Questions related to Invertebrate Paleontology
I would love to know anyone's thoughts about types of data that would be useful in an open database. I live in the US, and traveling to museums to measure ammonites is not possible for all of the students I encounter or work with.
The database I've started (ammodata.wordpress.com) is similar to Open Dino and not really like Mindat or PBDB, and it makes data easily shareable so that anyone who downloads it has what they need to do a basic ammonite research project, even without access to travel funds, museums, or the best specimens. It mostly has data I myself already have, but I am looking to add coiling and W/D other data as well.
We have obtained some electron micrographs showing what appears to be developmental stages of some type of small eukaryotic organism colonizing/parasitizing the tissues of mammalian hosts. Samples tested included sterile deep needle aspirate of subcutaneous nodules, filtered lysed whole blood, and urine sediment. The hosts may have a unique genetic defect allowing them to become infected with eukaryotic parasites, or, the putative parasite may have efficient strategies for suppressing the hosts immune response.
We are curious about the identity of this possibly novel organism. None of us in the research group have more than basic knowledge of invertebrate taxonomy, but based on the presence of organized calcified “tube or shell”-like structures, we are hypothesizing that it may be some type of polychaete or mollusk? The opinion or thoughts of anyone skilled in such classification would be very appreciated. Thanks!
Is there a simple and quick way to differentiate those two types, or do we use a special 'key' for that?
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, academics and teaching purpose?
We are a group of veterinarians looking into repeatable findings of unusual structures found in a group of animals with similar unusual complaints of unexplained hematuria, tender subcutaneous nodules, and easy fatiguability. We have repeatably found tiny fibers and tube or shell-shaped calcified structures in tissue samples from these animals. So far, we have been unable to definitively characterize the species that may be producing these objects, but light and electron microscopic studies have led us to consider a novel polychaete or mollusk, or even possibly something really unusual such as an organized myxozoan. One of the most obvious and unusual features of these organisms is that they contain fibers (possibly chaetae?) that can evert plume/fan-like structures from their tips, and sometimes from portions along their lengths. These fibers are quite small- generally only 5-10 microns wide, and potentially 200-400 microns long. Despite their small size, they repeatably contain a very intricate and complex system of pulleys, levers, ratchets, etc.. that we presume are present to evert the fan-like structures- which may be used for respiration/feeding? The fibers are highly refractive, and seem to contain tiny crystalline "gears". Portions of the fibers will stain with crystal violet and/or Safranin O, but in general, the fibers stain poorly with the standard H&E type histology stains. In addition to the fibers, there are often structures seen which resemble trophozoite stages of polychaete or mollusk-like organisms. (photos available in data files related to this project).
Is anyone familiar with organisms that have these features? We would be very grateful for any thoughts about what organism these fibers may be coming from, and/or links to any reference papers or atlas etc... that describes these structures and might help us focus our search for an identify of this possible novel parasitic organism. While we began our search in the veterinary patient population, we have evidence suggesting that this putative organism may be a zoonotic agent to immunosuppressed human patients. So, we are very eager to learn more about the candidate organisms that could produce such fibers, and relay those suggestions to the physicians of human patients who may be hosts of this possible novel pathogen.
Thanks you for your time and expertise!
I found it in a thin section of a Jurassic-Cretaceous marine limestone which corresponds to shoreface facies.
Can it be worm tubes? a foraminifer? Any other ideas of what it can be precisely? (Photos taken with 5X objective).
I read you. Thank you.
I am looking for a pdf versión of the Part K. MOLLUSCA 3 (Cephalopoda General Features, Endoceratoidea, Actinoceratoidea, Nautiloidea, Bactritoidea) Treatise on invertebrate paleontology.
Most authors agree that the oldest paraconodonts like Protohertzina derive from the "Anabarites trisulcatus - Protohertzina anabarica Zone". According to the geological time-scale 2016 (Ogg et al. 2016), this would yield a minimum age of about 532.7 Ma. Of course, Protohertzina already occurs at the base of this zone, so my question would be are there any earlier "First Appearance Data of Protohertzina" or other early protoconodonts which are bounded below radiometric age or can be reasonable correlate to an interval below 532.7Ma. Your help would be greatly appreciated.
I am doing research on algae from the Upper Cretaceous of Colombia, South America. The algae I am working with is approximately 5 to 30 µm in size. The individuals have a well defined "head" or "cap", a well developed "thallus" or "stipe" (I can't tell the difference) and a noticeable "holdfast". Because these are fossil forms, about all I have to work with is the external morphology (size and shape). Some forms have the same general shape as, Udotea, some have a "flower-looking" cap as Acetabularia, and some are more globose in shape with a short stalk and holdfast as in the genus Ulva. I can not find anywhere in the literature where they have been reported and, in the field of paleontology, I have nobody that seems to be interested in talking with me. I am will to share my photographs online with anyone. It would be a real help to know what the environment of deposition was. I am assuming that it was probably shallow, clear and quite water (because of their size) but I am not sure. Any help would be appreciated.
I recently read on Catalogue of Organisms (http://coo.fieldofscience.com/2014/05/wasps-with-fangs-on-their-feet.html) that pimpline ichneumonid wasps have enlarged claws on their hind tarsi that may or may not contain a fluid used in defense or host incapacitation. I was wondering if anyone happened to have pictures of these claws, as I cannot find any pictures of them anywhere (and being a vertebrate specialist am not sure where to look) or knows if there are any potential representatives of this group in the fossil record.
We found this rotifer in Arenal Reservoir, Costa Rica. We've been trying to identify it, but the rear end does not seem to conform with usual pictures or drawings of the two most likle genera: Ascomorpha or Asplanchna. We just want a confirmation of our most likely bet: Ascomorpha. We appreciate any sugestions. Thanks!
John Huntley and myself are currently guest-editing two volumes for Topics in Geobiology on the evolution and fossil record of parasitism and are having trouble finding a researcher to contribute a chapter on The Evolution and fossil record of insects as vectors and hosts for parasites. Insects are common hosts for various parasites and pathogens which in some cases can even cause characteristic diseases and pathologies in them. Would there be any (paleo)ecologists, paleontologist, parasitologists or evolutionary paleobiologist who might be able contribute such a chapter this year. We will sent it out for review in addition to reviewing it ourselves. Please sent me an private message or e-mail with a potential outline or potential contributors.
Preferably if lives in Mexico or knows mexican specimens. I found several of them at "Sierra Huichola" (western Mexico) and I'm looking for someone to analyze them. You can see full catalogue at:
In summer 2007 I could find several fossil objects (see fotos attached) of an interesting bivalve or ostracod at the Lower Miocene location "Altheim-Breitenlauh" ~15 km southwest of Ulm (Upper Swabia, Southwest Germany). The fossil remains were found in an iron-bearing sand layer at the base of the so-called "Grimmelfingen Beds" (Brackish Water Molasse resp. "Brackwassermolasse" within the geological structure of the "Graupensandrinne").
The total shell length amounts between ~1,5 cm and ~3,0 centimeters!
Can anyone help me to identify this invertebrate fossils from the base of the "Grimmelfingen Beds" (Brackish Water Molasse, Lower Miocene) in Southwest Germany?
Thanks and best wishes;
I am working with unionid bivalves from the Upper Jurassic Morrison Formation and have found what I believe is a new genus. I am currently reviewing the Smithsonian collection of Yen and the Missouri collection of Branson. I am looking for someone to help me describe the specimen and publish the description.
I am working on low latitude Paleogene shallow marine fauna of W India and would like to understand the trophic scenario of this fossil community. Where can I find relevant information on extant shallow marine fauna for comparison?
On behalf of Kerman coal company I am going to prepare a geological report about the quality of Kerman coal mines and I need some data about coal thin sections ,may I ask you to send me usefull reports or articles or introducing suitable books .Thanks a lot?.
I am compiling some data from the Cretaceous of North Colombia so I would like to know the geological range of these ammonites.
In the year 1990 I could find an interesting fossil object (see fotos attached) in the Solnhofen Formation ("Solnhofener Plattenkalke", Malm Zeta 2b) at the locality "Blumenberg" near Eichstätt (Bavaria, South Germany). I don't know to what animal, perhaps to a cephalopod (? nautiloid or ammonoid jaw fragment), this fossil remain belongs to!
The scale/dimension of the fossil object is the following: 4,5 x 2,7 centimeter (max. length x max. wide); the convex surface shows little "points" and "fold structures".
Do you have an idea, to what animal this Upper Jurassic fossil belongs to? Please give me informations and/or fotos for comparisons!
Thanks very much;
Hi, can anyone help me to identify this vertical trace fossil? I really appreciate it. Info: it was found in an Early Jurassic (Sinemurian-Pleinsbachian) marginal marine setting and it was located in siltstones. The first photo (a) corresponds to a cross-section view, whereas the second photo (b) is a lateral view. Scale is 2 mm.
Thank very much in advanced!
How to study Cretaceous benthic foraminifera from fragile carbonate material? You can also suggest suitable literature.
This specimen corresponds to the early-medium Devonian in a siliciclastic sequence. I consider that it is a orthida, but I can not find jobs where it is described. It is a brachial valve: Do you know the specimen? What gender can it belong to?
Dr. María Lidia Sánchez
I have recovered this specimen from oligo/Miocene horizon, the type of associated fossils belong to fossil fish and may be belong to fish othilith?
Note: the scale is 5 mm using the square that contained the specimen.
Please help in the identification of the taxa associated with Distichoplax and other algal fragments observed in the attached images. I have marked with arrows where specific demarcation is required.
Hello, where can I find the following papers by Alexander Tornquist:
TORNQUIST, A: 1910 Der baltische Bernstein ; Einleitung in das Verständnis der Kgl. Bernsteinsammlung des Geologischen Instituts in Königsberg i. Pr. - 25 S., mit Abb. u. Ktn., Berlin (Borntraeger).
TORNQUIST A 1910 Die in der Königl. Universitäts-Bernsteinsammlung eingeführte Konservierungsmethode für Bernsteineinschlüsse. - Schriften der Physikalisch-ökonomischen Gesellschaft zu Königsberg in Preußen 51: 243-247, Königsberg?
Thank you, gratefully acknowledged!
Elphidium gunteri has been identified in Plio-Pleistocene sediments in the Salton Basin. I'm attempting to determine whether or not this species arrived via a marine incursion from the Gulf of California. (The other possibility is avian transport.)
An arthropod measuring ~3 mm was found on the body of a rescued Indian Flying Fox (Pteropus giganteus) from Kohora Range, Kaziranga National Park, Assam, by a local NGO named NRSB, Bochagaon. The arthropod was observed wriggling on the soft fur of the rescued specimen. The images of the same are attached herewith for identification (4X magnification).
i have some Brittle stars in my samples
samples have been collected from soft bottom, Persian Gulf, Iran
10 M depth
the specimen are juvenile, and i want to know, is it possible that they be identified?
is it necessary to take SEM photo of them, or only the adult can be identified?
for example i send 3 photo of them
We are currently describing a fossil insect wing from this locality. As not much fossil insects from this period are known it could be of general interest
The internal moulds of a Cambrian micromolluscan species: Pelagiella madianensis are from North China. Do these concave areas and the radial ridge (very common ) indicate the muscle scars or any other soft parts?
Since Darwin's time there has been much paleontological research that either supports or does not support Darwin's theory. Please give specific examples from the fossil record
what is the major difference between nummulites sp., Assilina sp. and Operculina and I need to differentiate between them in the sedimentary thin section and their impact on the depositional environment
When I read some articles, I found the time was not consistent to the geological time scale. For example, In the Article Archaefructaceae, a new basal angiosperm family ( Sun G, 2002), the fossil was inferred 124.6 mya, and arttributed to upper Jurassic of China. I checked the geological time scale, the Jurassic was between 201.3 mya and 152.1 mya and Cretaceous began 145 mya. How to explain this？
The enclosed photographs are from Upper Jurassic - Lower Cretaceous fluvial succession of Gondwana. I am of the opinion of their origin through biogenic activities, however, not very sure. The preservation of the structures is in light to dark gray clayey horizons having abundant leaf impressions of Pteridophytic to Gymnospermus remains. The clay units occur as interbedded horizons with siltstone or, lenicular/poketed occurrence in medium grained sandstone