Jorge W. Moreno-Bernal

9 Questions 1 Answers 0 Followers

Questions related from Jorge W. Moreno-Bernal

Sauropod-like vertebrate teeth?

Is is possible that Cretaceous fish, notosuchians, lepidosaurs, or other vertebrates have a morphology that might be confused with "spoon-shaped" sauropod teeth? I have seen a fossil isolated...

09 December 2023 7,066 2 View

How to use a Gower matrix to combine continuous and discrete characters into a single dataset?

I have a morphological dataset with continuous and discrete characters, which I want to perform ordination analyses (PCA, PCo, LDA) on the whole dataset, as it was made for this study: The...

08 June 2023 4,014 0 View

Is there a non-parametric "equivalent" of Discriminant analysis?

Discriminant analysis has the assumption of normal distributions, homogeneity of variances, and correlations between means and variances. If those assumptions are not fullfilled, is there any...

16 January 2021 4,608 5 View

How did surface circulation in the Tropical Atlantic Ocean and adjacent regions change in the Cenozoic Era?

I am interested in the Cenozoic history of surface circulation in the Atlantic Ocean, particularly in the subtropical and tropical regions. However, most information I have found so far is related...

16 January 2021 8,015 2 View

Can fossil occurrences be used to estimate dispersal times?

Let us consider a set of fossil occurrences of the same lineage in two separated geographic spaces (e. g., two landmasses, two hydrographic basins, two ocean basins). Given such dataset, would...

14 August 2020 5,051 7 View

Is it better to use base e (LN) or base 10 (LOG10) when making estimates of body mass from linear measurements?

For linear regressions between linear measurements and body mass, which transformation is better to use? base e logarithm (LN)? or base 10 logaritm (LOG10). Apparently they do not make such a for...

09 April 2020 5,448 12 View

In the R package geomorph, how do I interpret the matrix of PC loadings as returned by $rotation?

I have exactly the same question as the person who is asking in this...

02 March 2020 7,480 2 View

Should I use Ordinary Least Squares (OLS) or Reduced Major Axis (RMA) for body size estimates?

Body size (total length or body mass) estimates, derived from linear measurements of skeletal elements (e. g. skull length, molar length, long bone diameter), are commonly used for paleobiological...

24 February 2020 6,858 3 View

Are there any fossil vertebrates with "spatulate" teeth that can be misinterpreted as those of sauropod dinosaurs?

In other words, does any other reptile group have similar teeth? or maybe some sort of mammal incisors that look similar?

15 June 2017 9,659 3 View