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Found 3 results

  1. 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
  2. oilshale

    Ophiopsiella procera (Agassiz, 1843)

    The genus previously known as Ophiopsis Agassiz, 1834 (except Ophiopsis muensteri Agassiz, 1834), was reassigned by Lane & Ebert 2015 to Ophiopsiella. Taxonomy from Lane & Ebert 2015. Lane & Ebert 2015, p. e883238-4 :”Diagnosis—The genus Ophiopsiella is characterized by the following unique combination of features: medium-sized halecomorph fishes with body depth increased anteriorly to form a low hump and tapering posteriorly; parietals equal in length to dermopterotics; antorbitals do not reach the orbit; lacrimal large and deep; *low number of suborbitals with ventral-most suborbital represented by a single large bone (rather than numerous small bones); rostral with lateral horns; posterior infraorbital inclined posterodorsally; preopercle reaches dorsal border of opercle; subopercular with anterior dorsal extension; dermopterotic deep posteriorly and tapering anteriorly; single, undivided dorsal fin; vertebrae lacking posterior fossae; scales have posterior serrations; dorsal fin elongate, occupying over one-third of the dorsal body length, tapering posteriorly; caudal fin forked; *17–19 caudal fin rays; main lateral line continuing into a row of small ossicles between the seventh and eighth caudal fin rays; scales thick, rhomboidal, not deeper than broad; pelvic fins opposite the midpoint of the dorsal fin; *high number (14C) of caudal peduncle scales; posterior border of dorsal fin opposite anal fin; robust maxilla with a shallow posterior notch; lateral line pores located within scale borders (not forming a posterior notch); and basal and fringing fulcra present on both dorsal and ventral lobes of caudal fin.” Lane & Ebert 2015, p. e883238-4: “Emended Species Diagnosis—Ophiopsiella with *44 vertical scale rows from postcleithra to hinge line; 24–25 dorsal fin rays; 18–19 principal caudal fin rays; *anteriormost four dorsal fin rays extremely elongated compared with subsequent rays, forming a crescent-shaped concave curve posteriorly; *caudal fin deeply forked posteriorly; posttemporal, extrascapular, and postcleithra serrated posteriorly; anterodorsal body scales serrated along their entire posterior border; prominent predorsal hump with maximum body depth at dorsal fin origin. Pterygial formula: " References: Agassiz, L. 1834. Abgerissene Bemerkungen über fossile Fische. pp. 379–390 in: von Leonhard, K. C. & Bronn, H. G. (eds.): Neues Jahrbuch für Mineralogie, Geognosie, Geologie und Petrefaktenkunde, 1834 (4). E. Schweitzbarts Verlagsbuchhandlung, Stuttgart. Lane, J. A. & Ebert, M., 2015: A taxonomic reassessment of Ophiopsis (Halecomorphi, Ionoscopiformes), with a revision of Upper Jurassic species from the Solnhofen Archipelago, and a new genus of Ophiopsidae. Journal of Vertebrate Paleontology, 35 (1): e883238. doi: 10.1080/02724634.2014.883238
  3. The first pereiopod is strongly elongated, was used to catch prey, and was more calcified than the rest of the body. Mecochirus was probably a bottom-dwelling reef inhabitant. On the plate are also several specimens of the swimming crinoid Saccocoma tenella GOLDFUSS, 1831. Line drawing: References: C. E. Schweitzer, R. M. Feldmann, A. Garassino, H. Karasawa, and G. Schweigert. 2010. Systematic list of fossil decapod crustacean species. Crustaceana Monographs 10:1-222
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