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Showing results for tags 'triassic'.
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From the album: Fossildude's Late Triassic Lockatong Formation Fossils
Skull of Diplurus newarki coelacanth. Late Triassic, Newark Supergroup, Newark Basin, Lockatong Formation North Bergen, NJ. "Granton Quarry"© 2017 Tim Jones
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From the album: Fossildude's Late Triassic Lockatong Formation Fossils
Caudal fin of Diplurus newarki coelacanth. Late Triassic, Newark Supergroup, Newark Basin, Lockatong Formation North Bergen, NJ. "Granton Quarry"© 2017 Tim Jones
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After Earth’s Worst Mass Extinction, Life Rebounded Rapidly
Oxytropidoceras posted a topic in Fossil News
After Earth’s Worst Mass Extinction, Life Rebounded Rapidly, Fossils Suggest, Trilobites, Nichlos ST. Fleur, New york times, Feb. 16, 2017 https://www.nytimes.com/2017/02/16/science/great-dying-permian-extinction-fossils.html New fossil discovery suggests sea life bounced back after the 'Great Dying' faster than thought, PhysOrg, February 16, 2017 https://phys.org/news/2017-02-fossil-discovery-sea-life-great.html The paper is: Brayard, A., Krumenacker, L.J., Botting, J.P., Jenks, J.F., Bylund, K.G., Fara, E., Vennin, E., Olivier, N., Goudemand, N., Saucède, T. and Charbonnier, S., 2017. Unexpected Early Triassic marine ecosystem and the rise of the Modern evolutionary fauna. Science Advances, 3(2), p.e1602159. http://advances.sciencemag.org/content/3/2/e1602159 Yours, Paul H. -
Calcite mold.
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Calcite mold.
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Calcite Steinkern.
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Calcite Steinkern.
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Dinocephalosaurus gave live birth? http://www.csmonitor.com/Science/2017/0214/Surprise!-This-ancient-reptile-gave-birth-to-live-young-instead-of-laying-eggs
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Calcite mold.
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Calcite mold.
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With preserved shell.
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From the album: Invertebrates
Palaeodusa longipes Pinna, 1974 Upper Triassic Norian Forni Dolostones Preone Italy Not sure if Palaeodusa or Dusa -
Luoxiongichthys hyperdorsalis Wen et al., 2011
oilshale posted a gallery image in Member Collections
From the album: Vertebrates
Luoxiongichthys hyperdorsalis Wen et al., 2011 Middle Triassic Anisian, Pelsonian Guanling Formation Daaozi, Luoxiong Luoping County Yunnan China Lit.: W. Wen, Q. Y. Zhang, C. Y. Zhou, J. Y. Huang, Z. Q. Chen and M. J. Benton. 2012. A new genus of basal actinopterygian fish from the Anisian (Middle Triassic) of Luoping, Yunnan Province, Southwest China. Acta Palaeontologica Polonica 57:149-160 -
Fossils and especially fishes in the Upper Bunter Formation in Germany are quite rare. But occasionally you can find fish gatherings. In the mid '60ties, almost 60 of these Pericentrophorus minimus were found together with nearly 200 of these strange looking Dipteronotus aculeatus (JÖRG, 1969) in a small clay lens, just 10m in diameter and 30cm thick. Diagnosis from Jörg, 1969, p. 94 (translated from german by oilshale): "Body low spindle-shaped, with almost straight dorsum. Dorsal line slightly depressed below dorsalis. Fin position as in genus Acentrophorus TRAQUAIR. Maxillary shortened, but still extending far back under orbit almost to its posterior margin. Teeth pencil-shaped, small, parietalia proportionally long. Opercular apparatus well developed, with narrow, strongly curved and below somewhat anteriorly curved praeoperculum. Caudalis almost symmetrical, weakly indented. Along dorsum runs a row of short, bluntly domed ridge scales, posterior margins concave. Anterior flank scales twice as high as wide. Scaling of upper caudal lobe reduced posteriorly to a single row of scales covering lobe about half its length." Line drawing from Jörg 1969, p. 96: Identified by oilshale using Jörg 1969. References: Jörg, E. (1969) Fischfunde im Oberen Buntsandstein (Untertrias) von Karlsruhe-Durlach. Zeitschrift der Deutschen Geologischen Gesellschaft Band 121 (1969), p. 105 - 110. Jörg, E. (1969): Eine Fischfauna aus dem Oberen Buntsandstein Unter-Trias von Karlsruhe-Durlach Norbaden. Beitraege zur Naturkundlichen Forschung in Suedwestdeutschland, 28: 87-102. Gall, JC.; Grauvogel, L.; Lehman, JP.(1974): Faune du Buntsandstein. 5. Les poissons fossiles de la collection Grauvogel - Gall. Annales Paleont (Vert): 602: 127-168
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This fish was first described under the name Praesemionotus aculeatus JÖRG, 1969 Taxonomy from Fossilworks.org. Diagnosis for the genus from Tintori 1990, p. 194: "Small high-bodied fish with the dorsal crest made up by ll ridge scales; maximum height of the body (crest excluded) equal to 54% of the s.l.: head length equal to 36% of s.l.; dorsal fin consisting of 22 lepidotrichia, caudal of 26 (at least 6 of which are epaxial) and anal of 15 lepidotrichia; trunk scales with a backward directed spine at the center of their posterior edge." Reconstruction of D. olgiatii TINTORI, 1990 Identified by oilshale using Jörg 1969. References: Jörg, E. (1969) Fischfunde im Oberen Buntsandstein (Untertrias) von Karlsruhe-Durlach. Zeitschrift der Deutschen Geologischen Gesellschaft Band 121 (1969), p. 105 - 110. Jörg, E. (1969): Eine Fischfauna aus dem Oberen Buntsandstein Unter-Trias von Karlsruhe-Durlach Norbaden. Beitraege zur Naturkundlichen Forschung in Suedwestdeutschland, 28: 87-102 Gall, JC.; Grauvogel, L.; Lehman, JP.(1974): Faune du Buntsandstein. 5. Les poissons fossiles de la collection Grauvogel - Gall. Annales Paleont (Vert): 602: 127-168 Tintori, A. (1990): DIPTERONOTUS OLGIATII N. SP. (ACTINOPTERYGII, PERLEIDIFORMES) FROM THE KALKSCHIEFERZONE OF CA' DEL FRATE (N. ITALY) (Preliminary note). Atti. Tic. Sc. Terra, 33 (1990), 191-197,2figg., 1 pl.
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From the album: Vertebrates
Gymnoichthys inopinatus Tintori et al., 2010 Middle Triassic Anisian Guangling Formation, Daaozi, Luoping, Yunnan PRC Length 10cm / 4" Re-study on Gymnoichthys inopinatus from Middle Triassic of Luoping Yunnan China.pdf A new basal neopterygian from the middle triassic of Luoping gymnoichthys.pdf -
From the album: Vertebrates
Mixosaurus panxianensis Jiang et al., 2006 Middle Triassic Guanling Formation Anisian Panxian Guizhou PRC Length 50cm / 20" Lit.: DA-YONG JIANG, LARS SCHMITZ, WEI-CHENG HAO1,and YUAN-LIN SUN (2006): A NEW MIXOSAURID ICHTHYOSAUR FROM THE MIDDLE TRIASSIC OF CHINA. Journal of Vertebrate Paleontology 26(1):60–69, March 2006 -
Here are two plates from Guizhou province. They should be Protrachyceras sp. ammonites from late Triassic. First one: Second front: Second back:
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From the album: Vertebrates
Habroichthys minimus Brough, 1939 Middle Triassic Ladinian Davos Switzerland -
References: Gorjanović-Kramberger, K. (1905): Die obertriadische Fischfauna von Hallein in Salzburg. Beitr. Paläont. Geol. Österr.-Ungarns u. d. Orients, VIII, pp 193-224, Taf. 17-21
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Taxonomy from Kogan & Romano 2016. Diagnosis from Kogan & Romano 2016, p. (e1151886-5): "Medium-sized saurichththyid (sensu Tintori, 2013) of at least 60 cm total length (MNHN.F MAE 2524, FG 1/2013, PIMUZ A/I 4144); extensive scale cover with high mid-lateral scales, broad mid-dorsal and mid-ventral scales, and numerous smaller rhombic scales present in dorsolateral and ventrolateral positions; one ventrolateral row of specialized, enlarged scales that are shaped like a tilted ‘L’; all fins with fringing fulcra of Pattern C (sensu Arratia, 2009), and with segmented, distally branched lepidotrichia; operculum long and subtriangular; antoperculum present; one pair of branchiostegal rays; suborbital bone developed; circumorbital series including a well-developed supraorbital, a dermosphenotic, and at least one posterior infraorbital bone; surangular very narrow and anteriorly reaching the level of the center of the orbit; elongate postorbital portion of the cranium, skull (including operculum) measuring about 27% of the total body length." References: Pivetau, J. (1944-45): Paléontologie de Madagascar, XXV. Les poissons du Trias inférieur. La famille des Saurichthyidés. Ann. Paléont., 31: 79-87. Rieppel, O. (1980): Additional specimens of Saurichthys madagascariensis from the Eotrias of Madagascar. N.Jb. Geol. Paläont. Mh., 1980 (1): 43-51. Beltan, L. (1996): Overview of systematics, paleobiology and paleoecology of Triassic fishes of northwestern Madagascar. In: Mesozoic Fishes - Systematics and Paleoecology, 1996, pp. 479-500. ISBN3-923871-90-2. Kogan, I. und Romano, C. (2016): Redescription of Saurichthys madagascariensis Piveteau, 1945 (Actinopterygii, Early Triassic), with implications for the early saurichthyid morphotype. Journal of Vertebrate Paleontology. Vol. 36, Iss. 4, 2016 DOI: 10.1080/02724634.2016.1151886
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- madagascar
- sakamena formation
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From the album: Vertebrates
Saurichthys madagascariensis Piveteau, 1945 Early Triassic Dienerian Sakamena Formation Anktokazo Madagascar Length 60cm Lit.: Pivetau, J. (1944-45): Paléontologie de Madagascar, XXV. Les poissons du Trias inférieur. La famille des Saurichthyidés. Ann. Paléont., 31: 79-87; Paris Rieppel, O. (1980): Additional specimens of Saurichthys madagascariensis from the Eotrias of Madagascar. N.Jb. Geol. Paläont. Mh., 1980 (1): 43-51; Stuttgart Kogan, I. und Romano, C. (2016): Redescription of Saurichthys madagascariensis Piveteau, 1945 (Actinopterygii, Early Triassic), with implications for the early saurichthyid morphotype. Journal of Vertebrate Paleontology. Vol. 36, Iss. 4, 2016 DOI: 10.1080/02724634.2016.1151886 -
Paralepidotus ornatus is a rather common semionotid in most Norian marine localities of Europe, ranging from a few centimeters up to 50cm in standard length. Specimens of Paralepidotus have been recorded from other localities and have often been described under new specific names such as Lepidotes fimbriatus, L. parvulus, L. latus, Heterolepidotus dorsalis, Colobodus elongatus… Juveniles are more slender than adults and their dentition is not like the powerful crushing one of large species. This implies a change in environment during the live of an individual Paralepidotus from superficial open waters to shallow mollusc banks. A change in diet is also implied by the change in dentition. It is thought that juvenile Paralepidotus lived on crustaceans whereas adult Paralepidotus had a strictly durophagous dentition and fed exclusively on molluscs. The slender body of young Paralepidotus suggests that they lived quite far from the bottom and were rather fast swimmers. Adult Paralepidotus were probably shell eaters, slowly swimming just above the bottom. References: Tintori, A. Paralepidotus ornatus (Agassiz 1833-43) a Semionotid from the Norian of Europe. Mesozoic Fishes – Systematics and Paleocology, G. Arratia & G.Viohl (eds.):pp167-179. Gorjanović-Kramberger, K. (1905): Die obertriadische Fischfauna von Hallein in Salzburg. Beitr. Paläont. Geol. Österr.-Ungarns u. d. Orients, VIII, pp 193-224, Taf. 17-21
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Taxonomy from Lehman 1952. Genus Diagnosis from White 1933, p. 118: "Palæoniscidæ with fusiform bodies, long heads, and large orbits anteriorly placed. Gape wide and suspensorium very oblique. Frontals long with extreme irregular media] and digitate parietal sutures; parietals well developed with short triradiate sensory grooves and produced forwards into conspicuous median “ processes.” Preoperculum bent almost at fight-angles, with upper horizontal limb long and roughly triangular, but truncated by supratemporal margin: long wedge shaped bone “ Y ” in excavated antero—superior margin of operculum. Supratemporal large with anterior arm dividing strap-like intertemporal from frontal; four or five postorbital bones present. Teeth on outer margins of maxilla and dentary numerous, minute and sharply pointed. Fin—raye fine and very numerous, articulated dîstally in pectorals, but throughout in other fins; all distanty dichotomized; fulcra minute. Pectoral fins large, their length exceeding distance between their origin and that of ventralfins, which is somewhat nearer pectoral than anal fins; ventral and unpaired fins well developed, the triangular dorsal being posteriorly placed and somewhat anterior in position to similarly—shaped anal. Posterior half of caudal fin unknown. Scales small and numerous, deeplÿ overlapping, rhomboid in shape, their exposed surfaces covered with ganoine, obliquely ridged, and denticulated posteriorly." Species Diagnosis from White 1933, p. 120: "A Pteronisculus with fusiform body; maximum depth about equal to length of head with opercular apparatus, and rather less than one—third of total length to base of caudal fin. Length of pectoral fin somewhat less than distance between tip of snout and hinder margin of maxilla. Origin of dorsal fin above thirty—fourth scale—row from pectoral girdle approximately. Scales in about fifty—five vertical rows to base of caudal fin, and ornamented with oblique rugæ and a few finer rugæ running parallel to lower margin of scale on main flank—scales." Line drawing of the head from White 1933, p. 119: Line drawing from Lehman 1952, p. 69. References: White E. I. (1933) New Triassic Palaeoniscids from Madagascar. The Annals and Magazine of Natural History, Tenth Series 10:118-128. Lehman. J.-P. (1952) Etude complémentaire des poissons de l'Eotrias de Madagascar. Kungliga Svenska Vetenskapsakademiens Handlingar 2:1-201.
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Dear members of The Fossil Forum, I am busy on the identification of all the fossils in my collection, but some fossils are causing trouble, one of which I will show here. It is 23mm. The name tag says it is an Arctohungarites sp. but in my opinion the umbilicus is too big for Arctohungarites. It looks more like Nordophiceras but I do not know if the fastigate venter is common for that genus. It might very well be neither of these genuses, my knowledge on Siberian ceratites is very limited. The findspot is Northern Siberia, but where exactly is not stated. I know of two sites, Cape Tsvetsov and the Olenek river, does the preservation of this ammonite point at one of these two? The age of the ceratite is said to be Middle Triassic, which means Anisian-Ladinian, although most of the siberian triassic ammonites are Olenekian in age. Apparently Arctohungarites is an Anisian genus, but I am not sure that this ammonite is an Arctohungarites. So my questions are: What Genus and species is this ceratite? Where does it come from? What age is it? Is there anyone who can shed light onto this ceratite and help me? Thanks in advance, Sander
