Consulta: subjectFacets:"Parsimony analysis"
Registros recuperados: 4
Data/hora: 06/06/2024 12:33:29

The anatomy and phylogeny of the African land snail Limicena Connolly, 1925 (Pulmonata: Cerastidae)
Provedor de dados: 16
Autores: Mordan, P.
An investigation of the anatomy of Limicena confirms its position as a monotypic genus in the Cerastidae. Phylogenetic analysis places Limicena as the most plesiomorphic member of a clade characterised by a pseudosigmurethrous excretory system, the more advanced members of which are Rhachistia, Amimopina and Edouardia. Its position at the base of such a widely dispersed, advanced clade with apparently xerophilic adaptations lends support to a dispersalist hypothesis for the extra-Afrotropical distribution of the Cerastidae.
Tipo: Article / Letter to the editor
Palavras-chave: Pulmonata; Orthurethra; Cerastidae; Limicena; Anatomy; Pseudosigmurethrous condition; Biogeography; Africa; Parsimony analysis; 42.73.
Ano: 1998
URL: http://www.repository.naturalis.nl/record/215076

The taxonomic significance of the short-shafted mesotriaene reviewed by parsimony analysis: validation of Pachastrella ovisternata Von Lendenfeld (Demospongiae: Astrophorida)
Provedor de dados: 16
Autores: Maldonado, Manuel.
The spicule complement of a demosponge specimen collected from the Atlantic coast of Spain was noted to be similar to that of Pachastrella monilifera, but particularly characterized by the presence of short-shafted mesotriaenes. After detailed examination, it was concluded that the specimen undoubtedly belonged to the species Pachastrella ovisternata Von Lendenfeld, 1894. For a long time, this species has been regarded a synonym of Pachastrella monilifera Schmidt, 1868. Examination of this new specimen showed that Pachastrella ovisternata was a valid species of the genus Pachastrella. Moreover, it denoted the real existence of mesotriaenes in this genus. The parsimony analyses indicated that the species Yodomia perfecta, traditionally assigned to the genus...
Tipo: Article / Letter to the editor
Palavras-chave: Astrophorida; Pachastrellidae; Parsimony analysis; Sponges; Taxonomy.
Ano: 1993
URL: http://www.repository.naturalis.nl/record/504266

Distributional patterns of the American Peiratinae (Heteroptera: Reduviidae)
Provedor de dados: 16
Autores: Morrone, J.J.; Coscarón, M. del C.
Based on distributional data of 40 species of Peiratinae, historical relationships of five Amazonian areas (Paranaense, Atlantic, Pacific, Amazonian, and Cerrado) and two Chacoan areas (Chaco and Caatinga), were investigated through a parsimony analysis of endemicity (PAE). The resulting area cladogram indicates the following sequence of area fragmentation: (Cerrado (Caatinga (Chaco, ((Pacific, Amazonian), (Atlantic, Paranaense))))). It is proposed that these results reflect the gradual development of a diagonal of open formations (Chaco-Cerrado-Caatinga), which separated the former continuous tropical forest into two parts, namely, northwestern (Pacific plus Amazonian) and southeastern (Paranaense plus Atlantic).
Tipo: Article / Letter to the editor
Palavras-chave: Heteroptera; Reduviidae; Peiratinae; Distribution; Patterns; Parsimony analysis; Endemicity; 42.75.
Ano: 1996
URL: http://www.repository.naturalis.nl/record/318686

Biogeography on the early distribution of cuckoos (Aves: Cuculiformes)
Provedor de dados: 103
Autores: Posso,Sérgio R.; Donatelli,Reginaldo J.
Cuckoos are widely distributed, but are concentrated in the tropics, where they occupy a wide range of habitats. Both terrestrial and arboreal behaviors can be found in this group, but there is no consensus on as to whether these behaviors have arisen more than once. Moreover, the historical distribution of cuckoos is poorly understood. This paper presents a biogeographyc analysis of the early history of the distribution of these birds. The analysis was performed by using the Principle of Parsimony based on primary and secondary "Brooks Parsimony Analysis" (BPA). Despite some exceptions, the primary BPA corroborated events of vicariance (general pattern) in the early distribution of cuckoos and a terrestrial ancestor widespread in the Gondwana. The most...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Parsimony analysis; BPA; Cuculidae; Evolution.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702012000300001