Journal of Morphology
Papers 7173
1 page of 718 pages (7,173 results)
#1Mariela A. Oviedo-Diego (CONICET: National Scientific and Technical Research Council)
#2Camilo I. Mattoni (CONICET: National Scientific and Technical Research Council)H-Index: 11
Last. Alfredo V. Peretti (CONICET: National Scientific and Technical Research Council)H-Index: 14
view all 5 authors...
Mating plugs have been proposed as a mechanism that has evolved to avoid sperm competition. Their structure and composition vary across taxa and are related to the effectiveness of its function. This effectiveness could be related to different evolutionary interests of the sexes. Urophonius brachycentrus and Urophonius achalensis (Scorpiones, Bothriuridae) are highly suitable species to study mating plugs because both are monandrous species with specific morphological and physiological responses...
#1Paul Lukas (FSU: University of Jena)H-Index: 1
#2Lennart Olsson (FSU: University of Jena)H-Index: 18
The vertebrate head as a major novelty is directly linked to the evolutionary success of the vertebrates. Sequential information on the embryonic pattern of cartilaginous head development are scarce, but important for the understanding of its evolution. In this study, we use the oriental fire bellied toad, Bombina orientalis, a basal anuran to investigate the sequence and timing of larval cartilaginous development of the head skeleton from the appearance of mesenchymal Anlagen in post-neurulatio...
#1Francisco Acuña (UNLP: National University of La Plata)H-Index: 1
#2Claudio Gustavo Barbeito (UNLP: National University of La Plata)H-Index: 9
Last. Mirta Alicia Flamini (UNLP: National University of La Plata)H-Index: 7
view all 7 authors...
The uterus is an organ with great plasticity due to the morphological and physiological changes it experiences during the estrous cycle and pregnancy. In mammals, pregnancy requires diverse sex hormones, growth factors and cytokines, among others, for promoting uterine remodeling to favor implantation, placentation, and embryo/fetus survival and growth. The hystricognathi rodent Lagostomus maximus (plains viscacha) has a high rate of embryonic resorption. The cranial and middle implants are reab...
#1Meg L. Martin (Murdoch University)H-Index: 2
#2Kenny J. Travouillon (Australian Museum)H-Index: 12
Last. Natalie M. Warburton (Murdoch University)H-Index: 9
view all 4 authors...
This review examines literature that used physiological cross-sectional area (PCSA) as a representative measure of an individual muscle's maximal isometric force production. PCSA is used to understand the muscle architecture and how a trade-off between muscle force and muscle contractile velocity reflect adaptations of the musculoskeletal system as a reflection of functional demands. Over the decades, methods have been developed to measure muscle volume, fascicle lengths, and pennation angle to ...
#1Alois Lametschwandtner (University of Salzburg)H-Index: 19
#2Bernd Minnich (University of Salzburg)H-Index: 9
We studied the opisthonephric (mesonephric) kidneys of adult male and female Xenopus laevis using scanning electron microscopy (SEM) of vascular corrosion casts and light microscopy of paraplast embedded tissue sections. Both techniques displayed glomeruli from ventral to mid-dorsal regions of the kidneys with single glomeruli located dorsally close beneath the renal capsule. Glomeruli in general were fed by a single afferent arteriole and drained via a single thinner efferent arteriole into per...
#1Anthony M. Carter (University of Southern Denmark)H-Index: 30
Across mammals, early embryonic development is supported by uterine secretions taken up through the yolk sac and other foetal membranes (histotrophic nutrition). The marsupial conceptus is enclosed in a shell coat for the first two-thirds of gestation and nutrients pass to the embryo through the shell and the avascular bilaminar yolk sac. At around the time of shell rupture, part of the yolk sac is trilaminar and supplied with blood vessels. It attaches to the uterus and forms a choriovitelline ...
#1Noah R. Bressman (Wake Forest University)H-Index: 1
#2Jonathan W. Armbruster (AU: Auburn University)H-Index: 20
Last. Miriam A. Ashley-Ross (Wake Forest University)H-Index: 13
view all 5 authors...
In riverine ecosystems, downstream drag caused by fast-flowing water poses a significant challenge to rheophilic organisms. In neotropical rivers, many members of a diverse radiation of suckermouth catfishes (Loricarioidei) resist drag in part by using modified lips that form an oral suction cup composed of thick flesh. Histological composition and morphology of this cup are interspecifically highly variable. Through an examination of 23 loricarioid species, we determined that the tissue most re...
#1Sofia Denisova (SPbU: Saint Petersburg State University)
#2Sergei V. Shchenkov (SPbU: Saint Petersburg State University)
The biology of free-living and parasitic Platyhelminthes is diverse. Taking into account the widespread prevalence of parasitic flatworms, Digenea is the least studied group regarding the fine structure of nervous system especially of the cercarial life stage. Here, we present a description of the fine structure of central nervous system (CNS) and two types of uniciliate sensory papillae of xiphidiocercaria Cercaria parvicaudata (Microphalloidea, Renicolidae). The present study documents that C....
#1Rolf G. Beutel (FSU: University of Jena)H-Index: 42
#2Adrian Richter (FSU: University of Jena)H-Index: 1
Last. Stanislav N. Gorb (CAU: University of Kiel)H-Index: 64
view all 7 authors...
The distal parts of the legs of Sceliphron caementarium (Sphecidae) and Formica rufa (Formicidae) are documented and discussed with respect to phylogenetic and functional aspects. The prolegs of Hymenoptera offer an array of evolutionary novelties, mainly linked with two functional syndromes, walking efficiently on different substrates and cleaning the body surface. The protibial-probasitarsomeral cleaning device is almost always well-developed. A complex evolutionary innovation is a triple set ...
#1Paulo Presti (USP: University of São Paulo)
#2G. David Johnson (National Museum of Natural History)H-Index: 26
Last. Aléssio Datovo (USP: University of São Paulo)H-Index: 7
view all 3 authors...
The Polynemidae is a family of primarily marine fishes with eight genera and 42 extant species. Many aspects of their morphology are largely unknown, with few reports about their osteology and barely any information on their myology. This paper describes and illustrates in detail all facial and branchial muscles of representative species of polynemids. Our analysis demonstrates the existence of several remarkable and previously unknown specializations in the polynemid musculature. The aponeuroti...
Top fields of study