Find research datasets worth reusing

FIG. 9 in New data on the recent brachiopods from the Fiji and Wallis and Futuna islands, South-West Pacific

FIG. 9. — Eucalathis rugosa Cooper, 1973: A, B, dorsal and lateral views of complete specimen (MNHN BRA-3085), Fiji, Viti Levu, MUSORSTOM 10, stn DW 1384, 260-305 m;C-F, complete specimen (MHNH BRA-3060), Wallis and Futuna, MUSORSTOM 7, stn DW 601, 350 m; C, D, outer and inner views of ventral valve; E, F, outer and inner views of dorsal valve; G-I, complete specimen (MNHN BRA-3086), Fiji, Viti Levu, MUSORSTOM 10, stn DW 1384, 260-305 m; G, H, dorsal view (G) and enlargement of posterior part (H); I, interior of dorsal valve with slightly broken brachidium. All SEM. Scale bars: A-G, 1 mm; H, I, 500 μm.

FIG. 8 in New data on the recent brachiopods from the Fiji and Wallis and Futuna islands, South-West Pacific

FIG. 8. — Terebratulina reevei Dall, 1920, Fiji, Lau Ridge, MUSORSTOM 10, stn CP 1394, 416 m: A-D, complete specimen (MNHN BRA-3083); A, B, dorsal and anterior views; C, D, SEM micrograph of dorsal interior to show brachidium and details of cardinalia; E-G, dorsal, lateral and anterior views of complete specimen (MNHN BRA-3084). Scale bars: A-C, E-G, 2 mm; D, 1 mm.

FIG. 6. — A-H, Xenobrochus rotundus n in New data on the recent brachiopods from the Fiji and Wallis and Futuna islands, South-West Pacific

FIG. 6. — A-H, Xenobrochus rotundus n. sp., Fiji, Lau Ridge, BORDAU 1, stn DW 1469, 314-377 m, SEM: A-D, ventral, dorsal, lateral and anterior views of complete specimen, holotype (MNHN BRA-3075); E, F, inner views of ventral and dorsal valves, paratype (MNHN BRA-3076); G, H, dorsal view of complete specimen (G) and enlargement of dorsal interior (H) to show brachial skeleton, paratype (MNHN BRA-3077);I-L, Abyssothyris wyvillei (Davidson, 1878), complete specimen (MNHN BRA-3074), Fiji, Viti Levu, MUSORSTOM 10, CP 1361; I-K, dorsal, lateral and anterior views; L, SEM micrograph of dorsal interior to show cardinalia and brachidium. Scale bars: A-G, 2 mm; H, L, 1 mm; I-K, 0.5 cm.

FIG. 1 in New data on the recent brachiopods from the Fiji and Wallis and Futuna islands, South-West Pacific

FIG. 1. — South-western Pacific showing areas sampled during the cruises MUSORSTOM 7, 10, and BORDAU 1. Map from ZoNéCo, data after http://www.tropicaldeepseabenthos.org.

FIG. 5. — A-G in New data on the recent brachiopods from the Fiji and Wallis and Futuna islands, South-West Pacific

FIG. 5. — A-G, Basiliola lucida (Gould, 1862), Fiji, Lau Ridge, BORDAU 1: A-D, ventral, dorsal, lateral and anterior views of complete specimen (MNHN BRA-3069), stn DW 1472, 262-266 m; E, SEM micrograph of inner view of ventral valve, posterior part (MNHN BRA-3070), stn CP 1469, 314-377 m; F, G, SEM micrographs of posterior part of dorsal valve interior (MNHN BRA-3071), stn CP 1469, 314-377 m; H-L, Basiliola beecheri (Dall, 1895), Fiji, Lau Ridge; H-J, dorsal, lateral and anterior views of complete specimen (MNHN BRA-3072), stn CP 1412, 400-407 m; K, L, SEM micrographs of posterior part of dorsal valve interior (MNHN BRA-3073), stn CP 1394, 416 m. Scale bars: A-D, 0.5 cm; E-G, 1 mm; H-J, 1 cm; K, L, 2 mm.

FIG. 4 in New data on the recent brachiopods from the Fiji and Wallis and Futuna islands, South-West Pacific

FIG. 4. — Intraspecific variation in Cryptopora maldivensis Muir- Wood, 1959. Scatter diagram plotting length/width. N, number of specimens.

FIG. 2 in New data on the recent brachiopods from the Fiji and Wallis and Futuna islands, South-West Pacific

FIG. 2. — Pelagodiscus atlanticus (King, 1868), Wallis and Futuna, MUSORSTOM 7: A, B, dorsal view and enlargement (B) to show details of setae (MNHN BRA-3056),stn CP 621,1280-1300 m; C, dorsal view (MNHN BRA-3057),stn CP 621, 1280-1300 m; D, ventral view of complete specimen (MNHN BRA-3058),stn CP 623,1280-1300 m; E, F, inner view of ventral valve with soft tissue,visible traces of dorsal valve and dorsal setae, and enlargement (F) of lophophore (MNHN BRA-3059), stn CP 623, 1280-1300 m. Scale bars: A, C, 2 mm; B, D, E, 1 mm; F, 100 μm.

opencc-by-4.0Dec 2016View details →

Text-fig. 2. (A) Orientation of Schizocrania filosa (HALL, 1847) on articulated shells of benthic brachiopod Rafinesquina sp. (A1–A3 – on dorsal valve of articulated shells, A4 – on ventral valve of articulated shell; forward growth direction is unclear in three specimens) from Upper Ordovician, Corryville Formation, Lawrenceburg, Indiana (after www.drydredgers.org/scizo.htm). (B) Orientation of Schizocrania multistriata (REED, 1905) shells on outer face of conulariid Metaconularia imperialis test (Dobrotivá Formation, Kařízek mine, Barrandian area; after Havlíček and Vaněk 1996); preserved conulariid shell in white, suggested outline of incomplete conulariid test in grey. Arrows indicate direction of forward growth of Schizocrania specimens. in Schizocrania (Brachiopoda, Discinoidea): Taxonomy, Occurrence, Ecology And History Of The Earliest Epizoan Lingulate Brachiopod

Text-fig. 2. (A) Orientation of Schizocrania filosa (HALL, 1847) on articulated shells of benthic brachiopod Rafinesquina sp. (A1–A3 – on dorsal valve of articulated shells, A4 – on ventral valve of articulated shell; forward growth direction is unclear in three specimens) from Upper Ordovician, Corryville Formation, Lawrenceburg, Indiana (after www.drydredgers.org/scizo.htm). (B) Orientation of Schizocrania multistriata (REED, 1905) shells on outer face of conulariid Metaconularia imperialis test (Dobrotivá Formation, Kařízek mine, Barrandian area; after Havlíček and Vaněk 1996); preserved conulariid shell in white, suggested outline of incomplete conulariid test in grey. Arrows indicate direction of forward growth of Schizocrania specimens.

opencc-by-4.0Aug 2019View details →

Text-fig. 1. Schematic maps showing location of the Prague Basin in the Barrandian area of the Czech Republic (a), the Koněprusy area (b), quarries in the Koněprusy area (c) and Jirásek's and Preisler's quarries (d). The exact location of the section described by Hladil et al. (1993) (1) and the new sections where the brachiopods were extracted (2) are figured. Abbreviations: UDI – upper dark interval, VČS-E – Velkolom Čertovy schody – východ quarry. in Rhynchonelliform Brachiopods And Trilobites Of The 'Upper Dark Interval' In The Koněprusy Area Devonian, Eifelian, Kačák Event; The Czech Republic

Text-fig. 1. Schematic maps showing location of the Prague Basin in the Barrandian area of the Czech Republic (a), the Koněprusy area (b), quarries in the Koněprusy area (c) and Jirásek's and Preisler's quarries (d). The exact location of the section described by Hladil et al. (1993) (1) and the new sections where the brachiopods were extracted (2) are figured. Abbreviations: UDI – upper dark interval, VČS-E – Velkolom Čertovy schody – východ quarry.

opencc-by-4.0Aug 2019View details →

Text-fig. 3. Eastern wall of Jirásek's Quarry with studied section, with light-grey Acanthopyge Limestones in lower half of the wall, the UDI (in brown) in upper half followed by bioclastic breccia (Bed 46 sensu Hladil 1993) near the edge of the wall (a) and detail of UDI and adjacent limestones with the most productive beds (b). Photo January, 2019. in Rhynchonelliform Brachiopods And Trilobites Of The 'Upper Dark Interval' In The Koněprusy Area Devonian, Eifelian, Kačák Event; The Czech Republic

Text-fig. 3. Eastern wall of Jirásek's Quarry with studied section, with light-grey Acanthopyge Limestones in lower half of the wall, the UDI (in brown) in upper half followed by bioclastic breccia (Bed 46 sensu Hladil 1993) near the edge of the wall (a) and detail of UDI and adjacent limestones with the most productive beds (b). Photo January, 2019.

opencc-by-4.0Aug 2019View details →

Text-fig. 2. Studied section in Jirásek's Quarry with essential data on lithology and samples studied on rhynchonelliform brachiopods and trilobites (black dots – productive, white dots – barren). in Rhynchonelliform Brachiopods And Trilobites Of The 'Upper Dark Interval' In The Koněprusy Area Devonian, Eifelian, Kačák Event; The Czech Republic

Text-fig. 2. Studied section in Jirásek's Quarry with essential data on lithology and samples studied on rhynchonelliform brachiopods and trilobites (black dots – productive, white dots – barren).

dryad40/100

Data from: How long does a brachiopod shell last on a seafloor? Modern mid-bathyal environments as taphonomic analogues of continental shelves prior to the Mesozoic Marine Revolution

Carbonate skeletal remains are altered and disintegrate at yearly to decadal scales in present-day shallow-marine environments with intense bioerosion and dissolution. Present-day brachiopod death assemblages are invariably characterized by poor preservation on continental shelves, and abundant articulated shells of brachiopods with well-preserved brachidia are thus not expected to be preserved if not rapidly buried. However, such preservation is paradoxically observed in shallow-water Paleozoic and Mesozoic brachiopod assemblages. Here, we show that a bathyal death assemblage time-averaged to several millennia (Adriatic Sea) consists of sediment-filled articulated shells of Gryphus vitreus with complete brachidia. Postmortem age distributions indicate that disintegration half-lives exceed several centuries (~500-1,700 years). The high frequency of articulated but centuries-old shells (>50%) and the fitting of taphonomic models to postmortem ages indicate that disarticulation half-life is unusually long (~200 years). Rapid sediment filling of shells (1) inhibited disarticulation, loop fragmentation and colonization by coelobites and (2) induced precipitation of ferromanganese oxides at redox fronts within shells. Sediment-filled articulated shells, however, still resided at the sediment-water interface as indicated by encrusters and sponges that infested them after death. Sediment-filled shells disintegrated through bioerosion and wear when residence time in the taphonomically active zone exceeded ~2,000 years. We suggest that the articulation paradox is driven by the Mesozoic Marine Revolution (MMR) that escalated predation, bioturbation and organic matter recycling, all intensifying shell disintegration. A scenario with slow disarticulation in bathyal environments can be an analogue of conditions leading to preservation of articulated shells in shallow-water assemblages prior to the MMR.

opencc-zeroNov 2022View details →

opencc-by-4.0Dec 2022View details →

Text-fig. 4. Taphonomic features of the studied localities of ammonoids. a: Sandstone slab with fragmentary remains of productid and spiriferid brachiopods, orthocerids, coiled nautiloids and ammonoids (stratigraphic level No. 3). b: Shell debris cluster and fragment of crushed ammonoid conch (stratigraphic level No. 1). c: Epibionts on the surface of an ammonoid conch (stratigraphic level No. 5). d: Cluster of bivalves, gastropods and cephalopods remains in a siderite nodule (stratigraphic level No. 5). e: Fragment of an ammonoid conch (stratigraphic level No. 3). f: Fragment of an ammonoid conch (?) with terminal aperture and brachiopod valve (stratigraphic level No. 3). g: Specimen of?Anthracoceratites sp. with conch injuries (shown by arrows) (stratigraphic level No. 8). h, i: Bioerosion trace fossils Cyclopuncta girtyi ELIAS, 1958 on the fragments of cephalopod conchs (stratigraphic level No. 5). j: Limonitized conchs of the ammonoid (stratigraphic level No. 7). k: Fragment of an ammonoid conch (stratigraphic level No. 5). Scale bars 10 mm. in Late Bashkirian Ammonoids From The Mospyne Formation Of The Donets Basin, Ukraine

Text-fig. 4. Taphonomic features of the studied localities of ammonoids. a: Sandstone slab with fragmentary remains of productid and spiriferid brachiopods, orthocerids, coiled nautiloids and ammonoids (stratigraphic level No. 3). b: Shell debris cluster and fragment of crushed ammonoid conch (stratigraphic level No. 1). c: Epibionts on the surface of an ammonoid conch (stratigraphic level No. 5). d: Cluster of bivalves, gastropods and cephalopods remains in a siderite nodule (stratigraphic level No. 5). e: Fragment of an ammonoid conch (stratigraphic level No. 3). f: Fragment of an ammonoid conch (?) with terminal aperture and brachiopod valve (stratigraphic level No. 3). g: Specimen of?Anthracoceratites sp. with conch injuries (shown by arrows) (stratigraphic level No. 8). h, i: Bioerosion trace fossils Cyclopuncta girtyi ELIAS, 1958 on the fragments of cephalopod conchs (stratigraphic level No. 5). j: Limonitized conchs of the ammonoid (stratigraphic level No. 7). k: Fragment of an ammonoid conch (stratigraphic level No. 5). Scale bars 10 mm.

Fig. 9 in Strophomenide and orthotetide Silurian brachiopods from the Baltic region, with particular reference to Lithuanian boreholes

Fig. 9. Diagram showing the relative dispositions of E. (Eoplectodonta) and E. (Ygerodiscus) from west to east in the East Baltic platform.

Fig. 7 in Strophomenide and orthotetide Silurian brachiopods from the Baltic region, with particular reference to Lithuanian boreholes

Fig. 7. Eoplectodonta (E.) penkillensis (Reed, 1917), B20497, Riga Formation (Sheinwoodian, M. riccartonensis Zone), eroded bedding plane with the Clorinda sp., Vilkaviškis−129, 837.1 m, × 3.4.

Fig. 1. Study area. A in Drilling predation on Permian brachiopods and bivalves from the Glass Mountains, west Texas

Fig. 1. Study area. A. Location of Texas within the United States. B. Location of the city of Marathon with respect to other cities in Texas. C. Location of the Glass Mountains in the area of Marathon, Texas (modified from Cooper and Grant 1972).

Fig. 5 in New bizarre micro-spiriferid brachiopod from the Early Carboniferous of China

Fig. 5. Plication patterns of ventral (A) and dorsal (B) valves of Changshunella yangi gen. et sp. nov.

Fig. 3 in Soft-tissue preservation in the Lower Cambrian linguloid brachiopod from South China

Fig. 3. Plots of maximum length (Ll)/maximum width (Wl) between the paired brachia of Lingulellotreta malongensis based on ElI collection from the Early Cambrian Chengjiang fauna at Haikou, Kunming, South China. See Fig. 5 for location of measurement.

Fig. 2 in Soft-tissue preservation in the Lower Cambrian linguloid brachiopod from South China

Fig. 2. Interpretative drawings of the interiors of Lingulellotreta malongensis shown in Fig. 1. A. Sketch of Fig. 1A. B. Sketch of Fig. 1C. C. Sketch of Fig. 1G. Scale bars 1 mm.

Fig. 4 in New bizarre micro-spiriferid brachiopod from the Early Carboniferous of China

Fig. 4. Reconstruction of conjunct shell of Changshunella yangi gen. et sp. nov. in posterior (A), anterior (B), lateral (C), dorsal (D), and ventral (E) views.