The dynamics of stem and crown groups

The dynamics of stem and crown groups | Science Advances

With high turnover, the stem group grows faster initially, lasts longer, and generates a larger crown group; however, it also declines extremely ...

The dynamics of stem and crown groups - PMC

Typically, the stem group diversifies rapidly until the crown group emerges, at which point its diversity collapses, followed shortly by its ...

The dynamics of stem and crown groups - PubMed

The fossil record of the origins of major groups such as animals and birds has generated considerable controversy, especially when it ...

(PDF) The dynamics of stem and crown groups - ResearchGate

Typically, the stem group diversifies rapidly until the crown group emerges, at which point its diversity collapses, followed shortly by its ...

The dynamics of stem and crown groups - bioRxiv

Our results reveal much about the dynamics of stem and crown groups and have an important bearing on how we view the fossil record. In ...

The dynamics of stem and crown groups - FoxHunt Search | Marist

The fossil record of the origins of major groups such as animals and birds has generated considerable controversy, especially when it conflicts with timings ...

The dynamics of stem and crown groups - bioRxiv

Under background conditions, the stem group members must diversify rapidly until the modern crown group emerges, at which point their diversity ...

Diversification dynamics of total-, stem-, and crown-groups ... - Science

We show that the distribution of expected arthropod total-group ages is consistent with molecular clock estimates.

Fig. 1. The dynamics of stem and crown groups. (A) Formation of a...

Download scientific diagram | The dynamics of stem and crown groups. (A) Formation of a living crown group is divided into three phases: (1) stem group only ...

Diversification dynamics of total-, stem-, and crown-groups are ...

Dive into the research topics of 'Diversification dynamics of total-, stem-, and crown-groups are compatible with molecular clock estimates of ...

Dynamics of crown structure and stem growth based on knot ...

On the basis of this analysis, the highest dead branch was regarded as an external indicator for an approximate distinction between the functional crown and the ...

Stem Group and Crown Group Concepts - The Burgess Shale

Diagram representing crown groups and stem groups showing extinct taxa. A stem group consists entirely of extinct organisms that display some, but not all, the ...

Stem and crown group dynamics - Illiam Jackson - WordPress.com

Stem and crown group dynamics ... For my master's thesis I simulated evolutionary trees using birth-death models with variable speciation, extinction and ...

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Tree of Life Reveals Clock-Like Speciation and Diversification

For a given species, the time-to-speciation (TTS), after isolation, must fall between the crown and the stem age of the species (fig. 6a). All lineages younger ...

Estimating clade‐specific diversification rates and palaeodiversity ...

3 Testing shifts at crown or stem age. Originally, the probability of the speciation event at the stem age was included in the likelihood of the ...

Chromosomal dynamics in space and time - Nature

The stem- and crown-group ages for the Mycetophylax clade were reconstructed as 37.4 and 29.9 Ma, respectively (HPD = 39–22 Ma), and ...

Linking evolutionary dynamics to species extinction for flowering ...

Either stem age, diversification rate based on stem and the turnover ratio, or crown age, diversification rate based on crown age and the ...

Aquatic stem group myriapods close a gap between molecular ...

In both cases, the oldest fossils can be assigned to crown group lineages (Diplopoda in the case of Silurian myriapods and Collembola in the ...

Crown group - Wikipedia

C1 and C2 are crown groups of extant species within the clade T – the total group or pan-group – which also contains the stem group S1 of extinct species. The ...