Consulta: subjectFacets:"Homoplasy"
Registros recuperados: 2
Data/hora: 09/06/2024 05:56:11

Microsatellites retain phylogenetic signals across genera in eucalypts (Myrtaceae)
Provedor de dados: 74
Autores: Ochieng,Joel W.; Steane,Dorothy A.; Ladiges,Pauline Y.; Baverstock,Peter R.; Henry,Robert J.; Shepherd,Mervyn.
The utility of microsatellites (SSRs) in reconstructing phylogenies is largely confined to studies below the genus level, due to the potential of homoplasy resulting from allele size range constraints and poor SSR transferability among divergent taxa. The eucalypt genus Corymbia has been shown to be monophyletic using morphological characters, however, analyses of intergenic spacer sequences have resulted in contradictory hypotheses- showing the genus as either equivocal or paraphyletic. To assess SSR utility in higher order phylogeny in the family Myrtaceae, phylogenetic relationships of the bloodwood eucalypts Corymbia and related genera were investigated using eight polymorphic SSRs. Repeat size variation using the average square and Nei's distance were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Microsatellite phylogeny; Paraphyletic; Homoplasy; Incongruence; Eucalypts.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572007000600016

When is an aster not an aster? A new deep-sea Discorhabdella (Demospongiae, Poecilosclerida) with asters, from the Mozambique Channel
Provedor de dados: 5
Autores: Vacelet, Jean; Cardenas, Paco.
Discorhabdella pseudaster n. sp. is an incrusting sponge from the upper bathyal zone of the 'Banc du Geyser', north of Madagascar, Mozambique Channel This new species is described only from a single specimen but it is remarkable by the presence of spicules similar to euasters, a type of microsclere unknown in Poecilosclerida. These spicules are in fact a new example of homoplasy, being derivatives of the typical Discorhabdella pseudoastrose acanthostyles, which are here reduced to the aster-like tyles. The isochelae with a large lamella on the shaft are also quite unique in Poeciloclerida.
Tipo: Text
Palavras-chave: Porifera; New species; Madagascar; Bathyal; Homoplasy.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00688/79995/82965.pdf