About a cretaceous marine vertebrate? Algeria.

More Mahdjoub Abdalhak's questions See All

Is there a university laboratory that does the extraction of dinoflagellates from sediments for external phd students?

Dinoflagellates.

05 June 2019 4,489 3 View

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

MHC Rabbit Genome Annotation? Domain annotation of each MHC Rabbit Gene?

I want to find a database(s) or a method where I can find and bulk download all the rabbit MHC genes and domain annotation. In humans using Ensembl, all MHC genes have names and domains but in...

28 January 2021 7,722 2 View

What acid can be used to dissolve limestone to extract microfossils?

I am trying to extract possible Loriciferans from mudstone, attempts with acetic acid (15%) and chloridric acid (37%) have failed to dissolve the rock, would a higher concentration (50%) of HCl...

17 December 2020 5,897 7 View

Hybodontiformes - last survivors?

Hello Everyone, I just ran into the work of Boisvert et al., 2019, in which I found fig. 4.2 a bit confusing. It shows, that Hybodontiformes (pale green) survived till the Miocene, however, as...

13 December 2020 5,180 3 View

What really is "Prechordal Plate"?

There is too much discrepency among the textbooks of vertebrate embryology. There are two interpretations of the term "Prechordal plate" in different books: It is the cranial most part of the...

24 November 2020 8,537 1 View

Anyone an expert in algae in Victoria, Australia?

I found this (very pretty) algae (see picture) in a bore-fed and suburban catchment run-off fed, human made lake (Newport Lakes) in Newport, Victoria, Australia. I'm a vertebrate zoologist with a...

09 November 2020 7,587 3 View

How did these marble-like limestone stones formed?

There is a small section of a beach south of Tiros, Greece where most of the gravel is made up of these marble-like stones. While I was there suddenly several waves came ashore, but the sea was...

26 October 2020 5,797 4 View

A white mass inside the head of a cretaceous ant. What can it be?

I have a small piece of Burmese amber with a worker of the stem ant Gerontoformica sp. When focusing the head using incident light, it can be seen a white bilateral structure with several lateral...

26 August 2020 9,688 10 View

Sex-specific Occupancy modeling?

I want to employ Occupancy and Detection probabilitiy estimates for a large vertebrate species. Do you recommend using and running different models with presence-absence matrices by sex (i have...

28 July 2020 6,142 3 View

What is the risk of entomopathogenic diseases acquiring the ability to succesfully infect humans?

I broadly understand the scale at which Zoonoses develop, but would be deeply curious to understand if there is a similar risk of entomopathogenic diseases jumping the biological border to...

27 July 2020 2,239 3 View