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  1. Last week
  2. Tidgy's Dad

    Mesturus verrucosus WAGNER, 1862

    I agree; a very pretty fishy.
  3. Earlier
  4. Stan Sweaney

    Notogoneus osculus Cope, 1885

    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.
  5. RJB

    Mesturus verrucosus WAGNER, 1862

    Cute little bugger RB
  6. oilshale

    Mesturus verrucosus WAGNER, 1862

    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
  7. oilshale

    Pteronisculus macropterus White, 1933

    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
  8. Fin Lover

    angustidens

    Thank you @sixgill pete!
  9. sixgill pete

    angustidens

    Beautiful example!
  10. Fin Lover

    angustidens

    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.
  11. vincentB

    Ascocystites drabowensis

    Thanks for sharing. I recently acquired similar plate for my collection from Marroc. Kataoua formation
  12. oilshale

    Pseudorhina alifera (Münster, 1842)

    Thank you, this is one of my favorite fish in my collection.
  13. 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.
  14. oilshale

    Hypsiprisca sp.

    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.
  15. oilshale

    Priscarara serrata Cope, 1877 juvenile

    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.
  16. 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
  17. oilshale

    Kyphosichthys grandei Wu & Xu, 2011

    Taxonomy from Fossilworks.com. Xu & Wu 2012, p. 112: "Etymology: The generic name is derived from kyphos (Greek), meaning bent and referring to its lumped back, and ichthys (Greek), meaning fish. The species name honors Lance Grande for his recent, valued contribution to the study of the Ginglymodi." Emended diagnosis from Sun & Ni, 2017, p. 3: "(Possible autapomorphies marked with *). Small- to medium-sized, deep-bodied ginglymodian with a remarkable hump between head and dorsal fin (juveniles much more rounded, without the hump). A short, broad, squarish rostral bone; the dorsalmost suborbital bone(s) separating preopercle from dermopterotic bone; two anterior infraorbital bones; seven infraorbital bones between antorbital and dermosphenotic bones; infraorbital bone at the posteroventral corner of the orbit enlarged posteriad, reaching the anterior margin of the preopercle and laterally covering the quadrate; a large splint-like quadratojugal lateral to the quadrate; a short maxilla with a deep supramaxillary notch; two pairs of extrascapular bones; a rounded median gular plate. A compound first pectoral ray fused with basal and fringing fulcra; dorsal and anal fins far posteriorly located, with the insertion of dorsal fin five/six scale rows behind that of the anal fin; presence of scale-like fin rays. A complete scale row bordering the posterior margin of the dorsal body lobe, lacking additional incomplete scale rows. Scales smooth on the surface except for the anterior flank scales which are ornamented with ganoine ridges; posterior margin of scales with spare serrations. Pterygial formula of (D20-21/P7-9A16C25)T29-30." Line drawing from Sun & Ni, 2017, p. 4: References: Xu & Wu, (2012). A deep-bodied ginglymodian fish from the Middle Triassic of eastern Yunnan Province, China, and the phylogeny of lower neopterygians. Chinese Science Bulletin, January 2012 Vol.57 No.1: 111-118. http://www.springerl...28/fulltext.pdf Sun, Z., & Ni, P. (2017). Revision of Kyphosichthys grandei Xu & Wu, 2012 from the Middle Triassic of Yunnan Province, South China: implications for phylogenetic interrelationships of ginglymodian fishes. Journal of Systematic Palaeontology, 16(1), 67–85. doi:10.1080/14772019.2016.1269049
  18. Paul1719

    Gyracanthus

    The scapulocoracoid and spine with it although a pectoral and probably from the same fish is not in it's life position. It would have been along the right side. See add info
  19. Paul1719

    Gyracanthus

    Couple more points: all the spines anterior is left, the pelvic spine is covered in annoying scales, (wasn't able to remove without wrecking it).
  20. Paul1719

    Gyracanthus

    Gyracanthus is a cartilagenous gnathostome possibly a stem or sister clade to the Chondrichthyans. Most common fossils found are the fin spines but scapulocoracoids are not uncommon. Fossils here are result of collecting over 8 years from 2013. diagnosis.—Medium-sized gyracanthid fish, maximum estimated body length approximately 1 meter. Maximum fin spine length estimated 375 mm. Ridge width constant at maturity, ridge width constant along insertion-exsertion boundary at maturity, interridge width equal to or less than ridge width. Cristate tubercles ≤2 mm height, ≤2mm width, 9-11/cm proximally on pectoral fin spines, 8/ cm proximally on pelvic fin spines, 15/cm proximally on dorsal fin spines where preserved. Major and minor axes on tubercle, apex oriented oblique to underlying ridge. Pectoral fin spine inserted approximately one-third the length of the fin spine, ridge width constant along insertion-exsertion boundary at maturity, maximum fin spine ridge chevron angle along leading edge 90°, ornamented ridge dorsal to posteromedial groove. Two types of pelvic fin spines, one narrower with extensive exserted area, one wider and more robust with extensive inserted area, both with inserted area extending greater than half the length of the spine. Pelvic fin spine ridges curved retrorse towards midline. Median fin spines approximately symmetrical, comparable to paired fin spines but smaller and straighter distinct anterior and posterior dorsal fin spines. Prepectoral ventral plate with more than 30 tubercle rows, largely subparallel, some bifurcating, curving to the middle only at the extrema, convergent towards the lateral edge; prepectoral ventral plate inserted area at least a third of the width of the plate.
  21. Taxonomy from Fossilworks.com. Alternative combination: Aspidosoma roemeri. Description from Südkamp, 2017, p. 134: "Encrinaster has many characteristics common with Euzonosoma. The differences are as follows. The elongated arms are strap-like, broadening distally until the disc edge and then tapering evenly as comparatively narrow arms to the arm tips. The interradial disc outline is convex to straight. The marginals are flat overlapping plates. The ambulacrals are more delicate, less rectangular than in Euzonosoma, and more sub-triangular in oral view." Identified by oilshale using Südkamp 2017. References: Schöndorf, F. (1910) Palaeozoische Seesterne Deutschlands. II. Die Aspidosomatiden des deutschen Unterdevon. Palaeontographica 57:1-63. Lehmann, W.M. (1957) Die Asterozoen in den Dachschiefern des rheinischen Unterdevons. Abhandlungen des Hessischen Landesamtes für Bodenforschung 21:1-160 Südkamp, W. (2017) Life in the Devonian. Identification book Hunsrück Slate fossils. Verlag Dr. Friedrich Pfeil. München 2017. ISBN978-3-89937-221-2.
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