2001) give an older estimate for the origin of the Asterid clade (112-122 my, Table 1) while studies focusing on the Asteridae alone (Bremer et al.
The evaluation of the fossil record started with a literature search of the fossils that have been published as having affinities with groups that today constitute the Asteridae (sensu Bremer et al.
The fossils that were not removed by either filter are not only ambiguous and in need of revision but also potentially the earliest evidence for a family/order of Asteridae, that is, the putative oldest evidence of a lineage.
The fossils accepted as reliable after applying criteria mentioned above were incorporated as minimum age indicators in a phylogeny of the Asteridae following the method of Crepet et al.
The estimated minimum age estimated for the whole of the Asteridae is the Turonian (Late Cretaceous), some 89.
The survey and evaluation of the early fossil record of the Asteridae carried out in this work (Tables 3-14) attempts to provide a list of those fossil taxa that have been described as asterids and their degree of reliability.
It was by following these criteria that the minimum age dating of the Asteridae depicted in Fig.
In contrast to the minimum ages obtained from looking at the fossil record, the estimates based on molecular evidence suggest that the diversification of the Asteridae happened during the Early Cretaceous instead of the Late Cretaceous (Table 15).
In their results, the Asteridae was estimated to have originated 112-122 mya and its diversification to have started some 106-114 mya (Table 15).
This work provides that first step for the early fossil record of the Asteridae.
Monophyly of the Asteridae and Identification of Their Major Lineages Inferred From DNA Sequences of rbcL.
A parsimony analysis of the Asteridae sensu lato Based on rbcL Sequences.
In reality, this type of inflorescence is found, with various minor modifications, in several other families in the Asteridae and elsewhere, including even the Monocotyledonae.
Capitula are amply represented in the Asteridae and can also be found in every other subclass of the Magnoliopsida (see Table II) and even in a few of the Liliopsida.
The capitulum type of inflorescence has a wide distribution in the Asteridae and can also be found in all other subclasses of the Magnoliopsida (sensu Cronquist).