Agerchlamys textoria (Schlotheim, 1820)
SCHLOTHEIM, E. F. VON. 1820. Die Petrefactenkunde auf ihrem jetzigen Standpunkte durch die Beschreibung seiner Sammlung versteinerter und fossiler Überreste des Thier- und Pflanzenreichs der Vorwelt erläutert. lxii, 437 p. Becker'schen Buchhandlung. Gotha, 1820. [p. 229]
1820 Pectinites textorius Schlotheim, 1820
1826 Pecten vimineus J. de C. Sowerby, 1926
1828 Pecten elegans Young & Bird, 1828
1829 Pecten virguliferus Phillips, 1829
1833 Pecten textilis Münster in Goldfuss, 1833
1833 Pecten texturatus Münster in Goldfuss, 1833
1833 Pecten ambiguus Münster in Goldfuss, 1833
1833 Pecten subtextorius Münster in Goldfuss, 1833
1836 Pecten subimbricatus Roemer, 1836
1837 Pecten textorius var. orbicularis Koch & Dunker, 1837
1850 Pecten niso Orbigny, 1850
1850 Pecten nisus Orbigny, 1850
1850 Pecten nothus Orbigny, 1850
1850 Pecten subarticulatus Orbigny, 1850
1850 Pecten phillis Orbigny, 1850
1850 Pecten luciensis Orbigny, 1850
1850 Pecten camillus Orbigny, 1850
1850 Pecten opis Orbigny, 1850
1855 Pecten icaunensis Cotteau, 1855 [partim]
1855 Pecten desmoulinsianus Cotteau, 1855
1856 Pecten dewalquei Oppel, 1856
1856 Pecten textorius [gamma] Quenstedt, 1856
1856 Pecten trigeri Oppel, 1856
1856 Pecten textorius torulosi Quenstedt, 1856
1857 Pecten textorius albus Quenstedt, 1857
1857 Pecten subtextorius schnaitheimensis Quenstedt, 1857
1859 Pecten benedicti Contejean, 1859
1859 Pecten billoti Contejean, 1859
1861 Pecten rollei Stoliczka, 1861
1861 Pecten verticillus Stolicza, 1861
1862 Pecten hermanciae Étallon in Thurmann & Étallon, 1862
1863 Pecten splendens Dollfus, 1863
1864 Pecten securis Dumortier, 1864
1865 Pecten canaliculatus, Terquem & Piette, 1865
1866 Pecten sismondae Capellini, 1866
1869 Pecten semispinatus Terquem & Jourdy, 1869
1869 Pecten fortunatus Dumortier, 1869
1874 Pecten erctensis Gemmellaro & Di Blasi, 1874
1874 Pecten anastomoplicus Gemmellaro & Di Blasi, 1874
1875 Pecten quenstedti Blake, 1875
1878 Pecten janiformis Lundgren, 1878
1878 Pecten (Chlamys) veneris Gemmellaro & Di Blasi in Gemmellaro, 1878
1879 Pecten lotharingicus Branco, 1879
1881 Pecten paraphoros Boehm, 1881
1882 Pecten ponzii Gemmelaro, 1874
1893 Pecten pelops Loriol in Loriol & Lambert, 1893
1893 Pecten ferax Loriol, 1893
1893 Pecten dewalquei var. jurensis Riche, 1893
1894 Pecten bipartitus Futterer, 1894
1894 Pecten episcopalis Loriol, 1894
1895 Pecten guyoti Loriol, 1895
1898 Pecten (Chlamys) silanus Greco, 1898
1899 Pecten andinus R. A. Philippi, 1899
1903 Pecten moravicus Remes, 1903
1903 Pecten strambergensis Remes, 1903
1904 Pecten (Chlamys) etiveyensis Loriol, 1904
1904 Pecten (Chlamys) blyensis Loriol, 1904
1904 Pecten (Chlamys) bourgeati Loriol, 1904
1906 Pecten capillatus Fucini, 1906
1906 Pecten ugolinii Fucini, 1906
1911 Chlamys bathonica Cossmann, 1911
1911 Pecten (Chlamys) protextorius Rollier, 1911
1911 Pecten (Chlamys) schombergensis Rollier, 1911
1911 Pecten (Chlamys) brisgoviensis Rollier, 1911
1911 Pecten (Chlamys) lecetti Rollier, 1911
1911 Pecten (Chlamys) schlippei Rollier, 1911
1914 Chlamys gadoisi Cossman, 1914
1916 Chlamys articulata var. notgroviensis Paris & Richardson, 1916
1916 Chlamys articulata var. sauzeana Paris & Richardson, 1916
1916 Eopecten articulatus Paris & Richardson, 1916
1917 Pecten lahuseni Borissiak & Ivanoff, 1917
1917 Pecten subambiguus Borissiak & Ivanoff, 1917
1917 Pecten peuanus Tilmann, 1917
1920 Pecten rolleiformis Fucini, 1920
1936 Chlamys neumarktensis Kühn, 1936
1957 Chlamys kurumensis Kobayashi & Hayami in Hayami, 1957
1974 Chlamys enantyi Skwarko, 1974
1978 Chlamys (Chlamys) bedfordensis Duff, 1978
1826 Pecten vimineus J. de C. Sowerby, 1926
1828 Pecten elegans Young & Bird, 1828
1829 Pecten virguliferus Phillips, 1829
1833 Pecten textilis Münster in Goldfuss, 1833
1833 Pecten texturatus Münster in Goldfuss, 1833
1833 Pecten ambiguus Münster in Goldfuss, 1833
1833 Pecten subtextorius Münster in Goldfuss, 1833
1836 Pecten subimbricatus Roemer, 1836
1837 Pecten textorius var. orbicularis Koch & Dunker, 1837
1850 Pecten niso Orbigny, 1850
1850 Pecten nisus Orbigny, 1850
1850 Pecten nothus Orbigny, 1850
1850 Pecten subarticulatus Orbigny, 1850
1850 Pecten phillis Orbigny, 1850
1850 Pecten luciensis Orbigny, 1850
1850 Pecten camillus Orbigny, 1850
1850 Pecten opis Orbigny, 1850
1855 Pecten icaunensis Cotteau, 1855 [partim]
1855 Pecten desmoulinsianus Cotteau, 1855
1856 Pecten dewalquei Oppel, 1856
1856 Pecten textorius [gamma] Quenstedt, 1856
1856 Pecten trigeri Oppel, 1856
1856 Pecten textorius torulosi Quenstedt, 1856
1857 Pecten textorius albus Quenstedt, 1857
1857 Pecten subtextorius schnaitheimensis Quenstedt, 1857
1859 Pecten benedicti Contejean, 1859
1859 Pecten billoti Contejean, 1859
1861 Pecten rollei Stoliczka, 1861
1861 Pecten verticillus Stolicza, 1861
1862 Pecten hermanciae Étallon in Thurmann & Étallon, 1862
1863 Pecten splendens Dollfus, 1863
1864 Pecten securis Dumortier, 1864
1865 Pecten canaliculatus, Terquem & Piette, 1865
1866 Pecten sismondae Capellini, 1866
1869 Pecten semispinatus Terquem & Jourdy, 1869
1869 Pecten fortunatus Dumortier, 1869
1874 Pecten erctensis Gemmellaro & Di Blasi, 1874
1874 Pecten anastomoplicus Gemmellaro & Di Blasi, 1874
1875 Pecten quenstedti Blake, 1875
1878 Pecten janiformis Lundgren, 1878
1878 Pecten (Chlamys) veneris Gemmellaro & Di Blasi in Gemmellaro, 1878
1879 Pecten lotharingicus Branco, 1879
1881 Pecten paraphoros Boehm, 1881
1882 Pecten ponzii Gemmelaro, 1874
1893 Pecten pelops Loriol in Loriol & Lambert, 1893
1893 Pecten ferax Loriol, 1893
1893 Pecten dewalquei var. jurensis Riche, 1893
1894 Pecten bipartitus Futterer, 1894
1894 Pecten episcopalis Loriol, 1894
1895 Pecten guyoti Loriol, 1895
1898 Pecten (Chlamys) silanus Greco, 1898
1899 Pecten andinus R. A. Philippi, 1899
1903 Pecten moravicus Remes, 1903
1903 Pecten strambergensis Remes, 1903
1904 Pecten (Chlamys) etiveyensis Loriol, 1904
1904 Pecten (Chlamys) blyensis Loriol, 1904
1904 Pecten (Chlamys) bourgeati Loriol, 1904
1906 Pecten capillatus Fucini, 1906
1906 Pecten ugolinii Fucini, 1906
1911 Chlamys bathonica Cossmann, 1911
1911 Pecten (Chlamys) protextorius Rollier, 1911
1911 Pecten (Chlamys) schombergensis Rollier, 1911
1911 Pecten (Chlamys) brisgoviensis Rollier, 1911
1911 Pecten (Chlamys) lecetti Rollier, 1911
1911 Pecten (Chlamys) schlippei Rollier, 1911
1914 Chlamys gadoisi Cossman, 1914
1916 Chlamys articulata var. notgroviensis Paris & Richardson, 1916
1916 Chlamys articulata var. sauzeana Paris & Richardson, 1916
1916 Eopecten articulatus Paris & Richardson, 1916
1917 Pecten lahuseni Borissiak & Ivanoff, 1917
1917 Pecten subambiguus Borissiak & Ivanoff, 1917
1917 Pecten peuanus Tilmann, 1917
1920 Pecten rolleiformis Fucini, 1920
1936 Chlamys neumarktensis Kühn, 1936
1957 Chlamys kurumensis Kobayashi & Hayami in Hayami, 1957
1974 Chlamys enantyi Skwarko, 1974
1978 Chlamys (Chlamys) bedfordensis Duff, 1978
Pecten textorius (Schlotheim); A. Goldfuss, 1833-1840, Petrefacta Germaniae, plate 89, figures 9a-9d.
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«Aus äterm Flötzkalk (sogenannten Gryphitenkalk) von Amberg, theils der Gebirgsart aufliegend, theils, in freyen Exemplaren, mit versteinerter Schaale, jedoch etwas beschädigt, und einige mit beyden Hälften. (4 Ex.)
In der Form und Queerstreifung dem Pectin, asper anhlich, aber die Beschaffenheit und Richtung der Strahlen sehr verschieden. Sie sind ungleich dünner, liegen viel enger zusammen, und zwischen jedem etwas stärkern und hervorspringenden wird abwechselnd ein etwas tiefer liegender, feinerer sichtbar. Äusserst feine scharf hervortretende Queerstreifen, welche eng zusammen laufen, und auf jedem Längenstrahl kleine hervorstehende Schuppen bilden, geben dem Ganzen ein gestrickfes oder gewebtes Ansehen. Beyde Hälften sind flach und gleichförmig gewölbt. Scheint nicht sehr häufig vorzukommen, und ist in schön erhaltenen und vollständigen Exemplaren sehr selten.»
ERNST FRIEDRICH VON SCHLOTHEIM, 1820
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«Stratigraphically above the boundary interval are several fossil rich beds that continue downward to the water’s edge. The fauna of these younger beds (the dark shale of the boundary interval and more carbon ate rich beds) is dominated by pectenacean bivalves represented by Agerchlamys cf. textoria (Fig. 6). These pectinoids were originally described from the Grotta Arparia section by Capellini (1866-67) under the names Pecten falgeri Merian and Pecten sismondae Capellini, but they posses distinctive commarginal ornament on the disk and auricles typical of Agerchlamys (see also Johnson, 1984). Cartwright (1995) also notes several other bivalve taxa in this interval, including Parallelodon, Plagiostoma, and Spondylus. Although isolated corals occur within molluscan wackestone from the Hettangian portions of the Grotta Arpaia section (see Fig. 6), Capellini (1866-67) only described corals (under the names as Axosmilia and Montlivaltia) from Tino and Tinetto without reference to their stratigraphic position. These coral beds also contain indeterminate thin-shelled bivalves and larger gastropods.»
RIGO, M., C. A. McROBERTS, G. CIAPARICA, N. GIORDANO & A. BACHAN. 2013. New Stratigraphic, paleontologic and geochemical data around the Triassic-Jurassic boundary at Portovenere (Northern Apennines, Italy). Bulletin of the New Mexico Museum of Natural History and Science, 61: 489-499, figs. 1-9. [p. 492]
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Agerchlamys cf. A. textoria (Schlotheim); M. Rigo et al., 2013, New Stratigraphic, paleontologic and geochemical data around the Triassic-Jurassic boundary at Portovenere, figure 6.2.
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«Description. Shell small to medium in size, higher than long, slightly inequilateral and almost equivalved. Disc weakly inflated with low disc flanks, sub-ovate in adults, sub-orbicular in young specimens. Auricles well demarcated from disc, bearing commarginal imbricate lamellae. Shell ornamented with a variable number of radial plicae, which increase in number by splitting or by intercalation. Distance between plicae variable. Shell surface covered with imbricate commarginal lamellae, which are irregularly arranged.
Remarks. This species has a cosmopolitan distribution in the Jurassic and a highly varied morphology. It is distinguished from other Jurassic Chlamys (C.) species by the presence of imbricate lamellae on the plicae. Specimens described by JOHNSON (1984) vary in the number of plicae. Accordingly he divided C. textoria into three ecophenotypic variants. Most specimens from eastern Serbia bear dense plicae (more than 36) and belong to the “fine” phenotype. The same density of plicae was observed in Bulgarian specimens (BONČEV & CANKOV 1935; SHOPOV 1968). Another common characteristic of the Bulgarian material is a maximum height of about 80 mm, slightly less than the maximum height (88 mm) of the species given by JOHNSON (1984). Occurrence. Sinemurian and Pliensbachian of Senokos; Pliensbachian of Bogorodica, Rosomač, Radejna, and Velika Lukanja.» RADULOVIĆ, B. 2013. Lower Jurassic bivalves of eastern Serbia. Beringeria, 43: 3-61, pls. 1-20. [p. 34]
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Chlamys (Chlamys) textoria (Schlotheim, 1820); B. Radulović, 2013, Lower Jurassic bivalves of eastern Serbia, plate 11, figures 6-10.
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«Although model calculations necessarily use simplified assumptions, we note a remarkable agreement of Berner and Beerling’s (2007, fig. 2) CaCO3 saturation curve with our macrofaunal data from the NCA. In the initial extinction phase, which we assume corresponds to the period when CaCO3 saturation was reduced but still >1 at least for calcite, three of the four recorded bivalve species had calcitic outer shell layers (Pseudolimea cf. hettangiensis, Agerchlamys textoria, Meleagrinella sp.), and the only brachiopod species (Lingula sp.) had a noncalcareous shell. The only bivalve species with a completely aragonitic shell was Cardinia hybrida.»
McROBERTS, C., L. KRYSTYN & M. HAUTMANN. 2012. Macrofaunal response to the end-Triassic mass extinction in the West-Tethyan Kössen Basin, Austria. Palaios, 27: 607-616, figs. 1-5. [p. 613]
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Agerchlamys textoria; C. A. McRoberts, P. D. Ward & S. Hesselbo, 2012, Macrofaunal response to the end-Triassic mass extinction in the West-Tethyan Kössen Basin, Austria, figure 4.C.
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«2. AMENDED DIAGNOSIS
Distinguished from other Jurassic species of Ch. (Chlamys) by the presence of imbricate lamellae on the plicae.
3. AMENDED DESCRIPTION
Disc shape variable, sub-orbicular early in ontogeny, becoming increasingly sub-ovate, higher than long (text fig. 148) towards the maximum height of 93.5 mm (GPIT 2-92-3). Umbonal angle increasing during ontogeny but very variable, tending to be relatively high in forms with many plicae (text figs. 149, 147). Dorsal margins concave; disc flanks low.
Approximately equilateral; inequivalve, left valve lowmoderate convexity, right valve usually almost flat. Intersinal distance variable, greater in left valve than right, increasing isometrically in the former and at a decreasing rate with respect to length in the latter (text figs. 150, 151). Depth of byssal notch variable, moderate to large, but increasing with approximate isometry (text fig. 152). Auricles well demarcated from disc, variable in size. Both posterior auricles meeting hinge line at an obtuse angle and disc at an acute angle. Anterior auricles meeting disc at an acute angle and hingeline at a variable angle, 90° or less. All auricles bearing comarginal imbricate lamellae, anterior auricle of Ieft valve also bearing radial striae of variable prominence. Anterior auncle height variable (text fig. 153). Anterior and posterior hinge lengths both variable, former mcreasing with respect to length at a slightlv decreasing rate (text fig. 154), latter increasing at a slightly increasing rate (text fig. 155). Disc exterior ornamented with a variable number of radial plicae, tending to increase in number by either intercalation or Splitting but at a very variable rate (PI. 6, Figs. 10-12, PI. 7, Figs. 1-23, PI. 8, Figs. 1-3, 5-20). Between 17 and 30 plicae at the earliest stages in ontogeny, between 17 and 98 at L: 20 (text fig. 146), between 17 and 121 at L: 40 (text fig. 146) and between 17 and at least 62 at L: 60 (text fig. 146). Plicae bearing variably spaced imbricate comarginal lamellae which tend to be closer and lower in forms with more plicae. Lamellae generally lower on right cf. Ieft valves of all forms. Shell thickness moderate. 4. DISCUSSION
The lectotype (herein designated) of 'Pectinites' textorius SCHLOTHEIM (HM M23; PI. 8, Fig. 20) is a poorly preserved specimen but the Ornament and metric proportions (1) clearly fall within the range of the species described in Section 3. The latter, by reason of the historically senior position of SCHLOTHEIM's taxonomic species is therefore known hereinafter as Chlamys (Ch.) textoria.»
JOHNSON, A. L. A. 1984. The palaeobiology of the bivalve families Pectinidae and Propeamussiidae in the Jurassic of Europe. Zitteliana, 11: 1-235, pls. 1-11. [p. 167, 168]
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Chlamys (Chlamys) textoria (Schlotheim, 1820); A. L. A. Johnson, 1984, The palaeobiology of the bivalve families Pectinidae and Propeamussiidae in the Jurassic of Europe, plate 6, figures 10-12; plate 7, figures 1-23; plate 8, figures 1-3, 5-20, ? figure 4..
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