Is this the fragment of a sauropod tooth?

Dear colleagues. Fragments of this species are very rare from a terrestrial Lower Cretaceous locality from Germany. Up to now from this locality sauropods could not be proved with certainty. Other...

14 February 2021 2,310 1 View

Does someone know which structure could exit the olfactory bulbs at their antero-dorsal top ?

Hi people, I am studying bat brains through endocranial casts and I cannot identify which structure could be present in sort of a canal located dorsally to the cribriform plate. It is like...

27 January 2021 797 6 View

Which is the most recent and updated classification of Class: Insecta?

Based on the many publications from several decades, we came across many classifications of Insects. Among them which one is more updated and approved classification that can be used for research,...

05 January 2021 3,668 9 View

How can we say a species of insects got extinct?

02 January 2021 4,232 10 View

What are these bioclasts?

I'm having trouble identifying the round bioclasts indicated by white arrows. Could they be transverse sections of the elements indicated by black arrows? If so, could they be some kind of spicule?

22 July 2020 8,595 13 View

Could anyone provide me any useful website or bibliography to learn about the principles of taxonomy in Biology and Paleontology?

I am an undergraduate and I would like to broaden my knowledge on this subject, beginning by its principles. Maybe it would help that purpose to broaden my knowledge on Phylogenetics as well....

08 June 2020 1,343 2 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...

08 April 2020 5,201 12 View

How can I get individual rarefaction on PAST4 (Paleontological Statistics software)?

Hi, I'm currently working with PAST 4.01 and I have my data organized on a table of 4 columns (treatments) and 45 rows (different bacteria genders) with the amount of genders found in every...

31 March 2020 1,914 1 View

Mammary glands in Platypus ?

Dear researchers, Can anyone help me to identify these odd mammary glands in Ornithorynchus anaticus ? I struggle to understand its mecanism : The secretion from all these flat lobes have a...

03 March 2020 8,275 2 View

What kind of fossil algae is this?

Hi everybody. I found this in a thin section of an oncolitic limestone that belong to late Jurassic - early Cretaceous period (Tithonian-Valanginian). im a begginer in this matters but my first...

01 February 2020 6,783 3 View