphology

authors： Del Castillo DL,Viglino M,Flores DA,Cappozzo HL

更新日期：2017-02-01 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：:Histological and electron-microscopical studies of the head-kidney ontogenesis in a group of bottomspawner and mouthbrooder cichlid fishes reveal that this organ undergoes three functional and structural stages. At the initial stage, 2-12 days after fertilization, the head-kidney is a filtering organ of two glomeruli ...

journal_title：Journal of morphology

authors： Fishelson L

更新日期：1996-07-01 00:00:00

abstract：:During suction feeding teleost fish have to start mouth opening prior to other expansion movements of the head such as operculo-suspensorium abduction. The distribution of the input force over the various expansion movements is determined by the position of the hyoid in the expansion apparatus. Based on a three-dimens...

journal_title：Journal of morphology

authors： De Visser J,Barel CDN

更新日期：1996-04-01 00:00:00

abstract：:The locomotory system of Solifugae is distinct from that of other Arachnida in several ways. Only three pairs of legs are involved in locomotion, while the first pair function as sensory appendages. Morphologically, the proximal region of the locomotory system in Solifugae is characterized by fused coxae. Within the p...

journal_title：Journal of morphology

authors： Runge J,Wirkner CS

更新日期：2020-12-01 00:00:00

abstract：:The hypochord of the zebrafish embryo (Danio rerio) emerges at the 9-somite stage as a single row of cells in the dorsomedial endoderm immediately ventral to the notochord. It is recognizable from the 2(nd) or 3(rd) somite and extends along the trunk to the same extent as the somites. A basal lamina surrounds the hypo...

journal_title：Journal of morphology

authors： Eriksson J,Löfberg J

更新日期：2000-06-01 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：: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：:Fourteen species of leiognathid fishes (Perciformes, Leiognathidae) from the Philippine Islands, Thailand, Japan, Indonesia, and Palau were examined for accessory secondary sexual dimorphism. Thirteen species exhibit either external dimorphism (a clear patch of skin on the flanks of males, a large clear patch of skin ...

journal_title：Journal of morphology

authors： McFall-Ngai MJ,Dunlap PV

更新日期：1984-10-01 00:00:00

abstract：:From the elongated neck of the giraffe to the elaborate train of the peacock, extreme traits can result from natural or sexual selection (or both). The extreme chelicerae of the long-jawed spiders (Tetragnatha) present a puzzle: do these exaggerated chelicerae function as weapons or genitalia? Bristowe first proposed ...

journal_title：Journal of morphology

authors： Danielson-François A,Sullivan HN

更新日期：2020-10-19 00:00:00

abstract：:The dorsal fin is one of the most varied swimming structures in Acanthomorpha, the spiny-finned fishes. This fin can be present as a single contiguous structure supported by bony spines and soft lepidotrichia, or it may be divided into an anterior, spiny dorsal fin and a posterior, soft dorsal fin. The freshwater fish...

journal_title：Journal of morphology

authors： Weickhardt AF,Feilich KL,Lauder GV

更新日期：2017-12-01 00:00:00

abstract：:A morphological and cytometric analysis of the adult fat body cells and oenocytes was made on sections of abdomens from immature, mature and senescent Drosophila melanogaster of both sexes. There are about 18,000 fat body cells in abdomens of female and mature male flies. Immature and senescent males have about 12,000...

journal_title：Journal of morphology

authors： Johnson MB,Butterworth FM

更新日期：1985-04-01 00:00:00

abstract：:The forelimbs, along with the crania, are an essential part of the prey-killing apparatus in cats. Linear morphometrics of the forelimbs were used to determine the morphological differences between felids that specialize on large prey, small prey, or mixed prey. We also compared the scaling of felid forelimbs to those...

journal_title：Journal of morphology

authors： Meachen-Samuels J,Van Valkenburgh B

更新日期：2009-06-01 00:00:00

abstract：:Whole body studies of Plotosus tandanus revealed that ampullary pores occur over the entire body of the fish, but are in higher concentrations in the head region. These pores give rise to a short canal (50-60 microm) produced by columnar epithelial cells bound together by tight junctions and desmosomes. At the junctio...

journal_title：Journal of morphology

authors： Whitehead DL,Tibbetts IR,Daddow LY

更新日期：2003-02-01 00:00:00

abstract：:The arrangement of the musculature and the fibers of the extracellular matrix (ECM) in the flexible jaw joint of the sandworm Alitta virens (Annelida, Polychaeta) was studied using dissection and histology. The jaws are capable of a wide range of motions principally related to defense and feeding. The left and right j...

journal_title：Journal of morphology

authors： Uyeno TA,Kier WM

更新日期：2015-04-01 00:00:00

abstract：:The colugos, or flying lemurs (Dermoptera), are arboreal gliding mammals that are commonly grouped with tree-shrews (Scandentia) and Primates in the superorder Euarchonta. However, little is known about the head and neck muscles of these gliding mammals. This raises difficulties for the discussion of not only the func...

journal_title：Journal of morphology

authors： Diogo R

更新日期：2009-01-01 00:00:00