Jaime A. Villafaña

7 Questions 18 Answers 0 Followers

Questions related from Jaime A. Villafaña

Does anyone have photographs of jaws or teeth of Carcharhinus species?

Dear all, I am starting a project to estimate the body size of fossil species of the genus Carcharhinus (Neogene of Chile) and compare them with the sizes of current species. The aim is to...

16 September 2024 4,092 0 View

Does anyone know an actual species of myliobatis with this dental plate?.

Does anyone know a actual species of myliobatis with a similar dental plate?. The plates are hexagonal with a high crown, 5 to 6 central rows in the upper tooth plate and 15 central rows in the...

23 September 2015 7,440 7 View

Does anyone know where can I find information on measures of tail spines and dental plates for Myliobatidae family?

I need measures as the total length, disc width , caudal spine legth and dimensions of the dental plates for Myliobatidae family. Best regards

22 September 2015 7,104 7 View

Can anyone help me with the identification of these crustacean?

This record is from Chile (Neogene)

04 June 2015 6,035 7 View

Does someone know the fossil record of the genus Pliotrema?

Recently, I reviewed a serrated tooth like Pristiophorus, this tooth has an approximate age of Late Miocene-early Pliocene Chile. Can this specimen be found in this location?

01 August 2014 3,403 3 View

Any researcher working on Neogene fossil fishes from Japan?

Dear all, I am starting a study on diversification patterns of Neogene fishes (chondrichthyes+bony fishes) from Japan. The main objective is to estimate richness, and rates of origination and...

01 January 1970 9,969 0 View

Does anyone have any idea about this fossil?

Hi all: Any idea of the identification of these fossils?, SW of Valencia (Montesa). Late Cretaceous according to the geological map. Maybe an echinoderm? All the best Jaime

01 January 1970 8,959 20 View