Rusophycus. Cruziana and Rusophycus are commonly assumed to be tri...

Species: Rusophycus & Cruziana Age: Ordovician Location: Erfou

25 de set. de 2023 ... ... Rusophycus clavatus. Descripción. Rusophycus. Icnofósiles presentes en rocas sedimentarias de facies marina profunda, marina superficial ...Regional presence of Rusophycus avalonensis Zone in Backbone Ranges Formation and of Fallotaspis and Nevadella zones in lower Sekwi Formation: MacNaughton et al. (2021) Vampire Formation: Central Mackenzie Mountains, Northwest Territories, Canada: Lower shoreface to upper offshore: Cambrian Age 2: Presence of the Rusophycus avalonensis and ...The oldest certain panarthropod fossil taxon is the trace Rusophycus, which is geochronologically constrained to a minimum of 528.82 Ma (Wolfe et al. 2016) and is estimated to occur up to a maximum of c. 537 Ma, in the Fortunian Stage of the Cambrian (Daley et al. 2018). As such, our joint posterior estimate for crown-group Panarthropoda ...Cruziana cf. problematica and Rusophycus carbonarius are present in very-fine to fine-grained sandstone layers interbedded with dropstone-bearing mudstone in the lower section of the middle interval. These deposits record the interplay of suspension fall-out sedimentation, ice-rafting, rain-out processes, and storm waves.The Piedras Estuary (located between the municipalities of Lepe and Cartaya) constitutes a lagoon (Fig. 1 B) with a progradational trend as a response to the progressive reduction of the tidal prism, which is caused by the advanced stage of sediment infilling of the estuary (Morales et al., 2001).The marine side of this estuary is characterized by a …Fig. 1. Dated time tree of Cambrian trilobites inferred from tip-dated Bayesian analyses of discrete, meristic, and continuous traits under a multiepoch clock, which allows rates of evolution to vary across time slices. Evolutionary rates for discrete, meristic, and continuous traits were very constant across the early, middle, and late Cambrian.Rusophycus avalonensis Zone extends through the balance of the subtrilobite Cambrian and is characterized by the advent of numerous complex burrows, including arthro-pod-produced traces (e.g., Rusophycus, Cruziana, Dimor-phichnus). Crimes (1992b) tabulated at least 25 ichnogen-era that first appear in this interval.Rusophycus Hall, 1852 in white and Planolites in black (LPP Ic-174). Scales: 2 cm. Images A and D: Raniel Canuto. Ichnofossils are commonly found in the state of Piauí, but systematic studies are scarce, such as in the region of Picos, where according to Dentzien-Dias et al. (2011) the subject is poorly investigated. These ichnofossils reflect ...Rusophycus is a trace fossil ichnogenus allied to Cruziana. Rusophycus is the resting trace, recording the outline of the tracemaker; Cruziana is made when the organism moved. [2] The sculpture of Rusophycus may reveal the approximate number of legs that the tracemaker had, although striations (scratchmarks) from a single leg may overlap or be ...B3: Rusophycus. See also Clarkson (1998, fig. 11.15b) and PaleoBase 1.0. Rusophycus is often described as a trilobite resting trace. What is the stratigraphic range of Rusophycus? What other organisms could have made Rusophycus? Rusophycus traces were also produced by trilobites digging for prey (see papers by Jensen [1990] and Brandt et al ... Left: A Grallator track from the Jurassic of Utah (UCM 179.10/US Bureau of Land Management specimen). 1 Tracks called Grallator isp. were probably made by several different species of theropod dinosaurs. Right: Most Cruziana isp. (top) and Rusophycus isp. (bottom) traces were probably made by trilobites. Note that the abbreviation "isp." signifies an unnamed ichnospecies, or trace fossil species.Rusophycus carbonarius (Dawson, 1864), Fig. 5A: Traces consist of isolated, symmetrical, bilobate, ovoid, round to rectangular forms in concave epirelief displaying a medial furrow with transverse ...Two specimens of the trace fossil Rusophycus bilobatus from the Silurian Rose Hill Shale of Scott County, Virginia (PRI 76851). These resting traces were likely made by trilobites. Specimen is from the research collections of the Paleontological Research Institution, Ithaca, New York. Longest dimension of rock is approximately 13.5 cm. Model by Emily Hauf.Conversely, the overall morphology of ichnogenera Cruziana D'Orbigny, 1842, Rusophycus Hall, 1852 and Didymaulichnus Young, 1972 has more diagnostic features in common with both morphotypes. Among them, the two elongate ichnotaxa interpreted as locomotion traces, i.e. Cruziana and Didymaulichnus , share more similarities with ‘morphotype A ...This is a nice example of the Rusophycus pudicum, the rest of the Flexicalymene meeki. From the Waynesville Formation, Warren County, Ohio. T are three rest on this limestone, measures 2 1/2" x 2 1/2". Items in the Price Guide are obtained exclusively from licensors and partners solely for our members' research needs.Rusophycus these are approximately equal. Cruziana was named by the French paleobotanist . Alcide d'Orbigny in 1842 in honor of the . general and politician Andrés de Santa-Cruz y .A G I A N T RUSOPHYCUS FROM THE ARISAIG GROUP (SILURO-DEVONIAN) OF NOVA SCOTIA. y. Tansathien and R.K. P ic k e r ill Department of Geology, U niversity of New Brunswick Fredericton, New Brunswick, E3B 5A3. Date Received October 16, 1986 Date Accepted December 24, 1986.Download scientific diagram | -Cross-sectioned specimen of Rusophycus from PR1. Arrows point to cross-bedding within specimen. Scale bar is 1 cm. CMC IP60435. from publication: Sedimentary ...Abstract. Eozoon canadense, 'the dawn animal of Canada', a large foraminifera, was announced in 1864 as the oldest fossil organism known. Camps soon formed into disbelievers of its fossil nature, agnostics, and "Eozoonists". Eozoon would number among its proponents major figures of the time. The saga of Eozoon, or more precisely the dispute ...Such interactions are preserved in recurring associations of the ichnogenera Rusophycus and Cruziana, most commonly attributed to trilobites, with burrows of likely vermiform (worm-like) organisms. In this study, we examine the Cambrian (Furongian Epoch, Steptoean Stage) Davis Formation, near Leadwood, southeastern Missouri, USA.Download scientific diagram | Indiana specimen with individual Rusophycus outlined and arrows indicating anterior direction. Scale in mm. from publication: A Curious Rusophycus (Arthropod ...1. To clarify the type locality of the Fort Mountain Formation, Desjardins et al. (2010b Desjardins, P. R., Pratt, B. R., Buatois, L. A., and Mángano, M. G. 2010b.Stratigraphy and sedimentary environments of the Lower Cambrian Gog Group in the southern Rocky Mountains of Western Canada: Transgressive sandstones on a broad …Rusophycus is known from the Bayan - Gol Formation of Mon- golia (Goldring & Jensen 1996), within the Tiksitheca licis zone and bracketed between isotopic features D and E, a stratigraphicalNPS photo/A. Miller: Possible trilobite trace makers of Rusophycus. These trilobites are identified as Glossopleura mckeei from the Bright Angel Shale...Oct 25, 2004 · Note the preservation of Rusophycus leifeirikssoni as a full relief structure (arrow) and associated synaeresis cracks. Intertidal mixed flat. Angosto del Morro de Chucalezna. Coin diameter=2.3 cm ... Rusophycus isp. 39 3 42. Scolicia isp. 3-3. Skolithos isp. 8-8. Zoophycus isp. 14-14. Bioturbação 34-34. Icnofósseis indeterminados 224-224. T otal 427 10 437. DISCUSSÃO.Neoichnological study and comparison of these bioturbation structures with the fossil record allow associating them as Cruziana- and Rusophycus-like traces, i.e. traces with features very similar to those of such ichnogenera. Since these ichnotaxa have been commonly interpreted as the result of the locomotion and resting of different kinds of ...Trace fossils are abundant in the clastic succession throughout the Shirgesht Formation of Kalmard Block, Central Iran. At certain horizons there are beds full of Cruziana and Rusophycus. This study presents an evaluation of the arthropod ichnotaxa of the Cruziana and Rusophycus from the Ordovician succession Shirgesht Formation. Apart from the broad range in morphology and size, Cruziana from ...PDF | The ichnogenus Rusophycus includes a wide range of short bilobate excavations generally attributed to variable feeding behaviors of arthropods,... | Find, …Arthrophycus brongniartii (Harlan, 1832) is common in marginal-marine deposits in the Silurian Red Mountain Formation of Alabama. The ichnospecies, the second to be named in North America, is revived and emended after long disuse. Transitional forms to Rusophycus isp. and other morphologic evidence indicate that the maker of Arthrophycus was an arthropod, perhaps a trinucleine (raphiophorid?) trilThe proverse direction of leg marks in the anterior and long, deep endopodal scratches make Form A strikingly similar to the Upper Cambrian or possibly lowermost Ordovician (Seilacher 2007) Australian Rusophycus latus Webby, a rusophyciform version of the Upper Cambrian Omani Cruziana omanica (Seilacher).A specimen of the trilobite-produced trace fossil Rusophycus is intimately associated with the annelid-produced meandering burrow Helminthopsis hieroglyphica on the upper surface of an amalgamated quartz arenite of the King Square Formation (late Middle - early Late Cambrian), Saint John Group, southern New Brunswick. Observations suggest that the rusophycid reflects, and is a rather unusual ...The striking trace fossil Cruziana d'Orbigny 1842 and its companion Rusophycus Hall 1852 are bilobate structures long regarded as dominantly made by trilobites, indicating respectively plowing and ...Trilobite Cruziana (Trackway) & Rusophycus (Resting Spot) - Morocco This is a cool plate with two arthropod trace fossils, likely trilobite, from near Erfoud, Morocco. This Cruziana is a 2.7" trackway preserved in a slab of mudstone and would be Ordovician in age or approximately 450 million years old. There is also a rusophycus or resting spot ...Rusophycus moyensis n. isp. en la transición cámbrica-tremadociana del noroeste argentino: implicancias paleoambientales y bioestratigráficasRusophycus moyensis es morfológicamente cercano a Rusophycus polonicus, una traza fósil de trilobites, de edad cámbrica tardía a '?tremadociana, conocida del norte de Gales y Polonia. Las diferencias morfológicas con Rusophycus polonicus no pueden ser totalmente explicadas en función de factores tafonómicos oThese ichnofossils (trace fossils) show a snapshot of life 445 million years ago. Rusophycus (Trilobite resting nest), Cruziana (trackways furrowing/emerging), & Diplichnites (walking/striding) ichnofossils - trace fossils - are all present on the various plates. Even some non-trilobite tracks on a couple - worms and even other arthropods.These trace fossils, called Rusophycus, were made by trilobites digging straight down into the muddy bottom. The holes they left were filled in by sand. That's why the tracks sometimes look upside down. They're actually sand casts of the tracks. The trilobite dug into the mud layer from side to side with its legs. This left a set ofMedia in category "Rusophycus". The following 13 files are in this category, out of 13 total. Abyssal Trilobite 0008.JPG 3,072 × 2,304; 2.78 MB. CambrianRusophycus.jpg 4,000 × 3,000; 3.74 MB. Cruziana e Rusophycus.jpg 934 × 903; 218 KB."Taphocoenoses of the Pimenteira Formation, Devonian of the Parnaíba Basin, State of Piauí: Mapping, Inventory and Heritage Relevance During fieldwork conducted in the last ten years along the eastern border of the Parnaíba Basin in the State of Piauí, the continuous destruction of fossiliferous outcrops of the Pimenteira Formation has been observed and is clearly a matter of concern.Flexicalymene from Morocco. Flexicalymene Shirley, 1936. is a genus of trilobites belonging to the order Phacopida, suborder Calymenina and Family Calymenidae. Flexicalymene specimens can be mistaken for Calymene, Gravicalymene, Diacalymene and a few other Calymenina genera. They are used as an index fossil in the Ordovician.Ohio and North America are particularly known for being rich with ...Abstract. Euarthropoda is one of the best-preserved fossil animal groups and has been the most diverse animal phylum for over 500 million years. Fossil Konservat-Lagerstätten, such as Burgess Shale-type deposits (BSTs), show the evolution of the euarthropod stem lineage during the Cambrian from 518 million years ago (Ma).INTRODUCTION ThelargequarryatWiśniówkaWielkahill,Holy Cross Mountains, central Poland, is an important localityforthestudyofFurongian(UpperCambrian)A while back we had an interesting discussion about a horseshoe crab fossilized with its death trail. Typically specimens like this were named giving the ichnospecies priority over the maker. According to Osgood 1970, this spectacular fossil is one of only 3 known examples of Flexicalymene meeki ...The trace fossil Rusophycus cf. cryptolithi Osgood, 1970 from the Letná Formation (Ordovician, Sandbian) of the Barrandian area is interpreted as a feeding- ...Trace fossils (Rusophycus) and preserved gut contents show that a number of polymerids were carnivores and that worms were one form of prey (e.g. Jensen 1990; Brandt et al. 1995; ...1. To clarify the type locality of the Fort Mountain Formation, Desjardins et al. (2010b Desjardins, P. R., Pratt, B. R., Buatois, L. A., and Mángano, M. G. 2010b.Stratigraphy and sedimentary environments of the Lower Cambrian Gog Group in the southern Rocky Mountains of Western Canada: Transgressive sandstones on a broad continental marginThe association of the olenid trilobite Leptoplastides marianus (Hoek) and Rusophycus isp. A from the Upper Tremadocian levels of the Eastern Cordillera of Argentina is described and analysed. By means of the application of several parameters involving different aspects of the association, Leptoplastides marianus (Hoek) is proposed as the most probable producer of Rusophycus isp. A. Sampled ...Rusophycus is a trace fossil ichnogenus allied to Cruziana. Rusophycus is the resting trace, recording the outline of the tracemaker; Cruziana is made when ...Rusophycus carleyi (James, 1885 James, J. F. 1885. The fucoids of the Cincinnati Group, Pt. 2. Journal of the Cincinnati Society of Natural History, 7:151-166.) is an ichnospecies that ...(b) Resting burrow, Rusophycus morgati Baldwin, Armorican Sandstone (Floian) from the Armorican Massif, western France, interpreted as made by the trilobite Ogyginus 14, IGR-114954.Rusophycus dispar intimately associated with teichichnian- type burrows from the Lower Cambrian of Sweden, and Brandt et al. (1995) R. carleyi mutually associated with Palaeophycus from the Ordovician of Ohio. Other possible examples, though not fully described or discussed in detail by their respective authors, include those of Martinsson ...Rusophycus is a relatively short, bilobed trace. Each lobe commonly has subhorizontal markings. This ichnofossil is commonly found as a convex form on the bottom of beds. Rusophycus is a very distinctive trace, but it may be confused with the longer bilobed trace known as Cruziana.17 de nov. de 2022 ... Rusophycus. trace fossil. In more languages. Spanish. Rusophycus. Icnogénero. Traditional Chinese. No label defined. No description defined.Rusophycus are created when a trilobite is stationary upon loose substrate. In filter-feeding trilobites such as Cryptolithus, the movement of limbs under the circular cephalic shield create distinctive trace fossils that mark this kind of feeding behavior, called Rusophycus cyptolithi. You can learn more about this in the section on Trilobite ...Rusophycus avalonensis ichnozones (e.g. Narbonne et al., 1987; Buatois and Mángano, 2011). In successions dominated by s il c a trok henz mp fd y g Terreneuvian Series. In the area of the basal ...class (2).—II. ' On the Fossils of the Genus Rusophycus' by Dr. Daw-son. This genu was establishes bdy Prof Hal. fol certair n trans-versely wrinkled impressions foun in rockd s of the ' Clinton Grou 'p (Middle Silurian o)f New York, and supposed to be fossil Sea-weeds. Similar object ars e described by Mr. Billings from the Chazy Sand-Resting trace of a trilobite (Rusophycus), with a small part of its trackway leading to the trace, in the Upper Ordovician Sequatchie Formation of northwest Georgia. These trace fossils are preserved as natural casts on the bottom of a sandstone, so you're seeing the underside of where the trilobite hunkered down more than 400 million years ago.Download scientific diagram | More arthropod-like traces. (A) Dimorphichnus with other traces, point N2. (B) Monomorphichnus bilinearis showing large scratch marks arranged in pairs, point N2. (C ...The median depression in some representatives of the ichnogenus Rusophycus (some Australian and Bolivian forms of the ichnospecies R. latus) (Webby, 1983; Davies et al., 2007) is not rectilinear and is extremely poorly expressed in relief. Genus composition. Two subgenera: Rusophycus Hall and new ichnosubgenus Rusophycus (Hemisphaerichnus ...Cruziana and Rusophycus are commonly assumed to be trilobite trace fossils, although associated exoskeletons are almost invariably absent from host strata. In the lower Cambrian Dallas Bugt Formation of Ellesmere Island, Arctic Canada, high-energy, cross-laminated sandstones locally with dense populations of large Skolithos are overlain by thin-bedded, bioturbated, argillaceous, medium-grained ...Rusophycus isp. Estructura de reposo creada por un artrópodo (Trilobites) en un ambiente estable de baja a moderada energía conservada en cuarcita en forma de hiporrelieve convexo. Numero de Registro: MGUV 4766 Edad: Ordovícico Localidad: La Rebosilla (Teruel, España) Clasificación etológica: Cubichnia (Bioturbación) Icnofacies: Cruziana Técnica: fotogrametría Procesado: Photoscan ...Isopodichnus is an ichnogenus of trace fossil. Ribbon-like in form, Isopodichnus traces were likely formed by the activity of an isopod crustacean foraging within the preserved sediment. Parallel to the bedding plane, a central furrow is flanked by two hypichnial ridges. Trails may also exhibit scratch marks and be associated with Rusophycus-like resting traces. Isopodichnus are very similar ...Deep-Water Marine Rusophycus and Cruziana from the Ordovician Stratinomic Indications by Trace Fossils in Eocene to Miocene Turbidites and Hemipelagites of the Northern Apennines (Italy) Abundance and Morphology of Paleodictyon Nodosum, Observed at the Clarion-Clipperton ZoneRusophycus is an ichnogenus comprising shallow burrows generally attributed to trilobites and other arthropods. The paleoethological interpretation of these structures is not conclusively known ...Isopodichnus is an ichnogenus of trace fossil. Ribbon-like in form, Isopodichnus traces were likely formed by the activity of an isopod crustacean foraging within the preserved sediment. Parallel to the bedding plane, a central furrow is flanked by two hypichnial ridges. Trails may also exhibit scratch marks and be associated with Rusophycus ...The appearance of Granomarginata approximates the base of the overlying Rusophycus avalonensis Ichnozone. Common process-bearing acritarchs, represented by small Asteridium and Comasphaeridium, first appear in the middle of the overlying Random Formation, and a more diverse acritarch assemblage at its top. The Random Formation also yields small ...The tracemakers of both Cruziana and Rusophycus are bilaterally symmetrical organisms, most probably arthropods (Donovan, 2010). In Paleozoic strata, they occur exclusively in marine deposits and ...excellent trilobite resting burrow rusophycus with crawling trail or cruziana leading out of the burrow!! from the silurian of virginia. beautiful detail even showing traces of the legs! 430 million y...from 1137946351Although Rusophycus and Cruziana (that probably represent morphological end-members of deep resting and locomotion/ grazing traces: Kesidis et al. 2019b) are often referred to the activity of ...Cruziana and Rusophycus are commonly assumed to be trilobite trace fossils, although associated exoskeletons are almost invariably absent from host strata. In the lower Cambrian Dallas Bugt Formation of Ellesmere Island, Arctic Canada, high-energy, cross-laminated sandstones locally with dense populations of large Skolithos are overlain by thin-bedded, bioturbated, argillaceous, medium-grained ...These trace fossils, called Rusophycus, were made by trilobites digging straight down into the muddy bottom. The holes they left were filled in by sand. That's why the tracks sometimes look upside down. They're actually sand casts of the tracks. The trilobite dug into the mud layer from side to side with its legs. This left a set ofThe proverse direction of leg marks in the anterior and long, deep endopodal scratches make Form A strikingly similar to the Upper Cambrian or possibly lowermost Ordovician (Seilacher 2007) Australian Rusophycus latus Webby, a rusophyciform version of the Upper Cambrian Omani Cruziana omanica (Seilacher).Rusophycus Rindsberg, Citation 1994, p. 39 (but not cumulative synonymy therein). Type Species. R. > Rusophycus Rindsberg, Citation 1994, p. 39. Diagnosis. Bilaterally symmetrical shallow structure, longer than wide, with deep median furrow (in hypichnial preservation), and with anterior and posterior parts distinguished by structure and ... Download scientific diagram | A-C-Rusophycus ispp., lower Cam brian, Ociesęki Sand stone For ma tion, Holmia-Schmidtiellus Zone Pos i tive hyporeliefs on thin beds of quartz arenite; A-Rusophycus ...In addition to Arthrophycus, several other types of trace fossils are reported in the Tuscarora Fm.; specifically Cruziana, Monocraterion, Planolites, and Rusophycus (Cotter, 1983). Trace fossils such as these aid geologists in synthesizing paleoenvironmental interpretations for geologic units, including coastal configuration, water depth, and ...Michał STACHACZ Stachacz M. (2012) -New finds of Rusophycus from the lower Cam brian Ociesęki Sand stone For ma tion (Holy Cross Moun tains, Poland). Geol. Quart., 56 (2): 237-248, doi: 10.7306/gq.1018English: Rusophycus trace fossil from the Ordovician of southern Ohio. Scale bar is 10 mm. Date: 19 August 2008: Source: Own work: Author: Wilson44691: Photograph taken by Mark A. Wilson (Department of Geology, The College of Wooster). Licensing . Public domain Public domain false false:All photographs are of latex casts taken from specimens of Rusophycus cryptolithi Osgood, in the University of. Cincinnati Geology Museum, and collected from ...Posted November 28, 2022 (edited) I found the following fossils hunting the Nicolet River Formation (Upper Ordovician). The layer where the specimens are is really friable, which makes them really fragile to remove, so I will have to remove a large piece of rock as a support. They measure approximately 2 and 1 inches respectively.Rusophycus leifeirikssoni is directly associated with vertical worm burrows (e.g. Skolithos linearis , Syringomorpha ispp.), it is difficult to find strong support for RusophycusCruziana and Rusophycus are commonly assumed to be trilobite trace fossils, although associated exoskeletons are almost invariably absent from host strata. In the lower Cambrian Dallas Bugt ...Rusophycus is a rare exception as it is a trace fossil that is typically assigned to a trilobite tracemaker. However, this does not exclude other arthropods ...Rusophycus carleyi (J. F. James); cast of trilobite trace intersecting Palaeophycus-like trace. Anterior direction is toward the left; casts of genal spines, pygidial and cephalic doublures, and ...The overlying zone is referred to as the Rusophycus avalonensis zone and contains the oldest bilobate, trilobite-type resting traces (R. avalonensis) together with the bilobate epichnial trail "Taphrelminthopsis" circularis (Jensen et al., 2006). The age of this zone ranges from the Fortunian to Cambrian Stage 2.Buatois, L.A.; Guinea, F.M.niz. 2002: Rusophycus moyensis n isp in the Cambrian-Tremadocian transition of northwest Argentina paleoenvironmental and biostratigraphic implications Rusophycus moyensis n isp en la transicion Cambrica-Tremadociana del noroeste argentino implicancias paleoambientales y bioestratigraficas Revista Brasileira de ...Name: Rusophycus/Cruziana Specimen: Resting/Feeding activity trace of a Trilobite Age: Ordovician Location: Morocco Size (picture scale cube=1cm): 160 x 45 x 176mm (6.3 x 1.77 x 6.93 inches) Rusophycus is the resting/feeding activity trace of the once present animal, recording the outline of the tracemaker, in this case the Trilobite.Feb 27, 2008 · The Rusophycus ichnocoenosis is recorded from the Low Energy Floodplain Facies based on the high numbers of repichnia (crawling or walking traces, e.g., Cruziana) and cubichnia (resting or nesting traces, e.g., Rusophycus), and the shallow fluvial environment dominated by siltstone (Garvey, 2005). . These trace fossils, called Rusophycus, were made by trilobiteFile: Rusophycus (trilobite burrow) (Ordovician-Silurian boundar We could not help but be delightfully distracted by these brilliant trace fossils in the rocks along the lake shore. The bilobed structure which looks like a deer footprint is an excavation made by a trilobite -- the trace fossil itself is called Rusophycus. The sinuous tubes are trails made by burrowing worms. Download scientific diagram | Rusophycus isp. from Nov 4, 2022 · Arthropod traces from the Terreneuvian such as Rusophycus have been attributed to trilobites 34 (despite appearing c. 10–15 million years prior to the first appearance of the group 35), although ... Rusophycus. Rusophycus pudicum SMH collection. Species. Rusophycus carleyi (James, 1885) Occurrence: Fulton, Economy, Southgate, McMicken Reference: Osgood, 1970 ... Oct 25, 2004 · Note the preservation of Rusophycus leifeir...

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