Search the Community
Showing results for tags 'triassic'.
-
Hi Is this footprint fossil?
-
Hi Is this footprint?
-
Hi Is this footprint fossil?
-
My new Keichousaurus, a half grown one to go with my baby one. Thanks for the advice, everyone who helped me with this purchase! The bones are 3d, it's not a bad prep job I think.
-
In his 1933 paper, White described two new Pteroniscoids from Madagascar: Pteronisculus cicatrosus , which is rather common and the somewhat rarer Pteronisculus macropterus. Diagnosis from White 1933, p. 126: "Pteronisculus with elongate-fusiform body; maximum depth rather less than length of head with opercular apparatus, and equal to one—quarter total length to base of caudal fin. Length of pectoral fin exceeding distance between tip of snout and hinder margin of maxilla. Origin of dorsal fin above fortieth scale—row from pectoral girdle approximately. Scales in more than seventy vertical rows to base of caudal fin, and ornamented with oblique rugæ only." Sketch from White 1933, p. 126: References: White, E. I. (1933): New Triassic palaeoniscids from Madagascar. Ann. a. Mag. Nat. Hist.(10) 11: 118-128; London
- 5 comments
-
- 2
-
-
- ambodipo
- macropterus
- (and 5 more)
-
From the album: Vertebrates
Mixosaurus panxianensis Jiang et al., 2006 Middle Triassic Panxian Guizhou PR China -
.thumb.JPG.d64a00de120fb553baacff5149461632.JPG)
Coelacanth from the Old Granton Site, North Bergen, N.J.
Jeffrey P posted a gallery image in Member Collections
.JPG.03dbb946fd632e32e20962c97ce25dcf.JPG)
From the album: Triassic
Diplurus newarki (coelacanth missing some fins) Upper Triassic Lockatong Formation Newark Supergroup Granton site North Bergen, N.J. Prepared with great effort and skill by Kris (Psychodus04) Than you. -
Taxonomy from Mindat.org. Diagnosis for the species by Tintori et al. 2010, p. 164: "Medium size, almost naked basal neopterygians with high fusiform body. Postero-ventral infraorbital much larger than the others; no suborbitals. Ventral surface of the parasphenoid and median surface of palatal bones totally covered by small teeth. Skull dermal bones with a ridged external surface, but with scarce ganoine covering. Vertebral column with no ossified or calcified centra. Autogeneous neural spines showing an enlarged leaf-like proximal end articulated to the corresponding enlarged distal area of paired neural arches. Short neural arches fused to the neural spines beginning from the end of the dorsal fin. Ossified ribs present, followed by haemal arches with a median spine at level of the insertion of the anal fin, Squamation constituted only by very small scales, arranged in a discontinuous row along the lateral line and in a single urodermal row on the dorsal body lobe of the hemiheterocercal tail. Last radial in both dorsal and anal fins supporting the last two or three lepidotricha. Median fins with very small scutes, several basal fulcra, very few and thin fringing fulcra. Size to at least 105 mm (S.L.); about 44 vertebral segments comprising the ural ones. All fins large and made by rather elongate lepidotrichia. Pectoral and pelvic fins made respectively by 13 and 8 lepidotrichia, dorsal and anal fin by 19 and 14 lepidotrichia. Caudal fin with 10 dorsal caudal fulcra, 3 dorsal unbranched, 17 segmented and branched, 3 ventral unbranched (at least two of them bearing few tiny fringing fulcra), 2-3 ventral caudal fulcra and 1-2 ventral scute. Dorsal body lobe with a single row of 12-13 urodermals, Cleithrum and postcleithrum ornamented by very low ridges with a dendritic pattern posteriorly directed." Line drawing from Tan & Jin 2013, p. 51: References: Tintori, A. et al. (2010): A NEW BASAL NEOPTERYGIAN FROM THE MIDDLE TRIASSIC OF LUOPING COUNTY (SOUTH CHINA). Rivista Italiana di Paleontologia Stratigrafia 2010, Vol. 116, No. 2, pp 162-171. Tan, K. und Jin, F. (2013): Re-study on Gymnoichthys inopinatus from Middle Triassic of Luoping, Yunnan, China. Vertebrata Palasiatica 2013, pp 1-8.
-
Hi Is it Fish or reptile skull? Location:Poland Age: Middle Triassic?
-
Hi It is nothosaurus vetebra ? Location:Poland Age :Middle Triassic?
-
References: Wade, Robert Thompson (1935) The Triassic fishes of Brookvale, New South Wales. British Museum, London. Whitehouse, J. (2016) Beacon Hill shale quarry, Sydney, New South Wales, Australia: Geologic insights into its strikingly preserved Triassic fossil assemblage.
-
Rauisuchians are some of my favorite prehistoric beasts, rather specific but I'm wondering if anyone on here on the forum has any material to show I'd love to see. So far I've been only able to obtain postosuchus teeth and recently begrudgingly missed out on some Batrachotomus kupferzellensis.
-
Baby Keichousaurus, ventral view. Functional Morphology and ontogeny of Keichousaurus hui Reptilia Sauropterygia.pdf References: Liao JL, Lan T, Xu GH, Li J, Qin YJ, Zhao MS, Li YL and Wang Y (2021) Tooth Structure and Replacement of the Triassic Keichousaurus (Sauropterygia, Reptilia) From South China. Front. Ecol. Evol. 9:741851. doi: 10.3389/fevo.2021.741851
-
From the album: Vertebrates
Australosomus merlei Piveteau, 1934 Lower Triassic Dienerian Sakamena Formation Ambilobe Madagascar Small to medium size fish (~ 10 to 15cm / 4 to 6"), fusiform body, relatively small head with a slightly rounded snout. Its dorsal fin is located in the posterior fourth of the body. Caudal fin divided with wide lobes. Scales on the flanks are noticeably stalk-shaped.- 1 comment
-
- 1
-
-
- ambilobe
- australosomus
- (and 3 more)
-
From the album: Vertebrates
Paracentrophorus madagascariensis Piveteau, 1940 together with scavenging conchostraca (possibly Euestheria truempyi Kozur Seidel, 1982) Lower Triassic Olenekian Ambilobe Madagascar Length 8cm / 3" Small fish (up to 15cm / 6") with a rounded body, somewhat thickset appearance. Dorsal fin attached to the posterior half of the body. Pectoral and anal fin relatively large. Anal fin starts behind end of dorsal fin in close proximity to caudal fin. Caudal fin moderately divided. Eyes remarkably large. Paracentrophorus can be easily mixed up with Parasemionotus Lit.: Piveteau, J. (1940): Paléontologie de Madagascar XXIV Nouvelles recherches sur les poisson du Trias inférieur. Ann. Paleont., 28: 69-88 -
this summer vacation i spend a day fossil hunting at lyme regis i found some ammonites and bellemnites but also 2 big pieces of rock and i'm going to prepare them for a school project the rock formation was blue lias can i have any advice for cleaning the fossils?
-
Taxonomy from Fossilworks.org. Due to its enormous pectoral fins, Icarealcyon malagasium was described by Beltan as a "poisson volant" - a "flying fish" - in the family Semionotidae (not related to what is now known as "flying fish" - these are Exocoetidae in the order Beloniformes). You would expect flying fish to be fast swimmers - the rather thickset appearance of Icarealcyon more likely hints to slow swimmers with relatively high maneuverability (comparable to Albertonia from British Columbia). Icarealcyon was described by Beltan on the basis of poor material - in all three specimens only the body without head was preserved. Icarealcyon is probably closely related to Albertonia, or possibly even a synonym. Line drawing from Beltan 1984, p. 78: References: L. Beltan. 1984. A propos d'un poisson volant biplan d l'Eotrias du NW de Madagascar: Icarealcyon malagasium Beltan. Annales de la Société Géologique du Nord 103:75-82
- 4 comments
-
- 2
-
-
- albertonia
- dienerian
- (and 6 more)
-
From the album: alpine triassic Ammonoids
Block with Syringoceras sp., Monophyllites simonyi, Arcestes sp., Megaphyllites sp. and several orthocone Nautiloids -
Hi fossils friends, Here are some of my last preparations : Lower Triassic Flemingites lidacensis (Welter 1922) - 19 cm
-
From the album: Vertebrates
Pteronisculus macropterus White, 1933 Lower Triassic Dienerian Ambodipo Madagascar Length 8cm / 3"-
- 2
-
-
- madagascar
- pteronisculus
- (and 1 more)
-
Hello, Does somebody here knows where I can obtain permian or triassic vertebra fossils (no fish, exept shark) and reptiles, amphibians.... I prefer good quality. Thanks Thijs
-
just finished a lower Carnian slab with two Nautiloids(probably Mojsvaroceras cf. perarmatus) Additionally a questionable bone fragment appeared during prep. (the second bone within 20 years of collecting in the Hallstatt limestone) Unfortunly I didn't take "before" pics because I didn't think that it turns out so well. Can anyone confirm that this is bone structure on the polished part? I think so, but I am not sure. The ammonoid on top is a Monophyllites simonyi. So the slab is of lower Carnian, Julian time. regards Andreas
-
Taxonomy according to Mindat.org Diagnosis from Liu et al. 2003, p 356: "Fishes of rather large in size and slenderly fusiform in shape. Maxillary and mandible of Palaeoniscid type. Gape very long , with acutely conical teeth on mouth borders. Ventral fin very small and placed between pectoral and anal fins. Dorsal and anal fins rather large , latter larger and longer than former, and rays very numerous. Origin of dorsal fin slightly in front of that of anal. Fulcra developed. Tail heterocercal. Caudal fin equilobate and strongly forked. Ganoid scales very small and rhombic. Transverse rows of scales on trunk very numerous in number. Scales on anterior trunk superficially smooth , with comb-shaped denticles on posterior margins; those on middle and posterior parts of trunk bearing superficially markably crowded striae rostrocaudally." Identified by oilshale using Liu et al 2003. References: Liu et al. (2003) NEW DISCOVERED FISHES FROM KEICHOUSAURUS BEARING HORIZON OF LATE TRIASSIC IN XINGYI OF GUIZHOU. Acta Palaeontologica Sinica , 42(3) :346 - 366.
-
Greetings from the Newark Basin and Beyond!
Jack_E_Bones_N_Stones posted a topic in Member Introductions
Hello Everyone, I am new to the forum and have been collecting fossils since I was nine years old (I am now in my mid-twenties). Throughout the years, I have collected many dinosaur footprints from here in New Jersey as well as: Southern NY, PA, and even CT from the Triassic and Jurassic exposures I have been to. When I'm not out digging or working, I also enjoy preparing fossils as well, having worked on Jurassic fish I've discovered, Green River Formation fish, White River mammals, Keichoisaurus Hui skeletons, as well as many others! Some of my fossils I have prepared have found their way into the collections of several forum members as well! I will add some photos of some of my fossils I have found and prepped in this thread for you all to check out. I look forward to being a part of this community and corresponding with you all! Thank you for having me! if any of you are on Facebook, feel free to check out mine and my wife's page, FossilTerra for some photos of our specimens, trips, etc. Cheers everyone! Jack -
Volcanic eruptions triggered dawn of the dinosaurs (Huge pulses of volcanic activity are likely to have played a key role in triggering the end Triassic mass extinction, which set the scene for the rise and age of the dinosaurs, new Oxford University research has found.) http://www.heritagedaily.com/2017/06/volcanic-eruptions-triggered-dawn-dinosaurs/115652 https://www.sciencedaily.com/releases/2017/06/170619151530.htm Dinosaurs got an evolutionary assist from huge volcanic eruptions by Mary Beth Griggs Popular Science http://www.popsci.com/volcanic-eruptions-dinosaur-evolution The paper is: Lawrence M. E. Percival, Micha Ruhl, Stephen P. Hesselbo, Hugh C. Jenkyns, Tamsin A. Mather, and essica H. Whiteside. Mercury evidence for pulsed volcanism during the end-Triassic mass extinction. PNAS, June 2017 DOI: 10.1073/pnas.1705378114 http://www.pnas.org/content/early/2017/06/13/1705378114 Yours, Paul H.
.thumb.JPG.d64a00de120fb553baacff5149461632.JPG)
.JPG.03dbb946fd632e32e20962c97ce25dcf.JPG)
