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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 44 for “"external morphology"”.
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The external morphology of the first zoeal stages of Cancer magister (Dana), Cancer antennarius (Stimpson), and Cancer anthonyi (Rathbun)
<p>The literature dealing with the larva of Pacific Coast brachyuran crabs is slight. The prominent papers, those of Aikawa (1927, 1928, 1929, 1933, 1937), deal with a variety of genera and offer information useful in determin- ing family relationships. A single paper by Hart (1935) also deal with …
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O gênero Squalus no Brasil: caracterização do grupo megalops e determinação do status taxonômico das formas brasileiras
… group is characterized. According to analysis of external morphology (pectoral fins shape, dorsal fins spines length in comparison with the high of these fins and position of pelvic fins in comparison with dorsal fins), dermal denticles, chondrocranium, vertebral column, dentition and claspers, it …
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Taxonomia e anatomia de cinco espécies do gênero Maytenus (Celastroideae - Celastraceae) ocorrentes no Brasil
… includes descriptions of leaf anatomy and external morphology. Pertinent comments about the morphology, taxonomy, geographic distribution and habitat are presented along with illustrations and a key to identify each of the five species. Anatomical studies, when combined with the external …
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Aspectos da morfologia e biologia de Scinax ruber (Laurenti, 1768) com comentários taxonômicos (Amphibia, Anura, Hylidae)
The adult external morphology, osteology, spermatozoa ultrastructure, and calls from a population of Scinax ruber (Laurenti, 1768) from Magé Rio de Janeiro State, southeastern Brazil) are described. The external morphology of tadpoles is also described. Species from the Scinax ruber and Scinax …
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Population genetic studies of economically important Gracilaria and Gracilariopsis (Rhodophyta) in the south western Cape
… which presents a problem for identification. External morphology lacks taxonomic significance due to the isomorphic nature of terete taxa. It was found that one cannot differentiate between Gracilaria gracilis and Gracilariopsis longissima based on external morphology. Adding to this, it was …
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Estudo sobre as espécies brasileiras de Astraea Röding, 1798 (Mollusca, Gastropoda, Turbinidae)
… 1846), were study based on shell, opercula, external morphology of soft parts, mantle cavity, digestive and urogenital systems, similarities and diferences are regarded and discussed, the respective synonymies are given. The comparative conchology of the Brazilian species with A. (Astralium) …
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Revisão sistemática do gênero Lachesis Daudin, 1803 (Serpentes: Viperidae: Crotalinae)
… relationships among such taxa. Characters of external morphology and hemipenis were used. The Central American species L. melanocephala and L. stenophrys are recognized as distinct species and had your taxonomic status maintained. The South American species L. muta is recognized as monotypic, …
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Revisão sistemática dos Pyrgomorphidae sul-americanos (Orthoptera, Acridoidea)
… revision of the species is proposed based on the external morphology, male and female genitalia. Redescriptions of the genera and species and description of D. volxemi's male are included. The validity of the tribe Omurini is confirmed based on the study of the phallic complex, D. volxemi is …
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The Life History and Contributions to the Ecology of Camelobaetidius variabilis Wiersema 1998 (Ephemeroptera: Baetidae) in Honey Creek, Oklahoma
… Nymph development was assessed using changes in external morphology. Laboratory reared nymphs were used to calculate number of degree days to complete development (772 degree days at 20.8° C ±.38° C), which was used to determine voltinism. Field collected nymph microhabitat distribution was used …
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Macroanatomia, microanatomia e histologia dos sistemas reprodutor e digestivo de Thaumastus (Thaumastus) Taunaisii (Ferussac, 1822), T. (T.) Magnificus (Grateloup, 1839) e T. (T.) Achilles (Pfeiffer, 1852) (Mollusca, Gastropoda, Stylommatophora, Bulimulidae)
… fact that there is a little variation in their external morphology. The microanatomy and the histology of the systems which were studied showed differences that together with the studies of the shell, radula and jaw made it possible to identify and to characterize Thaumastus (Thaumastus) …
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Contribuição ao estudo dos gêneros Lasiodera Gray, 1832 e Philyra Laporte, 1836 (Coleoptera, Cleridae)
… (Coleoptera, Cleridae) with a detailed study of external morphology as well as males external genitalia which made us to propose the separation into two genera, lasiodera Gray, 1832 and Philyra Laporte, 1836, beeing the second one revalidated. Lasiodera orrata (Klug, 1842) and L. voluptuosa …
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Sistemática e zoogeografia do gênero Tomopterus Audinet-Serville, 1833 (Coleoptera, Cerambycidae, Cerambycinae, Rhinotragini)
… of species, based on comparative study of the external morphology and male terminalia, are proposed: bispeculifer group (T. rufotibialis, T. bispeculifer, T. roppai); basimaculatus group (T. basimaculatus); albopilosus group (T. albopilosus, T. grossefoveolatus); obliquus group (T. …
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Morfologia externa da larva de Megadytes giganteus (Laporte, 1834) (Insecta: Coleoptera: Dytiscidae), com evidências sobre a condição monofilética da tribo Cybisterini
… Janeiro States, Brazil (22°56'S, 42º50'W). The external morphology of the three instars larva is described. The larvae of third instar is illustrated. Many of the characters found in larva this species have different states represented in separate groups of Cybisterini or correlatives, …
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Filogenia e classificação dos peixes poecilióideos (Cyprinodontiformes: Cyprinodontoidei)
… analysis included characters of osteology and external morphology and resulted in a single most parsimonious tree with with 607 steps, consistency index 36 and retention index 72. The following topology was obtained: (Jenynsia multidentata ((Aplocheilichthys spilauchen (Procatopus nototaenia …
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Morfologia comparada da laringe dos Pelecaniformes (Aves)
A preliminary description of the external morphology and of the skeleton of the larynx in sevens species, which are representative of all Pelecaniformes families, set anatomical patterns which allow for the caracterization of each one of the groups described herein. lt also allowed for the …
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Taxonomia das espécies de Hyla pertencentes ao grupo de H. Rubicundula Reinhardt & Lutken, 1862 (Amphibia, Anura, Hylidae)
… in which we have studied exclusively the external morphology, by characterizing standards of form and pattern and through multivariate morphometrics analysis (multiple discriminant analysis and principal component analysis). The first results provided thirteen morphospecies, for which were …
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Systematics of the Laurencia complex (Rhodomelaceae, Rhodophyta) in southern Africa
… apart of the SWIO were reassessed by examining external morphology, vegetative anatomy(including corps en cerise counts) and analysing the plastid-encoded rbcL gene sequence data of recent collections. The collection encompassed more than 250 specimens, were primarily from the coastline of South …
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Morfologia e taxonomia das espécies do gênero Discosoma Ruppell & Leuckart, 1828 (Cnidaria, Corallimorpharia) no Brasil
… were examined. The systematic was based on external morphology, anatomy, microanatomy as well as a cnidom qualitativa study. The cnidae were classified according to SCHMIDT (1969, 1972, 1974) and HART0G (1980). The study of cnidom allowed to distinguish the two species on the basis of their …
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The role of lipid in malaria pigment (Haemozoin) formation under biomimetic conditions
… crystals formed seemed to have a distinct external morphology different from Hz itself and thus this was investigated further. Solutions of NLB and haematin in acetone/methanol were mixed by means of vortexing, ultrasonication or micromixing before being used for β-haematin formation …
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A scanning electron and light microscopy study of the red tide dinoflagellate Gymnodinium sp. from False Bay, South Africa
… western Pacific species, with which it has the external morphology in common, (b) Gyrodinium aureolum Hulburt, the North Atlantic species which is common in northern European and eastern USA waters, with which it shares the cell shape and the nucleus position, (c) Ptychodiscus brevis (Davis) …
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