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Showing fossils posted in for the last 365 days.
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Taxonomy from Wang et al., 2016. Amended diagnosis from Wang et al., 2016, p. 73; "Head massive, circular or cube-like; mandibles curved, strong and sickle-like; pronotum short and wide; the first antennal flagellomere equal to head in length, but eight times as long as the second flagellomere; forewing pterostigma variable, completely sclerotized or partly sclerotized, or just membranous; M diverging from M+Cu at much larger angle than Cu; 1-RS proclival or somewhat vertical; angle between 1-M and RS+M almost 90°; 1cu-a distal to the middle of cell 1mcu or located at middle; 2r-rs almost in line with 2r-m; hind wing with 1r-m rather long, as long as or slightly shorter than 1-M." Line drawing from Wang et al. 2016, p. 77: References: Wang C, Shih C, Rasnitsyn AP, Wang M. (2016) Two new species of Prolyda from the Middle Jurassic of China (Hymenoptera, Pamphilioidea). Zookeys. 2016 Feb 26;(569):71-80. doi: 10.3897/zookeys.569.7249. PMID: 27110151; PMCID: PMC4829680.
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- daohugou
- jiulongshan
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From Peng et al. 2015, p. 2: "The systematics of Mesozoic psychopsoids is very complicated and confused. This group of Neuroptera includes taxa with broad and multi-veined wings that are currently classified in five families, i.e. Osmylopsychopidae, Brongniartiellidae, Psychopsidae, Kalligrammatidae and Aetheogrammatidae (Makarkin et al. 2013). Kalligrammatidae and Aetheogrammatidae are easily distinguished from other psychopsoids, whereas the Mesozoic members of the three other families (i.e. Osmylopsychopidae, Brongniartiellidae and Psychopsidae) hardly differ from each other.". Determined in Mai 2023 by Dr. Vladimir N. Makarkin, Institute of Biology and Soil Sciences, Far Eastern Branch of the Russian Academy of Sciences, Vladivostok, Russia: "This is a species of Osmylopsychopidae, possibly new." References: Makarkin, V. N., Yang, Q., Shi, C. F. & Ren, D. (2013). The presence of the recurrent veinlet in the Middle Jurassic Nymphidae (Neuroptera) from China: a unique condition in Myrmeleontoidea. ZooKeys, 325, 120. Peng, Y., Makarkin, V. N. and Ren, D. (2015). Diverse new Middle Jurassic Osmylopsychopidae (Neuroptera) from China shed light on the classification of psychopsoids. Journal of Systematic Palaeontology, p. 1-35. http://dx.doi.org/10.1080/14772019.2015.1042080
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Liopleurodon ferox tooth Oxford Clay, Orton Brick Pit, Peterborough, UK Identified by Dr Adam S. Smith (Author of The Plesiosaur Directory) as belonging to Liopleurodon ferox due to the distribution, length, spacing of the ridges which is typical for the species
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Barracudasauroides panxianensis (Jiang Schmitz Hao & Sun, 2006)
oilshale posted a fossil in Amphibians & Reptiles
Taxonomy from Fossilworks.org Originally described as Mixosaurus panxianensis, Maisch 2010, p. 162 "proposed the name Barracudasauroides n. gen., with the type species Barracudasauroides panxianensis (JIANG et al. 2006) n. comb.” Diagnosis from Maisch 2010, p. 161: "Small mixosaurids, skull length below 250 mm, crista sagittalis low, 15 or less premaxillary teeth with elongate, conical and pointed crowns, maxillary teeth stronger than premaxillary teeth, anterior maxillary teeth robust, conical and blunt, posterior maxillary teeth slightly elongated mesiodistally, jugal with short processus posteroventralis, no external contact between jugal and quadratojugal, postorbital and possibly squamosal reach incisura postjugalis, postorbital seperates postfrontal and supratemporal, radius with two anterior notches (modified from JIANG et al. 2005, 2006).” References: D.-Y. Jiang, L. Schmitz, and W.-C. Hao, Y.-L. sun. 2006. A new mixosaurid ichthyosaur from the Middle Triassic of China. Journal of Vertebrate Paleontology 26(1):60-69. M. W. Maisch. 2010. Phylogeny, systematics, and origin of the Ichthyosauria - the state of the art. Palaeodiversity 3:151-214.-
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- barracudasauroides
- guanling formation
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Taxonomy from Fossilworks.org. From Wen et. al. 2019, p. 4: "Emended diagnosis (Bürgin, 1992, 1996; Neuman & Mutter, 2005). – Small to large-sized (52–600 mm in total length) actinopterygians. Elongate fusiform body with a deeply forked, equilobate and hemi-heterocercal caudal fin. Dorsal and anal fins segmented entirely. Head characterized by a large and broad preoperculum and a maxilla with a long and narrow posterior plate. Dermohyal present. The terminal axial scale lobe reaches over half of the upper caudal fin lobe length. No epaxial rays. Fin rays branch distally. Fringing fulcra on the surfaces of marginal fin rays. Scales with smooth surfaces and serrated posterior border." Line drawing from Wen et al. 2019, p. 9: References: Bürgin, T. (1992). Basal ray-finned fishes (Osteichthyes; Actinopterygii) from the Middle Triassic of Monte San Giorgio (Canton Tessin, Switzerland). Schweizerische Paläontologische Abhandlungen 114, 1–164. Bürgin, T. (1996). Diversity in the feeding apparatus of perleidid fishes (Actinopterygii) from the Middle Triassic of Monte San Giorgio (Switzerland). In Mesozoic Fishes – Systematics and Paleoecology (eds G. Arratia & G. Viohl), pp. 555–65. Munich: Pfeil. Mutter, R. J. (2005). Re-assessment of the genus Helmolepis Stensiö 1932 (Actinopterygii: Platysiagidae) and the evolution of platysiagids in the Early-Middle Triassic. Eclogae Geologicae Helvetiae 98, 271–80. WEN W, HU SX, ZHANG QY, et al. (2019). A new species of Platysiagum from the Luoping Biota (Anisian, Middle Triassic, Yunnan, South China) reveals the relationship between Platysiagidae and Neopterygii. Geological Magazine. 156(4):669-682.
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- china
- guanling formation
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I agree; a very pretty fishy.
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Only freshwater member! I've prepared adults from the green River deposit, and plan to do illustrations of what living specimens may have looked like in the day. Also Mioplosis, Knightia, Phareodus, Diplomystus, and Priscacara.
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Cute little bugger RB
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Taxonomy from Fossilworks.org Identified as juvenile Mesturus verrucosus by M. Ebert, Department of Earth and Environmental Sciences, Paleontology and Geobiology, Ludwig-Maximilians-Universität München. References: Wagner A. (1862): Monographie der fossilen Fische aus den lithographischen Schiefern Bayerns.– Erste Abtheilung: Plakoiden und Pyknodonten.– Abhandlungen der königlich bayerischen Akademie der Wissenschaften, mathematisch-physikalische Classe, 9(2): 279–352 + 4 plates. Nursall, J. R. (1999) . The family †Mesturidae and the skull of pycnodont fishes. In G. Arratia & H.-P. Schultze (eds.)Mesozoic Fishes 2 – Systematics and Fossil Record: pp. 153-188, 23 figs., 2 tabs. © 1999 by Verlag Dr. Friedrich Pfeil, München, Germany – ISBN 3-931516–48-2
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Beautiful specimen!
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Taxonomy from Romano et al., 2019. 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 C. Romano, A. López-Arbarello, D. Ware, J. F. Jenks, and W. Brinkmann (2019). Marine Early Triassic Actinopterygii from the Candelaria Hills (Esmeralda County, Nevada, USA). Journal of Paleontology 93:971-1000
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- dienerian
- madagascar
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Thank you @sixgill pete!
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Beautiful example!
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References: Gale, B., Gale, P., & Gale, A. (2020). A Beachcomber's Guide to Fossils. University of Georgia Press. Miller, A., Gibson, M., & Boessenecker, R. (2021). A megatoothed shark (Carcharocles angustidens) nursery in the Oligocene Charleston Embayment, South Carolina, USA. Palaeontologia Electronica, 24(2), 1-19.
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Thanks for sharing. I recently acquired similar plate for my collection from Marroc. Kataoua formation
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Thank you, this is one of my favorite fish in my collection.
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Thats one dang cool fish! RB
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Wow! Don
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Taxonomy from Klug & Kriwet, 2012. Alternative name: Squatina alifera References: Münster, G.G. (1842) Beschreibungen einiger neuen Fische in den lithographischen Schiefern von Bayern. Beiträge zur Petrefactenkunde, 5, 55–64. Underwood, C. J. (2002): Sharks, rays and a chimaeroid from the Kimmeridgian (Late Jurassic) of Ringstead, southern England. – Palaeontology, 45 (2): 297–325. Carvalho, Kriwet & Thies (2008): A systematic and anatomical revision of Late Jurassic angelsharks (Chondrichthyes: Squatinidae). Thies, D. & Leidner, A. (2011): Sharks and guitarfishes (Elasmobranchii) from the Late Jurassic of Europe. Palaeodiversity 4: 63–184; Stuttgart. Klug, S. and Kriwet, J. (2013): An offshore fish assemblage (Elasmobranchii, Actinopterygii) from the Late Jurassic of NE Spain. Palaeontologische Zeitschrift 87(2):235-257.
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- angel shark
- eichstaett
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Juvenile Priscacara can be easily distinguished from juvenile Hypsacantha by their distinctly rounder body shape. Grande distinguishes two forms of Hypsiprisca: Hypsiprisca hypsacantha (originally described by Cope in 1886 under the name Priscacara hypsacantha) and a second yet undescribed, closely related form Hypsiprisca sp. H. sp. is more common than H. hypsacantha: H. sp. are mostly very small individuals less than 60mm long. Quotation L. Grande (2013): "The second species that remains undescribed differs from H. hypsacantha in being more slender-bodied and having a more convex posterior tail fin margin (H. hypsacantha has a very slightly forked tail margin)." References: Whitlock, J. (2010). Phylogenetic relationships of the Eocene percomorph fishes †Priscacara and †Mioplosus Journal of Vertebrate Paleontology Volume 30 – Issue 4, pages 1037-1048. Grande, L. T. (2013). The Lost World of Fossil Lake: Snapshots from Deep Time. University of Chicago Press. ISBN: 13: 978-0-226-92296-6.
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- eocene
- green river fm
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A juvenile Prisacara serrata (the length is about 2.5 cm), but already showing the typical roundish body proportions of an adult Priscacara and differing from Hypsiprisca sp. Distinguishing characters for Priscacara serrata and Cockerellites liops (old name Priscacara liops): References: Cope. E. D. (1877). A contribution to the knowledge of the ichthyological fauna of the Green River shales. Bulletin of the United States Geological and Geographical Survey 3(4):807-819 WHITLOCK, J. A. (2010). PHYLOGENETIC RELATIONSHIPS OF THE EOCENE PERCOMORPH FISHES †PRISCACARA AND †MIOPLOSUS. Journal of Vertebrate Paleontology, 30(4), 1037–1048. http://www.jstor.org/stable/40864383. Grande, L. T (2013) The Lost World of Fossil Lake: Snapshots from Deep Time. University of Chicago Press. ISBN: 13: 978-0-226-92296-6.
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- eocene
- green river fm
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Taxonomy from Fossilworks.com. Diagnosis from Liu, Y.s., Sinitshenkova, N.D. & Ren, D., 2009, p. 185: "Adults. Medium-sized stoneflies. Head large, antennae long, prothorax narrow. Wings at rest extending considerably beyond apex of abdomen. In forewings, c–r absent; Rs bifurcating, usually forked at level of Sc apex. M branching slightly distad of Rs fork; m–cu always connecting base of MP with CuA. Crossveins between M and CuA and between CuA and CuP numerous. CuP straight, entering wing margin approximately at level of M fork. Hindwings with four longitudinal veins in anal area. Legs long and thin. First tarsomere long, almost twice as long as second; second tarsomere shorter than third. Cerci short, single-segmented." Line drawing from Liu et al. 2009, p. 189: References: N. D. Sinitshenkova. (1987). Istopicheskoe razvitie vesiyanok. Akademiya Nauk SSSR, Trudy Paleontologicheskogo Instituta 221:1-142. Liu, Y.s., Sinitshenkova, N.D. & Ren, D. (2009). A revision of the Jurassic Stonefly Genera Dobbertiniopteryx Ansorge and Karanemoura Sinitshenkova (Insecta: Plecoptera), with the description of new species from the Daohugou locality, China. Paleontol. J. 43, 183–190. https://doi.org/10.1134/S0031030109020099
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- daohugou
- haifanggou formation
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Incredible fish! Don
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very cool
