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Registros recuperados: 29
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A crinoid crown from the Wenlock (Silurian) of Coalbrookdale, Shropshire, England Naturalis
Donovan, S.K.; Lewis, D.N..
The specific diversity of fossil crinoids from the Much Wenlock Limestone Formation at Dudley, Worcestershire, and in Shropshire differ by an order of magnitude. The latter are relatively depauperate and include only about six nominal species. Over 165 years ago, a specimen from Coalbrookdale, Shropshire, was identified as Cyathocrinites tuberculatus Miller (= the taxocrinid flexible Protaxocrinus tuberculatus (Miller)). This specimen, although indifferently preserved, is distinct from other Silurian crinoids of the British Isles and is described herein as a monobathrid camerate, Macrostylocrinus? jefferiesi sp. nov. This species has a moderately large, conical dorsal cup with at least 20 arms, broad primibrachials, a granular surface sculpture and no ray...
Tipo: Article / Letter to the editor Palavras-chave: Systematics; Crinoids; Macrostylocrinus; Wenlock; Silurian; England; 42.72; 38.22.
Ano: 2008 URL: http://www.repository.naturalis.nl/record/314207
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A Derbyshire screwstone (Mississippian) from the beach at Overstrand, Norfolk, eastern England Naturalis
Donovan, S.K..
A distinctive chert erratic pebble found on the beach at Overstrand, north Norfolk, eastern England, is a Derbyshire screwstone. Such cherts are typical of the Mississippian (Lower Carboniferous) limestones of the southern Pennines (White Peak), over 200 km to the northwest. It was most probably transported by fluvial or glacial action during the Pleistocene and was recently disinterred by coastal erosion. The most diagnostic feature of screwstone cherts are the included mouldic crinoid ossicles, particularly columnals. Columnals of the monobathrid camerate crinoid Megistocrinus? globosus? (Phillips) are described from this screwstone; these have a circular outline, central pentagonal lumen and a raised perilumen. The uncertainty of the identification is...
Tipo: Article / Letter to the editor Palavras-chave: Beachcombing; Provenance; Neogene; Carboniferous; Megistocrinus; 38.10.
Ano: 2010 URL: http://www.repository.naturalis.nl/record/361971
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A field guide to the Silurian Echinodermata of the British Isles: Part 1 - Eleutherozoa and Rhombifera Naturalis
Lewis, D.N.; Donovan, S.K.; Crabb, P.; Gladwell, D.J..
The Palaeozoic echinoderms of the British Isles are most diverse in the Silurian and Lower Carboniferous. This guide discusses and illustrates members of all major groups of echinoderms, apart from the crinoids, from the Silurian of these islands. Groups considered include the echinoids (five taxa), ophiuroids (ten taxa) and asteroids (thirteen taxa), and the extinct ophiocistioids (three species) and rhombiferan cystoids (nine species).
Tipo: Article / Letter to the editor Palavras-chave: Echinoderms; Silurian; British Isles; Echinoids; Asteroids; Ophiuroids; Cystoids; Ophiocystitoids; 38.22; 42.72.
Ano: 2007 URL: http://www.repository.naturalis.nl/record/217414
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A new species of land crab, Sesarma Say, 1817 (Decapoda, Brachyura), from the Pleistocene of Jamaica Naturalis
Collins, J.S.H.; Mitchell, S.F.; Donovan, S.K..
Terrestrial arthropods are poorly known from the Cenozoic of Jamaica. A probably Late Pleistocene land crab, Sesarma primigenium sp. nov., is described from the Western Cement Company Cave, parish of St. Elizabeth, southwestern Jamaica. The same species is also tentatively recognised from the Late Pleistocene Red Hills Road Cave, parish of St. Andrew, eastern central Jamaica. The propodi of the new species are moderately globose, with an upper margin that is comparatively short and finely granulate ridged; the fingers are obscurely spooned and gaped; and the in-turned fixed finger is in line with, and a litt le shorter than, the basal margin. Of the nine extant endemic members of this subgenus in Jamaica, S. jarvisi Rathbun and S. verleyi Rathbun have...
Tipo: Article / Letter to the editor Palavras-chave: Land crabs; Sesarma; Caves; Pleistocene; Jamaica; 42.74.
Ano: 2009 URL: http://www.repository.naturalis.nl/record/301550
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A Relative Potential Erosion Detection (PED) model for the upper Buff Bay catchment, parish of Portland, Jamaica: A Geographical Information System application Naturalis
MacGillivray, C.M.I.; Donovan, S.K..
This research introduces a Geographical Information Systems (GIS) model that predicts the location and relative susceptibility of humid subtropical hillslopes to sheetwash erosion. The extent of the erosion was based on the conservation potential of the existing vegetation cover. This is an original deductive and deterministic model (Potential Erosion Detection, PED) incorporating regionally applicable physical and land use factors thought to be influential. These were climate (agroclimatic zones), topography (aspect and slope angle), soil (texture, drainage, depth, aggregation), vegetation cover and land use (tillage activity). The study looked at surface erosion as a perceived problem in a post-colonial economy. The processes, cause and effect of...
Tipo: Article / Letter to the editor Palavras-chave: Jamaica; Buff Bay; Geographical Information Systems; IDRISI; Geomorphology; Soil; Erosion; 38.42.
Ano: 2007 URL: http://www.repository.naturalis.nl/record/217419
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A relative Potential Erosion Detection (PED) model for the upper Buff Bay catchment, parish of Portland, Jamaica: A Geographical Information System application Naturalis
MacGillivray, C.M.I.; Donovan, S.K..
This research introduces a Geographical Information Systems (GIS) model that predicts the location and relative susceptibility of humid subtropical hillslopes to sheetwash erosion. The extent of the erosion was based on the conservation potential of the existing vegetation cover. This is an original deductive and deterministic model (Potential Erosion Detection, PED) incorporating regionally applicable physical and land use factors thought to be influential. These were climate (agroclimatic zones), topography (aspect and slope angle), soil (texture, drainage, depth, aggregation), vegetation cover and land use (tillage activity). The study looked at surface erosion as a perceived problem in a post-colonial economy. The processes, cause and effect of erosion...
Tipo: Article / Letter to the editor Palavras-chave: 38.59.
Ano: 2007 URL: http://www.repository.naturalis.nl/record/317285
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A standardized method of describing fossils, using Echinoidea as an example Naturalis
Lewis, D.N.; Donovan, S.K..
The main purpose of a research paper in palaeontology, or any scientific discipline, is to spread information within the field. In this paper, suggestions are made concerning the structure and organisation of systematic palaeontological papers, using the Echinoidea as an example. A comprehensive table of echinoid morphological features is presented. It is intended that authors following these guidelines will be facilitated in writing research papers that enable expeditious retrieval of information.
Tipo: Article / Letter to the editor Palavras-chave: Systematics; Description; Echinoidea; 38.22; 42.72.
Ano: 2007 URL: http://www.repository.naturalis.nl/record/217417
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An additional record of Oichnus excavatus Donovan & Jagt from the Maastrichtian (Upper Cretaceous) of southern Limburg, The Netherlands Naturalis
Donovan, S.K.; Jagt, J.W.M..
A single example of Oichnus excavatus Donovan & Jagt, infesting the holasteroid echinoid Hemipneustes striatoradiatus (Leske), is reported from the upper Meerssen Member, Maastricht Formation (uppermost Maastrichtian), of the former Blom quarry, Berg en Terblijt, southern Limburg, The Netherlands. This is the first evidence that O. excavatus may be more widely distributed in the type area of the Maastrichtian than previously assumed. The embedment structure occurs just below the ambitus and close to the peristome, suggesting that the producing organism may have been ingesting detritus from the sea floor rather than filter feeding, the more usual interpretation of its behaviour.
Tipo: Article / Letter to the editor Palavras-chave: Embedment structure; Trace fossils; Oichnus; Echinoids; Hemipneustes; Maastrichtian; The Netherlands; 42.72.
Ano: 2005 URL: http://www.repository.naturalis.nl/record/210110
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Archaeocidaris M’Coy (Echinoidea) from the Carboniferous of Egypt Naturalis
Lewis, D.N.; Donovan, S.K..
Collections in museums usually have boxes of specimens which remain ‘undiscovered’ and yet which may be of importance or interest. The recent rediscovery of specimens of Archaeocidaris in the Nationaal Natuurhistorisch Museum, Leiden, from the Carboniferous of Egypt illustrates this point. These specimens were collected in 1938 by Dr. H.M.E. Schürmann (1891-1979), who had been a student of Professor J. Wanner (1878-1956), the noted expert on fossil echinoderms. The Egyptian Archaeocidaris plates include interambulacrals and radioles. These are closest to Archaeocidaris rossica (von Buch) from the Moscow area of Russia, although there are sufficient differences in radiole morphology to suggest that they are not necessarily conspecific.
Tipo: Article / Letter to the editor Palavras-chave: Systematics; Echinoids; Archaeocidaris; Carboniferous; Egypts; 42.72.
Ano: 2005 URL: http://www.repository.naturalis.nl/record/210114
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Cor Winkler Prins, the silent force Naturalis
Hoek Ostende, L.W. van den; Donovan, S.K..
Contents - Introduction - Son of a famous family - The student years - Curator and science manager - A brachiopod life - Acknowledgements - Principal scientific publications of Cor Winkler Prins Introduction Silent respect. It is the way the Cornelius Winkler Prins treated the world, and often the way that the world treated him. It is the silent man that is easily overseen, but, in our opinion, it is the modest scientist that should never be forgotten.
Tipo: Article / Letter to the editor Palavras-chave: Cor Winkler Prins; Geologist; Biography; 38.10.
Ano: 2010 URL: http://www.repository.naturalis.nl/record/361929
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Crustaceans of the upper Miocene August Town Formation of southeastern Jamaica Naturalis
Collins, J.S.H.; Donovan, S.K.; Stemann, T.A.; Blissett, D.J..
Crustaceans remain poorly known from the Miocene of Jamaica. Herein, we report three species from the upper Miocene August Town Formation of Fowl House Spring, parish of St. Thomas, southeast Jamaica; poorly preserved propodi of a mud shrimp, “Callianassa” sp.; the anterior part of the carapace of Mithraculus sp. aff. Mithraculus coryphe (Herbst); and the cirripede Tetraclita sp. cf. T. stalactifera (Lamarck). Mithraculus sp. aff. M. coryphe at Fowl House Spring considerably extends the stratigraphic occurrence of the genus in the Antillean region down into the Miocene. Hitherto, fossil T. stalactifera in the Caribbean was known from the Plio-Pleistocene of Curaçao and the Pleistocene of Venezuela.
Tipo: Article / Letter to the editor Palavras-chave: Jamaica; Miocene; Barnacles; Cirripedia; Crabs; Decapoda; 38.22.
Ano: 2010 URL: http://www.repository.naturalis.nl/record/361979
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Decapod crustaceans from the Neogene of the Caribbean: diversity, distribution and prospectus Naturalis
Collins, J.S.H.; Portell, R.W.; Donovan, S.K..
The Neogene decapod crustaceans are reviewed from Aruba, Bonaire and Curaçao, Anguilla, Barbados, Carriacou, Costa Rica, Cuba, Florida, Hispaniola (Haiti and Dominican Republic), Jamaica, Mexico, Panama, Puerto Rico, St. Kitts, Tintamare Island, Trinidad and Venezuela. The most widely distributed taxa, both stratigraphically and geographically, are callianassids and Calappa (both with easily identifiable dactyli), and portunids. The latter include eleven genera in the study area; of these, Callinectes, Euphylax and Portunus are known from the Miocene, Pliocene and Pleistocene of the Caribbean. The two occurrences of scleractinian-inhabiting crab faunas, the Lower Miocene Montpelier Formation of Jamaica and the Pleistocene Coral Rock of Barbados, show...
Tipo: Article / Letter to the editor Palavras-chave: Neogene; Caribbean; Crustacea; Decapoda; Crabs; Systematics; Biogeography; 42.74.
Ano: 2009 URL: http://www.repository.naturalis.nl/record/301552
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Dentaliids (Mollusca, Scaphopoda) from the type Maastrichtian, the Netherlands and Belgium Naturalis
Donovan, S.K.; Jagt, J.W.M..
Scaphopods remain poorly known from the type area of the Maastrichtian Stage in northeast Belgium and the southeast Netherlands. At least three species appear to be represented, but incomplete preservation (i.e., lack of shell material) hampers a detailed systematic treatment of most specimens. In museum collections, the name Dentalium nysti Binkhorst van den Binkhorst, 1861 (= D. binkhorsti Pilsbry & Sharp, 1898; non D. nysti d’Orbigny, 1852) is often used rather indiscriminately for both genuine scaphopods and internal moulds of serpulid worm tubes. Here, we describe and illustrate Antalis? binkhorsti, Fissidentalium? sp. 1 and Dentaliidae sp. indet., all of Maastrichtian age, as well as a late Campanian form, Fissidentalium? sp. 2.
Tipo: Article / Letter to the editor Palavras-chave: Cretaceous; Antalis; Fissidentalium; Serpulids; Systematics; 38.22; 42.73.
Ano: 2012 URL: http://www.repository.naturalis.nl/record/428929
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Eocene crabs (Crustacea, Brachyura) from Bonaire, Netherlands Antilles Naturalis
Collins, J.H.S.; Donovan, S.K..
Recently discovered crabs from the Middle to Upper Eocene of northern Bonaire, Netherlands Antilles, include well-preserved carapaces of Montezumella rutteni Van Straelen, originally described from an incomplete holotype. The more comprehensive description of this species provided herein includes documentation of the first attributable left cheliped of Montezumella. From the same locality, Ocalina sublevis sp. nov. considerably extends the known geographic range of this genus. Both of these Tethyan decapod genera apparently migrated west from the Mediterranean region during the Eocene. Despite these new determinations, decapod crustaceans remain poorly known from the Eocene of the Antillean islands. Additionally, Callianassa pustulosa Withers from the...
Tipo: Article / Letter to the editor Palavras-chave: Crustacea; Decapoda; Systematics; Eocene; Bonaire; Netherlands Antilles; 42.85.
Ano: 2005 URL: http://www.repository.naturalis.nl/record/210098
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Fossil brachiopods from the Pleistocene of the Antilles Naturalis
Harper, D.A.T.; Donovan, S.K..
Pleistocene brachiopods are poorly known from the Antillean region, but are locally common in forereef deposits of Jamaica (lower Pleistocene Manchioneal Formation) and Barbados (Coral Rock). Of the four species known, two are new. Lacazella sp. cf. L. caribbeanensis Cooper, an encrusting thecideidean, is known from only three valves. Other species are terebratulides. Tichosina inconstanta sp. nov. is a large, ventribiconvex Tichosina species of elongate oval to tear-drop shaped outline, variably uniplicate with a pedicle foramen of moderate diameter. It differs from the similar Tichosina? bartletti (Dall) in having a larger pedicle foramen and a less-marked plication. Argyrotheca barrettiana (Davidson) is a medium to large, usually transverse Argyrotheca...
Tipo: Article / Letter to the editor Palavras-chave: Brachiopoda; Pleistocene; Systematics; Jamaica; Barbados; Antilles; 42.72; 38.22.
Ano: 2007 URL: http://www.repository.naturalis.nl/record/314198
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Fossil Crustacea of the Late Pleistocene Port Morant Formation, west Port Morant Harbour, southeastern Jamaica Naturalis
Collins, J.S.H.; Donovan, S.K.; Stemann, T.A..
The Late Pleistocene Port Morant Formation of southeast Jamaica is particularly rich in fossil marine crustaceans. A new locality on the west side of Port Morant Harbour, parish of St. Thomas, has yielded decapods including the callianassids Lepidophthalmus jamaicense? (Schmitt ), Neocallichirus peraensis Collins et al. and Neocallichirus? sp.; anomurans Petrochirus bahamensis (Herbst) and Paguristes sp. cf. P. lymanni A. Milne-Edwards & Bouvier; and brachyurans Hepatus praecox Collins et al., Persephona sp., Mithrax acuticornis Stimpson, Mithrax verrucosus H. Milne Edwards, Mithraculus forceps A. Milne-Edwards, aff. Hyas sp., Portunus vocans (A. Milne-Edwards), Achelous sebae (H. Milne Edwards), Actaea sp. cf. A. bifrons Rathbun, Actaea acantha (H....
Tipo: Article / Letter to the editor Palavras-chave: Jamaica; Pleistocene; Crustacea; Decapoda; Cirripedia; 42.74.
Ano: 2009 URL: http://www.repository.naturalis.nl/record/301551
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Fossils of the type Maastrichtian Naturalis
Jagt, J.W.M.; Donovan, S.K.; Jagt-Yazykova, E.A..
The south-western Indian Ocean islands, excluding the microcontinent of Madagascar, are geologically complex and diverse. They have been subject to drastic sea level changes, volcanic events and anthropogenic changes, all of which have contributed to confuse understanding of their avian biogeography. An array of factors have affected these avifaunas, based on palaeontological, historical and molecular evidence,which together have shown that avian biogeography is not congruent with the relative age and size of the islands.
Tipo: Article / Letter to the editor Palavras-chave: Macrofossils; Cretaceous; Maastrichtian; Mesozoic; Geology; Palaeontology; 38.20; 38.22.
Ano: 2012 URL: http://www.repository.naturalis.nl/record/428551
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Island slopes and jumbled shell beds Naturalis
Donovan, S.K.; Portell, R.W.; Waveren, I.M. van.
Shell beds pose questions of provenance, but determining degree of transport of bioclasts before deposition can be speculative.
Tipo: Article / Letter to the editor Palavras-chave: Shell beds; Island; Bioclasts; 38.22; 42.73.
Ano: 2011 URL: http://www.repository.naturalis.nl/record/428090
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Islands: Palaeontology, Geology and Tectonics Naturalis
Donovan, S.K..
The intention of this Lyell Meeting is to bring together tectonicists, geologists, palaeontologists and geomorphologists to discuss the intersection of their specialisms in the geology of islands.
Tipo: Article / Letter to the editor Palavras-chave: Lyell meetings; Islands; Geology; Palaeontology; Tectonics; Evolution; Isolation; 38.20; 38.37; 38.22.
Ano: 2011 URL: http://www.repository.naturalis.nl/record/428038
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Lower Miocene echinoderms of Jamaica, West Indies Naturalis
Donovan, S.K.; Portell, R.W.; Veltkamp, C.J..
Despite being diverse globally, Miocene echinoids are poorly known from Jamaica. Moderately diverse echinoids and other echinoderms have been identified mainly from fragmentary specimens collected from chalks and mass-flow deposits of the Lower Miocene Montpelier Formation, White Limestone Group, near Duncans, parish of Trelawny. This locality has yielded the most diverse association of fossil echinoderms known from the Miocene of Jamaica, including at least ten species in four classes. This fauna is comprised of the isocrinid crinoids Neocrinus sp. cf. N. decorus (Wyville Thomson) and Isocrinus sp.; the ophiuroid Ophiomusium? sp.; the asteroids Astropecten? spp.; and the echinoids Prionocidaris? sp., Histocidaris sp., Echinometra sp. cf. E. lucunter...
Tipo: Article / Letter to the editor Palavras-chave: Systematics; Crinoids; Asteroids; Ophiuroids; Echinoids; Neogene; Caribbean; 42.72.
Ano: 2005 URL: http://www.repository.naturalis.nl/record/210104
Registros recuperados: 29
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