On the Generic Circumscription of <I>Gonolobus</I> (Apocynaceae, Asclepiadoideae): Evidence from Molecules and Morphology

Taxonomic Considerations on Metastelmatinae (Apocynaceae) Based on Plastid and Nuclear DNA

“…Farinaccio 2007;Krings et al 2008;Hechem et al 2011) are likely correlated with multiple events of rapid diversification in Asclepiadoideae (Rapini et al 2007). Under these circumstances, it is postulated that a large morphological diversity is produced in a short time, which is not paralleled by similar rates of molecular evolution (e.g.…”

“…Liede-Schumann et al 2005). Apart from Pentacyphus, internal relationships within the MíDOG clade have recently been investigated (OxypetaUnae by Earinaccio 2007; Gonolobinae by Krings et al 2008; Diplolepis by Hechem et al 2011; Orthosiinae by Liede-Schumann and Meve unpubUshed results; and Metastelmatinae here). The aim of the present study is to present a more comprehensive phylogenetic hypothesis for the Metastelmatinae, and to contribute to a better understanding of relationships within this subtribe.…”

<strong>Towards a stable generic circumscription in Oxypetalinae (Apocynaceae)</strong>

“…Konno & Rapini in Konno et al (2006: 424) to comprise a clearly defined, strongly supported shrubby group that diverged in the initial evolution of the subtribe . Apart from these advances, few phylogenetic patterns have been detected with confidence in the Metastelmatinae; a situation similar to that found in the Gonolobinae (Krings et al 2008).…”

An up-to-date familial and suprafamilial classification of succulent plants

“…Floral characters (especially the architecture of the corona) have been widely used as important indicators of relationship, and were repeatedly employed to justify the topology of classifications. Evidence is growing, however, that floral architectures in general, and coronal structures in particular, are plastic and "evolutionary labile" (Wanntorp et al, 2006 for Hoya;Krings et al, 2008 for Matelea with a "dazzling array of floral variation"). Molecular studies indicate a rapid radiation for the core Ceropegieae (here belong all "Stapeliads") with a very low rate of molecular divergence (Meve & Liede, 2002).…”