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Showing results for tags 'tithonian'.
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References: Charbonnier S. & Garassino A. 2012. — The marine arthropods from the Solnhofen Lithographic Limestones (Late Jurassic, Germany) in the collections of the Muséum national d’Histoire naturelle, Paris. Geodiversitas 34 (4): 857-871. http://dx.doi.org/10.5252/g2012n4a8
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References: Arratia,G. (1997) Basal teleosts and teleostean phylogeny. Palaeo Ichthyologica, 7: 5–168
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From the album: Vertebrates
Leptolepides haertesi ARRATIA, 1997 Late Jurassic Tithonian Zandt Germany Length: 9cm -
Reference: Günter Schweigert (2002) Zwei neue Garnelen (Decapoda: Dendrobranchiata, Eukyphida) aus oberjurassischen Plattenkalken Süddeutschlands. Stuttgarter Beiträge zur Naturkunde, Serie B (Geologie und Paläontologie) Nr 323, pp 1-11
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A juvenile. Adults can get up to 20cm. References: Arratia, GF, "Anaethalion and similar teleosts (Actinopterygii, Pisces) from the Late Jurassic (Tithonian) of southern Germany and their relationships", Palaeontographica Abteilung A Palaeozoologie-Stratigraphie, vol. 200, issue 1-3, pp. 1–44
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Geocoma carinata (v. Münster in Goldfuss, 1833)
oilshale posted a gallery image in Member Collections
From the album: Invertebrates
Geocoma carinata (v. Münster in Goldfuss, 1833) Upper Jurassic Tithonian (Malm zeta) Zandt Germany Diameter 8cm / 3 inch -
Taxonomy from Maxwell et al. 2020. Identified by oilshale. References: Agassiz L. (1843) Recherches Sur Les Poissons Fossiles. Tome I (livr. 18). Imprimerie de Petitpierre, Neuchatel xxxii-188. Maxwell, E.E., Lambers, P.H., López-Arbarello, A., and Schweigert G. (2020) Re-evaluation of pachycormid fishes from the Late Jurassic of Southwestern Germany. Acta Palaeontologica Polonica 65 (3): 429–453.
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References: C. Haug, D. E. G. Briggs, D. G. Mikulic, J. Kluessendorf, and J. T. Haug (2014). The implications of a Silurian and other thylacocephalan crustaceans for the functional morphology and systematic affinities of the group. BMC Evolutionary Biology 14(159):1-15 [M. Clapham/M. Clapham] H. Polz (1989). Clausocaris nom. nov. pro Clausia Oppenheim 1888. Archaeopteryx 7:73 H. Polz (1993). Zur Metamerie von Clausocaris lithographica (Thylacocephala, ?Crustacea). Archaeopteryx. 11: 105-112. H. Polz (1992). Zur Lebensweise der Thylacocephala. Archaeopteryx. 10: 1-12.
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Amblysemius was clearly a predator as evidenced by its mouth full of sharp teeth. It was a notable fast swimmer. Together with its only sister genus Caturus, Amblysemius was a member of the extinct Halecomorpha family Caturidae. It appears that the halecomorph Liodesmus, known from Solnhofen only, is related to the Caturids, rather than the amiiforms, as has been usually surmised. Once a diverse major group of bony fishes, the Halecomorpha have only one surviving member, the bowfin (Amia calva) of eastern North America. Living bowfins are remarkably hardy since they have a swim bladder that opens into their esophagus so they can gulp air, and hence survive in water with low oxygen. Amblysemius was a primitive species of fish that thrived during the Jurassic Period but went extinct by the Lower Cretaceous Period. Amblysemius possessed ganoid scales that are more cycloid in nature and as a member of the holosteans a bony skeleton with a partially ossified vertebral column. The Caturidae are represented in the Solnhofen Formation by at least four species: Caturus furcatus Agassiz 1834 and Caturus giganteus Wagner, 1851. Caturus pachyurus Agassiz, 1833 and Caturus bellicianus Thiollière 1852 from Solnhofen, Germany and Cerin, France were transferred to the revived sister genus Amblysemius (now Amblysemius pachyurus and Amblysemius bellicianus). Compared to Caturus, Amblysemius is characterized by its more slender body outline, the bigger and more deeply forked caudal fin being heterocerc with the upper lobe clearly longer than the lower one and the strong dentition. Amblysemius has considerably smaller scales compared to Caturus. Maximum length is around 50cm; this specimen has only 30cm or 12". References: Paul Lambers (1994) The halecomorph fishes Caturus and Amblysemius in the lithographic limestone of Solnhofen (Tithonian), Bavaria. Geobios 27:91-99
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References: Muenster, G. (1839): Decapoda Macroura. Abbildung und Beschreibung der fossilen langschwänzigen Krebse in den Kalkschiefern von Bayern. – Beiträge zur Petrefactenkunde, 2: 1–88. Günter Schweigert & Alessandro Garassino (2004). "New genera and species of shrimps (Crustacea: Decapoda: Dendrobranchiata, Caridea) from the Upper Jurassic lithographic limestones of S Germany". Stuttgarter Beiträge zur Naturkunde Serie B 350: 33. 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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The Caturidae are represented in the Solnhofen Formation by at least four species: Caturus furcatus Agassiz 1834, Caturus giganteus Wagner, 1851, Caturus pachyurus Agassiz, 1833 (all from Solnhofen) and Caturus bellicianus Thiollière 1852 from Solnhofen, Germany and Cerin, France. The last two species were transferred to the revived sister genus Amblysemius (now Amblysemius pachyurus and Amblysemius bellicianus). C. furcatus was clearly a predator as evidenced by its mouth full of sharp teeth. It was a notable fast swimmer possessing an elongated, somewhat thickset body with slender head. Together with its only sister genus Amblysemius, Caturus was a member of the extinct Halecomorpha family Caturidae. It appears that the halecomorph Liodesmus, known from Solnhofen only, is related to the Caturids, rather than the Amiiforms, as has been usually surmised. Caturus possessed ganoid scales that are more cycloid in nature and as a member of the holosteans a bony skeleton with a partially ossified vertebral column. The head is short an equipped with powerfully toothed jaws. The dorsal fin is pointed and attached just posterior to the body's midpoint. anal fin is attached somewhat more to the rear. The caudal fin is large and deeply divided. Juvenile species.
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Field collection
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Taxonomy from Fossilworks.com. Diagnosis from Poyato-Ariza & Wenz 2004, p. 370: "Turbomesodon presenting the following unique combination of primitive and derived characters: dorsal apex at the point of insertion of the dorsal fin; ventral apex absent; coronoid process high, with straight dorsal border; about 32 vertebrae (epichordal elements excluding those of the caudal endoskeleton); first one or two dorsal axonosts not supporting fin rays (one or two free dorsal axonosts present); about 39 dorsal and 30 anal axonosts; caudal fin double emarginated; dorsal and anal fins sigmoid in contour, placed at 60-69 % of standard length; pelvic fins at 45-55 % of standard length; some anterior dorsal ridge scales eventually separated from each other; 17-20 ventral keel scales; 6 postcloacal ventral keel scales; up to 5 spines on contour scales; spines on each ventral keel scale in contact with each other; supracloacal scale ventrally in contact with cloacal scales only" References: Poyato-Ariza, F. & Wenz, S.(2004): The new pycnodontid fish genus Turbomesodon, and a revision of Macromesodon based on new material from the Lower Cretaceous of Las Hoyas, Cuenca, Spain. Mesozoic Fishes 3 - Systematics, Paleoenvironments and Biodiversity, G. Arratia & A. Tintori (eds.): pp. 341-378,15 figs., 1 tab., 3 apps. Ebert M, Kölbl-Ebert M, Lane JA (2015) Fauna and Predator-Prey Relationships of Ettling, an Actinopterygian Fish-Dominated Konservat-Lagerstätte from the Late Jurassic of Southern Germany. PLoS ONE 10(1): e0116140. doi:10.1371/ journal.pone.0116140
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Taxonomy from Maxwell et al. 2020. Identified by oilshale. References: Agassiz L. (1843) Recherches Sur Les Poissons Fossiles. Tome I (livr. 18). Imprimerie de Petitpierre, Neuchatel xxxii-188. Maxwell, E.E., Lambers, P.H., López-Arbarello, A., and Schweigert G. (2020) Re-evaluation of pachycormid fishes from the Late Jurassic of Southwestern Germany. Acta Palaeontologica Polonica 65 (3): 429–453.
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Taxonomy from Grande & Bemis 1998. Diagnosis for the subfamily from Grande & Bemis 1998, p. 450: "†Solnhofenamiinae subfam. nov. differs from all other amiid subfamilies (Amiinae, †Vidalamiinae subfam. nov., and †Amiopsinae subfam. nov.) in the following adult characters A and B. (A) There is only a single subinfraorbital, and it is slender and rod-like (versus either a series of two or more subinfraorbitals or a single deep subinfraorbital bone, in all other amiids). (B) There is a higher number of epaxial procurrent caudal fin rays than in any other amiid (12 to 15). Both A and B are discussed further on page 596 and pages 582 and 583 as characters 43 (character state 2) and 44. Also, like †Amiopsinae subfam. nov. but unlike Amiinae and †Vidalamiinae subfam. nov., †Solnhofenamiinae subfam. nov. has a suborbital bone and a relatively low number of dentary teeth in adult-sized individuals (12 to 13 versus 15 to 17 in adult-sized †Vidalamiinae subfam. nov. and 14 to 21 in adult-sized Amiinae)." Diagnosis for the genus from Grande & Bemis 1998, p. 450: "As for subfamily (the subfamily contains only one genus with one species as used here)." Line drawing from Grande & Bemis 1998, p. 459: Identified by oilshale using Grande & Bemis 1998. References: Grande, L. & Bemis, W. (1998): A Comprehensive Phylogenetic Study of Amiid Fishes (Amiidae) Based on Comparative Skeletal Anatomy. an Empirical Search for Interconnected Patterns of Natural History. Journal of Vertebrate Paleontology. Vol. 18, 1998, Issue Supp-001, pp. 1-696.
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References: Kriwet, J. (2005).:A comprehensive study of the skull and dentition of pycnodont fishes. Zitteliana, 2005, A45, pp. 135-188.
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Several Late Jurassic macrosemiids are known from the Solnhofen limestones, including at least Notagogus, Histionotus, Voelklichthys and two species of Propterus.: P. elongatus and P. microstomus. Diagnosis from Bartram 1977, p.168: "Propterus reaching standard length of 130 mm; mean proportions as percentages of standard length: head length 34 %, trunk depth 36 %, predorsa] length 42 %, prepelvic length 58 %, preanal length 79 %; fin—ray counts: D(ant.) 14-16, D(post.) 14-16, P 17, V 6, A 5, C 14-15; about 37 lateral line scales; scales thin with large serrations; two lobes of dorsal fin very close together; outline of anterior dorsal convex; fulcra absent from posterior dorsal; caudal fin-rays bifurcating a maximum of twice. Line drawing from Bartram 1977, p. 169: Identified by oilshale using Bartram, 1977. References: Bartram, A.W.H. (1977) The Macrosemiidae, a Mesozoic family of Holostean fishes. Bulletin of the British Museum of Natural History (Geology), 29, 137-234. Gloria Arratia and Hans-Peter Schultze (2012): The macrosemiiform fish companion of the Late Jurassic theropod Juravenator from Schamhaupten, Bavaria, Germany. Fossil Record 15 (1) 2012, 5–25 / DOI 10.1002/mmng.201200001.
