Find research datasets worth reusing

opencc-by-4.0Nov 2021View details →

Fig. 10 in Systematics, morphology, and appendages of an Early Ordovician pilekiine trilobite Anacheirurus from Fezouata Shale and the early diversification of Cheiruridae

Fig. 10. Trilobite exopodite reconstructions grouped by geological age. A. Eoredlichia intermediata (Lu, 1940), based on Ramsköld and Edgecombe 1996). B. Hongshiyanaspis yiliangensis Zhang and Lin in Zhang et al., 1980, based on Zeng et al. (2017). C. Redlichia rex Holmes, 2019, based on Holmes et al. (2019). D. Olenoides serratus (Rominger, 1887), based on Whittington 1980). E. Anacheirurus adserai (Vela and Corbacho, 2007). F. Ceraurus pleurexanthemus Green, 1832, based on Størmer (1951). G. Triarthrus eatoni (Hall, 1838), based on Whittington and Almond (1987). H. Cryptolithus bellulus (Ulrich, 1879), based on Campbell (1975). I. Chotecops ferdinandi Kayser, 1880), based on Bruton and Haas (1999).

opencc-by-4.0Nov 2021View details →

Fig. 3 in Systematics, morphology, and appendages of an Early Ordovician pilekiine trilobite Anacheirurus from Fezouata Shale and the early diversification of Cheiruridae

Fig. 3. Juveniles of the cheirurid trilobite Anacheirurus adserai from the Fezouata Shale, Araneograptus murrayi Zone, Tremadocian, Lower Ordovician, near Beni Zouli, Zagora Province, Morocco. A. MGL 104146, late meraspid stage. B. MGL 102153, early holaspid stage. C. MGL 104533, early holaspid stage. Specimens in B, C covered by ammonium chloride. Scale bars 1 mm.

opencc-by-4.0Nov 2021View details →

Fig. 4 in Systematics, morphology, and appendages of an Early Ordovician pilekiine trilobite Anacheirurus from Fezouata Shale and the early diversification of Cheiruridae

Fig. 4. Endopodites of the cheirurid trilobite Anacheirurus adserai (Vela and Corbacho, 2007) from the Fezouata Shale, Araneograptus murrayi Zone, Tremadocian, Lower Ordovician, near Beni Zouli, Zagora Province, Morocco. A. MGL 103863, photograph under alcohol with polarized light (A1), explanatory drawing with podomere numbers (A2). B. MGL 102225, photograph under alcohol with polarized light (B1), explanatory drawing with endopodite numbers (B2). Scale bars 1 mm. Abbreviations: ar, axial ring.

opencc-by-4.0Dec 2020View details →

FIGURE 6 in Anthropologically introduced biases in natural history collections, with a case study on the invertebrate paleontology collections from the middle Cambrian Spence Shale Lagerstätte

FIGURE 6. Publications over time that refer specifically to Spence Shale specimens or use quantitative data from the Spence Shale in an analysis.

opencc-by-4.0Dec 2020View details →

FIGURE 4 in Anthropologically introduced biases in natural history collections, with a case study on the invertebrate paleontology collections from the middle Cambrian Spence Shale Lagerstätte

FIGURE 4. Specimens in the KUMIP collections by locality, breaking down number of specimens of biomineralizing and soft-bodied taxa from each locality.

opencc-by-4.0Dec 2020View details →

FIGURE 1 in Anthropologically introduced biases in natural history collections, with a case study on the invertebrate paleontology collections from the middle Cambrian Spence Shale Lagerstätte

FIGURE 1. Examples of anthropological actions that create bias in natural history collections and when they occur.

opencc-by-4.0Dec 2017View details →

Database of physical and chemical properties and thresholds relevant to shale gas

<p>Results of the data collection effort on the chemical, physical and toxicity properties as well as permitted concentration levels in drinking water of chemicals that are frequently used in the fracking process.</p>

opencc-by-4.0Jul 2018View details →

Marcellus shale water and air quality data

<p>Data summary for water and air quality of the Marcellus shale</p>

opencc-by-4.0Oct 2019View details →

Fig. 3 in The oldest "intermetamorphic" larva of an achelatan lobster from the Lower Jurassic Posidonia Shale, South Germany

Fig. 3. Size comparison of different non-phyllosoma type achelatan larvae. All specimens as idealised restorations. The light grey areas represent body parts not being preserved, but inferred. A. Polzicaris sahelalmae (based on Haug et al. 2013a). B. SMNS 70449. C. "Palinurina" tenera, earliest (C1) and largest (C2) known stage (based on Haug and Haug 2016). D. Cancrinos claviger, earlier larva still possessing exopods (D1), later larva with exopods already absent (D2), possible juvenile, yet without triangular sternum (D3) (D1, D2, based on Haug et al. 2013a; D3, based on Haug and Haug 2015).

opencc-by-4.0Oct 2019View details →

Fig. 1 in The oldest "intermetamorphic" larva of an achelatan lobster from the Lower Jurassic Posidonia Shale, South Germany

Fig. 1. Larva of Achelata gen. et sp. indet. (SMNS 70449), Toarcian, Lower Jurassic, Gomaringen, Southern Germany. A. Composite microscopic photograph under cross-polarised light. B. Colour-marked photograph indicating the visible structures. Abbreviations: ba, basipod; cx, coxa; e1–5, endopod element 1–5; m3, maxilliped 3; p2–6, pleon segment 2–6; t4–8, thoracic appendages 4–8 ("pereiopods" 1–5).

opencc-by-4.0Oct 2019View details →

Fig. 2 in The oldest "intermetamorphic" larva of an achelatan lobster from the Lower Jurassic Posidonia Shale, South Germany

Fig. 2. Larva of Achelata gen. et sp. indet. (SMNS 70449), Toarcian, Lower Jurassic, Gomaringen, Southern Germany. A. Stereo-image showing original relief of the fossil; based on virtual surface. B. Depth-inverted stereo-image showing morphologically correct relief in ventral view. Please use red-cyan glasses to view A and B. C. Non-stereo image; colour-marked are the elevations of the thoracic sternum.

Fig. 3 in Burgess Shale-type microfossils from the middle Cambrian Kaili Formation, Guizhou Province, China

Fig. 3. Sclerites of the problematic lophotrochozoan Wiwaxia (NIGP 153962–153977) from the middle Cambrian Kaili Formation, Guizhou, China. A. KAIL−05−01−N28. B. KAIL−GTBM−9−2−a−M38. C. KAIL−05−01−S43. D. KAIL−GTBM−9−35M−02−F25. E. KAIL−05−01−T15. F. KAIL−A−01−R33. G. KAIL−05−03−L36. H. KAIL−GTBM−9−2−b−D40. I. KAIL−GTBM−9−2−d−P33. J. KAIL−GTBM−9−2−d−N34. K. KAIL−GTBM−9−35M−02−J34. L. KAIL− GTBM−9−37M−01−S46 (image reversed). M. KAIL−07−01−L24. N. KAIL−A−01−P37. O. KAIL−05−05−T6. P. KAIL−GTBM−9−37M−01−M22. Scale bars: A 200 µm, B–P 100 µm.

Fig. 7 in Burgess Shale-type microfossils from the middle Cambrian Kaili Formation, Guizhou Province, China

Fig. 7. Problematic metazoan microfossils (NIGP 153992–154010) from the middle Cambrian Kaili Formation, Guizhou, China. A–F. Ornamented spines cf. Rushtonites/Mongolitubulus. A. KAIL−04−05−M10. B. KAIL−GTBM−9−35M−02−G23. C. KAIL−BP−01−K41. D. KAIL−X−01−P42. E. KAIL−09−01−S31. F−J. Possible elements of a lophotrochozoan jaw apparatus. F. KAIL−05−01−U23. G. KAIL−04−2−T39 (G1); detail (G2). H. KAIL−GTBM−9−2−d−F6 (image reversed). I. KAIL−BP−01−N25 (image reversed). J. KAIL−GTBM−9−2−d−E9. K−O. Diverse spinose forms including possible elements of a radula−like apparatus (M, N). K. KAIL−04−07−Q33. L. KAIL−05−03−J25. M. KAIL−GTBM−9−35M−02−N41. N. KAIL−05−03−M17. O. KAIL−04−09−X27. P, Q. Possible arthropodan seta (P) and setal array (Q). P. KAIL−X−01−M28. Q. KAIL−GTBM−9−35M−01−W29. R, S. Complex forms of unknown affinity. R. KAIL− 05−03−U21. S. KAIL−05−01−F35. Scale bars: A–P, S 100 µm; Q, R 50 µm; G 2 40 µm.

Fig. 2 in Burgess Shale-type microfossils from the middle Cambrian Kaili Formation, Guizhou Province, China

Fig. 2. Biomineralizing taxa preserved as small carbonaceous fossils (NIGP 153954–153961) from the middle Cambrian Kaili Formation, Guizhou, China. A. Hyolithid helen (A1), with detail of rounded proximal end (A2), KAIL−BP−01−J38. B. Multi−rayed chancelloriid sclerite, KAIL−A−01−P39. C−E. Single−rayed or disarticulated chancelloriid sclerites. C. KAIL−GTBM− 9−2−b−E39. D. KAIL−05−05−O17 (image reversed). E. KAIL−09−01−U19. F–H. Brachiopod fragments (F1, G1, H1), with details of microstructure (F2, G2, G3, H2). F. KAIL−07−01−U38. G. KAIL−05−05−E17. H. KAIL−GTBM− 9−2−d−K41. Scale bars: A1, B–E 200 µm; A2 40 µm; F1 400 µm; F2 125 µm; G1 250 µm; G2 125 µm; G3 60 µm; H1 500 µm; H2 150 µm.

Fig. 4 in Burgess Shale-type microfossils from the middle Cambrian Kaili Formation, Guizhou Province, China

Fig. 4. Pterobranch periderm (NIGP 153978–153979) from the middle Cambrian Kaili Formation, Guizhou, China. A. KAIL−BP−01−N23. B. KAIL−A− 01−R36. A2 is a photographic detail of A1; A3 and B2 are camera lucida drawings highlighting the fusellar microstructure, including characteristic oblique sutures developed locally in a "zig−zag" arrangement. Scale bars: A1 200 µm; A2, A3 100 µm; B1, B2 400 µm.

Fig. 1 in Burgess Shale-type microfossils from the middle Cambrian Kaili Formation, Guizhou Province, China

Fig. 1. Filaments and acritarchs (NIGP 153940–153953) from the middle Cambrian Kaili Formation, Guizhou, China. A–G. Cyanobacterial filaments. A–C. Eomicrocoleus Horodyski and Donaldson, 1980/Siphonophycus Schopf, 1968 emended Knoll, Swett, and Mark, 1991 with multiple cellular trichomes enclosed within a common sheath (in C, a double sheath). D,E,G. Siphonophycus spp. exhibiting a variety of growth forms. F. Polytrichoides Hermann, 1974 emend. Knoll, Swett, and Mark, 1991. A. KAIL−04−03−L44. B. KAIL−05−02−V31. C. KAIL−05−05−D13. D. KAIL−GTBM−9−35M−01−T45. E. KAIL− GTBM−9−37M−01−J23. F. KAIL−A−01−K26. G. KAIL−GTBM−9−2−b−M37. H, I. Filaments of uncertain affinity. H. KAIL−GTBM−9−35M−01−E44. I. KAIL− 09−01−H12. J–N. Acritarchs, including forms with medial splitting (K, L) and possible vegetative colony growth (M). J. KAIL−A−01−O25. K. KAIL− 04−05−T17. L. KAIL−04−05−G17. M. KAIL−GTBM−2−9−c−D21. N. KAIL−GTBM−9−2−d−S14. Scale bars A–F, J–L 200 µm; G–I 400 µm; M, N 100 µm.

Fig. 4 in A Marrella-like arthropod from the Cambrian of Australia: A new link between "Orsten"-type and Burgess Shale assemblages

Fig. 4. Localities, in which Marrellomorpha (sensu Kühl et al. 2008) have been found. 1, Monastery Creek Phosphorite Formation, Late Templetonian– Early Floran, Australia: Austromarrella klausmuelleri gen. et sp. nov. 2, Kaili, early middle Cambrian, China: Marrella sp. (Zhao et al. 2003). 3, Burgess Shale, middle Cambrian, British Columbia, Canada: Marrella splendens Walcott, 1912 (Whittington 1971; García−Bellido and Collins 2006). 4, Fezouata biota, Ordovician, Morocco: Furca spp. (Van Roy 2006a, b; Van Roy et al. 2010). 5, Letná Formation, Ordovican, Czech Republic: Furca bohemica Fritsch, 1908 (Chlupáč 1999; Van Roy 2006a, b; Rak 2009; Rak et al. 2013). 6, Herefordshire, Silurian, England: Xylokoris chledophilia Siveter, Fortey, Sutton, Briggs and Siveter, 2007 (Siveter et al. 2007). 7, Hunsrück slate, Lower Devonian, Germany: Vachonisia rogeri Lehmann, 1955 (Kühl et al. 2008); Mimetaster hexagonalis Gürich, 1931 (Kühl and Rust 2010). Table indicates occurrences.

Fig. 3. Marrellomorph Marrella splendens Walcott, 1912 in A Marrella-like arthropod from the Cambrian of Australia: A new link between "Orsten"-type and Burgess Shale assemblages

Fig. 3. Marrellomorph Marrella splendens Walcott, 1912, for comparison with Austromarrella klausmuelleri gen. et sp. nov., Mount Murray, Western Queensland, Australia; Series 3 of the Cambrian. A. Dorsal view on a rendered 3D model, based on own observations. B–E. Micrographs under polarized light. B. Beautifully preserved specimen USNM 83486f with the exopods in a "rusty" preservation (cf. García−Bellido and Collins 2006). C. Stereo image of specimen USNM 139665. Exopods of preceding limbs are super−imposing each other, separated by a thin layer of sediment. D. Detail of specimen ROM 56766A in "rusty" preservation. Here the spines on the lateral side of the exopod ringlets are well preserved. E. One of the smallest specimens of M. splendens USNM 219817e that possesses preserved appendage remains. The single fragmentary specimen of A. klausmuelleri could, based on its size, belong to an entire specimen of a comparable size.

Fig. 1 in A Marrella-like arthropod from the Cambrian of Australia: A new link between "Orsten"-type and Burgess Shale assemblages

Fig. 1. SEM images of the holotype and single specimen CPC 30719 of marrellomorph Austromarrella klausmuelleri gen. et sp. nov., Mount Murray, Western Queensland, Australia; Series 3 of the Cambrian. A. Median or lateral view, exposing the more or less lanceolate lamellae. B. Anterior or posterior view. The 16 ringlets are well separated from each other. Letters indicate the direction of view in images D–F. C. Median or lateral view, opposing to side displayed in A. Here the insertion of the most proximal preserved ringlet is well apparent. D–F. Details of the stout spines on the most distal preserved annuli viewed as indicated in image B. D. View from latero/medio−proximal on the distal tip. E. View from lateral/median, same spine as in D. F. View from medio/latero−proximal. Spine on the other side of the same ringlet as in D and E.

Fig. 2 in A Marrella-like arthropod from the Cambrian of Australia: A new link between "Orsten"-type and Burgess Shale assemblages

Fig. 2. Examples of multi−annulated exopods of fossil and extant representatives of the taxa Agnostina and Crustacea sensu lato. A. SEM image of the exopod of the second head appendage of Agnostus pisiformis (Wahlenberg, 1818) composed of nine articles. Each of the six distal articles bears a pair of long, outwardly directed setae, a short spinule close to the base of the setae and a short seta opposite of the long setae (cf. Müller and Walossek 1987: pl. 18.1). Series 3 of the Cambrian (Agnostus pisiformis Zone), UB 832. B. SEM image of appendages two and three of a stage two larva of the fossil micro−predator Goticaris longispinosa Walossek and Müller, 1990. Series 3 of the Cambrian (Agnostus pisiformis Zone), UB 98. Detail of pl. 2.5 of Haug et al. (2009b). C. SEM image of the appendages two to four of the phosphatocopine Vestrogothia spinata Müller, 1964, Furongian, Cambrian, UB 622. D. Light microscopic image (processed according to Haug et al. 2009a) of a putative thecostracan larva (E_G2010_16_2_1), from the Devonian Windyfield Chert (cf. Fayers and Trewin 2004). E. Composite fluorescence image (cf. Haug et al. 2008) of an undetermined natant decapod from the Solnhofen Lithographic Limestones, Upper Jurassic, Southern Germany (SMNS 70149, ex coll. Gebert, Iphofen). F. SEM image of the second antenna of the Recent mystacocarid Derocheilocaris remanei Delamare−Deboutteville and Chappuis, 1951 (cf. Olesen 2001; Haug et al. 2011). Specimen from the collection of the Zoological Museum, Copenhagen. G. SEM image of a pleomeric segment with a pair of pleopods of the Recent amphipod Gammarus roeselii Gervais, 1835. Image courtesy Gerd Mayer, Ulm.