Consulta: subjectFacets:"Functional morphology"
Registros recuperados: 13
Data/hora: 09/06/2024 15:43:58

Estructura del aparato reproductor masculino de Uca uruguayensis (Decapoda, Ocypodidae)
Provedor de dados: 76
Autores: Cuartas,Elena Irene; Petriella,Ana María.
The structure of the male reproductive tract was described in Uca uruguayensis Nobili, 1901, by using histological methods, scanning electron microscopy techniques, and stereoscopic observations of fresh material. The aim of this work was to establish the functional changes associated with sexual maturation. The morphology of the first (G1) and second (G2) pair of gonopods was described. The male reproductive tract consists of paired organs: testes, and tubular and convoluted vas deferens (VD) ending with a terminal ampoule (TA).The (VD) is composed of three parts: anterior (AVD), medial (MVD) and posterior (PVD). The AVD and MVD are lined by a single layer of cubical cells. The PVD epithelial cells are columnar with elongated nuclei. The terminal ampoule...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Male reproductive tract; Functional morphology; Crustacea; Brachyura.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212010000100008

Structures adaptatives a la filtration des aliments chez le crabe des sables, Scopimera gordonae
Provedor de dados: 5
Autores: Bauchau, A.
In the sand crab, Scopimera gordonae the buccal appendages are adapted to an efficient mobilization and washing of the sand in order to collect the nutritive elements. These observations confirm the role of Scopimera gordonae in the recycling of the organic material associated with the sand particles.
Tipo: Text
Palavras-chave: Malacostraca; Adaptations; Functional morphology; Mouth parts; Ecophysiology.
Ano: 1987
URL: http://archimer.ifremer.fr/doc/1987/acte-1389.pdf

Oil gland and oil pores in billfishes: in search of a function
Provedor de dados: 5
Autores: Dhellemmes, F.; Hansen, M. J.; Bouet, S. D.; Videler, J. J.; Domenici, P.; Steffensen, J. F.; Hildebrandt, T.; Fritsch, G.; Bach, Pascal; Sabarros, Philippe; Krüger, A.; Kurvers, R. H. J. M.; Krause, J.
Billfishes are well known for their distinctive elongated rostra, i.e. bills. The functional significance of billfish rostra has been frequently discussed and the recent discovery of an oil gland (glandula oleofera) at the base of the rostrum in swordfish, Xiphias gladius, has added an interesting facet to this discussion regarding the potential co-evolution of gland and rostra. Here, we investigated the oil gland and oil pores (through which the oil is brought to the skin surface) of four billfish species – swordfish, Atlantic blue marlin (Makaira nigricans), Indo-Pacific sailfish (Istiophorus platypterus) and striped marlin (Kajikia audax) – and provide detailed evidence for the presence of an oil gland in the last three. All four species had a high...
Tipo: Text
Palavras-chave: Comparative method; Functional morphology; Rostrum; Glandula oleofera; Rete lubricans; Fatty acids; Co-evolution.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00656/76805/77973.pdf

A coral-eating barnacle, revisited (Cirripedia, Pyrgomatidae)
Provedor de dados: 16
Autores: Ross, Arnold; Newman, William A.
The coral-eating barnacle Hoekia monticulariae (Gray, 1831), the only internal parasite among the Thoracica described to this day, is characterized by an irregularly-shaped shell nestled cryptically between the polyps of the hermatypic coral Hydnophora Fischer, 1807, which occurs throughout most of the Indo-West Pacific. Because of its protean form, cirripedologists have failed to appreciate the diversity of taxa related to Hoekia, , a presumed monotypic genus. We describe seven new species divided between Hoekia and three new genera, Eohoekia, Parahoekia, and Ahoekia for which the Tribe Hoekiini is proposed. As in other pyrgomatids, calcareous overgrowth by the coral is inhibited around the edge of the wall and aperture. But in Hoekiini a pseudopolyp,...
Tipo: Article / Letter to the editor
Palavras-chave: Cirripedia; Pyrgomatidae; Hoekia; Coral-eating barnacles; New species; Parasitism; Functional morphology.
Ano: 1995
URL: http://www.repository.naturalis.nl/record/504389

Defensive enrolment in mantis shrimp larvae (Malacostraca: Stomatopoda)
Provedor de dados: 16
Autores: Haug, C.; Haug, J.T.
We describe a possible new defensive behaviour of larval stages of mantis shrimps (Stomatopoda). Mantis shrimp larvae are rarely observed in nature, thus the study is based on postures of museum material and functional morphological aspects. Specimens described here are tightly enrolled, their pleon is bent forward,and the telson is locked into the frontal margin of the shield. This margin has two lobes into which the two posterolateral spines of the telson fit. The shield shows further adaptions to enrolment; e.g., the ventral gape of the shield perfectly matches the width of the pleon and leaves no major gaps when the pleon is bent forward. Based on these observations, we briefly discuss the possibilities to infer behavioural aspects from functional...
Tipo: Article / Letter to the editor
Palavras-chave: Defensive behaviour; Functional morphology; Marine larvae; Museum material; 42.74.
Ano: 2014
URL: http://www.repository.naturalis.nl/record/480045

Functional morphology and fur patterns in Recent and fossil Panthera species
Provedor de dados: 16
Autores: Nagel, D.; Hilsberg, S.; Benesch, A.; Scholz, J.
According to caves drawings, male specimens of ice age cave lions lacked a mane. Ethological observations of the recent subspecies showed the significance of the mane of male lions (Panthera leo) in intraspecific social interaction. For the Pleistocene lion, there are two possible implications; the social system was different from the modern subspecies or the cooler climate did not allow the development of manes. Whereas the former can only be discussed, the latter is supported by evidence based on infrared thermography and considerations on thermoregulation. Thermal images of the recent subspecies clearly demonstrate the significance of mane development in terms of functional morphology. Probably, manes in felids can develop in warm climate only. The mane...
Tipo: Article / Letter to the editor
Palavras-chave: Cave lion; Fur pattern; Functional morphology; Pleistocene; 42.84; 38.22.
Ano: 2003
URL: http://www.repository.naturalis.nl/record/219302

Locomotory behaviour and functional morphology of Nematostella vectensis (Anthozoa: Actiniaria: Edwardsiidae): a contribution to a comparative study of burrowing behaviour in athenarian sea anemones
Provedor de dados: 16
Autores: Williams, R.B.
The locomotory behaviour and functional morphology of English populations of a small (&lt;2 cm long), burrowing athenarian sea anemone, Nematostella vectensis Stephenson, 1935 (= N. pellucida Crowell, 1946), which lives in soft mud in salt marshes and creeks, are described. Objectives were to ascertain the specific stimuli and environmental conditions determining when and how locomotion is employed, and to assess survival values. Experimentation and anatomical examination revealed how anemones move, and their functional morphology was interpreted in a physiological context. Finally, locomotion, morphology and habitat were compared for several athenarian anemones, to ascertain what correlations there are, if any. Essential environmental conditions for N....
Tipo: Article / Letter to the editor
Palavras-chave: Behaviour; Burrowing; Climbing; Creeping; England; Functional morphology; Locomotion; Musculature; Nematostella vectensis; Rugae; Sea anemones; 42.79.
Ano: 2003
URL: http://www.repository.naturalis.nl/record/220581

Mecistocephalidae), with the description of a new species with unusually elongate denticles
Provedor de dados: 16
Autores: Bonato, L.; Minelli, A.
As a contribution to investigate the interspecific diversity in the large genus Mecistocephalus Newport, 1843 with respect to these centipedes’ predatorial role in soil tropical communities, we compared the patterns of maxillipede denticles in 32 species of the genus, and studied all published relevant information. All Mecistocephalus species share a conservative pattern of six distinct denticles on the mesal side of the four articles of each maxillipede. Current views on centipede phylogeny suggest that the basic pattern in Mecistocephalus originated from an ancestral array of fewer denticles, by addition of other denticles on the first and fourth articles of the maxillipede. These patterns are not affected by sexual dimorphism, and intraspecific...
Tipo: Article / Letter to the editor
Palavras-chave: Chilopoda; Functional morphology; Geophilomorpha; Maxillipede; Mecistocephalus; Mecistocephalus megalodon n. sp.; Predation; 42.74.
Ano: 2009
URL: http://www.repository.naturalis.nl/record/315810

Allometry and ontogeny in Callibia diana Stål (Mantodea: Acanthopidae)
Provedor de dados: 82
Autores: Avendaño,J; Sarmiento,CE.
The life-cycle of Callibia diana Stål is described and linear and geometric morphometrics are used for studying allometrics and shape changes throughout this neotropical mantid species' life-cycle. Significant changes were expected in the allometry and shape of the raptorial leg and abdomen, given the importance of hunting and reproduction. The allometric slopes were obtained by using total length as the independent variable. Geometric morphometrics of landmarks were used for frontal femur and tibia. Hunting and reproduction-related structures had the steepest slopes and positive allometries. Negative growth of both disc width and head width found in the last moulting event may be a consequence of prothoracic muscle growth which is responsible for...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Raptorial leg; Resource allocation; Geometric morphometrics; Hunting strategy; Functional morphology.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2011000400009

Geometric morphometric analysis of cyclical body shape changes in color pattern variants of Cichla temensis Humboldt, 1821 (Perciformes: Cichlidae) demonstrates reproductive energy allocation
Provedor de dados: 83
Autores: Reiss,Paul; Grothues,Thomas M.
Previously recognized color and pattern variants of adult Cichla temensis in Amazon flood pulse river environments reflect the cycling of individuals through seasonal sexual maturity and spawning. Individuals also vary in shape from blocky to fusiform. To determine if shape differences are related to patterns of fat reserve deposition and utilization, and to quantify the relationship of shape with color and pattern variation and life history status, specimens in each of four previously defined grades of color and pattern variation were compared using geometric morphometric techniques. Progressive shape changes occurred between grades independent of sex and correlated to gonosomatic index (GSI). Thin plate spline deformation visualizations indicate that the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fat reserves; Functional morphology; Gonadosomatic index; Hepatosomatic index; Physiology.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252015000100103

Contributions to the study of the comparative morphology of teeth and other relevant ichthyodorulites in living supra-specific taxa of Chondrichthyan fishes. Part B. Batomorphii: 1c. Order Rajiformes - Suborder Rajoidei - Family: Rajidae - Genera and Subgenera: &lt;i&gt;Arhynchobatis, Bathyraja richardsoni-&lt;/i&gt;type, &lt;i&gt;Cruriraja, Irolita, Notoraja, Pavoraja (Insentiraja), Pavoraja (Pavoraja), Pseudoraja, Raja (Atlantoraja), Raja (Okamejei)&lt;/i&gt; and &lt;i&gt;Rhinoraja&lt;/i&gt;
Provedor de dados: 27
Autores: Herman, J.; Hovestadt-Euler, M.; Hovestadt, D.C.; Stehmann, M.
Part B, Nos. 1a and 1b of this series, comprising of the Batomorphii the first and the second sections on the Rajoidei, is continued with the last group of rajoid taxa as far as material was available. The tooth morphology of representatives of eleven more genera and subgenera, namely &lt;i&gt;Arhynchobatis, Bathyraja richardsoni-type, Cruriraja, Irolita, Notoraja, Pavoraja (Insentiraja), Pavoraja (Pavoraja), Pseudoraja, Raja (Atlantoraja), Raja (Okamejei)&lt;/i&gt; and &lt;i&gt;Rhinoraja&lt;/i&gt;, is described and illustrated by SEM-photographs. Differential diagnoses and systematic interpretations are presented as a result of the odontological examinations described here and in the previous two issues 1a and 1b for the supraspefic taxa of the Rajoidei.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Functional morphology; Marine fish; Taxonomy; Teeth; Rajiformes.
Ano: 1996
URL: http://www.vliz.be/imisdocs/publications/294448.pdf

External morphology of Cotesia flavipes (Hymenoptera: Braconidae) during larval development
Provedor de dados: 103
Autores: Pinheiro,Daniela O.; Rossi,Guilherme D.; Cônsoli,Fernando L.
Cotesia flavipes (Cameron, 1891) (Hymenoptera) is a gregarious endoparasitoid used in applied biological control against Diatraea saccharalis (Fabricius, 1794) (Lepidoptera). In this study, we characterize the larval external morphology and the number of instars of C. flavipes. Parasitized larvae of D. saccharalis were sampled from the 1st to the 10th day after parasitism and dissected in an anticoagulant buffer for collection of C. flavipes immatures. Immatures were processed for scanning electron microscopy. Larvae of C. flavipes were prepared in NaOH solution and slide mounted to allow for mandible size measurements. Analysis of measurements of the parasitoid larval mandible size indicated that C. flavipes has three instars. Newly hatched larvae are...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Anal vesicle; Biological control; Functional morphology; Ultrastructure.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702010000600022

Hindlimb musculature and function of Neuquensaurus australis (Sauropoda: Titanosauria)
Provedor de dados: 41
Autores: Otero,Alejandro; Vizcaíno,Sergio F.
We present the reconstruction of the hindlimb musculature of the titanosaur sauropod Neuquensaurus australis (Lydekker), integrating data from crocodilians and birds as a phylogenetic bracket. First, we evaluate sites of origin and insertions in N. australis by comparison with extant archosaurs as well as with previous works on dinosaur soft anatomy, and reconstruct principal muscles of the leg, such as Triceps femoris group, M. iliofibularis, Mm. adductores femores, Mm. gastrocnemii, M. ischiotrochantericus and Mm. caudofemorales. Second, we infer the probable function of each muscle comparing with our bracket taxa and with living analogs, principally mammals, because they are thought to be the best model to understand non-avian dinosaur locomotion. This...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Archosauria; Extant Phylogenetic Bracket; Soft tissue; Functional morphology.
Ano: 2008
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0002-70142008000200007