journal
MENU ▼
Read by QxMD icon Read
search

Journal of Morphology

journal
https://www.readbyqxmd.com/read/29315732/ultrastructure-and-distribution-of-sensilla-on-the-maxillary-and-labial-palps-of-chlorophorus-caragana-coleoptera-cerambycidae
#1
Yan-Ru Zhang, Li-Li Ren, Lu Zhang, Rong Wang, Yang Yu, Peng-Fei Lu, You-Qing Luo
Chlorophorus caragana is a species of long-horned beetle that damages Caragana davazamcii Sancz. (Fabales: Papilionaceae) bushes in desert areas in China. The beetles cause substantial damage to local forestry plantations and the environment. Sensilla on the maxillary and labial palps of coleopterans a allow the insects to recognize their host plants. We used scanning and transmission electron microscopy to study the ultrastructure, distribution, and abundance of various sensilla on the maxillary and labial palps of C...
January 8, 2018: Journal of Morphology
https://www.readbyqxmd.com/read/29315711/histological-histochemical-and-ultrastructural-investigation-of-the-male-copulatory-apparatus-of-haminoea-navicula-gastropoda-cephalaspidea
#2
Alexandre Lobo-da-Cunha, Ângela Alves, Elsa Oliveira, Manuel António E Malaquias
Due to its biological and systematic importance, the morphology and function of the male copulatory apparatus of Haminoea navicula, a Cephalaspidea gastropod mollusk, was investigated by light and electron microscopy. These systems are poorly understood in haminoids, but are often used in the taxonomy of the genus. In H. navicula, the male copulatory apparatus comprises the penis within a penial sheath, a seminal duct and the prostate with two lobes. The penis is a muscular structure with a tip covered by spikes formed by muscular cells...
January 8, 2018: Journal of Morphology
https://www.readbyqxmd.com/read/29226521/the-ontogeny-of-the-female-reproductive-system-in-the-parasitic-castrator-pea-crab-calyptraeotheres-garthi-implications-for-its-mating-system
#3
Emiliano H Ocampo, Tomás A Luppi, Eduardo D Spivak, Sebastian Klaus
The knowledge of the mating system of pea crabs is still fragmentary as it remains dubious whether females copulate in the juvenile and free-living 'hard' or in the obligatory symbiotic stages (adult stage 'V' or intermediate stages II to IV). To discriminate between these two possibilities, we analysed the female seminal receptacles, vagina and opercula, and the sperm content in different stages of the pea crab Calyptraeotheres garthi. Our histology and scanning electron microscopy results revealed that in the hard stage the seminal receptacle is simple without secretory epithelia, and vagina and opercula are not controlled by musculature...
December 11, 2017: Journal of Morphology
https://www.readbyqxmd.com/read/29226436/elaborate-ultrastructure-of-the-hirudo-annelida-hirudinae-cocoon-surface
#4
William M Saidel, Naim Saglam, David Salas-de la Cruz, Ralph Saunders, Daniel H Shain
Species of medicinal leeches (Hirudo medicinalis, H. verbana, and H. sulukii) secrete hard-shelled cocoons. When initially deposited, a cocoon is surrounded by a foam. Over a short time, the foam is transformed into a three-dimensional structure. We show here that this peripheral structure likely forms by the solidification and dehydration of a moderately viscous, proteinaceous substance that surrounds bubbles of various sizes. The resulting matrix-like structure comprises a network of curved branches juxtaposed at ∼120° and taper in width as a function of distance from the outer cocoon wall...
December 11, 2017: Journal of Morphology
https://www.readbyqxmd.com/read/29226378/origin-and-transformation-of-the-in-flight-wing-coupling-structure-in-psocodea-insecta-paraneoptera
#5
Naoki Ogawa, Kazunori Yoshizawa
Many four-winged insects have mechanisms that unite the forewings and hindwings in a single plane. Such an in-flight wing coupling apparatus may improve flight performance in four-winged insects, but its structure is variable among different insect groups. The wings of bark lice (Insecta: Psocodea: "Psocoptera") also have an in-flight wing coupling apparatus, but to date, its morphology has not been studied in detail. In this study, we examined the wing-coupling structure in representative species of the three suborders of bark lice (Trogiomorpha, Troctomorpha, and Psocomorpha) and inferred its origin and transformation...
December 11, 2017: Journal of Morphology
https://www.readbyqxmd.com/read/29214665/cephalic-muscle-development-in-the-australian-lungfish-neoceratodus-forsteri
#6
Janine M Ziermann, Alice M Clement, Rolf Ericsson, Lennart Olsson
Lungfishes are the extant sister group of tetrapods. As such, they are important for the study of evolutionary processes involved in the water to land transition of vertebrates. The evolution of a true neck, that is, the complete separation of the pectoral girdle from the cranium, is one of the most intriguing morphological transitions known among vertebrates. Other salient changes involve new adaptations for terrestrial feeding, which involves both the cranium and its associated musculature. Historically, the cranium has been extensively investigated, but the development of the cranial muscles much less so...
December 7, 2017: Journal of Morphology
https://www.readbyqxmd.com/read/29210100/morphological-fine-tuning-of-the-feeding-apparatus-to-proboscis-length-in-hesperiidae-lepidoptera
#7
Harald W Krenn, Julia A-S Bauder
The form and function of the hesperiid feeding apparatus was studied in detail. The butterflies in the family Hesperiidae are of particular interest because the longest proboscis ever recorded in Papilionoidea was found in the Neotropical genus Damas. We focused on the functional morphology by comparing proboscis morphology as well as size and composition of both the stipes pump and the cibarial suction pump in skippers with short and extremely long proboscis. Results revealed that all studied Hesperiidae have the same proboscis micromorphology and sensilla endowment regardless of the proboscis length...
December 6, 2017: Journal of Morphology
https://www.readbyqxmd.com/read/29205455/the-middle-and-inner-ears-of-the-palaeogene-golden-mole-namachloris-a-comparison-with-extant-species
#8
Matthew J Mason, Nigel C Bennett, Martin Pickford
Many living species of golden moles (Chrysochloridae) have greatly enlarged middle ear ossicles, believed to be used in the detection of ground vibrations through inertial bone conduction. Other unusual features of chrysochlorids include internally coupled middle ear cavities and the loss of the tensor tympani muscle. Our understanding of the evolutionary history of these characteristics has been limited by the paucity of fossil evidence. In this article, we describe for the first time the exquisitely preserved middle and inner ears of Namachloris arenatans from the Palaeogene of Namibia, visualised using computed tomography, as well as ossicles attributed to this species...
December 4, 2017: Journal of Morphology
https://www.readbyqxmd.com/read/29194713/intraspecific-variation-in-the-domestic-cat-bony-labyrinth-revealed-by-different-measurement-techniques
#9
Rico Schellhorn
The knowledge of intraspecific variation is important to make assumptions on an interspecific level. To study intraspecific variation in the bony labyrinth morphology of the domestic cat, eleven specimens of Felis silvestris catus and two additional subspecies (F. s. lybica, F. s. ornata) were investigated. The sample comprises skulls of adult males and females, as well as juvenile cats. Each bony labyrinth endocast was virtually reconstructed based on µCT scans. To estimate the radius of curvature of each inner ear semicircular canal, three different approaches were tested...
December 1, 2017: Journal of Morphology
https://www.readbyqxmd.com/read/29194710/links-between-the-discovery-of-primates-and-anatomical-comparisons-with-humans-the-chain-of-being-our-place-in-nature-and-racism
#10
REVIEW
Rui Diogo
I focus on the crucial links between the discovery of nonhuman primates by Westerners, discussions on our place in nature, the chain of being, racism, and the history of primate comparative anatomy and of so-called "anatomical human racial studies." Strikingly, for more than a millennium humans knew more about the internal anatomy of a single monkey species than about that of their own bodies. This is because Galen used monkeys to infer human anatomy, in line with the human-animal continuity implied by the Greek notion of scala naturae...
December 1, 2017: Journal of Morphology
https://www.readbyqxmd.com/read/29178494/microvascular-characteristics-of-the-acoustic-fats-novel-data-suggesting-taxonomic-differences-between-deep-and-shallow-diving-odontocetes
#11
Molly K Gabler, D Mark Gay, Andrew J Westgate, Heather N Koopman
Odontocetes have specialized mandibular fats, the extramandibular (EMFB) and intramandibular fat bodies (IMFB), which function as acoustic organs, receiving and channeling sound to the ear during hearing and echolocation. Recent strandings of beaked whales suggest that these fat bodies are susceptible to nitrogen (N2 ) gas embolism and empirical evidence has shown that the N2 solubility of these fat bodies is higher than that of blubber. Since N2 gas will diffuse from blood into tissue at any blood/tissue interface and potentially form gas bubbles upon decompression, it is imperative to understand the extent of microvascularity in these specialized acoustic fats so that risk of embolism formation when diving can be estimated...
November 27, 2017: Journal of Morphology
https://www.readbyqxmd.com/read/29178202/shape-disparity-of-bovid-mammalia-artiodactyla-horn-sheaths-and-horn-cores-allows-discrimination-by-species-in-3d-geometric-morphometric-analyses
#12
Zachary T Calamari, Ryanna Fossum
The bony cranial structures of even-toed hoofed mammals are important for understanding ecology and behavior of ruminants. Horns, the cranial appendages of the family Bovidae, are covered in a layer of keratin that is often not preserved in the fossil record; however, this keratin sheath is intimately involved in the processes that influence horn shape evolution. To understand the relationship between these two components of horns, we quantified both core and sheath shape for four extant species using three-dimensional geometric morphometric analyses in separate, core- and sheath-specific morphospaces as well as a combined morphospace...
November 27, 2017: Journal of Morphology
https://www.readbyqxmd.com/read/29148085/built-to-bite-differences-in-cranial-morphology-and-bite-performance-between-narrow-and-broad-headed-european-glass-eels
#13
Jens De Meyer, Sam Van Wassenbergh, Mathias Bouilliart, Jelle Dhaene, Dominique Adriaens
The presence of two phenotypes in a single species is a widespread phenomenon, also observed in European eel (Anguilla anguilla). This dimorphism has been related to dietary differences in the subadult elver and yellow eel stages, with broad-heads generally feeding on harder and/or larger-bodied prey items than narrow-heads. Nevertheless, both broad- and narrow-headed phenotypes can already be found among glass eels, the stage preceding the elver eel stage. As these glass eels are considered nonfeeding, we investigate here to what degree the observed variation in head width is reflected in variation in the musculoskeletal feeding system, as well as whether this reflects the same variation observed in the older, dimorphic yellow eels...
November 17, 2017: Journal of Morphology
https://www.readbyqxmd.com/read/29148084/size-shape-and-sex-dependent-variation-in-force-production-by-crayfish-chelae
#14
Brian M Malavé, Joseph M Styga, Ethan D Clotfelter
The ability to generate large closing forces is important for many animals. Several studies have demonstrated that bite or pinching force capacity is usually related to the linear dimensions of the closing apparatus. However, relatively few studies have applied geometric morphometrics to examine the effects of size-independent shape on force production, particularly in studies of crustacean pinching force. In this study, we utilized traditional and geometric morphometric techniques to compare the pinching force of Procambarus clarkii crayfish to their chela morphology...
November 17, 2017: Journal of Morphology
https://www.readbyqxmd.com/read/29148083/macroscopic-and-microscopic-analyses-in-flexor-tendons-of-the-tarsometatarso-phalangeal-joint-of-ostrich-struthio-camelus-foot-with-energy-storage-and-shock-absorption
#15
Rui Zhang, Dianlei Han, Gang Luo, Lei Ling, Guoyu Li, Qiaoli Ji, Jianqiao Li
Flexor tendons function as energy storage and shock absorption structures in the tarsometatarso-phalangeal joint (TMTPJ) of ostrich feet during high-speed and heavy-load locomotion. In this study, mechanisms underlying the energy storage and shock absorption of three flexor tendons of the third toe were studied using histology and scanning electron microscopy (SEM). Macroscopic and microscopic structures of the flexor tendons in different positions of TMTPJ were analyzed. Histological slices showed collagen fiber bundles of all flexor tendons in the middle TMTPJ were arranged in a linear-type, but in the proximal and distal TMTPJ, a wavy-type arrangement was found in the tendon of the M...
November 17, 2017: Journal of Morphology
https://www.readbyqxmd.com/read/29148072/ultrastructure-of-endocrine-pancreatic-granules-during-pancreatic-differentiation-in-the-grass-snake-natrix-natrix-l-lepidosauria-serpentes
#16
Magdalena Kowalska, Weronika Rupik
We used transmission electron microscopy to study the pancreatic main endocrine cell types in the embryos of the grass snake Natrix natrix L. with focus on the morphology of their secretory granules. The embryonic endocrine part of the pancreas in the grass snake contains four main types of cells (A, B, D, and PP), which is similar to other vertebrates. The B granules contained a moderately electron-dense crystalline-like core that was polygonal in shape and an electron-dense outer zone. The A granules had a spherical electron-dense eccentrically located core and a moderately electron-dense outer zone...
November 17, 2017: Journal of Morphology
https://www.readbyqxmd.com/read/29139147/the-development-of-lingual-glands-in-the-domestic-duck-anas-platyrhynchos-f-domestica-3d-reconstruction-lm-and-sem-study
#17
Kinga Skieresz-Szewczyk, Pieter Cornillie, Hanna Jackowiak
The major salivary glands of birds develop by branching or elongation of the epithelial cords. The development of the minor salivary glands in form of the lingual glands has never been described. Among birds, only Anatidae have three types of the lingual glands: rostral, caudo-lateral, and caudo-medial lingual glands. The study aims to characterize the manner and rate of the lingual glands development in the domestic duck and their topographical arrangement relative to the hyoid apparatus. The study reveals that all three types of the lingual glands develop by branching...
November 15, 2017: Journal of Morphology
https://www.readbyqxmd.com/read/29139133/cranial-shape-variation-in-jacarean-caimanines-crocodylia-alligatoroidea-and-its-implications-in-the-taxonomic-status-of-extinct-species-the-case-of-melanosuchus-fisheri
#18
Christian Foth, María Victoria Fernandez Blanco, Paula Bona, Torsten M Scheyer
Melanosuchus niger (Crocodylia, Alligatoroidea) is one of the six living caimanine species widely distributed throughout the Amazon River basin today. Although there is only one extant species of Melanosuchus, fossil material assigned to this genus, represented by M. fisheri, has been reported from the late Miocene in South America. However, the validity of this taxon has been questioned and a recent investigation indicates that the referred specimen of M. fisheri (MCZ 4336) actually belongs to Globidentosuchus brachyrostris, while those diagnostic characters present in the holotype (MCNC 243) fall into the spectrum of intraspecific variation of M...
November 15, 2017: Journal of Morphology
https://www.readbyqxmd.com/read/29119604/anatomy-and-histology-of-the-prostate-and-glands-of-cowper-in-three-species-of-neotropical-bats
#19
María Daniela Miotti, Marcos I Mollerach, Ruben M Barquez
The reproductive accessory glands (RAG) are essential components in reproduction because their secretion products ensure survival, viability, and sperm motility. The objective of this study was to characterize and compare the morphological and histological structure of the RAG in three species of bats of the genus Sturnira (S. erythromos, S. lilium, and S. oporaphilum). The RAG complex comprise a compact gland (prostate), which surrounds the urethra, and a pair of Glands of Cowper at the base of penis. Anatomical and histologically, the prostate are differentiated in two regions, ventral and dorsal...
November 9, 2017: Journal of Morphology
https://www.readbyqxmd.com/read/29098722/the-structure-of-the-cutaneous-pedal-glands-in-the-banded-snail-cepaea-hortensis-m%C3%A3-ller-1774
#20
Janek von Byern, Norbert Cyran, Waltraud Klepal, Livia Rudoll, Johannes Suppan, Sophie Greistorfer
Although gastropods have been crawling through the ocean and on the land for 60 million years, we still know very little about the sticky mucus produced in their foot. Most research has been focused on marine species in particular and, to a lesser extent, on the well-known terrestrial species Arion vulgaris and Cornu aspersum. Within this study, we aim to characterize the foot anatomy of a smaller representative of the family Helicidae, the banded snail Cepaea hortensis. We are particularly interested in the microanatomy of the foot glands, their position, and the histochemical nature of their secretory content...
November 3, 2017: Journal of Morphology
journal
journal
24464
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"